Search Results (100)

Transitional waters—such as estuaries, lagoons, deltas, and coastal wetlands—are dynamic environments where freshwater and seawater interact, forming highly productive and biologically diverse ecosystems. Shaped by temperature and salinity gradients, tidal influence, sediment transport, and nutrient-rich conditions, these habitats support diverse ecological functions. Their structural complexity—including seagrass beds, salt marshes, mudflats, and mangroves—provides essential habitats for many fish species. These areas are crucial for fish life cycles, serving as nurseries, spawning grounds, feeding zones, and refuges from predators. Many commercially important species depend on them during early life stages before moving offshore, making them vital for both commercial and recreational fisheries. Beyond food provision, they deliver key ecosystem services, including water purification, coastal protection, and carbon storage. Research on the fish community of the Ria Formosa lagoon in Portugal since the 1980s highlights long-term changes in the fish community and the dominant role of habitat structure and temporal dynamics. Subtidal seagrass beds support higher fish abundance and diversity than unvegetated areas, acting as key nursery habitats and provide important fish provisioning services. Seasonal variation is also central, driven by recruitment pulses of marine migrants in late winter–spring. Recent pressures on this system have been driven by human activity and environmental change. Seagrass loss reduces nursery and feeding areas, while pollution degrades water quality. Overfishing (including illegal fishing), recreational activities, and aquaculture expansion add stress. Climate warming and invasive species such as Caulerpa prolifera, further disrupt ecosystem balance and threaten biodiversity. Sustainable management—such as habitat restoration, protected areas, and integrated policies—is essential to preserve the ecological and economic value of this unique lagoon. Ongoing research, monitoring, habitat restoration, and stakeholder engagement remain critical for ensuring resilience. Full article

Introduction: A diverse ichthyofauna is supported by the Lima River in northern Portugal. Despite its ecological significance, Ramsar-protected wetlands status and Natura 2000 site, the system remains among the least studied in the Iberian Peninsula. Objective: This study characterises the fish assemblage of the Lima River and some of its tributaries. It examines the composition and abundance of species, as well as key biological parameters, across the river’s freshwater and estuarine sections. Particular attention is given to the balance between native and exotic taxa, and to the threats facing the native ichthyofauna. Methodology: Between 2021 and 2023, 3242 individuals belonging to 15 species were sampled using fyke nets, trammel nets, and electrofishing at 13 sites along the river system. Results: Native species accounted for 51.1% of the total catch. This comprised resident freshwater taxa, such as Pseudochondrostoma duriense, Achondrostoma oligolepis, Luciobarbus bocagei, Squalius carolitertii, Cobitis atlantica, Gasterosteus aculeatus, and resident Salmo trutta, alongside diadromous species, namely Chelon ramada, Petromyzon marinus, Alosa spp., migrant Salmo trutta and Anguilla anguilla. Exotic species accounted for 48.9% of the total catch, with four non-native taxa being recorded: Lepomis gibbosus, Micropterus salmoides, Carassius auratus and Gobio lozanoi. This reflects the extent of the biological invasion pressure on this system. Analysis of the stomach contents of Salmo trutta revealed active predation of non-native species. Plastic debris was detected in 1.1% of Salmo trutta stomachs, which evidences that anthropogenic pollution has reached freshwater feeding habitats. The first recorded instance of the invasive nematode Anguillicola crassus in the Lima River, where 84.8% of the eels sampled exhibited moderate-to-severe swim bladder damage, highlights the vulnerability of native species to biological invasions. Conclusions: Biometric analyses and condition factors suggest that the fish community is under cumulative anthropogenic stress, caused by factors including river fragmentation due to three dams and traditional fishing weirs. The near-equal representation of native and exotic species in catches indicates that the freshwater fish community is under significant invasion pressure, which has direct consequences for the conservation of the native ichthyofauna. These findings establish a crucial baseline for the evidence-based management of an Iberian river system that is ecologically important but data-poor. Full article

