The Impact on Ecosystem Services and the Satisfaction Therewith of Community Forest Management in Northern Thailand

: Forest ecosystems provide myriad services that are beneﬁcial to local livelihoods. Successful community forest management (CFM) enhances the provision, overall beneﬁt, and effectiveness of the regulation of ecosystem services and contributes to forest conservation efforts. The study area was a deciduous forest in the Ban Mae Chiang Rai Lum Community Forest, which is located in Pa Mae Phrik National Forest Reserve in Thailand’s northern province of Lampang. A systematic sampling of the forest area was conducted, and survey plots were established. A ﬁeld survey documented 197 plant species from 62 families. A questionnaire that focused on CFM engagement behavior and ecosystem service satisfaction levels was used to interview household representatives. The study found that levels of engagement and the effectiveness of forest management were directly related; increased CFM effectiveness leads to improved ecosystem services. Participation in CFM can improve ecosystem services and enhance livelihoods. Speciﬁcally, participation in decision making, forest ﬁre management, check dam construction, beneﬁt sharing, and in forming effective forest regulations positively impacted ecosystem services. In contrast, employing forest patrols adversely affected those services. This knowledge is useful for identifying policies and practices that can maximize ecosystem services to enhance livelihoods and safeguard the forest’s vitality.


Introduction
A forest ecosystem is a source of timber, economic benefits, and biological diversity, and as such provides a range of services that include environmental and recreational functions [1,2]. These ecosystem services have been defined by the Millennium Ecosystem Assessment (2005) as the benefits people receive from an ecosystem, including provisioning (e.g., food, fresh water, wood, fiber, fuel, genetic resources), regulating (e.g., climate, floods, disease, water flow), and cultural services (e.g., aesthetics, spirituality, recreation, ecotourism) [3]. Many studies have revealed that these ecosystem services result from effective forest management [2,4,5]. Thus, the efficiency of forest management can influence the existence, quality and viability of these benefits and can, therefore, concomitantly be linked to human well-being.
Thailand is an ASEAN country richly endowed with forests that cover 31.64% of its total area [6]. The forests are vital to the country as approximately 23 million people live near national forest reserve areas and depend on their ecosystem benefits for subsistence and income opportunities [7]. They continue to play a significant role in economic, social, the crucial ecosystem services provided by the forest [34,35]. Such knowledge can be helpful in promoting and expanding the role of local people in managing forest resources [36] and in positively impacting ecosystem services in Thailand. Our study would help to provide information necessary to improve ecosystem service benefits through CFM.
Therefore, the objectives of this study were to (1) assess the ecological characteristics of a deciduous forest contained in a community forest, (2) identify a community's forest management practices and the ecosystem services they provide, and (3) determine the relationship between these practices and services in order to inform more sustainable community forest management.
Several previous studies have indicated that CFM positively impacts ecosystem services such as climate regulation, carbon sequestration, hydrological services, pollination, and the provision of habitats [37][38][39]. In addition, the utilization of NTFPs was found to be closely related to participation in CFM [40]. Similarly, greater participation resulted in more effective forest management [41,42]. These findings are consistent with other studies [43][44][45][46][47]. Therefore, this study hypothesized that CFM is expected to improve ecosystem services. In addition, the effectiveness of CFM will reflect the engagement levels in the community forest. This increased engagement will subsequently improve the functional production systems of the forest and qualitatively and quantifiably develop provisioning, regulating, and cultural services.

Study Area
This study was conducted in the Ban Mae Chiang Rai Lum Community Forest (17°22′48′′ N to 17°27′47′′ N and 99°00′47′′ E to 99°05′48′′ E) which is part of the Pa Mae Phrik National Forest Reserve of Lampang Province in northern Thailand. The study area is one of the largest community forests in Thailand with an area of 3925 ha. It ranges in altitude from 140 to 660 m and has been classified as a deciduous forest [48] (Figure 1). The study area experiences two distinct seasons: a wet season from April to October and a dry season from November to March. Drought conditions are common. According to the Thai Meteorological Department's 2018 data, temperatures ranged from 31.7 • C in January and November to 37.1 • C in March, while the mean annual temperature was 33.6 • C, relative humidity had a mean of 76.1%, and the mean rainfall was 1129.4 mm [49].
Forest resources in the study area have historically been under pressure and remain so as a result of illegal logging, deforestation, degradation, and the increasing demands for agricultural land from a growing population. This area also experiences periodic drought conditions which contribute to the need for corrective and remedial actions and policies to safeguard resources.
Since 2008, the study forest area has been collaboratively managed by local residents and the government in accordance with a community forest management program. CFM has proven to be an effective approach in supporting the livelihoods of nearby residents [50,51]. In spite of the longevity of CFM in this forest and throughout Thailand, minimal and insufficient data are available to effectively analyze the impact that CFM has on ecosystem service benefits and to determine what, if any, relationship there is between the two.

Research Framework
The protection of forest resources through CFM has been shown to be more effective than the non-CFM management efforts such as reducing deforestation and minimizing human disturbances [52,53]. In addition, it has been reported that carbon stock, forest cover, tree basal area, and tree stem density are more positively impacted in CFM areas when compared with non-CFM areas [52][53][54]. CFM is closely related to enhancing the provision, overall benefit, and effectiveness of ecosystem services [35,55]. Thus, CFM could potentially have a positive impact on forest conditions, satisfaction with CFM and the ecosystem services that the forest provides.
There are four components of CFM: (1) the level of participation in management efforts, (2) knowledge of regulations and opinions as to the levels of compliance with, and the effectiveness of, those regulations, (3) understanding and perception of CFM, and (4) the sharing of forest resource benefits [25,[56][57][58][59]. Investigating these components can help us assess the effectiveness of CFM.
It has been found that the degree to which the households in the community participate in CFM vary, and the extent to which households avail themselves of the benefits of the forest's ecosystem services are likewise unique. Studies have also determined that participation in local CFM improves the effectiveness of forest resource management [36,53,[60][61][62]. This, in turn, elevates the ecosystem service benefits thereby resulting in higher community satisfaction. Therefore, maximizing CFM participation can lead to enhanced ecosystem service benefits.
We, therefore, posit that effective CFM can improve (1) provisioning, (2) regulating, and (3) cultural services, the three primary ecosystem services, and ultimately enhance the benefits that accrue to the people of the community (Figure 2).

