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Species Distribution Modelling performance and its implication for Sentinel-2-based prediction of invasive Prosopis juliflora in lower Awash River basin, Ethiopia

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ecological Processes 2021年第1期10卷 250-265页

作者： Nurhussen Ahmed Clement Atzberger Worku Zewdie Department of Remote Sensing Entoto Observatory and Research CenterEthiopian Space Science and Technology Institute(ESSTI)Addis AbabaEthiopia. Department of Geography and environmental Studies Wollo UniversityDessieEthiopia. Institute of Geomatics University of Natural Resources and Life SciencesVienna(BOKU)Peter JordanStraße 821190 ViennaAustria.

Background:Species Distribution Modelling(SDM)coupled with freely available multispectral imagery from Sentinel-2(S2)satellite provides an immense contribution in monitoring invasive ***,attempts to evaluate the performances of SDMs using S2 spectral bands and S2 Radiometric Indices(S2-RIs)and biophysical variables,in particular,were ***,this study aimed at evaluating the performance of six commonly used SDMs and one ensemble model for S2-based variables in modelling the current distribution of Prosopis juliflora in the lower Awash River basin,***-five variables were computed from Sentinel-2B level-2A,and out of the variables,twelve significant variables were selected using Variable Inflation Factor(VIF).A total of 680 presence and absence data were collected to train and validate variables using the tenfold bootstrap replication approach in the R software“sdm”*** performance of the models was evaluated using sensitivity,specificity,True Skill Statistics(TSS),kappa coefficient,area under the curve(AUC),and ***:Our findings demonstrated that except bioclim all machine learning and regression models provided successful *** the tested models,Random Forest(RF)performed better with 93%TSS and 99%AUC followed by Boosted Regression Trees(BRT),ensemble,Generalized Additive Model(GAM),Support Vector Machine(SVM),and Generalized Linear Model(GLM)in decreasing *** relative influence of vegetation indices was the highest followed by soil indices,biophysical variables,and water indices in decreasing *** to RF prediction,16.14%(1553.5 km^(2))of the study area was invaded by the alien ***:Our results highlighted that S2-RIs and biophysical variables combined with machine learning and regression models have a higher capacity to model invasive species ***,the use of machine learning algorithms such as RF algorithm is highly essential for remote sensing-based inva

关键词： Biophysical processors Prosopis juliflora Radiometric indices Remote sensing Sentinel-2 Species Distribution Modelling

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Wetland Economic Valuation Approaches and Prospects in China

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Chinese Geographical Science 2016年第2期26卷 143-154页

作者： JIANG Bo Christina P.WONG CUI Lijuan OUYANG Zhiyun State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Changjiang Water Resources Protection Institute Wuhan 430051 China School of Sustainability Arizona State University Tempe AZ 85287 US.A Institute of Wetland Research Chinese Academy of Forestry Beijing 100091China

Ecosystem services valuation seeks to increase the social relevance of ecosystem characteristics, the underlying biological mechanisms that support services, by making the contribution of ecosystems to human well-being explicit. Economic valuation can help management by clarifying the full range of benefits and costs of proposed management actions. In the past two decades, economic valuation of wetland ecosystem services has become one of the most significant scientific priorities for wetland protection. In this paper, we provide an overview of ecosystem services, and summarize the main interdisciplinary approaches to measure and value wetland ecosystem services. We identified four main methodological gaps preventing progress on wetland valuation of ecosystem services in China, which are: 1) confusion on terminology like intermediate and final ecosystem services, 2) lack of ecological production functions to link ecosystem characteristics to final ecosystem services, 3) static valuation making it difficult to evaluate the trade-offs and synergies among ecosystem services, and 4) lack of clear guidance on relating ecological compensation programs to conservation targets. Overcoming these gaps is important to inform wetland compensation mechanisms and conservation policies. We propose future research on wetland ecosystem services in China should be focused on: 1) defining final ecosystem services based on beneficiary preferences and underlying biophysical mechanisms, 2) establishing wetland monitoring programs at specific sites to collect data on final ecosystem service indicators and ecosystem characteristic metrics to create ecological production functions for economic valuation and rescaling techniques, and 3) incorporating wetland ecosystem service values into decision-making processes to inform wetland management.