While land development opportunities stemming from planning regulations demonstrably influence rural household income, quantitative evidence quantifying these effects remains limited. Measuring and decomposing these effects can empirically support territorial spatial planning policies aimed at alleviating associated regional development imbalances and advancing sustainable rural development. This study selects Wuhan’s Sino-French Eco-City (urban development zone) and Xiaosi Township (wetland conservation zone) as typical zones. Based on 573 randomly sampled rural households, we explore the effects of land development opportunities on rural household incomes and find that: (1) Land development opportunities for non-agricultural conversion in the urban development zone significantly increase rural households’ total income, wage income, though their corresponding contribution rates are limited. Endogenously accumulated endowments such as human capital and economic status dominate the formation of such income gaps. (2) Planning-induced land development opportunities yield coefficients of 1.0442 for local employment income and −0.4567 for agricultural business income, with both statistically significant at the 1% significance level. Decomposition results show their respective contribution rates of 70.68% and 86.77%, demonstrating that such opportunities primarily account for cross-regional rural household income gaps. (3) Whereas non-agricultural land development opportunities narrow disparities in households’ local employment income, they raise inequality in rural households’ migrant employment, business, property and transfer income. These growth and equality-enhancing effects on local wage income are particularly pronounced for households possessing high-quantity but low-quality human capital. This study recommends supporting protected zones via farmer vocational training, expanded rural public service expenditure, and a benefit-sharing mechanism that channels land development gains to ecological and agricultural regions to strengthen households’ endogenous development capacity. Full article

The digital economy is reshaping urban development and may contribute to more inclusive and sustainable cities. Using the 2016 and 2017 China Migrants Dynamic Survey (CMDS), this study constructs a city-level digital economy index covering digital industrialization, industrial digitization, and digital infrastructure, and examines its effects on migrants’ settlement intentions. The results show that the digital economy significantly promotes migrants’ settlement intentions, with digital industrialization as the primary driver. The positive effect is more robust for long-term settlement intention, whereas its association with hukou transfer intention is less stable. Heterogeneity analysis shows that the effect is stronger among women and highly educated migrants, but weaker among migrants with rural hukou. It is also more pronounced in cities with lower ecological quality and varies across regions and city sizes. Mechanism analysis suggests that the digital economy promotes settlement intentions mainly through social integration and income enhancement, thereby supporting more stable and sustainable urban living by facilitating migrants’ long-term integration into host cities. Digital industrialization plays a stronger role in the social integration channel, whereas industrial digitization is more strongly linked to income enhancement. These findings suggest that digital development can contribute to inclusive and sustainable urbanization in the digital era by improving employment quality, narrowing the digital divide, strengthening migrants’ social integration, and promoting more differentiated urban governance. Full article

This study examines a long-term dataset where 16 passerine species, classified as long-distance migrants, short-distance migrants, and residents were monitored at the Santo André National Ringing Station (Portugal) from 1997 to 2024. Using standardized capture data from 16 passerines species collected during the autumn migration period, we evaluated trends in population abundance over a 27-year time span. Our analyses revealed pronounced and statistically robust declines in all long-distance migratory species, particularly savi’s warbler, grasshopper warbler, and sedge warbler, which are now almost locally extinct. In contrast, short-distance migrants and resident species exhibited more heterogeneous patterns depending on their ecological specialization, yet all strictly insectivorous taxa, except for the chiffchaff, showed marked population declines, particularly the bluethroat and the sardinian warbler. The parallel decline in insectivorous species across migratory strategies points to a widespread trophic effect, likely linked to the global depletion of insect populations, driven by habitat destruction, pesticide use, pollution, and climate change. Collectively, these findings emphasize the urgent need for regionally adapted, long-term monitoring programs to inform effective conservation strategies in the face of accelerating climate and land-use change. Full article

