Characterizing the spatial pattern of marshlands in the Sanjiang Plain, Northeast China

Liu, Xiaohui; Dong, Guihua; Wang, Xigang; Xue, Zhenshan; Jiang, Ming; Lü, Xianguo; Zhang, Yuan

doi:10.1016/j.ecoleng.2012.12.071

Cited by 42 publications

(39 citation statements)

References 26 publications

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“…Since the founding of the People's Republic of China, reclamation has been an important reason for marshland loss and degradation [26], mainly because of the rapid increase of population and the concomitant requirement of grain [34]. Promoted by the policy of the agricultural modernization in the early 1980s, advanced agricultural machinery was introduced, and large modernized farms were built to produce more food [22]. Since 1992, the market-directed economic system has replaced the former planned economic system [80] when land reclamation was further enhanced.…”

Section: Processes Of Lulcc Over the Two Plains And Their Driving Forcesmentioning

confidence: 99%

“…However, characteristic analysis on the long-term LULCC over these two plains suggested the complexity and discrepancies of spatiotemporal variations between these two plains. Based on previous studies in the region [22,23,26,27,78] together with main findings of this study, LULCC in different periods were further analyzed with attempt to explore the primary driving forces for the LULCC over the region. It should be noted firstly that, given the availability of continuous long-term LULC observation with a unified classification system in the study region, we mainly focused on the period after the reform and opening-up policy in 1978.…”

Section: Processes Of Lulcc Over the Two Plains And Their Driving Forcesmentioning

confidence: 99%

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Climate Change and Anthropogenic Impacts on Wetland and Agriculture in the Songnen and Sanjiang Plain, Northeast China

et al. 2018

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Abstract:Influences of the increasing pressure of climate change and anthropogenic activities on wetlands ecosystems and agriculture are significant around the world. This paper assessed the spatiotemporal land use and land cover changes (LULCC), especially for conversion from marshland to other LULC types (e.g., croplands) over the Songnen and Sanjiang Plain (SNP and SJP), northeast China, during the past 35 years . The relative role of human activities and climatic changes in terms of their impacts on wetlands and agriculture dynamics were quantitatively distinguished and evaluated in different periods based on a seven-stage LULC dataset. Our results indicated that human activities, such as population expansion and socioeconomic development, and institutional policies related to wetlands and agriculture were the main driving forces for LULCC of the SJP and SNP during the past decades, while increasing contributions of climatic changes were also found. Furthermore, as few studies have identified which geographic regions are most at risk, how the future climate changes will spatially and temporally impact wetlands and agriculture, i.e., the suitability of wetlands and agriculture distributions under different future climate change scenarios, were predicted and analyzed using a habitat distribution model (Maxent) at the pixel-scale. The present findings can provide valuable references for policy makers on regional sustainability for food security, water resource rational management, agricultural planning and wetland protection as well as restoration of the region.

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Section: Processes Of Lulcc Over the Two Plains And Their Driving Forcesmentioning

confidence: 99%

Section: Processes Of Lulcc Over the Two Plains And Their Driving Forcesmentioning

confidence: 99%

Climate Change and Anthropogenic Impacts on Wetland and Agriculture in the Songnen and Sanjiang Plain, Northeast China

et al. 2018

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“…Promoted by the "Going to the Countryside and Settling in the Communes" policy, approximately 450,000 educated youth moved to Sanjiang Plain and participated in agricultural activities in the early 1970s [9,58]. From 1978 to 1985, advanced agricultural machinery was introduced by the "Agricultural Modernization" [62] policy, promoting large-scale reclamation. From 1992 to 1995, the policy of "to promote conversion from dry farmland to paddy" in northeast China promoted conversion of dry farmland to paddy [75,76].…”

Section: Discussionmentioning

confidence: 99%

“…Our study showed that human activities (89.67%) were the dominant factors responsible for land degradation in the study area. In Sanjiang Plain, the population increased from 1.40 million in the 1950s to 9.74 million in the 2010s [56,62], which accounts for the growth of farmland and settlement area. Several other studies have also shown that population growth is an important factor in LULC.…”