关键词：湿地保护经济评价方法生态系统服务价值中国展望价值评估生物物理机制经济价值

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中国县域尺度生态保护的地域分异及其适宜性（英文）

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Journal of Geographical Sciences 2018年第1期28卷 46-58页

作者：黄麟郑瑜晗肖桐 Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources Research CAS University of Chinese Academy of Sciences Satellite Environment center Ministry of Environmental Protection

China＇s investments, financial incentives and deductions in terms of ecological conservation are based at the county level. Therefore, the monitoring and assessment of the effects of ecological conservation at the county level is important to provide a scientific basis for the assessment of the ecological and environmental quality at the county scale. This paper quantitatively estimated the dynamics of high-quality ecosystems and vegetation coverage over the past 15 years, and their relationships with the number of ecological conservation programs at the county level were analyzed. Then, the effects of ecological conservation measures on ecological changes at the county level and their regional suitability were as- sessed and discussed. The results showed that counties with a percentage of high-quality ecosystems greater than 50% were primarily distributed in northeastern China, southern subtropical China and the southeastern Qinghai-Tibet Plateau, and those with a percentage lower than 20% were mostly distributed in northwestern China, the southwestern karst region and the North China Plain. In recent decades, ecological conservation has focused on ecol- ogically fragile regions; more than five ecological conservation programs have been imple- mented in most counties of the Three River Source Region in Qinghai Province, southeastern Tibet, western Sichuan, the Qilian Mountains, southern Xinjiang and other western regions, while only one or zero have been implemented in the eastern coastal area of China. Over the past 15 years, the proportional area of high-quality ecosystems has increased in approxi- mately 53% of counties. The vegetation coverage of counties in the Loess Plateau, Huang-Huai-Hai Plain, Beijing-Tianjin-Hebei （Jing-Jin-Ji）, Sichuan-Guizhou-Chongqing, and Guangdong-Guangxi provincial-level areas has increased significantly. However, it decreased in northern Xinjiang, central Tibet, central and eastern Inner Mongolia, the Yangtze River Delta and other

关键词： ecological conservation high-quality ecosystem regional differentiation suitability assessment county scale China

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ecological Effects of the South-to-North Water Diversion Project on the Hanjiang River

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Bulletin of the Chinese Academy of Sciences 2006年第3期20卷 166-173页

作者： DU Yun WANG Xuelei CAI Shuming CAS Institute of Geodesy & Geo-physics Hubei Province's Key Laboratory for Environment & Disaster Monitoring and Evaluation

Based on their studies on the ecological effect of the Sough-to-North Water Diversion Project on the Hanjiang River, CAS researchers offer suggestions on eco-environmental rehabilitation.

关键词：调水工程生态效应汉江中国

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Principles for managing marine ecosystems prone to tipping points

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Ecosystem Health and Sustainability 2015年第5期1卷 15-32页