This paper examines the critical role of youth engagement in building urban climate resilience in secondary cities of West Africa, with a specific focus on Bo City, Sierra Leone. As one of the world’s most climate-vulnerable countries, Sierra Leone faces significant challenges exacerbated in urban environments where infrastructure gaps, rapid population growth, climate migration, and limited resources intersect with intensifying climate impacts (rising temperature, extreme weather events, rising sea levels, and socio-economic health impacts). We describe a pathway to invest in the adaptive capacity of this community by developing and implementing a Youth Climate Science Hub designed to inform and empower secondary school students as future climate leaders. Drawing on theories of social–ecological resilience and transformative education, we analyze how youth-centered approaches can bridge the knowledge–action gap in urban climate adaptation. The initiative represents an innovative practice-based example for building resilience in secondary cities expected to receive climate migrants while demonstrating the power of youth mobilization in creating locally appropriate climate solutions. Full article

Women in resource-scarce communities navigate daily scarcity, structural neglect, and gendered violence, leaving profound but often invisible impacts on mental and reproductive health. Women play an active role in the Water–Energy–Food (WEF) space; they provide water, food, and household security daily. This study investigates how chronic deprivation across the WEF nexus shapes experiences of psychological distress, reproductive vulnerability, and social marginalization in South African settings: Lorentzville, a migrant urban informal settlement, and Mqanduli, a peri-urban Eastern Cape community. Using ethnographic methods, including in-depth interviews, focus group discussions, and participatory observation, and an analytical framework combining structural violence and feminist political ecology, we show that insecurity over water, energy, and food constrains reproductive autonomy, amplifies self-reported symptoms of anxiety and depression, and drives coping and adaptation strategies such as informal work, transactional sex, and fragile social support networks. These strategies, while mitigating immediate risks, cannot fully offset systemic harms. By foregrounding women’s lived experiences, this study extends the WEF nexus framework to include embodied, emotional, and reproductive dimensions, linking historical legacies of colonial and apartheid neglect to contemporary inequities. The findings offer critical insights for integrated health, social, and resource policy interventions that center on gender, care, and justice within environmental, wellbeing, and livelihood. Full article

This study examines the perceived mental health of Ukrainian female forced migrants in Ireland through the lens of the socio-ecological model (SEM). Using binomial logistic regression on a 2023 online survey dataset (N = 656), it explores multi-level predictors across individual, relationship, community, and societal domains. Results indicate that individual-level factors explain the largest proportion of variance in perceived mental health (Nagelkerke R² = 0.399). Employment status, self-rated physical health, and coping strategies were key determinants: part-time employment and good physical health were associated with higher odds of good perceived mental health. In contrast, avoidant coping and worsening health were associated with poorer outcomes. Relationship-level factors (R² = 0.194) also contributed significantly; lack of social support and deteriorating family or friendship ties were linked to poorer mental health, whereas participation in refugee meetings was strongly protective. Community-level factors (R² = 0.123) revealed that unstable housing, living with strangers, and declining neighbourhood relationships were associated with reduced mental well-being. At the societal level (R² = 0.168), insufficient access to psychological support and excessive exposure to Ukrainian news were associated with poorer outcomes, while moderate news engagement was protective. The findings highlight the multifaceted nature of refugees’ perceived mental health, emphasising the interdependence of personal resilience, social connectedness, and systemic support. Full article

Artificial light at night (ALAN) is altering nocturnal ecosystems. While the effects of direct light sources on insect behavior are well studied, the influence of large-scale skyglow on migratory orientation remains unclear. Here, we tested how skyglow-induced luminance gradients influence the flight orientation of the fall armyworm, Spodoptera frugiperda, a globally invasive nocturnal migrant that performs seasonal migration in China, using controlled indoor simulations and field assays. Surprisingly, individuals consistently oriented toward darker regions, suggesting that luminance gradients may influence their heading away from the expected seasonal migratory direction. This response was highly consistent across both settings, indicating that skyglow-generated luminance gradients can function as directional cues and potentially interfere with seasonal orientation processes. Such gradients may thus function as ecological traps and represent an underrecognized factor in nocturnal insect navigation. Our findings point to a previously overlooked pathway through which skyglow may affect long-distance orientation in nocturnal migrants, underscoring the need for further work to evaluate its ecological significance within light-polluted environments. Full article