Variables
The variables and description of factors on ecosystem services and CFM are shown in Table 1. Participation in CFM is multi-faceted. According to the FAO (2005), it is a process in which stakeholders influence policy formulation and investment choices [63]. They share control over development initiatives and management decisions and establish a necessary sense of ownership among their local communities. There are different methods and degrees of participation [64]. Appendix A details the question types, subject matter, and response options constituting the questionnaire. The Appendix also provides a general explanation of the information-gathering methodology. Informed household representatives who were involved in forest management as active members, other supporters, or passive members were all interviewed [65]. Opinions as to the below-described ecosystem services and CFM factors were investigated:

Variables
The variables and description of factors on ecosystem services and CFM are shown in Table 1. Participation in CFM is multi-faceted. According to the FAO (2005), it is a process in which stakeholders influence policy formulation and investment choices [63]. They share control over development initiatives and management decisions and establish a necessary sense of ownership among their local communities. There are different methods and degrees of participation [64]. Appendix A details the question types, subject matter, and response options constituting the questionnaire. The Appendix A also provides a general explanation of the information-gathering methodology. Informed household representatives who were involved in forest management as active members, other supporters, or passive members were all interviewed [65]. Opinions as to the below-described ecosystem services and CFM factors were investigated: Level of satisfaction from sharing the benefits fairly and equitably of the community forest in environmental, social, and economic benefits CFM = Community forest management, NTFPs = non-timber forest products, THB = Thai baht.

Ecosystem services
Forest ecosystem services are the benefits from forest resources that directly affect people and provide support for the maintenance of other services. In line with the Millennium Ecosystem Assessment (2005), the satisfaction of the people with three of the community forest ecosystem services [3] was investigated as follows.
1. Provisioning services: the benefits that people obtain from food, medicine, fuelwoods, fibers, and extractives (e.g., resins, gums, oils, waxes, and chemicals), fresh water, and the biodiversity that reflects genetic resources.
2. Regulating services: the benefits that people receive from the regulation of ecosystem processes related to air, soil, pollination, windstorms, pests and disease, and water yield.
3. Cultural services: the benefits resulting from the support of culture, traditions, beliefs, religions, local wisdom, and recreation and ecotourism.

•
Community forest management (CFM) Involvement in forest management can lead to improved forest conditions that yield more abundant and beneficial forests. According to Cohen and Uphoff (1980), there are four levels of participation: decision making, implementation, evaluation, and benefiting [66].
1. Prompting involvement in decision-making processes is essential for improving forest management. Coulibaly-Lingani et al. (2011,2014) found that the opportunity to engage in decision making is a primary incentive to participate in forest management in general which, in turn, is strongly correlated with enjoying forest-sourced economic benefits [45,67].
2. Forest activities are vital to improving conditions and enhancing ecosystem services for the benefit of those who rely on the forest for subsistence or income [68]. In Thailand, various measures are employed, including plantation, protection and weed control efforts, patrols, forest fire control, surveys and alignment, building check dams (structures that span streams with sandbags, or rock, branches, or other natural material to inhibit wa-Sustainability 2021, 13, 13474 7 of 31 ter flow, retard erosion, and increase soil hydration), and cultural and traditional forest events [69,70].
3. Unfettered and unmonitored utilization of NTFPs can have a negative impact on species diversity as well as on the amount and variety of NTFPs [71,72]. Monitoring means the general, ongoing observation of the patterns of utilization of forest resources and the subsequent impact on species and forest health. In addition, it includes managing forest fires, being involved in forest activities and being knowledgeable of the effect of such utilization on forest resources. 4. The opportunity to utilize the forest for income prompts involvement in public forest programs and activities, which enhances forest management success and improves ecosystem services [36,73]. Thus, household income for 2018 from food, medicine, fuelwood, fiber, and extractive NTFPs was assessed as part of this study.
Successful forest management depends on additional factors that can impact community forests, such as: 5. Regulations are crucial tools for forest management and monitoring the utilization of resources [30,73]. Kongcharoen (2012) showed that communities can efficiently enforce their own regulations [74]. Community members have also viewed strict rules and regulations as inadequate [75]. In this study, we investigated residents' knowledge of forest regulations and asked their opinions regarding the effectiveness of and compliance with those regulations.
6. Perception, understanding, and knowledge of the principle of sustainable forest management also impact the effectiveness of CFM [50,75]. While it is true that any household can access forest resources and have an impact on the effectiveness of CFM, households with a better understanding of the importance of sustainability and more knowledge of the available resources and technologies can more effectively supplement their income by collecting and utilizing NTFPs [26,27]. This knowledge can increase interest in forest conservation [43][44][45][46][47].
7. Sharing forest benefits through transparent processes is also a component of successful CFM. Doing so fosters an environment that motivates relevant stakeholders to become more responsible in their use of natural resources to the benefit of community livelihoods in general [36,76].

Data Collection
A field survey related to ecosystem services, species diversity, and NTFPs in the community forest was conducted from July to October 2018. The forest comprises 3925 ha. In line with the findings of ANSAB (2010), 0.1% of the total inventory was sampled [77]. Twenty-five sample plots measuring 40 × 40 m each were established using a systematic sampling method. In each plot, all plant species with a diameter at breast height (DBH) ≥4.5 cm were identified and measured in 10 × 10 m sub-quadrats. Within the 10 m subquadrats, saplings with a DBH <4.5 cm and a height >1.30 m were recorded in 4 × 4 m sub-quadrats, while seedlings were documented in 1 × 1 m sub-quadrats within each 4 m sub-quadrat. The sample plot locational information is shown in Figure 3.

Data Analysis
Plant species were categorized into their family, genera, and species. A comparison of unknown specimens was conducted with those in the Forest Herbarium of the Department of National Parks, Wildlife and Plant Conservation to classify species that were not initially identifiable [78]. In order to ascertain the ecological characteristics of the community forest, the number, density, and basal area of the trees were calculated.

