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Planning conservation corridors in mountain areas based on integrated conservation planning models: A case study for a giant panda in the Qionglai Mountains

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Journal of Mountain Science 2019年第11期16卷 2654-2662页

作者： lu ya-feng Li Qin-wen WANG Yu-kuan XU Pei Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 100049China

With the accelerated urbanization,human activities pose serious threats to species because of *** conservation corridors between habitats could improve species mobility in order to address the human ***,there are a limited number of studies that focus on assessing the effect of human activities on species movement in mountain areas as well as how to integrate different conservation models relating to conservation corridors *** our study,we modified the resistance model and took land use data as input parameters to quantify the impacts of human activities in mountain ***,different conservation planning models,including Circuit model and Least Cost Path(LCP)algorithm,were ***,our approach was applied to identify giant panda corridors in Miarro nature reserve,Caopo nature reserve,and Wolong nature *** results suggested that the impacts of human activities were limited in valley regions due to topography by resistance ***,Circuit model demonstrated that the conservation corridors for giant panda could not be identified between the Miarro and the Caopo nature ***,more detailed corridors between habitats were planned by the LCP ***,we also identified bottlenecks for migration in each corridor,indicating that human activities’interference was the primary *** approach not only could connect habitats for conservation in mountain areas but also found out that the corridor could not be identified between habitats.

关键词： Corridors Human activities Mountain areas Giant panda

Conflict between wild boars(Sus scrofa) and farmers:distribution, impacts,and suggestions for management of wild boars in the Three Gorges Reservoir Area

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Journal of Mountain Science 2019年第10期16卷 2404-2416页

作者： LIU Qin yaN Kun lu ya-feng LI Ming yaN yang-yang Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu610041China Wanzhou Key Regional Ecology and Environment Monitoring Station WanzhouChongqing404020China College of Earth Sciences Chengdu University of TechnologyChengdu610059China University of Chinese Academy of Sciences Beijing100049China

Economic losses caused by wild boars(Sus scrofa)continue to increase in the Three Gorges Reservoir *** selected 206 farmers in Wuqiaohe Basin as survey respondents using random stratified *** distribution and impacts of wild boars were examined using a questionnaire survey and spatial *** results showed that:(1)The density of farmer settlements is low and most peasants’households are located on the forest *** to large-scale labor migration,a high proportion of farmland(25.85%)has been abandoned and an even higher proportion of farmland(40.48%)has been returned to forest.(2)The probability of wild boar damage to peasant households was 67.96%.Yields of corn and sweet potato decreased by 24.87%and 28.24%,respectively,with a total economic loss of approximately 2,590,100 RMB/yr in the Wuqiaohe ***-five percent of the affected cultivatedlands were located within approximately 150 m of the forest edges.(3)The wild boar damage coefficient was significantly and negatively correlated with the distance between the peasants’household and the forest edge,the density of the settlements,and the area of cultivated *** wild boar damage coefficient shows a significant positive correlation with the area of farmland returned to forest.(4)The damage activity caused by wild boars began to occur7-8 years ago,and the destruction has been more frequently and seriously observed in the last 4-5 years.(5)We make suggestions for wild boar control and management measures including developing a compensation *** compensation standard is related to the land area returning from farmland to forests and the actual cultivated land area.

关键词： Distribution features Economic loss Management Three Gorges Reservoir Area Wild boar

Agricultural opportunity costs assessment based on planting suitability:a case study in a mountain county in southwest China

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Journal of Mountain Science 2017年第12期14卷 2568-2580页

作者： liu ju fu bin wang yu-kuan lu ya-feng xu pei institute of mountain hazards and environment chinese academy of sciencesChengdu 610041China key laboratory of environment change and resources use in beibu gulf(guangxi teachers education university) ministry of educationNanning 530001China wanzhou key regional ecology and environment monitoring station Chongqing 404020China

