检索结果-南通市图书馆

Chinese Geographical Science 2019年第6期29卷 974-984页

作者： WU Haitao LU Kangle LYU Xianguo xue zhenshan Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China University of Chinese Academy of Sciences Beijing 100049China

Adjacent intensive agriculture disturbs the natural condition of ***, to assess the effect of this agriculture on wetlands, few studies have used indices based on aquatic ***-metric indices(MMIs) have been successfully used to assess freshwater ecosystems worldwide and are an important management tool, but little is known about their applicability in the Sanjiang Plain, Northeast *** this study, we developed a MMIs for aquatic invertebrates to assess freshwater wetlands in this *** aquatic invertebrate assemblages were sampled in 27 wetlands in the Sanjiang Plain that included those in natural reserves and those affected by adjacent, intensive ***-four candidate metrics were initially reviewed and screened before four core metrics were selected: total number of taxa, number of Hemiptera taxa, proportion of Gastropoda, and proportion of ***-Whitney U tests, Box and Whisker plots, correlation analyses, and redundant metric tests were used to assess the ability of metrics to distinguish among reference and impaired *** ordinal rating categories for wetland were defined: poor, fair, good, and *** the impaired freshwater wetlands, 76.2% were in poor or fair *** MMIs was robust in discriminating reference wetlands from impaired wetlands and therefore have potential as a biomonitoring tool to assess the condition and to guide the restoration efforts of freshwater wetlands in Northeast China.

关键词： bio-assessment Hemiptera Mollusca multi-metric indices(MIS) bioassessment of wetland the Sanjiang Plain

Effects of Tidal Channels and Roads on Landscape Dynamic Distribution in the Yellow River Delta, China

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2020年第1期30卷 170-179页

作者： YU Xiaojuan ZHANG Zhongsheng xue zhenshan WU Haitao ZHANG Hongri Shangdong University of Science and Technology Qingdao 266590China Northeast Institute of Geography and Agroecology Chinese Academy of SciencesChangchun 1301012China

Landscape characters in estuarine regions generally controlled by tidal regimes and human activities like road *** this work,tidal channels and road construction in the Yellow River Delta(YRD)were extracted by visual interpretation methods so as to decipher impacts of tidal channel development and road construction on landscape patch change during 1989–*** distribution history of three wetlands,which covered by Phragmites australis(freshwater marsh,FM),Suaeda salsa(salt marsh,SM),and mudflats(MD)were also *** indicated that tidal channel,number,frequency,and fractal dimension were all the maximum in 2003,and the minimum in 1998,*** length,number,and density showed increasing trend during 1989–*** were the predominant landscape type,followed by FM and SM during *** component analysis implied two extracted factors,F1 and F2,which could represent 91.93% of the total variations.F1 mainly proxied tidal channel development,while F2 represented road construction.A multiple linear regression analysis showed positive effects of both F1 and F2 on FM patch numbers and negative impacts on SM patch areaes with R^2 values of 0.416 and 0.599,*** channels were negatively related to MD patch numbers,while roads were positively related to *** any case,road construction showed larger impacts on landscape type shifting than that of tidal channel development in the YRD.

关键词： tidal channel development road construction principal component analysis multiple linear regression analysis the Yellow River Delta

Scaling of Soil Carbon,Nitrogen,Phosphorus and C:N:P Ratio Patterns in Peatlands of China

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2017年第4期27卷 507-515页

作者： ZHANG Zhongsheng xue zhenshan LYU Xianguo TONG Shouzheng JIANG Ming Key Laboratory of Wetland Ecology and Environment Institute of Northeast Geography and AgroecologyChinese Academy of SciencesChangchun 130102China

Inspired by the importance of Redfield-type C:N:P ratios in global soils,we looked for analogous patterns in peatlands and aimed at deciphering the potential affecting *** analyzing a suite of peatlands soil data(n = 1031),mean soil organic carbon(SOC),total nitrogen(TN) and total phosphorous(TP) contents were 50.51%,1.45% and 0.13%,respectively,while average C:N,C:P and N:P ratios were 26.72,1186.00 and 46.58,respectively.C:N ratios showed smaller variations across different vegetation coverage and had less spatial heterogeneity than C:P and N:P *** consistent C:N:P ratio,though with a general value of 1245:47:1,was found for entire peatland soils in *** Northeast China,Tibet,Zoigê Plateau and parts of Xinjiang had high soil SOC,TN,TP,and C:P ***,parts of the lower reaches of the Yangtze River,and the coast zones have low TP and N:P *** differences for SOC,TN,TP,C:N,C:P and N:P ratios were observed across groups categorized by predominant ***,temperature and precipitation all closely related to SOC,TN,TP and their pairwise *** hydrothermal coefficient(RH),defined as annual average precipitation divided by temperature,positively and significantly related to C:N,C:P and N:P ratios,implying that ongoing climate change may prejudice peatlands as carbon sinks during the past 50 years in China.