Data Analysis
Plant species were categorized into their family, genera, and species. A comparison of unknown specimens was conducted with those in the Forest Herbarium of the Department of National Parks, Wildlife and Plant Conservation to classify species that were not initially identifiable [78]. In order to ascertain the ecological characteristics of the community forest, the number, density, and basal area of the trees were calculated.
The importance value index (IVI) was used to determine the ecological importance of the tree species in each forest by calculating the following: where R.D is the relative density of the tree species, and is equal to number of individuals of the species × 100/total number of quadrate studies; R.F is their relative frequency, calculated as the number of quadrates in which species occurred × 100/total number of quadrate studies; and R.Do is their relative dominance, which is equal to the total basal area of species × 100/total basal area of all the species [79]. Additionally, tree DBH and height classes were investigated to identify trends in the density, growth, and regeneration of species. Shannon-Wiener indices (H′) were also computed to determine the forest's biodiversity using this equation: (2) where is number of species, and pi is the proportion of individuals found in the th species.
NTFPs can be classified in many ways. They are classified by mode of utilization in Thailand. Biodiversity inventories usually group animals and plants according to the scientific names of their family and genera. Ethno-botanical studies classify according to local end uses (e.g., food, medicine, fuelwood, fiber, extractive). Foresters and forest-based assessments use groupings according to plant form and parts used (e.g., non-wood tree parts, fruit, herbs, climbers, shrubs, etc.) [80]. In this study, we grouped the NTFPs into five categories based on the general classification that has been applied in other studies in Thailand [12,13,81]. Accordingly, NTFPs were separated into food plants, medicinal plants, fuelwoods, fibers, and extractives.

Data Collection
A systematic sampling method was used to determine a representative number of households to be interviewed. Using proportional sampling and applying the formula proposed by Yamane (1967), a sample size was determined [82]. The formula utilized is: The importance value index (IVI) was used to determine the ecological importance of the tree species in each forest by calculating the following: where R.D is the relative density of the tree species, and is equal to number of individuals of the species × 100/total number of quadrate studies; R.F is their relative frequency, calculated as the number of quadrates in which species occurred × 100/total number of quadrate studies; and R.D o is their relative dominance, which is equal to the total basal area of species × 100/total basal area of all the species [79]. Additionally, tree DBH and height classes were investigated to identify trends in the density, growth, and regeneration of species. Shannon-Wiener indices (H ) were also computed to determine the forest's biodiversity using this equation: where s is number of species, and pi is the proportion of individuals found in the ith species. NTFPs can be classified in many ways. They are classified by mode of utilization in Thailand. Biodiversity inventories usually group animals and plants according to the scientific names of their family and genera. Ethno-botanical studies classify according to local end uses (e.g., food, medicine, fuelwood, fiber, extractive). Foresters and forest-based assessments use groupings according to plant form and parts used (e.g., non-wood tree parts, fruit, herbs, climbers, shrubs, etc.) [80]. In this study, we grouped the NTFPs into five categories based on the general classification that has been applied in other studies in Thailand [12,13,81]. Accordingly, NTFPs were separated into food plants, medicinal plants, fuelwoods, fibers, and extractives.

Data Collection
A systematic sampling method was used to determine a representative number of households to be interviewed. Using proportional sampling and applying the formula proposed by Yamane (1967), a sample size was determined [82]. The formula utilized is: where n = the sample size to be estimated, N = the number of households, and e = the significance level (0.05). It was determined that 159 of the 265 total households in the subject area community would provide sufficient sampling intensity for the interview portion of the study. The interviews utilized a pre-developed questionnaire that consisted of requests for specific demographic data, questions that provided multiple response choices (single/multiple Sustainability 2021, 13, 13474 9 of 31 answers and for Likert scale application), and questions that presented opportunities for open-ended responses, as described in more detail as follows: 1. Socio-demographic information, such as gender, age, marital status, role in family, education level, household size, primary occupation, household income, and land ownership, was sought to understand the makeup of the community.
2. Information regarding household income from the harvest and utilization of these nine categories of NTFPs was obtained: food (edible plants, wild fruits, mushrooms, honey and insects, and small animals), medicinal plants, fuelwoods, fibers, and extractives [12,13,81].
3. Methods and degrees of engagement in CFM and satisfaction with ecosystem services and their benefits were determined through interviewee responses on a scale of 1-5 (5 = 'very high', 4 = 'high', 3 = 'moderate', 2 = 'low', and 1 = 'very low'), which were averaged and interpreted based on a five-point Likert scale.
Respondents were also asked to rate their levels of participation in decision making, forest activities, and monitoring and evaluation activities, as well as rate the effectiveness of regulations and the degree to which the community shares the accessible benefits, on the same 1-5 scale.
Levels of satisfaction with provisioning, regulating and cultural ecosystem services were determined in the same fashion.

Data Analysis
The net return from the utilization of the nine categories of NTFPs in 2018 was determined by subtracting the 'opportunity' and 'transportation' costs from the total income. The minimum daily wage in Thailand of THB 300 (USD 9.68) was used to calculate the economic value of the NTFPs that were harvested for subsistence or trade based on the time involved in doing so. In addition, transportation (fuel) costs were considered in a calculation of the net return: where, Pi = price of the good, i = category of NTFP, Q h i = quantity of goods collected by household h, W = wage rate, L h = hours worked by households h, and Tc h = transportation costs incurred by households h.
To determine the degree of effectiveness of CFM and levels of satisfaction with ecosystem services, averaged interviewee responses were interpreted based on the mean interval ranges on a five-point Likert scale. The scale was broken down into equal mean intervals of 0.80 in order to provide a weighted mean. The interval ranges were calculated by subtracting one from five (the minimum and the maximum length on the scale), or 5 − 1 = 4, then dividing the resulting four by five, which is the greatest value on the scale, or 4/5, for a result of 0.80. The intervals are interpreted as 'very high' = 5.00-4.21, 'high' = 4.20-3.41, 'moderate' = 3.40-2.61, 'low' = 2.60-1.81, and 'very low' = 1.80-1.00.
A chi-squared test of independent variables was used to determine the relationship between CFM factors and the ecosystem services.
A binary logistic regression analysis was used to understand how differently the various levels of participation in CFM affect ecosystem services. CFM and ecosystem service variables were coded as 1 if 'very high' and coded as 0 if otherwise, except for NTFP income variables which were coded as 1 if >5000 THB and 0 if otherwise. The impact of community forest management on ecosystem services was calculated using this equation: where, P = the probability of the event that Y = 1 (ecosystem services), β o = the regression intercept, β i = the regression coefficient of the ith CFM factor, X i = the ith CFM factor influencing the ecosystem services, and ε = the random disturbance term. All statistical calculations were performed using the Windows version of the R 4.1.1 (10 August 2021) program for datasets, graphics, and stats packages [83].