The present study explores the role of food as a symbolic, material, and relational device in identity construction and community processes. This study draws on a qualitative case study of a community-based social restaurant located in a mid-sized city in central-northern Italy. The initiative’s objective is to promote the social and labor inclusion of migrant women through training and experiential programs. The research, conducted over a period of nine months from October 2024 to June 2025, was based on a participatory qualitative design, which integrated semi-structured interviews, ecological maps, photointervention, world café, and affective cartography, involving 35 participants including operators, trainees, local community members, and politicians. The results demonstrate the multifaceted role of food practices at the restaurant, which serve to strengthen internal relationships, regulate community life, construct intercultural narratives, and establish spaces of recognition and agency for the women involved. Moreover, the restaurant has been shown to have the capacity to influence the broader social representations of migration in the urban context, thereby promoting processes of cohesion and belonging. It is evident that food-related activities manifest as quotidian micro-political practices, which have the capacity to subvert stereotypes, recognize frequently unseen abilities, and generate new forms of inclusive citizenship. The present study underscores the transformative capacity of initiatives that employ food practices as innovative instruments for fostering empowerment; well-being; and social participation; through the third element of food. The limitations and future prospects of the present situation are discussed; with particular reference to the need to ensure continuity and institutional sustainability for similar experiences. Full article

Against the backdrop of global biodiversity crises and climate change, integrated forest management (IFM) has emerged as a critical pathway for sustainable forest development. Grounded in the social–ecological system (SES) framework, we examine the mechanisms and pathways through which knowledge transfer influences IFM, with a focus on residents in China’s state-owned forest regions in the Northeast. By constructing an IFM-SES theoretical framework and utilizing survey data, we employ OLS regression and mediation effect models to empirically assess the driving effects of knowledge transfer on IFM and its heterogeneous impacts. We show that: (a) community-based knowledge transfer significantly enhances IFM; (b) knowledge transfer indirectly promotes IFM by fostering collective action efficacy, strengthening institutional rule compliance, and optimizing conflict resolution mechanisms; and (c) heterogeneity analysis indicates that the impact of knowledge transfer varies across governance models, with stronger effects observed among local residents compared to migrants. This study provides theoretical insights for integrating traditional ecological knowledge with modern scientific management and offers empirical support for global forest sustainability policy design. Full article

During crisis situations like the COVID-19 pandemic, nonprofit organizations must rapidly adapt their community engagement approaches, yet traditional co-design methods often fall short in such time-sensitive, multi-stakeholder contexts. This paper examines how design methods need to evolve when working with nonprofits during crises by analyzing our intensive six-month collaboration with five Australian nonprofits serving migrant youth communities. Through Action Research involving over 130 co-design sessions, workshops, and stakeholder meetings, we developed and iteratively refined a social media engagement playbook. Our findings reveal three key methodological innovations: (1) adapting co-design methods for crisis contexts through flexible, asynchronous engagement; (2) managing multiple stakeholder relationships through what we term “nonprofit ecologies”—understanding organizations’ overlapping roles and relationships—and (3) balancing immediate needs with long-term goals through infrastructuring approaches that build sustainable capacity. This research contributes practical methods for conducting collaborative design during crises while advancing a theoretical understanding of how traditional design approaches must adapt to support nonprofits in complex, time-sensitive situations. Full article