Section: Discussionmentioning

confidence: 99%

“…Meanwhile, climate change [60], elevated atmospheric CO2 [61], and other natural factors [59] have also caused some degree of land degradation in this region. Many studies [56][57][58]62,63] have examined spatiotemporal changes in land degradation and its driving factors over part or all of Sanjiang Plain. However, information on the land use structure changes and quantitative analysis of human impacts are still lacking for this area.…”

Section: Introductionmentioning

confidence: 99%

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The Effects of Spatiotemporal Changes in Land Degradation on Ecosystem Services Values in Sanjiang Plain, China

et al. 2016

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Sanjiang Plain has undergone dramatic land degradation since the 1950s, which has caused negative effects on ecosystems services and sustainability. In this study, we used trajectory analysis as well as the Lorenz curve, Gini coefficient and relative land use suitability index (R) to analyze spatiotemporal changes of land degradation from 1954 to 2013 and to make a preliminary estimation of the role of human activities in observed environmental changes using a five-stage LULC data. This study also explored the effect of land degradation on the values and structure of ecosystem services. Our results indicated that more than 70% of marsh area originally present in the study area has been lost, whereas less than 30% was preserved. Dry farmland and paddy increased rapidly at the expense of marsh, forest and grassland. Land use structure became more unsuitable during the past 60 years. Compared with natural factors, human activities played a dominant role (89.67%) in these changes. This dramatic land degradation caused the significant loss of ecosystem services values and the changes in the structure of ecosystem services. These results confirmed the effectiveness of combining temporal trajectory analysis, the Lorenz curve/Gini coefficient and the R index in analyzing spatiotemporal changes in progressive land degradation. Also, these findings highlight the necessity of separating dry farmland from paddy when studying land degradation changes and the effects on ecosystem services in regions where dry farmland has often been converted to paddy.

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Assessing the conservation effectiveness of wetland protected areas in Northeast China

Wang

et al. 2015

Wetlands Ecol Manage

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The evaluation of conservation effectiveness for wetland protected areas (WPAs) is essential to underpin knowledge-based conservation policies and funding decisions by government and managers. In this paper, the conservation effectiveness for 28 WPAs in Northeast China from 2000 to 2012 was quantitatively evaluated using landsat thematic mapper image data and a maximum entropy model (Maxent). The spatial distribution of conservation effectiveness and the influence of human activities on conservation effectiveness were determined by combining a landscape development intensity (LDI) index and spatial analysis in a geographical information system. The results showed that the natural wetland area of all WPAs in Northeast China declined by 11.5 % and the conservation effectiveness of most of these WPAs decreased between 2000 and 2012. A significant negative correlation between the LDI index and conservation effectiveness (r = -0.824, p \ 0.01) suggested that human activities were responsible for the low conservation effectiveness of WPAs. The WPAs with the high conservation effectiveness were mainly located in the Da-Xing'an and Xiao-Xing'an Mountains, where anthropogenic activities were limited. The reduction in the conservation effectiveness of WPAs in the Songnen and Sanjiang Plains, which showed the most degradation, was due to conversion of wetlands to croplands. This research offers an efficient and effective method to evaluate the conservation effectiveness of WPAs. The results of this study will inform future ecological conservation and management of WPAs in China.

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Characterizing the spatial pattern of marshlands in the Sanjiang Plain, Northeast China

Cited by 42 publications

References 26 publications

Climate Change and Anthropogenic Impacts on Wetland and Agriculture in the Songnen and Sanjiang Plain, Northeast China

Climate Change and Anthropogenic Impacts on Wetland and Agriculture in the Songnen and Sanjiang Plain, Northeast China

The Effects of Spatiotemporal Changes in Land Degradation on Ecosystem Services Values in Sanjiang Plain, China

Assessing the conservation effectiveness of wetland protected areas in Northeast China

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