Ecological Characteristics of the Community Forest
The field survey of the forest led to the identification of 18,567 plants of 197 species (129 mature tree, 99 sapling, and 141 seedling species), 144 genera, and 62 plant families with an average density of 966 trees ha −1 and an average basal area of 16.74 m 2 ha −1 . The ecological characteristics of the mature trees (DBH ≥ 4.5 cm) in the community forest are shown in Table 2. The importance value indices of the primary species in the community forest are shown in Table 3. Shorea obtusa, Shorea siamensis, Xylia xylocarpa, Sindora siamensis, and Buchanania lanzan were the five most significant species.  Figure 4 below presents the distribution of mature trees in density ranges and height classes. Trees with a DBH <10 cm (49.02%) were the most abundant, followed by trees with a DBH of 10-20 cm (37.09%), 20-30 cm (9.70%), and >30 cm (4.19%). Overall, the DBH ranged from 4.50 to 64.34 cm with a mean of 11.53 ± 6.71cm.
The range of the height classes of trees was 1.30-25.00 m with a mean height of 8.65 ± 3.29 m. Trees in the 5-10 m class (55.84%) had the highest density, followed in descending order by the 10-15 m class (25.75%), the 1.3-5 m class (15.84%), and the >15 m class (2.69%).

Species Biodiversity and its NTFP Producing Contribution
The average diversity indices of the deciduous forest stands in the Ban Mae Chiang Rai Lum Community Forest were calculated to be 2.49 ± 0.28 (mature trees), 2.25 ± 0.32 (saplings), and 2.44 ± 0.43 (seedlings). Of the 197 NTFP-producing species found in the community forest, 160 have medicinal uses, 89 are used as food, 37 are used as extractives, 32 as fuelwoods, and 12 are used as fibers (Table 4).  Tree  92  47  74  25  6  27  Shrub  53  23  49  7  1  10  Climber  25  9 17 Total  197  89  160  32  12  37 NTFPs = non-timber forest products. * Due to some plants being used for different NTFPs, the total number of species is not equal to the cumulative total of species used as NTFPs.

Species Biodiversity and Its NTFP Producing Contribution
The average diversity indices of the deciduous forest stands in the Ban Mae Chiang Rai Lum Community Forest were calculated to be 2.49 ± 0.28 (mature trees), 2.25 ± 0.32 (saplings), and 2.44 ± 0.43 (seedlings). Of the 197 NTFP-producing species found in the community forest, 160 have medicinal uses, 89 are used as food, 37 are used as extractives, 32 as fuelwoods, and 12 are used as fibers (Table 4).  Total  197  89  160  32  12  37 NTFPs = non-timber forest products. * Due to some plants being used for different NTFPs, the total number of species is not equal to the cumulative total of species used as NTFPs.

Socio-Demographics of Respondents
A composite of the household survey data is shown in Table 5. Respondents were between 26 and 86 years old, though they were primarily 30-60 years old (62.89%) and female (62.89%). The vast majority were married (72.33%) and the heads of their household (62.26%). Most had attained an elementary school education (67.92%). Smaller families (three members or less) were more common (57.86%) and farming (83.65%) was the primary occupation. More households (38.36%) reported an income range between THB 62,000-124,000 (USD 2000-4000) than any other range of income. A large majority of respondents were landowners (88.05%).

Utilization of Non-Timber Forest Products (NTFPs)
In this study, we categorized the 159 households into three groups based on the nature of their NTFP usage: (a) harvest and use (HAU), (b) non-harvest but use (NHBU), and (c) neither harvest nor use (NHNU).
Households in the NHBU category relied on NTFPs but either collected or bought from other sources, including harvesters, sellers, or collectors of harvested NTFPs. They did not harvest the NTFPs themselves. Of the NTFPs that these households utilized, honey and insects were used by the most households (64.78%). Small animals (45.28%), mushrooms (32.70%), and wild fruit (23.27%) were also used but not harvested.
More specific NTFP household harvest and usage details are provided in Table 6. households neither relied on nor used wild fruits, honey and insects, small animals, or edible mushrooms. More specific NTFP household harvest and usage details are provided in Table 6.   The total net return from NTFPs to the community was estimated at THB 1,871,117.30 (USD 60,358.62). Averaging the net return would yield THB 7060.82 (USD 227.77)/year to each household. When comparing income with the cost of collection, mushrooms provided the highest percentage of net return (73.47%) followed by wild fruits (14.93%), small animals (6.04%), and edible plants (3.18%). Figure 6a shows a breakdown of the percentage of the returns for all of the primary NTFPs. Data regarding some other NTFPs, such as fibers or extractives, were not included as their value was insignificantly low or because they were not collected for household use. The total net return from NTFPs to the community was estimated at THB 1,871,117.30 (USD 60,358.62). Averaging the net return would yield THB 7060.82 (USD 227.77)/year to each household. When comparing income with the cost of collection, mushrooms provided the highest percentage of net return (73.47%) followed by wild fruits (14.93%), smal animals (6.04%), and edible plants (3.18%). Figure 6a shows a breakdown of the percentage of the returns for all of the primary NTFPs. Data regarding some other NTFPs, such as fibers or extractives, were not included as their value was insignificantly low or because they were not collected for household use.
(a)   year. NTFPs tended to supplement the income of lower income households which lends support to the idea that rural livelihoods could financially benefit from NTFPs.

CFM and Participation Levels
Overall, people were engaged in CFM at a 'high' level (4.07 ± 0.42), and this engagement was demonstrated in many ways. Specifically, it was reflected in their perception and understanding of CFM and sustainable forest management (4.75 ± 0.29), their level of satisfaction with the sharing of benefits (4.61 ± 0.47), the effectiveness of forest regulations (4.27 ± 0.62) and compliance with forest regulations (4.82 ± 0.30), which were 'very high'. In addition, their knowledge of forest regulations (3.94 ± 0.69) and participation in forest activities (3.81 ± 0.81) were 'high'. However, involvement in decision-making processes (3.35 ± 0.91) and in monitoring and evaluation activities (3.03 ± 0.92) was 'moderate'. The percentages, levels, and forms of engagement in CFM are shown in Figure 7.

