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| 1 | Variations in net primary productivity and its relationships with warming climate in the permafrost zone of the Tibetan Plateau显示文摘温暖的气候触发的永久冻土降级处于土壤条件导致重要变化,并且进一步在植被上贡献明显的影响。然而,更不在网里关于差别被知道主要生产率(NPP ) 和在在不同植被类型和西藏的高原上的永久冻土地区的各种各样的类型之中的 NPP 和温暖的温度之间的关系。因而,遥远地察觉到陆地表面温度(LST ) 和从 MODIS 站台的 NPP 被用来调查植被 NPP 的反应到温暖气候,并且关联为学习区域被扩大规模。我们的结果从西方显示了 NPP 的著名增加到东方,并且显著地在西藏的高原的永久冻土地区从 2000 ~ 2010 与增加的 LST 一起增加了年度 NPP。同时,为各种各样的植被类型并且在有与温暖温度的关系的永久冻土地区的不同类型的增加的 NPP 被揭示。在连续永久冻土地区的 NPP 有最大的敏感到变化 LST,并且森林 NPP 介绍了最明显的反应。在在各种各样的规模的 NPP 和 LST 之间的积极关联显示了在西藏的高原的永久冻土地区在植被碳隐遁上温暖 LST 的提高的效果。鉴于到在这个高原上温暖温度的 NPP 的著名反应,进一步的遥感需要采用了在植被上揭示永久冻土降级和它的相关效果的地位。 | MAO Dehua LUO Ling WANG Zongming ZHANG Chunhua REN Chunying | 2015 | Journal of Geographical Sciences2015，25，8： | 18 |
| 2 | Remote Monitoring of Expansion of Aquaculture Ponds Along Coastal Region of the Yellow River Delta from 1983 to 2015显示文摘Aquaculture ponds are one of the fastest-growing land use types in valuable and fertile coastal areas and have caused serious environmental problems. Quantitative assessment of the extent, spatial distribution, and dynamics of aquaculture ponds is of utmost importance for sustainable economic development and scientific management of land and water resources in the coastal area. An object-oriented classification approach was applied to Landsat images acquired over three decades to investigate the long-term change of aquaculture ponds in the coastal region of the Yellow River Delta. The results indicated that the aquaculture ponds in the study area undergone a sharp expansion from 40.38 km^2 in 1983 to 1406.89 km^2 in 2015, and the fast expansion occurred during the period of 2010–2015 and 1990–2000. Natural wetlands, especially mudflat, and cropland were main land use types contributing to the increase of aquaculture ponds. The patches of aquaculture ponds were consequently prevalence in the north of the Yellow River Estuary and landscape metrics indicated an increase of the aquaculture ponds of the study area in the quantity and complexity. The expansion of aquaculture ponds inevitably had negative effects on the coastal environment, including loss of natural wetlands, water pollution and land subsidence, etc. The results from this study provide baseline data and valuable information for efficiently planning and managing aquaculture practices and for effectively implementing adequate regulations and protection measures. | REN Chunying WANG Zongming ZHANG Bai LI Lin CHEN Lin SONG Kaishan JIA Mingming | 2018 | Chinese Geographical Science2018，28，3： | 18 |
| 3 | Examining Forest Net Primary Productivity Dynamics and Driving Forces in Northeastern China During 1982–2010显示文摘Forest net primary productivity(NPP) is a key parameter for forest monitoring and management. In this study, monthly and annual forest NPP in the northeastern China from 1982 to 2010 were simulated by using Carnegie-Ames-Stanford Approach(CASA) model with normalized difference vegetation index(NDVI) sequences derived from Advanced Very High Resolution Radiometer(AVHRR) Global Inventory Modeling and Mapping Studies(GIMMS) and Terra Moderate Resolution Imaging Spectroradiometer(MODIS) products. To address the problem of data inconsistency between AVHRR and MODIS data, a per-pixel unary linear regression model based on least squares method was developed to derive the monthly NDVI sequences. Results suggest that estimated forest NPP has mean relative error of 18.97% compared to observed NPP from forest inventory. Forest NPP in the northeastern China increased significantly during the twenty-nine years. The results of seasonal dynamic show that more clear increasing trend of forest NPP occurred in spring and autumn. This study also examined the relationship between forest NPP and its driving forces including the climatic and anthropogenic factors. In spring and winter, temperature played the most pivotal role in forest NPP. In autumn, precipitation acted as the most important factor affecting forest NPP, while solar radiation played the most important role in the summer. Evaportranspiration had a close correlation with NPP for coniferous forest, mixed coniferous broadleaved forest, and broadleaved deciduous forest. Spatially, forest NPP in the Da Hinggan Mountains was more sensitive to climatic changes than in the other ecological functional regions. In addition to climatic change, the degradation and improvement of forests had important effects on forest NPP. Results in this study are helpful for understanding the regional carbon sequestration and can enrich the cases for the monitoring of vegetation during long time series. | MAO Dehua WANG Zongming WU Changshan SONG Kaishan REN Chunying | 2014 | Chinese Geographical Science2014，24，6： | 16 |