Payment for ecosystem services(PES) has become an increasingly popular means of ecosystem conservation. Opportunity cost is an important factor to increase the investment efficiency of PES ***, the distribution of opportunity cost is usually unclear in mountainous regions due to the obvious environment changes. In this study, we developed a framework to assess the distribution of agricultural opportunity costs in mountainous regions and applied this method to Baoxing County, a typical mountainous county in Sichuan Province of southwest China. Planting suitability of 17 crops was assessed based on agricultural statistics and natural conditions data within a GIS *** opportunity cost was quantified with a weighted summation of farmers' willingness to cultivate and each crop's opportunity cost. Finally,specific agricultural opportunity cost was obtained according to the spatial areas of the protection programs and land use status. The results showed that agricultural opportunity costs of PES in Baoxing County were estimated to be more than $30 million,with a mean of 400.85 $/ha. Agricultural opportunity costs in mountainous regions displayed some obvious spatial variation and areas with lower agricultural opportunity costs could be selected as priority areas for PES. Our findings revealed that the planting suitability evaluation can make agricultural opportunity costs mapping more reasonable. It will be helpful for the PES programs implementation in mountainous regions.

关键词： Opportunity cost Planting suitability Willingness to accept Ecosystem service Spatial variation Baoxing County

An Assessment of Changes in Bioclimatic Types in Sichuan Province, 1961-2010

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Journal of Mountain Science 2015年第1期12卷 145-153页

作者： lu ya-feng LIU yan-Qing XU Pei WANG Yu-kuan LIU Yuan Institute of Mountain Hazards and Environment Chinese Academy of Sciences University of Chinese Academy of Sciences Foreign Economic Cooperation Office Ministry of Environmental Protection

Assessing the impact of climate change is important for ecosystem conservation and plant recovery, especially in climate sensitive regions. Various studies suggested that the KSppen classification is an effective method to depict climate change. However, these studies were restricted to large scales or of limited accuracy due to uncertainties in climate model projections. In addition, the impact of elevation on the shift of climate zones, as compared with other factors, is less emphasized. To address these issues we compiled the KSppen Climate Classification （period 1961-2olo） for the study area, Sichuan Province, China. The spatial resolution was selected as x km x x km. Sichuan Province may be characterized by 3 main climate classes and 1o subtypes. The east-west gradient of the climatic regimes in Siehuan is represented by the main climate classes, warm temperate climates （C）, snow climates （D） and polar climates （E）, at which the most abundant class is C. The most abundant subtype is snow climate with dry winter and cool summer （Dwe）. Shifts in K/Sppen climate classes reflect the observed trend of increasing temperature. Finally, the elevation showed an obvious impact on the distribution and the change of climate classes in Siehuan Province. The shift of areas covered by KSppen climate classes increases with elevation.

关键词： Koppen Climate Classification Climatechange Elevation Sichuan

Impacts of future climate change(2030-2059)on debris flow hazard:A case study in the Upper Minjiang River basin,China

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Journal of Mountain Science 2018年第8期15卷 1836-1850页

作者： LI Ming TIAN Cong-shan WANG Yu-kuan LIU Qin lu ya-feng WANG Shan Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 510041China University of Chinese Academy of Sciences Beijing 100049China Chengdu University of Technology Chengdu 610059China Chengdu Land Planning and Cadastre Center Chengdu 610074China

An increase in extreme precipitation events due to future climate change will have a decisive influence on the formation of debris flows in earthquake-stricken areas. This paper aimed to describe the possible impacts of future climate change on debris flow hazards in the Upper Minjiang River basin in Northwest Sichuan of China, which was severely affected by the 2008 Wenchuan earthquake. The study area was divided into 1285 catchments, which were used as the basic assessment units for debris flow hazards. Based on the current understanding of the causes of debris flows, a binary logistic regression model was used to screen key factors based on local geologic, geomorphologic, soil,vegetation, and meteorological and climatic conditions. We used the weighted summation method to obtain a composite index for debris flow hazards, based on two weight allocation methods: Relative Degree Analysis and rough set theory. Our results showed that the assessment model using the rough set theory resulted in better accuracy. According to the bias corrected and downscaled daily climate model data, future annual precipitation(2030-2059) in the study area are expected to decrease, with an increasing number of heavy rainfall events. Under future climate change, areas with a high-level of debris flow hazard will be even more dangerous, and 5.9% more of the study area was categorized as having a high-level hazard. Future climate change will cause an increase in debris flow hazard levels for 128 catchments, accounting for 10.5% of the total area. In the coming few decades, attention should be paid not only to traditional areas with high-level of debris flow hazards, but also to those areas with an increased hazard level to improve their resilience to debris flow disasters.