Ecosystems Services and Satisfaction Levels
Overall, a 'very high' level of satisfaction was reported with the benefits the respondents received from general provisioning (4.21 ± 0.47), regulating (4.35 ± 0.40), and cultural services (4.60 ± 0.43) (Figure 8). The satisfaction level with the provisioning of food was 'very high' (4.75 ± 0.43). This was their highest satisfaction level and was followed by biodiversity (4.61 ± 0.62), fuelwoods (4.54 ± 0.65), medicinal plants (4.50 ± 0.57), and fibers (4.20 ± 0.78). Respondents had a 'high' level of satisfaction with the provision of fresh water (3.96 ± 0.82), while they were 'moderately' satisfied with the provision of extractives (2.91 ± 1.02). There was a 'very high' level of satisfaction with the air quality and climate regulation (4.77 ± 0.52), pollination (4.69 ± 0.52), soil erosion regulation (4.59 ± 0.56), and windstorm protection (4.28 ± 0.72). A 'high' level of satisfaction with pest and disease regulation (4.16 ± 0.67) and water regulation and purification (3.62 ± 0.70) were reported. and understanding of CFM and sustainable forest management (4.75 ± 0.29), their level of satisfaction with the sharing of benefits (4.61 ± 0.47), the effectiveness of forest regulations (4.27 ± 0.62) and compliance with forest regulations (4.82 ± 0.30), which were 'very high'. In addition, their knowledge of forest regulations (3.94 ± 0.69) and participation in forest activities (3.81 ± 0.81) were 'high'. However, involvement in decision-making processes (3.35 ± 0.91) and in monitoring and evaluation activities (3.03 ± 0.92) was 'moderate'. The percentages, levels, and forms of engagement in CFM are shown in Figure 7.

Ecosystems Services and Satisfaction Levels
Overall, a 'very high' level of satisfaction was reported with the benefits the respondents received from general provisioning (4.21 ± 0.47), regulating (4.35 ± 0.40), and cultural services (4.60 ± 0.43) (Figure 8). The satisfaction level with the provisioning of food was 'very high' (4.75 ± 0.43). This was their highest satisfaction level and was followed by biodiversity (4.61 ± 0.62), fuelwoods (4.54 ± 0.65), medicinal plants (4.50 ± 0.57), and fibers (4.20 ± 0.78). Respondents had a 'high' level of satisfaction with the provision of fresh water (3.96 ± 0.82), while they were 'moderately' satisfied with the provision of extractives (2.91 ± 1.02). There was a 'very high' level of satisfaction with the air quality and climate regulation (4.77 ± 0.52), pollination (4.69 ± 0.52), soil erosion regulation (4.59 ± 0.56), and windstorm protection (4.28 ± 0.72). A 'high' level of satisfaction with pest and disease regulation (4.16 ± 0.67) and water regulation and purification (3.62 ± 0.70) were reported. Furthermore, a 'very high' level of satisfaction was reported with the cultural services that are related to traditions, beliefs, religions, and local wisdom (4.89 ± 0.36) as well as with the benefits from recreation and ecotourism (4.31 ± 0.74). Furthermore, a 'very high' level of satisfaction was reported with the cultural services that are related to traditions, beliefs, religions, and local wisdom (4.89 ± 0.36) as well as with the benefits from recreation and ecotourism (4.31 ± 0.74).

The Nature of CFM Engagement and Ecosystem Services
A chi-squared test of independence was performed to examine the relationship between CFM and ecosystem services. There were apparent differences between the levels of participation in CFM and ecosystem services (p < 0.05, p < 0.01, and p < 0.001), suggesting that the levels of satisfaction with ecosystem services varied depending on CFM participation levels ( Table 7).

The Nature of CFM Engagement and Ecosystem Services
A chi-squared test of independence was performed to examine the relationship between CFM and ecosystem services. There were apparent differences between the levels of participation in CFM and ecosystem services (p < 0.05, p < 0.01, and p < 0.001), suggesting that the levels of satisfaction with ecosystem services varied depending on CFM participation levels (Table 7).

Participation in CFM and the Impact on Ecosystem Services
The binary logistic regression results demonstrate the relationship between participation in CFM and satisfaction with ecosystem services (Table 8). Overall, the logit model with predictors showed that engagement in CFM strongly affects ecosystem services (Pseudo R 2 = 0.457, p < 0.01). Participation in CFM also had an effect on provisioning (Pseudo R 2 = 0.408, p < 0.05), regulating (Pseudo R 2 = 0.359, p < 0.01), and cultural services (Pseudo R 2 = 0.272, p < 0.05).  Specifically, benefit sharing significantly and positively impacted regulating (p < 0.001), provisioning, and cultural services (p < 0.01), and effective forest regulations also had a strong positive relationship with these ecosystem services (p < 0.001). Involvement in the decision-making process and the building of check dams also had a positive relationship with provisioning services, while efforts to prevent and control forest fires had a positive effect on cultural services (p < 0.05). However, the implementation of forest patrols showed a negative correlation at p < 0.05 with regulating and at p < 0.01 with cultural services.