| 4 | Spatiotemporal Dynamics of Coastal Wetlands and Reclamation in the Yangtze Estuary During Past 50 Years(1960s–2015)显示文摘Reclamation is one of the fastest-growing land use type developed in coastal areas and has caused degradation and loss of coastal wetlands as well as serious environmental problems. This paper was aimed at monitoring the spatiotemporal patterns of coastal wetlands and reclamation in the Yangtze Estuary during the 1960s and 2015. Satellite images obtained from 1980 to 2015 and topography maps of the 1960 s were employed to extract changes of reclamation and coastal wetlands. Area-weight centroids were calculated to identify the movement trend of reclamation and coastal wetlands. The results show that from the 1960 s to 2015, the net area of natural wetlands declined by 574.3 km^2, while man-made wetlands and reclamation increased by 553.6 and 543.9 km^2, respectively. During the five study phases, the fastest areal change rate natural wetlands was –13.3 km^2/yr in the period of 1990–2000, and that of man-made areas was 24.7 km^2/yr in the same period, and the areal change rate of reclamation was 27.6 km^2/yr in the period of 2000–2010. Conversion of coastal wetlands mainly occurred in the Chongming Island, Changshu City and the east coast of Shanghai Municipality. Reclamation was common across coastal areas, and was mainly attributed to settlement and man-made wetlands in the Chongming Island, Lianyungang City and the east coast of Shanghai Municipality. Natural wetlands turned into farmlands and settlement, and man-made wetlands gained from reclamation of farmlands. The centroid of natural wetlands generally moved towards the sea, man-made wetlands expanded equally in all directions and inland, and the centroid of reclamation migrated toward Shanghai Municipality. Sea level rise, erosion-deposition changes, and reclamation activities together determine the dynamics of the Yangtze Estuary wetlands. However, reclamation activities for construction of ports, industries and aquaculture are the key causes for the dynamics. The results from this study on the dynamics of coastal wetlands and reclamation are valuable for local government to put forward sustainable land use and land development plans. | CHEN Lin REN Chunying ZHANG Bai LI Lin WANG Zongming SONG Kaishan | 2018 | Chinese Geographical Science2018，28，3： | 12 |
| 5 | Land Use Changes in Northeast China Driven by Human Activities and Climatic Variation显示文摘Human-induced land use/cover change (LUCC) forms an important component of global environmental change. Therefore, it is important to study land use/cover and its change at local, regional and global scales. In this paper we conducted the study of land use change in Northeast China, one of the most important agricultural zones of the nation. From 1986 to 2000, according to the study results obtained from Landsat images, widespread changes in land use/cover took place in the study area. Grassland, marsh, water body and woodland decreased by 9864, 3973, 1367 and 10,052km2, respectively. By comparison, paddy field, dry farmland, and built-up land expanded by 7339, 17193 and 700km2, respectively. Those changes bore an interactive relationship with the environment, especially climate change. On the one hand, climate warming created a potential environment for grassland and marsh to be changed to farmland as more crops could thrive in the warmer climate, and for dry farmland to paddy field. On the other hand, the changed surface cover modified the local climate. Those changes, in turn, have adversely influenced the local environment by accelerating land degradation. In terms of socio-economic driving forces, population augment, regional economic development, and national and provincial policies were confirmed as main driving factors for land use change. | WANG Zongming LIU Zhiming SONG Kaishan ZHANG Bai ZHANG Sumei LIU Dianwei REN Chunying YANG Fei | 2009 | Chinese Geographical Science2009，19，3： | 10 |