作者： Kimberly A.Selkoe Thorsten Blenckner Margaret R.Caldwell Larry B.Crowder Ashley L.Erickson Timothy E.Essington James A.Estes Rod M.Fujita Benjamin S.Halpern Mary E.Hunsicker Carrie V.Kappel Ryan P.Kelly John N.Kittinger Phillip S.Levin John M.Lynham Megan E.Mach Rebecca G.Martone Lindley A.Mease Anne KSalomon Jameal F.Samhouri Courtney Scarborough Adrian C.Stier Crow White Joy Zedler National center for ecological Analysis and Synthesis 735 State StreetSuite 300Santa BarbaraCalifornia 93101 USA Hawaii Institute of Marine Biology University of HawaiiKaneoheHawaii 96744 USA Stockholm Resilience Centre Stockholm UniversityKra¨ftriket 2B10691 StockholmSweden center for Ocean Solutions Stanford Woods Institute for the EnvironmentStanford University473 Via Ortega Room 193StanfordCalifornia 94305 USA School of Aquatic and Fishery Sciences University of WashingtonSeattleWashington 98195 USA Department of Ecology and Evolutionary Biology 100 Shaffer RoadUniversity of CaliforniaSanta CruzCalifornia 95060 USA environmental Defense Fund 123 Mission Street28th FloorSan FranciscoCalifornia 94105 USA Bren School of environmental Science and Management University of CaliforniaSanta BarbaraCalifornia 93106 USA Imperial College London Silwood Park CampusBuckhurst RoadAscot SL57PY United Kingdom School of Marine and environmental Affairs University of Washington3707 Brooklyn Avenue NESeattleWashington 98105-6715 USA Conservation International Betty and Gordon Moore Center for Science and Oceans7192 Kalaniana‘ole HighwaySuite G230HonoluluHawaii 96825 USA Conservation Biology Division Northwest Fisheries Science CenterNational Marine Fisheries ServiceNational Oceanic and Atmospheric Administration2725 Montlake Boulevard EastSeattleWashington 98112 USA Department of Economics University of Hawaii at ManoaHonoluluHawaii 96822 USA School of Resource and environmental Management Simon Fraser UniversityBurnabyBritish Columbia V5A1S6 Canada Department of Biological Sciences California Polytechnic State UniversitySan Luis ObispoCalifornia 93407 USA Botany Department University of WisconsinMadisonWisconsin 53706 USA

As climatic changes and human uses intensify,resource managers and other decision makers are taking actions to either avoid or respond to ecosystem tipping points,or dramatic shifts in structure and function that are often costly and hard to *** indicates that explicitly addressing tipping points leads to improved management *** on theory and examples from marine systems,we distill a set of seven principles to guide effective management in ecosystems with tipping points,derived from the best available *** principles are based on observations that tipping points(1)are possible everywhere,(2)are associated with intense and/or multifaceted human use,(3)may be preceded by changes in earlywarning indicators,(4)may redistribute benefits among stakeholders,(5)affect the relative costs of action and inaction,(6)suggest biologically informed management targets,and(7)often require an adaptive response to *** suggest that early action to preserve system resilience is likely more practical,affordable,and effective than late action to halt or reverse a tipping *** articulate a conceptual approach to management focused on linking management targets to thresholds,tracking early-warning signals of ecosystem instability,and stepping up investment in monitoring and mitigation as the likelihood of dramatic ecosystem change *** approach can simplify and economize management by allowing decision makers to capitalize on the increasing value of precise information about threshold relationships when a system is closer to tipping or by ensuring that restoration effort is sufficient to tip a system into the desired regime.

关键词： critical transition ecosystem-based management marine spatial planning nonlinear relationships restoration ecology stakeholder engagement

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Predicting erosion and sediment yield in a mesoscale basin in the semiarid monsoon region Miyun/China

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ecological Processes 2014年第1期3卷 214-224页

作者： Michael Gebel Mario Uhlig Stefan Halbfass Ralph Meissner Shuhuai Duan Gesellschaft für Angewandte Landschaftsforschung(GALF)bR Am Ende 1401277 DresdenGermany Department of Soil Physics Helmholtz Centre for Environmental Research–UFZLysimeter StationDorfstraße 5539615 FalkenbergGermany Beijing Soil and Water Conservation center(BWA) No.5 Yunuantan South RoadBeijing 100038Haidian DistrictChina

Introduction:Changes in land use and agricultural management have caused a strong increase in sediment and particulate phosphorus input into the Miyun *** simulation of the relevant runoff and sediment fluxes at the mesoscale needs adequate procedures,adapted to a semiarid monsoon climate and regional land-use ***:The modified Universal Soil Loss Equation(USLE-M)was integrated into the STOFFBILANZ model to calculate daily soil losses in the entire Miyun catchment *** results are well within the range of monitoring data from Wischmeier plots that are located inside the investigation *** the reference year 2009,soil erosion was estimated at an average of 952 kg ha^(-1) year^(-1).Daily based simulation of sediment input into surface waters was done in the next step,taking into account the likeliness of sediment input and sediment delivery *** sediment inputs are by 113 kg ha^(-1) year^(-1).Critical source areas are located on cropland and are particularly relevant on the former lakebed of the Miyun reservoir which has recently been used for corn ***:Compared with observation data from the Bai and Chao rivers,the simulation of sediment loads showed a satisfying agreement that underlines the suitability of the selected approach to substitute recently used one-year balances based on the Universal Soil Loss Equation(USLE)*** tillage was selected as a possible mitigation option to reduce soil erosion and sediment *** to the limited availability of spatial and monitoring data,the simulations are approximate and only a first step in contributing to an integrated river basin management that should be improved in future.