Community Forest Provision of Ecosystem Services
The inventory of the Ban Mae Chiang Rai Lum Community Forest yielded a total of 18,567 plants that encompassed 197 species, 144 genera, and 62 plant families. We also identified 129 mature tree, 99 sapling and 141 seedling species. The number of species identified in this study was higher than those recorded in other studies in Thailand: 125 species were recorded in the Na Haeo Forest Reserve [84], 97 species in the Khok Bung Preu Forest [10], and 42 species in the Sakaerat Environmental Research Station [85]. Tables 2 and 3, displayed above, detail the ecological characteristics and outline the dominant species in the subject forest. The prominent and significant species are akin to those found in similar forests in Thailand [10,[85][86][87][88][89][90]. The average diversity index of mature trees (H ) was 2.49 ± 0.28, which is mid-range when compared with other deciduous forests in Thailand [90][91][92]. As for NTFPs, 160 of the 197 species have been classified as having medicinal uses, with 89 used as food, 37 as extractives, 32 as fuelwoods, and 12 species as fibers (Table 4). These findings are consistent with studies that have found that forest biodiversity can help people meet basic needs, generate income, and generally enhance their livelihoods [10,12,13,93,94].
Small-size class trees (DBH < 20 cm) were more abundant (Figure 4a). Tree density decreased as DBH increased, resulting in an inverted J-shaped graph [95][96][97][98]. This can reflect tree density, growth rate, and the successful regeneration of species, which are considered indicia of a healthy, stable, and strongly recruiting population [99][100][101][102]. In addition, Figure 4b reflects a normal distribution or bell-shaped curve of height classes, in which the tallest species reached the intermediate, middle-size class. This is consistent with Felfili (1997), wherein it was suggested that this pattern reflects a self-regenerating community [103]. Thus, the distribution of DBH and height classes in the community forest is a positive indicator of the future natural regeneration of tree species.
The forest is a source of food security; mushrooms, wild fruits, small animals, and edible plants were utilized to the greatest degree ( Figure 6a). As in other studies, rural people depended on NTFPs for subsistence and income, with 68.55% of the households surveyed indicating that they had a reliance on NTFPs [23,27,28,104,105]. The minimal harvest and reliance on other NTFPs, such as extractives, fibers, fuelwoods, honey and insects, and medicinal plants ( Figure 5), certainly contributed to the value of the harvested NTFPs being only 6.35% of the total annual income of the community. A multitude of factors could be determinants, however, such as high opportunity costs for extracting NTFPs, highly productive agricultural lands [50,106], food security [107], and higher wages as a laborer or profits from business [72]. The reasons that households or a community in general would or would not harvest and utilize NTFPs are varied and idiosyncratic, as are the economic factors that dictate price and value, supply and demand, and the efficacy of harvesting. In 2018, the Thai government raised the minimum wage. This incentivized seeking off-farm employment opportunities which could reduce the reliance on NTFPs.
A comparison of the NTFPs that are actually utilized ( Figure 5 and Table 6) with the forest's potential to supply NTFPs (Figure 4 and Table 4) indicates that usage of various plant species could be greater. This suggests at least the possibility of increased dependence on a wider variety and larger amount of NTFPs in the event that other opportunities become limited [28]. An untapped potential for greater income exists, which highlights the importance of enhancing forest biodiversity to ensure an expanded and ongoing supply of NTFPs. In addition, lower income households were likely to obtain a greater relative income from NTFPs than higher income households (Figure 6b), illustrating the forest's role in improving rural livelihoods [46,105,108].
Deciduous forests provide important services to remote, rural communities and cover nearly 20% of total forest areas in Thailand [8]. Consequently, the potential to provide ecosystem services in support of rural livelihoods is expansive.

Participation in CFM and Satisfaction with Ecosystem Services
The level of participation in CFM was 'high' (Figure 7), which translated into effective forest management. Similarly, there was a 'very high' level of satisfaction with ecosystem services (Figure 8). These results demonstrate a link between participation, improved forest conditions, enhanced ecosystem services, and elevated satisfaction. Thus, participation in CFM can positively impact ecosystem services [2,5].
Partially in response to historical and protracted encroachment, illegal logging, and the resulting damage to the viability of the forest, CFM has been implemented in Ban Mae Chiang Rai Lum since 2008. Collaborative management efforts between the government and local residents became more focused on forest plantations, fire protection and patrol, and the utilization of check dams. As a result, the community forest showed signs of restoration, and the damage caused by years of deforestation and degradation has been mitigated [109]. Plant density, growth rates, and the regeneration of plant species in the community forest increased in the study area under CFM. In addition, when compared with deciduous forests in northern Thailand that have been the focus of other studies, the species diversity in this study area was higher than forest areas under government management [110,111]. The evidence suggests that the community forest sector, through successful management, can play a role in improving ecosystem services [35].
Contrary observations have been made [112][113][114], but in this study the level of satisfaction with provisioning services was lower than that of the other services. Though mushroom harvesting was engaged in the most, the relatively minimal utilization of the other provisioning services (e.g., fibers, fuelwoods, medicinal plants, and edible plants) reduced the overall satisfaction with provisioning services.
To an indeterminable extent, the low incomes from NTFPs are indicative of a lack of significant dependence on the forest, and this lack of reliance could be the reason for the reported satisfaction levels. There are many possible explanations for a lack of dependence on NTFPs. For instance, a study conducted in Tanzania by Mushi et al. (2020) highlighted that households with few members, a high level of income, and greater available arable land are less willing to depend on NTFPs [106]. Nonetheless, the utilization of provisioning services should be promoted, for higher levels of satisfaction will lead to greater participation, more effective CFM, and enhanced services. Table 7 details how the different types and levels of CFM participation, including forest activities, knowledge of forest management, benefit sharing, and forest regulation, were related to provisioning, regulating, and cultural ecosystem services. Relationships between demographics and social forestry involvement can be identified. Efforts to develop effective management practices can be informed by understanding these relationships. Table 8 shows the CFM factors that impacted the ecosystem services of the community forest in Ban Mae Chiang Rai Lum. These factors had both negative and positive effects on the forest benefits. This information can be used to identify suitable forest management policies to be implemented in this area.