关键词： Debris flow Hazard assessment Relative degree analysis Rough set theory Future climate change Minjiang River basin

Changes in cultivated land patterns and driving forces in the Three Gorges Reservoir area, China, from 1992 to 2015

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Journal of Mountain Science 2020年第1期17卷 203-215页

作者： ZHANG Yu-xin WANG Yu-kuan FU Bin LI Ming lu ya-feng DIXIT Amod Mani CHAUDHARY Suresh WANG Shan Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 100049China National Society for Earthquake Technology-Nepal Kathmandu LalitpurP.O.Box 13667Nepal Chengdu Land Planning and Cadastre Center Chengdu 610074China

Changes of cultivated land patterns caused by major water conservation projects are rarely reported. We selected the Three Gorges Reservoir area in China to study the change in area and landscape pattern of the cultivated land in the head,central, and tail areas of the reservoir that took place between 1992 and 2015;we then studied the spatial distribution of the cultivated land in the three parts of the reservoir;finally, we studied the driving forces behind the changes in the cultivated land. The results derived are as follows.(1) During the construction of the Three Gorges Project(TGP, 1992–2015), the area of cultivated land around the reservoir decreased by30.23 million ha. This reduction occurred in phases:the most severe change in cultivated land occurred during the later stage of the project(2002–2010);only 0.62 million ha of cultivated land did not change between 1992 and 2015.(2) Spatial pattern analysis showed that the cultivated land in the three parts of the reservoir changed from a northern distribution to a southern distribution;thus, the area of cultivated land in the north decreased over the time period. The area of cultivated land in the head and tail areas decreased by varying degrees, while it increased in the central area over the 23 years, indicating that the change in cultivated land showed regional differences.(3) The TGP, the policy of reverting farmland to forest,and urbanization were the main driving factors for the change of cultivated land, but there were differences in their impacts at different stages.(4) According to the patch dynamics of the land cover change, the degree of change gradually intensified during the early and later stages of the project and then stabilized during the operational period. Our research provides scientific support for the protection of cultivated land resources and food security in the reservoir area and for the coordination of social and economic development, which is of great significance to sustainable de

关键词： Agricultural land change Three Gorges Reservoir area Landscape index The standard deviation ellipse Cultivated land Driving forces

Relationship between serum vasoactive factors and plaque morphology in patients with non-ST-segment elevated acute coronary syndrome

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Chinese Medical Journal 2010年第2期123卷 193-197页

作者： lu ya-feng LV Shu-zheng CHEN Yun-dai Department of Cardiology Beijing Anzhen Hospital Capital Medical University Beijing Institute of Heart Lung and Blood Vessel Disease Beijing 100029 China Department of Cardiology Beijing Tongren Hospital Capital Medical University Beijing 100176 China Department of Cardiology People's Liberation Army General Hospital Beijing 100853 China

Background Vasoactive factors have been reported to correlate with vulnerable plaque and acute coronary syndrome （ACS）. This study aimed to investigate the relationship between vasoactive factors and plaque morphology in patients suffering from non-ST-segment elevated ACS. Methods From April 2007 to April 2009, 124 consecutive patients suffering from non-ST-segment elevated ACS who had received coronary angiography （CAG） and intravascular ultrasound （IVUS） in the People＇s Liberation Army General Hospital and Beijing Anzhen Hospital were enrolled in this study. Three serum vasoactive factors, plasma soluble vascular endothelial growth factor receptor-1 （sFIt-1）, placental growth factor （PLGF） and interleukin-18 （IL-18）, were measured by enzyme-linked-immunosorbent serologic assay of the patients. The levels of vasoactive factors were compared between vulnerable plaque group and stable plaque group, and between unstable angina pectoris （UAP） group and non-ST-segment elevation acute myocardial infarction （NSTE-AMI） group. The relationship between the plaque morphology and levels of vasoactive factors was analyzed. Results The levels of vasoactive factors were similar between the UAP group （69 patients） and NSTE-AMI group （55 patients）. The levels of sFIt-1 and PLGF in the vulnerable plaque group were significantly higher than those in the stable plaque group. The level of IL-18 was correlated positively with plaque morphology. Multivariate Logistic regression analysis showed that the level of PLGF was an independent risk factor for vulnerable plaque （OR=2.115, 95%Cl 1.415-5.758, P=0.018）. Using the ROC curve, PLGF was a significant factor for the diagnosis of vulnerable plaque （the diagnostic point was 26.3 ng/L, the proportion of square area under the ROC curve was 0.799, 95%C/0.758-0.839, P 〈0.001 ; the sensitivity of PLGF under the ROC curve was 86%, and the specificity 63%）. Conclusion Both IL-18 and PLGF are biomarkers for vulnerable plaques and helpful to predict