Cooperative breeding, or helping behavior, has long been recognized in birds. An ignored dichotomy, however, separates the helping found in many individuals of some long-lived, sedentary species from the helping occasionally found in the territories of isolated breeding pairs of some short-lived, long-distance migrant species. Both types of helping are called “cooperative breeding” in the literature. However, recognizing a dichotomy of “frequent” versus “infrequent” cooperative breeding would help justify the study of infrequent helping as a distinct discipline. Cooperative breeding in Wilson’s Warblers is infrequent, and among the unique behaviors found during this study were (1) solicitations by helper males, which aborted host male attacks and apparently initiated territorial acceptance, (2) an absence of sexual aggression between helper males and fertile host females, (3) attacks by helper males on intruding males during host female nest building, (4) helper males singing with impunity when host males were absent from territories, but being attacked when host males were present, and (5) a single male simultaneously serving as a helper in four adjacent host territories. Infrequent helping has essentially been ignored in studies and summaries of cooperative breeding. However, recognizing and studying infrequent helping as a distinct behavioral process could reveal interactions between helping and population ecology. Thus, infrequent cooperative breeding detected in a breeding population could reveal territorial saturation and could indicate that the population is likely ecologically healthy. Full article

China has entered an era of population decline, yet urbanization continues as rural-to-urban migration persists. This demographic transition has prompted a strategic shift in urban development from extensive spatial expansion toward quality-oriented, intensive growth models. However, evolving human–land supply–demand dynamics in cities historically characterized by population inflows remain insufficiently understood. This study focuses on Xiamen, a prototypical coastal migrant-receiving city, to investigate land use simulation under demographic transition. By integrating the cohort-component method with the Patch-generating Land Use Simulation (PLUS) model, we project Xiamen’s population under three scenarios by 2030: Stable Continuation (SCS), Natural Development (NDS), and National 2030 Population Planning (NPP), with projected increases of 5.56%, 6.76%, and 24.69%, respectively. Results show continued but decelerating population growth, with adequate labor supply and persistent demographic dividend. Notably, the NPP scenario reveals a negative correlation between population growth and construction land expansion. In NPP-High, prioritizing compact development and ecological conservation, population grows by 1.27 million while construction land decreases by 2.85% and forest land increases by 4.09%. This framework provides empirical evidence for compact urban development under the dual constraints of land-use efficiency and ecological protection. Full article

Eco-migration (EM) constitutes a specialized form of migration aimed at enhancing living environments and alleviating ecological pressure. Nevertheless, large-scale external migration has intensified habitat fragmentation (HF) in resettlement areas. This paper takes the Shule River Resettlement Project (SRRP) as a case, based on the China Land Cover Dataset (CLCD) data of the resettlement area from 1996 to 2020, using the Landscape Pattern Index (LPI) and the land use transfer matrix (LTM) to clearly define the stages of migration and the types of resettlement areas and to quantitative explore how EM affects HF. The results show that (1) EM accelerates the transformation of natural habitats (NHs) to artificial habitats (AHs) and shows the characteristics of sudden changes in the initial stage (1996–2002), with stability in the middle stage (2002–2006) and late stage (2007–2010) and dramatic changes in the post-migration stage (2011–2020). In IS, MS, LS, and PS, AH increased by 26.145 km², 21.573 km², 22.656 km², and 16.983 km², respectively, while NH changed by 73.116 km², −21.575 km², −22.655 km², −121.82 km², and −213.454 km², respectively. The more dispersed the resettlement areas are the more obvious the expansion of AH will be, indicating that the resettlement methods for migrants have a significant effect on habitat changes. (2) During the resettlement process, the total number of plaques (NP), edge density (ED), diversity (SHDI), and dominance index (SHEI) all continued to increase, while the contagion index (C) and aggregation index (AI) continued to decline, indicating that the habitat is transforming towards fragmentation, diversification, and complexity. Compared with large-scale migration bases (LMBs), both small-scale migration bases (SMBs), and scattered migration settlement points (SMSPs) exhibit a higher degree of HF, which reflects how the scale of migration influences the extent of habitat fragmentation. While NHs are experiencing increasing fragmentation, AHs tend to show a decreasing trend in fragmentation. Ecological migrants play a dual role: they contribute to the alteration and fragmentation of natural habitat patterns, while simultaneously promoting the formation and continuity of artificial habitat structures. This study offers valuable practical insights and cautionary lessons for the resettlement of ecological migrants. Full article