Impact of CFM on Ecosystem Services
Benefit sharing and effective forest regulations had a significant, positive relationship with provisioning, regulating, and cultural ecosystem services. The people work together socially, utilize forest resources as they deem appropriate, and acknowledge everyone's right to do so. They feel a sense of fairness when working and enjoying the fruits of their labor equitably. Sharing benefits in this fashion serves to incentivize collaboration and is critical to improving forest conditions. Enjoying revenue and sharing benefits from forest products are good incentives to collaborate [43][44][45][46][47]. Further investigation may establish a clearer link between the transparent sharing of forest products with greater participation in management and enhanced biodiversity.
Effective forest regulations play a vital role in enhancing the provision and overall benefit of ecosystem services. In the study area, ecosystem services similarly depend on the effectiveness of regulations. In Thailand, there was no specific legislation regarding CFM prior to 2019; however, forest management practices and policies were permitted so long as community regulations did not conflict with the overarching forest laws. Residents opined that the effectiveness of forest regulations was 'very high' (Figure 7). This can, therefore, be a powerful tool with which to manage the community forest and can contribute to more effective CFM management [30,57,73,74].
Engagement in decision-making processes positively impacts provisioning services. Deciding on strategies and process matters is a vital component of overall involvement and is a basic right of local people [45,115]. Engagement in making public forest management activity decisions can result in more effective management and increase economic benefits [116]. Thus, decision making can lead directly to improved provisioning services and concomitant benefits. However, this study also found that engagement in decision making was at a 'moderate' level, suggesting that it had a limited impact on species conservation and utilization (Figure 7). In analyzing the same area as this study,  found that the rate of above-ground carbon sequestration would decrease from 2028-2038 under CFM when compared with the previous decade [109]. This highlights the importance of a long-term focus on all aspects of management participation to maximize the positive impact on ecosystem services for the sustained viability of the forest and its resources.
Fires are part of the fabric of daily living in Thailand. They are frequent during the dry season in deciduous forests, including mixed deciduous and dry dipterocarp forests [117,118]. They are employed for site preparation, disease and pest control, and to harvest NTFPs, but they are also used illicitly for logging, hunting, and shifting cultivation [119][120][121][122][123]. Regardless of their purpose, fires are a considerable forest management problem as they are all potential causes of large-scale forest fires. The RFD reported 3158 cases of forest fires in 2020 which damaged 10,100 ha, 90% of which occurred in the northern region of the country [6]. Addressing the problem through participation in fire prevention activities and integrated management efforts has a positive effect on cultural services.
Management efforts that are combined with various religious rituals that reflect deepseeded beliefs have been widely adopted to address and manage forest fires in northern Thailand. Buddhism is a strong cohesive force in every aspect of life in Thailand, and its spiritual tenets are called upon to help protect and safeguard the forests [57,124,125].
The 'Tod Pa Bah' Buddhist robe-offering ceremony provides an opportunity for the people of the community to make merit and to donate funds for conservation efforts. 'Suep Chata Pa' is a rite to boost the spirit and the morale of the people and prolong the life of the forest, while 'Buod Pa' is a tree ordination ceremony that is seen as a deterrent to illegal deforestation. In addition, many fire management strategies that are based on traditional knowledge and local wisdom are used to prevent and control forest fires [126,127], such as determining proper timing, size, and routes of firebreak lines, selecting suitable tree species to plant in drought areas to increase soil moisture, or employing specific techniques to extinguish fires using minimal water. Combined with proven management, prevention, and control strategies, these rituals provide opportunities to participate in ways that have a beneficial impact on ecosystem services.
Deciduous forests are classified as 'tropical dry forests' which suffer prolonged drought conditions for 5-6 months. During these dry periods, forest fires are a prime cause of damage [117,118]. Fire disturbances have crucial effects on the dynamics and regeneration of tree species in deciduous forests in Thailand [86,128]. In a study on this same area, tree species and distribution were found to be closely related to soil moisture and distance to streams [48]. Building check dams was required to ensure species diversity and safeguard NTFP supplies, thereby exemplifying their impact on provisioning services. Consequently, participation in building check dams is likely to have a positive effect on provisioning services.
Forest patrols are a powerful tool to control deforestation [129]. Communities establish groups to patrol for fires, encroachment, over-exploitation, or other problematic conditions. In this study, forest patrols negatively impacted regulating and cultural services. Though somewhat surprising at first glance, this could actually be a genuine reflection of the social capital of the remote, rural communities.
The norms, values, and attitudes that pre-dispose people to cooperate, trust, and reciprocate with an obligation to support the common rules, a network, or group constitutes social capital [130]. Along with traditions and longstanding ways of life, this social capital is extremely important within a community [57,131] and is one of the variables that work in favor of a community self-organizing to manage resources in pursuit of sustainability.
According to Ostrom (1990Ostrom ( , 2009), self-organization and engagement in efforts to achieve sustainability in a complex social ecological system (SES), such as a forest, can be influenced by the natural capital of the system (size, resource mobility, resource importance, predictability, and productivity), human capital (number of resource users, leadership, and knowledge of the system), and the moral and ethical standards of social capital [132,133]. Social capital can incentivize engagement and collective action to organize effective rules to manage the forest for the benefit of people's livelihoods and community forest improvement [134,135] In this study, we found inherent conflicts between patrol groups and those who use fires contrary to law or custom. These conflicts can lead to behaviors that are counterproductive to the very reason for the patrols. Incidents have been reported where fires have been intentionally set merely in retaliation to these groups and their conservation efforts [4,58]. Such disunity can compromise and militate against efforts to improve regulating and cultural ecosystem services.
Fires have an adverse effect on air and water quality, soil properties, and other forest ecosystem conditions [136][137][138]. Worldwide, the vulnerability of tropical dry deciduous forests to fires is greater than any other forest type [139]. Thus, the use of fire against forest patrols or for other illicit purposes exacerbates a naturally occurring problem and negatively impacts regulating services. Furthermore, improperly conducted patrols resulted in diminished trust in community forest projects [140]. A lack of trust in projects can lead to unwillingness to participate and would serve as a formidable obstacle to collaborative forest management. Thus, the promotion of proper patrols that can reduce conflict is needed. Furthermore, education, training, and increasing awareness of the importance of conservation and CFM are vital to reducing conflicts and securing a common goal within a community, because obtaining and sharing knowledge is an important factor in encouraging the self-governance of forest resources [132,133].
The number of community forest projects has increased rapidly and steadily since 1987. Presently, there are more than 15,000 existing CFM projects in Thailand [33]. This is evidence that government policies are effective at promoting collaboration and engagement in forest management through CFM. This expansion of CFM provides optimism for a brighter future for local livelihoods and conservation efforts. There are limitations, however.
According to Ostrom (1990Ostrom ( , 2019, it is difficult to find simple explanations as to why complex social-ecological systems deteriorate or solutions for how they can be improved. As was once the theory, no longer is it simply assumed that government mandated solutions are required; no longer is it simply assumed that people will not invest time and energy into protecting resources. Social scientists have found that, in some instances, government policies adversely impact resources, while the reasons that people self-organize are becoming more identifiable. Perhaps a balance can be found [132,133]. CFM in Thailand is presently regulated by the recently promulgated Community Forest Act B.E. 2562 (2019) [32]. This government mandate helps people self-organize by providing more opportunities to participate in decision making, use forest resources, get involved in conservation efforts, and contribute to overall forest management. CFM provides a forum to share knowledge, develop leadership, collectively develop rules, expand the number of resource users, and protect the productivity of the forest. These are all variables that contribute to energizing people to use their time and effort to achieve sustainability [132,133].
Unfortunately, this law also prohibits the implementation of CFM in vast swaths of protected forest areas such as national parks, wildlife sanctuaries, and non-hunting areas. Prohibiting CFM in these areas retains the obstacles to enhancing involvement and denies the local residents the opportunities created by effective CFM. This is an issue that needs to be addressed.