关键词： peatlands C:N:P ratio stoichiometry climate change

The spatiotemporal changes of marshland and the driving forces in the Sanjiang Plain, Northeast China from 1980 to 2016

在线全文

学校读者我要写书评

暂无评论

Ecological Processes 2020年第1期9卷 263-275页

作者： Zhen Li Miao Liu Yuanman Hu zhenshan xue Jinling Sui CAS Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China Research Center of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China Key Laboratory of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China

Background:Wetland loss is a global concern due to its enormous ecosystem ***,a typical natural wetland,which is concentrated in the Sanjiang Plain,has undergone dramatic loss in the last several *** spatiotemporal changes in marshland were studied based on Landsat images of the Sanjiang Plain from 1980 to 2016 with the land use maps in 1980,1995,2000,2005,2010,and 2016 using land use dynamic degree and landscape *** driving forces of marshland loss,including biophysical factors,socio-economic factors,and land management,were analyzed with boosted regression trees(BRTs)***:The area of marshland loss was 7372 km^(2),which accounted for 65.7%of the area of marshland in 1980;however,the paddy field area was expanded by 22,313 km^(2).The lost marshland was mainly converted to dry farmland(47.5%)and paddy field(47.2%)during *** the landscape pattern of the study area and marshland became increasingly *** relatively important factors responsible for marshland loss were biophysical factors,socio-economic factors,and land management,which accounted for 65.2%,25.5%,and 8.4%,*** most important driving forces with high“relative influence”were“distance to river,”which accounted for 20.6%of the total variance ***“relative influence”of potential crop yield and ditch density reached 20.2%and 8.4%,***:Significant land use changes have occurred in the Sanjiang Plain over the past 37 years,with characteristics of rapid paddy field expansion and drastic marshland ***,marshland fragmentation continued to *** was the main reason for the large-scale marshland *** factors influenced the decisions regarding the locations of marshland ***,climate factors(i.e.,average annual precipitation and average annual temperature)also played an important role in marshland *** results can provide helpful knowledge for understanding the patt

关键词： Land use change Marshland loss Driving forces The Sanjiang Plain

Review of Rapid Transformation of Floodplain Wetlands in Northeast China： Roles of Human Development and Global Environmental Change

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Geographical Science 2018年第4期28卷 654-664页

作者： YU Xiaofei DING Shanshan ZOU Yuanchun xue zhenshan LYU Xianguo WANG Guoping Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130102 China University of Chinese Academy of Sciences Beijing 100049 China

Northeast China is the region with the largest area of wetlands in China. The Sanjiang Plain and the Songnen Plain are large freshwater marsh distribution regions that are affected by climate warming and by the increasing frequency and density of extreme weather and are the regions most subject to disturbances by human activities in Northeast China. The wetlands of the Sanjiang Plain and the Songnen Plain have shrunk severely in the past 60 years, and wetland functions have been reduced substantially because of climate change, unreasonable land use, fire episodes, engineering and construction works and urbanization. Large-scale agricultural development started in the 1950 s has been the most important driving factor for wetland loss and degradation in the Sanjiang Plain. Water shortage has been the most important factor for degradation and fragmentation of wetlands in the Songnen Plain. To mitigate wetland degradation and better protect wetlands, special regulations, long-term mechanisms and technical support of wetland protection should be established. A wetland compensation program should be implemented, and technologies for increasing the adaptive capacity of wetlands should be developed. Moreover, it is most important to find the balanced threshold between agricultural development and wetland protection.

关键词： wetland climate change human activities wetland recovery Sanjiang Plain Songnen Plain

Impacts of Climate and Nutrients on Carbon Sequestration Rate by Wetlands: A Meta-analysis

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2020年第3期30卷 483-492页

作者： CHENG Caifeng LI Min xue zhenshan ZHANG Zongsheng LYU Xianguo JIANG Ming ZHANG Hongri College of Geomatics Shandong University of Science and TechnologyQingdao 266590China Northeast Institute of Geography and Agroecology Chinese Academy of ScienceChangchun 130024China

Global numerous wetlands are the most productive ecosystem and have high carbon sequestration potential to mitigate increasing CO2 in the atmosphere. However, few are available on estimating average carbon sequestration rates by global wetlands(Carbonsq) at century timescale. In this article, Carbonsq data of 473 wetland soil/sediment cores from the literatures were collected in detail by the meta-analysis method. These cores were no more than 300 years old and spanned a latitudinal range from 33.6° S to 69.7° N. Globally, the average Carbonsq was 185.2 g/(m^2·yr) regardless of wetland types. Carbonsq varied remarkably between wetland types and ranked as an order of salt marsh(247.7 g/(m^2·yr)) > mangrove(229.8 g/(m^2·yr)) > freshwater marsh(196.7 g/(m^2·yr)) > peatland(76.9 g/(m^2·yr)). Carbonsq was positively related to mean annual temperature(AMT) and annual precipitation(Pre). Nitrogen was the most common and primary factor controlling Carbonsq regardless of wetland types.

