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5 articles matched your search query. Search Parameters:
Authors = Jianchu Xu

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JIANCHU (6) , XU (2865)

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Open AccessArticle Adoption of Sustainable Land Uses in Post-Soviet Central Asia: The Case for Agroforestry
Sustainability 2016, 8(10), 1030; doi:10.3390/su8101030
Received: 14 June 2016 / Revised: 5 October 2016 / Accepted: 7 October 2016 / Published: 14 October 2016
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Abstract
We examine constraints and opportunities to enhance adoption of agroforestry for ecosystem and livelihood improvement in post-Soviet economies, using Central Asian countries as examples. Using a coevolutionary socio-ecological systems framework, we describe how development efforts, especially agricultural policies, under centrally planned regimes and
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We examine constraints and opportunities to enhance adoption of agroforestry for ecosystem and livelihood improvement in post-Soviet economies, using Central Asian countries as examples. Using a coevolutionary socio-ecological systems framework, we describe how development efforts, especially agricultural policies, under centrally planned regimes and under transition to market economies have changed environmental conditions, and how they affect peoples’ welfare. We then discuss agroforestry as a sustainable land use practice to address these issues. We present regional-specific and -suitable agroforestry practices, and discuss their potential. We found that legacies from the previous period of central planning shape current land uses, institutions, infrastructure and decisions of farmers, and constrain development of agroforestry. By identifying opportunities and constraints of agroforestry, we provide recommendations for enhancing the use of agroforestry in Central Asia. Full article
(This article belongs to the Section Social Ecology and Sustainability)
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Open AccessArticle Processes Underlying 50 Years of Local Forest-Cover Change in Yunnan, China
Forests 2014, 5(12), 3257-3273; doi:10.3390/f5123257
Received: 25 September 2014 / Revised: 5 December 2014 / Accepted: 11 December 2014 / Published: 16 December 2014
Cited by 7 | Viewed by 1470 | PDF Full-text (1021 KB) | HTML Full-text | XML Full-text
Abstract
Recognition of the importance of forests for local livelihoods, biodiversity and the climate system has spurred a growing interest in understanding the factors that drive forest-cover change. Forest transitions, the change from net deforestation to net reforestation, may follow different pathways depending on
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Recognition of the importance of forests for local livelihoods, biodiversity and the climate system has spurred a growing interest in understanding the factors that drive forest-cover change. Forest transitions, the change from net deforestation to net reforestation, may follow different pathways depending on a complex interplay of driving forces. However, most studies on forest transitions focus on the national level rather than the local level. Here, case studies from 10 villages in Yunnan, China, are used to clarify the complex interactions among various pathways of forest transitions, derive insights on the underlying drivers that shaped the forest transitions, and determine the importance of changes in drivers over time. The results demonstrate that China’s recent forest transition was caused by a range of interrelated pathways that were mediated by local circumstances. The degradation of forest ecosystem services caused by rampant deforestation and forest degradation created a scarcity of forest products and triggered state-initiated afforestation efforts, particularly in the 1990s, which continue to be important. More recently, economic development concomitant with smallholder intensification spurred reforestation, while the importance of state forest policy declined. The complexity of local land-use changes demonstrates the difficulty of identifying distinct transition pathways and calls for a more diverse approach that recognizes the interdependence of local processes. Full article
Open AccessArticle Characterization of Drought Development through Remote Sensing: A Case Study in Central Yunnan, China
Remote Sens. 2014, 6(6), 4998-5018; doi:10.3390/rs6064998
Received: 18 February 2014 / Revised: 19 May 2014 / Accepted: 19 May 2014 / Published: 30 May 2014
Cited by 15 | Viewed by 2550 | PDF Full-text (695 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
This study assesses the applicability of remote sensing data for retrieval of key drought indicators including the degree of moisture deficiency, drought duration and areal extent of drought within different land cover types across the landscape. A Normalized Vegetation Supply Water Index (NVSWI)