| 6 | Impact of land use/land cover changes on ecosystem services in the Nenjiang River Basin, Northeast China显示文摘Introduction:The Nenjiang River Basin is an important foodstuff base and eco-environmental fragile area in Northeast China.With the rapid rise in human population,human-induced changes in land use/land cover form an important component of regional environment and ecosystem service change.At the local and regional level,the ecosystem service concept can act as a decision support tool for a stakeholder to reach sustainable land use management.However,the prevailing ecosystem service evaluation would produce a biggish warp when it is applied to concrete area.So,it is essential to evaluate ecosystem service change according to the local actuality.Method:According to 1:250,000 land use/land cover maps of China and the adjusted equivalent value per unit area of ecosystem services in the Nenjiang River Basin,we evaluated the ecosystem service change of the river basin from 1980 to 2005.Results:The forest and wetland,which are mainly located in the upstream mountainous area of the Nenjiang River Basin,were the two valuable land cover types,accounting for more than three quarters of the total ecosystem service value of the river basin.As for individual ecosystem service,besides the food production,all of the ecosystem service values declined from 1980 to 2005.The total decline of 2.43 billion USD was mainly due to the cultivation of grassland(14.34%of the area in 1980)and wetland(4.62%of the area in 1980)in the downstream plain.Conclusions:Due to the increase in population and the concomitant requirement of grain,the inconsistency between decision-making at the macro-level,and the objective of agricultural production at the micro-level,cultivated land was increased through zealous reclamation of grassland,marginal woodland,and even fallow land.Tremendous land use/land cover changes had caused great damages to the ecological environment such as land degradation and ecosystem service recession.So,the policies of the Grain for Green and Construction of Ecological Province projects should be well-implemented to optimize land use/land cover. | Zhiliang Wang Zongming Wang Bai Zhang Chunyan Lu Chunying Ren | 2015 | Ecological Processes2015，4，1： | 5 |
| 7 | Integrating AVHRR and MODIS data to monitor NDVI changes and their relationships with climatic parameters in Northeast China显示文摘 | Dehua Mao Zongming Wang Ling Luo Chunying Ren | 2011 | International Journal of Applied Earth Observations and Geoinformation2011，，： | 2 |
| 8 | MicroRNA-101 Inhibited Postinfarct Cardiac Fibrosis and Improved Left Ventricular Compliance via the FBJ Osteosarcoma Oncogene/Transforming Growth Factor-β1 Pathway显示文摘 | Zhenwei Pan Xuelin Sun Hongli Shan Ning Wang Jinghao Wang Jinshuai Ren Shuya Feng Liangjun Xie Chunying Lu Ye Yuan Yang Zhang Ying Wang Yanjie Lu Baofeng Yang | 2012 | Circulation2012，，7： | 2 |
| 9 | Set pair three-way overlapping community discovery algorithm for weighted social internet of things显示文摘There are many problems in Social Internet of Things(IoTs),such as complex topology information,different degree of association between nodes and overlapping communities.The idea of set pair information grain computing and clustering is introduced to solve the above problems so as to accurately describe the similarity between nodes and fully explore the multi-community structure.A Set Pair Three-Way Overlapping Community Discovery Algorithm for Weighted Social Internet of Things(WSIoT-SPTOCD)is proposed.In the local network structure,which fully considers the topological information between nodes,the set pair connection degree is used to analyze the identity,difference and reverse of neighbor nodes.The similarity degree of different neighbor nodes is defined from network edge weight and node degree,and the similarity measurement method of set pair between nodes based on the local information structure is proposed.According to the number of nodes'neighbors and