关键词： Direct runoff Mesoscale Miyun Model Sediment input Soil erosion STOFFBILANZ

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Estimating the population density of the Asian tapir (Tapirus indicus) in a selectively logged forest in Peninsular Malaysia

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Integrative Zoology 2012年第4期7卷 373-380页

作者： D.Mark RAYAN Shariff Wan MOHAMAD Leejiah DORWARD Sheema Abdul AZIZ Gopalasamy Reuben CLEMENTS Wong Chai Thiam CHRISTOPHER Carl TRAEHOLT David MAGINTAN WWF Malaysia SelangorMalaysia Durrell Institute of Conservation and Ecology(DICE) University of KentCanterburyUK School of environmental Science University of East AngliaNorwichNorfolkUK School of Marine and Tropical Biology James Cook UniversityCairnsQueenslandAustralia center for Malaysian Indigenous Studies University of MalayaKuala LumpurMalaysia Copenhagen Zoo CopenhagenDenmark Department of Wildlife and National Parks Kuala LumpurMalaysia

The endangered Asian tapir(Tapirus indicus)is threatened by large-scale habitat loss,forest fragmentation and increased hunting *** planning for this species,however,is hampered by a severe paucity of information on its ecology and population *** present the first Asian tapir population density estimate from a camera trapping study targeting tigers in a selectively logged forest within Peninsular Malaysia using a spatially explicit capture-recapture maximum likelihood based *** a trap effort of 2496 nights,17 individuals were identified corresponding to a density(standard error)estimate of 9.49(2.55)adult ta-pirs/100 *** our results include several caveats,we believe that our density estimate still serves as an important baseline to facilitate the monitoring of tapir population trends in Peninsular *** study also highlights the potential of extracting vital ecological and population information for other cryptic individual-ly identifiable animals from tiger-centric studies,especially with the use of a spatially explicit capture-recapture maximum likelihood based framework.

关键词： abundance camera trap large mammals maximum likelihood based framework Southeast Asia spatially explicit capture recapture(SECR)

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Emerging pollutants in the environment:A challenge for water resource management

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International Soil and Water Conservation Research 2015年第1期3卷 57-65页

作者： Violette Geissen Hans Mol Erwin Klumpp Günter Umlauf Marti Nadal Martine van der Ploeg Sjoerd E.A.T.M.van de Zee Coen J.Ritsema Soil Physics and Land Management Group Wageningen University6708PB WageningenThe Netherlands Rikilt WageningenThe Netherlands Agrosphere Forschungszentrum JülichJülichGermany Joint Research center IspraItaly Laboratory of Toxicology and environmental Health IISPVUniversitat Rovira i VirgiliReusSpain

A significant number of emerging pollutants(EPs)resulting from point and diffuse pollution is present in the aquatic *** are chemicals that are not commonly monitored but have the potential to enter the environment and cause adverse ecological and human health *** to the NORMAN network,at least 700 substances categorized into 20 classes,have been identified in the European aquatic *** light of their potential impact action is urgently *** this study,we present a concept that shows the current state of art and challenges for monitoring programs,fate and risk assessment tools and requirements for policies with respect to emerging pollutants as a base for sustainable water resource ***,methods for sampling and analysis are not harmonized,being typically focused on certain EP *** a number of known highly hazardous EPs detection limits are too high to allow proper risk *** other EPs such as microplastics method development is in its *** ultra-sensitive instrumental techniques should be used for quantitative determination of prioritized EPs in water,suspended matter,soil and *** on EPs'and their metabolites'properties that determine their fate in the environment are often not *** surveys on water quality often use different parameters for water quality assessment and often do not include EPs.A harmonized monitoring of surface and groundwater is not yet achieved and urgently *** component integrated into models assessing the fate of EPs in a multi compartment environmental approach are missing and must be *** main goal of risk assessment is the overall protection of ecological communities in the aquatic environment and human *** methods for assessing the cumulative risks from combined exposures to several stressors,including mixtures of EPs in a multi-scale approach are required.A combination of regulations and management meas