Conclusions
The deciduous community forest of Ban Mae Chiang Rai Lum is exceptionally biodiverse with the potential to provide additional and more beneficial ecosystem service contributions to local livelihoods. In addition, a comparison of the degree of existing species diversity and low level of utilization suggests that a wider variety and greater amount of NTFPs can be safely utilized and their overall benefit to those who rely on them expanded.
The community forest provides significant food security. Mushrooms, wild fruits, small animals, and edible plants are abundant. NTFPs provide more supplemental income to lower-income households which suggests that the forest has the capacity to improve rural livelihoods. A comparison of the forest conditions and the actual income from utilized NTFPs indicates that there is significantly greater income and benefit potential. To tap into this potential, the focus should be on promoting increased extraction and utilization of NTFPs by all households to supplement incomes.
There are relationships between different CFM factors and ecosystem services, the underlying behavior of the community in engaging in CFM, and their impact on ecosystem services. Moreover, our study provided evidence that CFM can improve provisioning, regulating, and cultural ecosystem services. Knowledge of these relationships can inform suitable strategies for this area and serve as an example of how to promote self-management of local forest resources toward sustainable CFM. However, employing forest patrols adversely affected regulating and cultural services, which lends credence to widespread beliefs that improving social capital through decentralized management (CFM) is important for improving forest ecosystem services and enhancing livelihoods.
This study, however, did not address opinions or levels of satisfaction regarding forest size, plant density, topography, the distance between the community and the forest, or other forest features. Future research could provide useful information regarding the relationship of these factors to effective forest management.  Data Availability Statement: Data is not publicly available. Access to the data may be granted upon request directed to the corresponding author.
Acknowledgments: Special thanks are extended to the Asian Forest Cooperation Organization (AFoCO) and the Royal Forest Department (RFD) for the opportunity to pursue this project and to the village leaders and people of Ban Mae Chiang Rai Lum, but for whose assistance this research would not have been possible.

Conflicts of Interest:
The authors declare no conflict of interest.

Appendix A Appendix A.1. Preliminary Community Survey
Before interviewing household representatives, multiple investigative visits over a year were made to the study area community in order to ascertain the organizational and procedural framework, activities, governance and enforcement practices, and other relevant aspects of community forest management in the study area. The following were identified:

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The existence of a governing forest management committee, members of which are all local people from the village; • Monthly meetings between the village heads, the community forest committee, and all households regarding village issues, including forest management; • Every household in the village is required to send a representative to the monthly meeting; • Input is solicited from everyone in attendance regarding forest plans, activities, regulations, enforcement of regulations, and all aspects of management; • The existence of a patrol group that meets regularly and is responsible for the enforcement of regulations; • Issues salient to the local people regarding the forest and ecosystem services.
Information garnered from the investigative visits was then used to develop the interview questionnaire for the data gathering process.
Appendix A.2. Summary of Interview Procedures and Questionnaire

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The following is a translation of the questions used by the primary author to gather data during the interview process. The primary author is of Thai nationality and all interviewees were also of Thai nationality. No translation of the questions was required during the data gathering process. No author of non-Thai nationality was involved in the interviews.

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The following list of questions attempts to accurately convey the meaning of the questions posed to the interviewees. The meaning of much of the Thai vocabulary in the original questionnaire, particularly technical vernacular, does not translate directly or easily into English. • Interviews were conducted without prior arrangement with the interviewees. Interviewees self-selected who would represent their household. Representatives were over the age of 18 and were household members who could report the demographics and the involvement in CFM, if any, of the household. • Names of the interviewees were kept confidential.

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One interview of each representative was conducted.

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The interviews were not recorded as no open-ended questions or questions seeking opinions were asked.

• Knowledge
A community forest is a forest from which local people can profit from forest products to meet their basic needs, and local people have the right to make decisions to manage their forest resources for sustainable forest management [141] True/False Community forest management is the decentralization of forest resource management, it transfers forest management power from the government to a local community [142] True/False Utilization of resources, community rules, community organizations and support from external organizations are factors key to the success of the management of the community forest [56] True/False Community forests provide environmental benefits, social benefits, and economic benefits by enhancing income, especially of the poor [19,143] True/False The Thai government has said that local communities should have the right to participate in the management, maintenance, preservation, and use of the natural resources and environment, including biological diversity, in a balanced, sustainable manner [22] True/False Experts have said that under the concept of sustainable forest resource management, the average harvest must not exceed the forest's productivity capacity. This will ensure the present and future availability of resources [144,145] True/False People can access NTFPs from a natural forest for subsistence, but commercial harvesting of NTFPs needs permission from the government [146] True/False There is no nationwide law controlling community forests in Thailand. Forest management is controlled by related forest laws which should be consistent with local regulations [147] True/False Setting forest fires for harvesting NTFPs may affect soil fertility, change the forest composition, and decrease ecosystem productivity [148] True/False Sharing the benefits from the biodiversity of community forests is fair and equitable [149] True/False • Benefit sharing How satisfied are you with the sharing of environmental benefits from the community forest? From 1 to 5 to plot on a Likert scale How satisfied are you with the sharing of social benefits from the community forest? From 1 to 5 to plot on a Likert scale How satisfied are you with the sharing of economic benefits from the community forest? From 1 to 5 to plot on a Likert scale