the connection degree of adjacent edges,the clustering intensity of nodes is defined,and an improved algorithm for initial value selection of k-means is proposed.The nodes are allocated according to the set pair similarity between nodes and different communities.Three-way community structures composed of a positive domain,boundary domain and negative domain are generated iteratively.Next,the overlapping node set is generated according to the calculation results of community node membership.Finally,experiments are carried out on artificial networks and real networks.The results show that WSIoT-SPTOCD performs well in terms of standardized mutual information,overlapping community modularity and F1. | Chunying Zhang Jing Ren Lu Liu Shouyue Liu Xiaoqi Li Liya Wang | 2023 | Digital Communications and Networks2023，9，1： | 1 |
| 10 | Shrinkage and fragmentation of marshes in the West Songnen Plain, China, from 1954 to 2008 and its possible causes显示文摘 | Zongming Wang Ni Huang Ling Luo Xiaoyan Li Chunying Ren Kaishan Song Jing Ming Chen | 2010 | International Journal of Applied Earth Observations and Geoinformation2010，，3： | 1 |
| 11 | Alternative Fuzzy Cluster Segmentation of Remote Sensing Images Based on Adaptive Genetic Algorithm显示文摘Remote sensing image segmentation is the basis of image understanding and analysis. However,the precision and the speed of segmentation can not meet the need of image analysis,due to strong uncertainty and rich texture details of remote sensing images. We proposed a new segmentation method based on Adaptive Genetic Algorithm(AGA) and Alternative Fuzzy C-Means(AFCM) . Segmentation thresholds were identified by AGA. Then the image was segmented by AFCM. The results indicate that the precision and the speed of segmentation have been greatly increased,and the accuracy of threshold selection is much higher compared with traditional Otsu and Fuzzy C-Means(FCM) segmentation methods. The segmentation results also show that multi-thresholds segmentation has been achieved by combining AGA with AFCM. | WANG Jing TANG Jilong LIU Jibin REN Chunying LIU Xiangnan FENG Jiang | 2009 | Chinese Geographical Science2009，19，1： | 1 |
| 12 | A GIS-based Tupu Analysis of Dynamics of Saline-alkali Land in Western Jilin Province显示文摘Based on Tupu theory, this paper studied the dynamic changes, conversion modes, expansion intensity and landscape attributes of the saline-alkali lands in Changling County, Zhenlai County and Da'an City of the western Jilin Province in 1980-2000 with the help of GIS. The results show that the saline-alkali land rather sharply increased in Da'an during 1995-2000; the main conversion processes in the three counties were from grassland to saline-alkali land and from saline-alkali land to grassland; and the typical shapes, spatial expansion speed and mode, and landscape attributes of the saline-alkali land were different in the three counties, which were closely related to local topography, predominant wind orientation, water resources distribution, etc. The corresponding spatial expansion mode was marginality in Changling, random in Zhenlai and more kernels in Da'an, respectively. Landscape attributes also responded to the spatial-temporal dynamic changes of the saline-alkali land and the landscape indices of Da'an fluctuated greatly. The frame of this research may provide fundamental reference for landscape analysis and give some suggestions for regional sustainable development. | REN Chunying ZHANG Bai WANG Zongming SONG Kaishan LIU Dianwei LIU Zhiming | 2007 | Chinese Geographical Science2007，17，4： | 1 |
| 13 | Integrating AVHRR and MODIS data to monitor NDVI changes and their relationships with climatic parameters in Northeast China显示文摘 | Dehua Mao Zongming Wang Ling Luo Chunying Ren | 2011 | International Journal of Applied Earth Observations and Geoinformation2011，，： | 1 |
| 14 | Shrinkage and fragmentation of grasslands in the West Songnen Plain, China显示文摘 | Zongming Wang Kaishan Song Bai Zhang Dianwei Liu Chunying Ren Ling Luo Ting Yang Ni Huang Liangjun Hu Haijun Yang Zhiming Liu | 2008 | Agriculture, Ecosystems and Environment2008，，1： | 1 |