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This study assesses the applicability of remote sensing data for retrieval of key drought indicators including the degree of moisture deficiency, drought duration and areal extent of drought within different land cover types across the landscape. A Normalized Vegetation Supply Water Index (NVSWI) is devised, combining remotely sensed climate data to retrieve key drought indicators over different vegetation cover types and a lag-time relationship is established based on preceding rainfall. The results indicate that during the major drought event of spring 2010, Evergreen Forest (EF) experienced severe dry conditions for 48 days fewer than Cropland (CL) and Shrubland (SL). Testing of vegetation response to drought conditions with different lag-time periods since the last rainfall indicated a highest correlation for CL and SL with the 4th lag period (i.e., 64 days) whereas EF exhibited maximum correlation with the 5th lag period (i.e., 80 days). Evergreen Forest, which includes tree crops, appears to act as a green reservoir of water, and is more resistant than CL and SL to drought due to its water retention capacity with deeper roots to tap sub-surface water. Identifying differences in rainfall lag-time relationships among land cover types using a remote sensing-based integrated drought index enables more accurate drought prediction, and can thus assist in the development of more specific drought adaptation strategies. Full article
(This article belongs to the Special Issue Remote Sensing of Land Degradation in Drylands)
Open AccessArticle Local Dynamics Driving Forest Transition: Insights from Upland Villages in Southwest China
Forests 2014, 5(2), 214-233; doi:10.3390/f5020214
Received: 31 October 2013 / Revised: 13 December 2013 / Accepted: 16 January 2014 / Published: 23 January 2014
Cited by 16 | Viewed by 2013 | PDF Full-text (1233 KB) | HTML Full-text | XML Full-text
Abstract
China has experienced extensive forest transition, from net deforestation to net forestation. Existing theories have highlighted economic growth, the intensification of agriculture and forest scarcity as the pathways of this transition, and studies, in particular from China, have also highlighted the contribution of
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China has experienced extensive forest transition, from net deforestation to net forestation. Existing theories have highlighted economic growth, the intensification of agriculture and forest scarcity as the pathways of this transition, and studies, in particular from China, have also highlighted the contribution of a huge state afforestation program and the improved implementation and enforcement of forest protection policy and law. However, few studies have paid attention to local dynamics to provide a contextualized understanding of how forest transition has taken place at the local level and the significance of local factors in this change. This paper examines forest transition pathways in two villages in China. We consider the historical perspective and compare their local dynamics and variations to reach an understanding of the process of forest recovery at the local level. The results show that state forestry policies, including afforestation policy and tenure reform, arguably contribute to forest increase, while local processes including livelihood change and institutional factors play a key role in driving and shaping forest transition. We argue that there is a need for local-level studies and recommend including local institutions in forest transition analysis, contextualizing the socio-ecological interactions within the broader concept of political economy. Full article
Open AccessArticle Deforestation and Changes in Landscape Patterns from 1979 to 2006 in Suan County, DPR Korea
Forests 2013, 4(4), 968-983; doi:10.3390/f4040968
Received: 12 August 2013 / Revised: 13 September 2013 / Accepted: 5 November 2013 / Published: 13 November 2013
Cited by 6 | Viewed by 2049 | PDF Full-text (2467 KB) | HTML Full-text | XML Full-text
Abstract
The Democratic People’s Republic of Korea (DPR Korea) suffered considerable upland deforestation during the 1990s, yet its consequences remain relatively unknown. This paper examines this deforestation and resulting land-use change patterns by analysis of Landsat satellite images from 1979, 1992, 2001 and 2006
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The Democratic People’s Republic of Korea (DPR Korea) suffered considerable upland deforestation during the 1990s, yet its consequences remain relatively unknown. This paper examines this deforestation and resulting land-use change patterns by analysis of Landsat satellite images from 1979, 1992, 2001 and 2006 in Suan County, Hwanghae Province, DPR Korea. Results show that there has been significant closed canopy forest loss and a dramatic expansion of agricultural land during this period. Most forestlands were converted to farmland during 1992 and 2001. Food shortages, along with fuelwood and timber extraction, are considered to be the main drivers of deforestation. Landscape analysis also showed that closed canopy forests have been severely fragmented and degraded. These research findings make a contribution to an insufficient body of literature on environmental issues in DPR Korea and helps to establish a baseline for monitoring land-use and land-cover changes in the country. Full article

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