关键词： global wetlands carbon sequestration temperature and precipitation nutrient phosphorus

Spatial and Temporal Changes of Wetlands on the Qinghai-Tibetan Plateau from the 1970s to 2010s

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2018年第6期28卷 935-945页

作者： xue zhenshan LYU Xianguo CHEN Zhike ZHANG Zhongsheng JIANG Ming ZHANG Kun LYU Yonglei Research Center of Wetland Ecology and Environment Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130102 China Heilongjiang Agricultural Reclamation Survey Design and Research Institute Harbin 150090 China Jilin Provincial Joint Key Laboratory of Changbai Mountain Wetland and Ecology Changchun 130102 China Department of Environmental Science and Engineering Southwest Forestry College Kunming 650224 China Institute of Tibetan Forestry Survey and Planning Forestry Department of Tibet Lhasa 850000 China

Wetlands on the Qinghai-Tibetan Plateau （QTP） perform a dazzling array of vital ecological functions and are one of the most fragile ecosystems in the world. Timely and accurate information describing wetland resources and their changes over time is becoming more important in their protection and conservation. By using remote sensing data, this study intended to investigate spatial distribution and temporal variations of wetlands on the QTP at different watershed scales from 1970s to 2010s. Results show that wetlands on the QTP have undergone widespread degradation from 1970s to 2010s, with nearly 6.4% of their area being lost. Areas of freshwater marsh, salt marsh and wet meadow declined by 46.6%, 53.9% and 15.6%, respectively, while lake area increased by 14.6%. The most extensive losses of natural wet/ands have occurred in endorheic basins, such as in the Kunlun-Altun-Qilian Drainage Basin and Qiangtang Basin, which shrank by 44.5% and 33.1%, respectively. A pronounced increase in temperature tends to facilitate the evaporation process and reduce water availability for wetlands, One-third of the wetlands on the QTP are under threat of being submerged due to lakes rising in recent years. More research is needed to gain insight into the interaction mechanisms behind observed variations and potential impacts from further warming in the future.

关键词： wetland spatial and temporal change climate change Qinghai-Tibetan Plateau (QTP)

Molecular Fingerprints of Soil Organic Matter in a Typical Freshwater Wetland in Northeast China

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2019年第4期29卷 700-711页

作者： LI Zhe ZHANG Zhongsheng xue zhenshan SONG Xiaolin ZHANG Hongri WU Haitao JIANG Ming LYU Xianguo College of Geomatics Shandong University of Science and Technology Qingdao 266590 China Northeast Institute of Geography and Agroecology Chinese Academy of Science Changchun 130024 China

Natural wetlands are known to store huge amounts of organic carbon in their soils. Despite the importance of this storage,uncertainties remain about the molecular characteristics of soil organic matter(SOM), a key factor governing the stability of soil organic carbon(SOC). In this study, the molecular fingerprints of SOM in a typical freshwater wetland in Northeast China were investigated using pyrolysis gas-chromatography/mass-spectrometry technology(Py-GC/MS). Results indicated that the SOC, total nitrogen(TN),and total sulfur contents of the cores varied between 16.88% and 45.83%, 0.93% and 2.82%, and 1.09% and 3.79%, respectively. The bulk δ^13C and δ^15N varied over a range of 9.85‰, between –26.85‰ and –17.00‰, and between –0.126‰ and 1.002‰, respectively. A total of 134 different pyrolytic products were identified, and they were grouped into alkyl(including n-alkanes(C:0) and n-alkenes(C:1),aliphatics(Al), aromatics(Ar), lignin(Lg), nitrogen-containing compounds(Nc), polycyclic aromatic hydrocarbons(PAHs), phenols(Phs), polysaccharides(Ps), and sulfur-containing compounds(Sc). On average, Phs moieties accounted for roughly 24.11% peak areas of the total pyrolysis products, followed by Lg(19.27%), alkyl(18.96%), other aliphatics(12.39%), Nc compounds(8.08%), Ps(6.49%), aromatics(6.32%), Sc(3.26%), and PAHs(1.12%). Soil organic matter from wetlands had more Phs and Lg and less Nc moieties in pyrolytic products than soil organic matters from forests, lake sediments, pastures, and farmland.δ^13 C distribution patterns implied more C3 plant-derived soil organic matter, but the vegetation was in succession to C4 plant from C3 plant. Significant negative correlations between Lg or Ps proportions and C3 plant proportions were observed. Multiple linear analyses implied that the Ar and Al components had negative effects on SOC. Alkyl and Ar could facilitate ratios between SOC and total nitrogen(C/N), while Al plays the opposite role. Al was positively related to the ra