关键词： Emerging pollutants Water resource management monitoring Risk assessment Water policies

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Ecology of industrial pollution in China

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Ecosystem Health and Sustainability 2020年第1期6卷 152-168,151页

作者： Jingjing Yuan Yonglong Lu Chenchen Wang Xianghui Cao Chunci Chen Haotian Cui Meng Zhang Cong Wang Xiaoqian Li Andrew C.Johnson Andrew J.Sweetman Di Du State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijingChina Key Laboratory of the Ministry of Education for Coastal Wetland Ecosystems College of the Environment and EcologyXiamen UniversityFujianChina University of Chinese Academy of Sciences BeijingChina Centre for Ecology&Hydrology OxonUK Lancaster Environment Centre Lancaster UniversityLancasterUK

Industrial development has brought China both opportunities and challenges since the reform and opening up in *** and temporal analysis showed that rapid industrialization has made eastern China under a more serious pollution *** most serious effects of industrial pollution were reflected in aquatic and soil ecosystem degradation,and damage can be observed from species,population,and community to ecosystem *** consciousness about contaminated sites rose from 2004 leading to greater efforts in ecological remediation,monitoring,and risk *** efforts are still needed in expanding the extent and breadth of monitoring to explore where the greatest ecological risks lie and how to control *** of industrial pollution has become a popular discipline in China and will be further developed to help achieve the Sustainable Development *** research for a better ecological risk management should be focused on multi-media transfer and effects of mixed pollutants,mechanisms for clean energy and material flow,and integration of ecological risk with human health risk.

关键词： Industrial pollution soil and aquatic ecosystem watershed monitoring and assessment contaminated site ecological risk assessment ecosystem management

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Evolutionary trend of water cycle in Beichuan River Basin of China under the influence of vegetation restoration

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Journal of Groundwater Science and Engineering 2021年第3期9卷 202-211页

作者： Liang Zhu Jing-tao Liu Ming-nan Yang Yu-xi Zhang De-ping Wen Institute ofHydrogeology and environmental Geology Chinese Academy of Geological SciencesShijiazhuang 050061China. Key Laboratory of Groundwater Contamination and Remediation China Geological Survey&Ilebel ProvinceShijiazhuang 050061China. Qinghai Provincial Flood and Drought Disaster Prevention Service center Xining 810001China.

The study aims to identify a suitable site for open and bore well in a farmhouseusing ground magnetic survey in south *** also aims to define depth to granitoid and structural elements which traverse the selected *** data(n=84)measured,processed and interpreted as qualitative and *** results of total magnetic intensities indicate that the area is composed of linear magnetic lows trending NE-SW direction and circular to semi-circular causative *** magnetic values ranged from-137 nT to 2345 nT with a mean of 465 *** to equator shows significant shifting of causative bodies in the southern and northern *** signal map shows exact boundary of granitic *** directional filter has brought out structural element trending NE-SW *** of individual profile brought to light structurally weak zone between 90 m and 100 m in all the profile *** decrease of magnetic values from 2042 nT to 126 nT noticed in profile line 6 between 20 m and 30 m indicates fault *** breaks obtained from these maps were visualized,interpreted and identified two suitable sites for open and bore *** averaged power spectrum estimates depth of shallow and deep sources in 5 m and 50 m,*** method has also been applied to estimate depth of granitoid and structural elements using structural indexes 0,1,2,and 3 and found depth ranges from90 *** indicates magnetic method is one of the geophysical methods suitable for groundwater exploration and site selection for open and borewells.

关键词： Vegetation coverage Water cycle in a river basin ecological water consumption Water conservation

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