关键词： non-ST-segment elevation myocardial infarction unstable angina vasoactive factor vulnerable plaque: intravascular ultrasound

Critical new insights into the interactions of hexafluoropropylene oxide-dimer acid(GenX or HFPO-DA)with albumin at molecular and cellular levels

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Journal of Environmental Sciences 2025年第3期149卷 88-98页

作者： Shi-ya Peng ya-Di yang Rong Tian Naihao lu Jiangxi Key Laboratory of Green Chemistry College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022China

A key characteristic to be elucidated,to address the harmful health risks of environmental perfluorinated alkyl substances(PFAS),is their binding modes to serum albumin,the most abundant protein in *** oxide-dimer acid(GenX or HFPO-DA)is a new industrial replacement for the widespread linear long-chain ***,the detailed interaction of new-generation short-chain PFAS with albumin is still ***,the binding characteristics of bovine serum albumin(BSA)to GenX were explored at the molecular and cellular *** found that this branched short-chain GenX could bind to BSA with affinity lower than that of legacy linear long-chain perfluorooctanoic acid(PFOA).Site marker competitive study and molecular docking simulation revealed that GenX interacted with subdomain IIIA to form BSA-GenX *** with its weaker affinity to albumin protein,the cytotoxicity of branched short-chain GenX was less susceptible to BSA binding compared with that of the linear long-chain *** contrast to the significant effects of strong BSA-PFOA interaction,the weak affinity of BSA-GenX binding did not influence the structure of protein and the cytotoxicity of *** detailed characterization and direct comparisons of serum albumin interaction with new generation short-chain GenX will provide a better understanding for the toxicological properties of this new alternative.

关键词： GenX Protein binding Albumin Cytotoxicity Risk assessment

Understanding the local structure and thermophysical behavior of Mg-La liquid alloys via machine learning potential

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 439-449页

作者： Jia Zhao Taixi feng Guimin lu National Engineering Research Center for Integrated Utilization of Salt Lake Resource East China University of Science and TechnologyShanghai 200237China Joint International Laboratory for Potassium and Lithium Strategic Resources East China University of Science and TechnologyShanghai 200237China

The local structure and thermophysical behavior of Mg-La liquid alloys were in-depth understood using deep potential molecular dynamic(DPMD) simulation driven via machine learning to promote the development of Mg-La alloys. The robustness of the trained deep potential(DP) model was thoroughly evaluated through several aspects, including root-mean-square errors(RMSEs), energy and force data, and structural information comparison results;the results indicate the carefully trained DP model is reliable. The component and temperature dependence of the local structure in the Mg-La liquid alloy was analyzed. The effect of Mg content in the system on the first coordination shell of the atomic pairs is the same as that of temperature. The pre-peak demonstrated in the structure factor indicates the presence of a medium-range ordered structure in the Mg-La liquid alloy, which is particularly pronounced in the 80at% Mg system and disappears at elevated temperatures. The density, self-diffusion coefficient, and shear viscosity for the Mg-La liquid alloy were predicted via DPMD simulation, the evolution patterns with Mg content and temperature were subsequently discussed, and a database was established accordingly. Finally, the mixing enthalpy and elemental activity of the Mg-La liquid alloy at 1200 K were reliably evaluated,which provides new guidance for related studies.

关键词： magnesium-lanthanum liquid alloys local structure macroscopic properties thermodynamic behavior deep potential mo-lecular dynamic simulation