| 15 | Climate Change Impacts on Agroecosystems in China:Processes,Mechanisms and Prospects显示文摘Building a more resilient response system to climate change for sustainable development and reducing uncertainty in China’s food markets,requires access to historical research gaps and mapping future research progress for decision making.However,the lack of quantitative and objective analyses to ensure the stability and development of agroecosystems increases the complexity of agro-climatic mechanisms,which leads to uncertainty and undesirable consequences.In this paper,we review the characteristics of climate change in China(1951–2020),reveal the mechanisms of agroecosystem structure in response to climate,and identify challenges and opportunities for future efforts in the context of research progress.The aim is to improve the scientific validity and relevance of future research by clarifying agro-climatic response mechanisms.The results show that surface temperature,precipitation,and frequency of extreme weather events have increased to varying degrees in major agricultural regions of China in 1951–2020.And they have strong geographic variation,which has resulted in droughts in the north and floods in the south.Moreover,climate change has complicated the mechanisms of soil moisture,Net Primary Productivity(NPP),soil carbon pool,and crop pest structure in agroecosystems.This lends to a reduction in soil water holding capacity,NPP,soil carbon content,and the number of natural enemies of diseases and insects,which in turn affects crop yields.However,human interventions can mitigate the deterioration of these factors.We have also realized that the methodology and theory of historical research poses a great challenge to future agroecosystem.Historical and projected climate trends identified current gaps in interdisciplinary integration and multidisciplinary research required to manage diverse spatio-temporal climate change impacts on agroecosystems.Future efforts should highlight integrated management and decision making,multidisciplinary big data coupling,and numerical simulations to ensure sustainable agricultural development,ecological security,and food security in China. | BAO Lun YU Lingxue LI Ying YAN Fengqin LYNE Vincent REN Chunying | 2023 | Chinese Geographical Science2023，33，4： | 0 |
| 16 | Distribution and depositional model of microbial carbonates in the Ordovician middle assemblage,Ordos Basin,NW China显示文摘Based on outcrop profiles,drilling cores,cast thin sections etc.,the types,microfacies combinations and distribution pattern of microbial carbonates in the Ordovician middle assemblage of the mid-eastern Ordos Basin have been systematically analyzed.The middle assemblage of Ordovician in the mid-eastern Ordos Basin has microbial carbonates formed by the calci-fication of cyanobacteria,including microbial biostromes and microbial mounds made of stromatolites,thrombolites,and on-colites.The distribution of the carbonates shows obvious“stratum-control”and“regional”characteristics.The microbial bio-stromes 2–3 m thick each are controlled by sequence cycles and sedimentary facies changes,and were mainly formed in the tidal flat environment during the depositional stages of the Ma56 and Ma55 sub-members.The microbial biostrome in the Ma55 sub-member occurring near the carbonate-evaporite transition interface in the early stage of the transgression is distributed mainly in the Mizhi subsag in the eastern part of the basin;the microbial biostrome in the Ma56 sub-member turns up near the carbonate-evoporite transition zone in ring shape in the east of the central uplift.The ancient landform had noticeable control on the distribution of microbial mounds.The microbial mounds or mound-shoal complexes developing mainly during the de-positional stages of Ma57_Ma510 sub-members are about 15–25 m thick in single layer and distributed largely in the Wushenqi-Jingbian paleouplift.The development model of the microbial carbonate rocks shows that the carbonate-evaporite lithologic transition zone and the Wushenqi-Jingbian paleouplift are favorable exploration zones of microbial carbonates in the Ordovician middle assemblages. | WEI Liubin ZHAO Junxing SU Zhongtang WEI Xinshan REN Junfeng HUANG Zhengliang WU Chunying | 2021 | Petroleum Exploration and Development2021，48，6： | 0 |
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