关键词： molecular fingerprint soil organic matter pyrolysis gas-chromatography/mass-spectrometry freshwater marsh Northeast China

Value Assessment of Wetland Ecosystem Services in the Da Hinggan Mountains, China

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2022年第2期32卷 302-311页

作者： ZHANG Tingting LYU Xianguo ZOU Yuanchun LIU Jiping JIANG Ming XU Chunguang ZHOU Cuicui XU Chen xue zhenshan Jilin Normal University Siping 136000China Research Center of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China Jilin Land and Resources Survey and Planning Changchun 130012China Jilin Basic Geographic Information Center Changchun 130012China University of Chinese Academy of Sciences Beijing 100049China

This study examined regional differences in ecosystem services for the Da Hinggan Mountains(DHM),China.A correction index was constructed based on ten-year average net primary productivity(NPP)data.A new equivalent factor table that was suitable for the assessment of wetlands in the DHM was formed by using the expert weight determination method(EWDM).An evaluation model was established for evaluating the ecosystem service value(ESV)of wetlands in the *** results show that in 2020,the total ESV of wetlands reached 93361×10^(6) USD,with the forest swamp and marsh ecosystems contributing the *** the perspective of value composition,regulating services and supporting services are the main service functions of wetlands in the *** 2010 to2020,ESV provided by wetlands increased by 4337×10^(6) USD/yr in the *** value of forest swamp and peatland ecosystems increased by 18.6%and 12.7%,respectively,whereas the value of swamp,shrub swamp,and marsh *** research results are of significance for contributing to local government performance evaluation and determining financial compensation for the provision of wetland ecosystem services.

关键词： wetlands ecosystem services value net primary productivity(NPP) Da Hinggan Mountains expert weight determination

The interaction between temperature and precipitation on the potential distribution range of Betula ermanii in the alpine treeline ecotone on the Changbai Mountain

在线全文

学校读者我要写书评

暂无评论

Forest Ecosystems 2024年第1期11卷 42-51页

作者： Yu Cong Yongfeng Gu Wen J.Wang Lei Wang zhenshan xue Yingyi Chen Yinghua Jin Jiawei Xu Mai-He Li Hong S.He Ming Jiang Northeast Institute of Geography and Agroecology Chinese Academy of SciencesChangchun 130102China Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains Ministry of EducationSchool of Geographical SciencesNortheast Normal UniversityChangchun 130024China School of Natural Resources University of MissouriColumbiaMO 65211USA Swiss Federal Institute for Forest Snow and Landscape Research WSLCH-8903 BirmensdorfSwitzerland School of Life Science Hebei UniversityBaoding 071000China

Alpine treeline ecotones are highly sensitive to climate *** low temperature-determined alpine treeline is expected to shift upwards in response to global ***,little is known about how temperature interacts with other important factors to influence the distribution range of tree species within and beyond the alpine treeline ***,we used a GF-2 satellite image,along with bioclimatic and topographic variables,to develop an ensemble suitable habitat model based on the species distribution modeling algorithms in *** investigated the distribution of suitable habitats for *** under three climate change scenarios(i.e.,low(SSP126),moderate(SSP370)and extreme(SSP585)future emission trajectories)between two consecutive time periods(i.e.,current-2055,and 2055-2085).By 2055,the potential distribution range of *** will expand under all three climate *** medium and high suitable areas will decline under SSP370 and SSP585scenarios from 2055 to ***,under the three climate scenarios,the uppermost altitudes of low suitable habitat will rise to 2,329 m a.s.l.,while the altitudes of medium and high suitable habitats will fall to 2,201 and2,051 m *** 2085,*** promotes the expansion of *** distribution range in Changbai Mountain,and this expansion will be modified by precipitation as climate warming *** interaction between temperature and precipitation plays a significant role in shaping the potential distribution range of *** in the alpine treeline *** study reveals the link between environmental factors,habitat distribution,and species distribution in the alpine treeline ecotone,providing valuable insights into the impacts of climate change on high-elevation vegetation,and contributing to mountain biodiversity conservation and sustainable development.

关键词： Biomod2 Birch Climate change Climate scenarios Habitat suitability Range shift Treeline species