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A Macroinvertebrate Multimetric Index for the Bioassessment of Wetlands Adjacent to Agriculture Fields in the Sanjiang Plain, China

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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

Spatial Variation of Dissolved Organic Carbon in Soils of Riparian Wetlands and Responses to Hydro-geomorphologic Changes in Sanjiang Plain, China

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Chinese Geographical Science 2015年第2期25卷 174-183页

作者： XI Min KONG Fanlong lyu xianguo JIANG Ming LI Yue College of Chemical and Environmental Engineering Qingdao University Northeast Institute of Geography and Agroecology Chinese Academy of Sciences

Spatial variation of dissolved organic carbon(DOC) in soils of riparian wetlands and responses to hydro-geomorphologic changes in the Sanjiang Plain were analyzed through in situ collecting soil samples in the Naoli River and the Bielahong River. The results showed that the average contents of DOC for soil layer of 0–100 cm were 730.6 mg/kg, 250.9 mg/kg, 423.0 mg/kg and 333.1 mg/kg respectively from riverbed to river terrace along the transverse directions of the Naoli watershed. The content of the soil DOC was the highest in the riverbed, lower in the high floodplain and much lower in the river terrace, and it was the lowest in the low floodplain. The difference in the content and vertical distribution of DOC between the riverbed and the three riparian wetlands was significant, while it was not significant among the low floodplain, the high floodplain and the river terrace. The variability of soil DOC was related to the hydrological connectivity between different landscape position of the riparian wetlands and the adjacent stream. Extremely significant correlations were observed between DOC and total organic carbon(TOC), total iron(TFe), ferrous iron(Fe(II)) whose correlation coefficients were 0.819, –0.544 and –0.709 in riparian wetlands of the Naoli River. With the increase of wetland destruction, soil p H increased and soil DOC content changed. The correlation coefficients between soil DOC and TOC, TFe, Fe(II) also changed into 0.759, –0.686 and –0.575 respectively in the Bielahong River. Under the impact of drainage ditches, the correlations between soil DOC and TFe, Fe(II) were not obvious, while the soil p H was weakly alkaline and was negatively correlated with soil DOC in the previous high floodplain. It indicates that riparian hydro-geomorphology is the main factor that could well explain this spatial variability of soil DOC, and the agricultural environmental hydraulic works like ditching also must be considered.

关键词： dissolved organic carbon(DOC) riparian wetlands spatial variation hydro-geomorphologic changes Sanjiang Plain

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

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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)

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

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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

Effect of Wetland Reclamation on Soil Organic Carbon Stability in Peat Mire Soil Around Xingkai Lake in Northeast China

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Chinese Geographical Science 2018年第2期28卷 325-336页

作者： HUO Lili ZOU Yuanchun lyu xianguo ZHANG Zhongsheng WANG Xuehong AN Yi Agro-Environmental Protection Institute of Ministry of Agriculture Tianjin 300191China Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China Joint Key Laboratory of Changbai Mountain Wetland and Ecology Jilin ProvinceChangchun 130102China

Content and density of soil organic carbon(SOC) and labile and stable SOC fractions in peat mire soil in wetland, soybean field and rice paddy field reclaimed from the wetland around Xingkai Lake in Northeast China were studied. Studies were designed to investigate the impact of reclamation of wetland for soybean and rice farming on stability of SOC. After reclamation, SOC content and density in the top 0–30 cm soil layer decreased, and SOC content and density in soybean field were higher than that in paddy field. Content and density of labile SOC fractions also decreased, and density of labile SOC fractions and their ratios with SOC in soybean field were lower than that observed in paddy field. In the 0–30 cm soil layer, densities of labile SOC fractions, namely, dissolved organic carbon(DOC), microbial biomass carbon(MBC), readily oxidized carbon(ROC) and readily mineralized carbon(RMC), in both soybean field and paddy field were all found to be lower than those in wetland by 34.00% and 13.83%, 51.74% and 35.13%, 62.24% and 59.00%, and 64.24% and 17.86%, respectively. After reclamation, SOC density of micro-aggregates(< 0.25 mm) as a stable SOC fraction and its ratio with SOC in 0–5, 5–10, 10–20 and 20–30 cm soil layers increased. SOC density of micro-aggregates in the 0–30 cm soil layer in soybean field was 50.83% higher than that in paddy field. Due to reclamation, SOC density and labile SOC fraction density decreased, but after reclamation, most SOC was stored in a more complex and stable form. Soybean farming is more friendly for sustainable SOC residence in the soils than rice farming.

关键词： soil organic carbon soil organic carbon fractions soil organic carbon stability reclamation wetland

Effects of Crude Oil Contamination on Soil Physical and Chemical Properties in Momoge Wetland of China

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Chinese Geographical Science 2013年第6期23卷 708-715页

作者： WANG Ying FENG Jiang LIN Qianxin lyu xianguo WANG Xiaoyu WANG Guoping Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Key Laboratory for Wetland Ecology and Vegetation Restoration of National Environmental Protection Northeast Normal University Department of Oceanography & Coastal Sciences School of the Coast and EnvironmentLouisiana State University

Large oilfields are often coincidentally located in major river deltas and wetlands,and potentially damage the structure,function and ecosystem service values of wetlands during oil *** the present study,the effects of crude oil contamination during oil exploration on soil physical and chemical properties were investigated in marshes of the Momoge National Nature Reserve in Jilin Province,*** concentrations of total petroleum hydrocarbons in the marsh soil near the oil wells are significantly higher than those in the adjacent control *** water contents in oil-contaminated marshes are negatively correlated with soil temperature and are significantly lower than those in the control area,especially in *** oil contamination significantly increases the soil pH up to8.0,and reduces available phosphorus concentrations in the *** concentrations of total organic carbon are significantly different among sampling ***,crude oil contamination could potentially alkalinize marsh soils,adversely affect soil fertility and physical properties,and cause deterioration of the marshes in the Momoge National Nature ***-remediation by planting Calamagrostis angustifolia has the potential to simultaneously restore and remediate the petroleum hydrocarbon-contaminated *** oil contamination affects the soil physical and chemical properties,so developing an effective restoration program in the Momoge wetland is neccesary.

关键词： crude oil contamination marsh soil oilfield in marshes soil physical and chemical properties wetland Momoge National Nature Reserve

Effects of Vegetation Type on Surface Elevation Change in Liaohe River Delta Wetlands Facing Accelerated Sea Level Rise

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Chinese Geographical Science 2017年第5期27卷 810-817页

作者： WANG Guodong WANG Ming JIANG Ming lyu xianguo HE Xingyuan WU Haitao Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Key Laboratory of Wetland Ecology and Vegetation Restoration of National Environmental Protection Northeast Normal University

Rising sea levels threaten the sustainability of coastal wetlands around the globe. The ability of coastal marshes to maintain their position in the intertidal zone depends on the accumulation of both organic and inorganic materials, and vegetation is important in these processes. To study the effects of vegetation type on surface elevation change, we measured surface accretion and elevation change from 2011 to 2016 using rod surface elevation table and feldspar marker horizon method （RSET-MH） in two Phragmites and two Suaeda marshes in the Liaohe River Delta. The Phragmites marshes exhibited higher rates of surface accretion and elevation change than the Suaeda marshes. The two Phragmites marsh sites had average surface elevation change rates at 8.78 mm/yr and 9.26 mm/yr and surface accretion rates at 17.56 mm/yr and 17.88 mm/yr, respectively. At the same time, the two Suaeda marsh sites had average surface elevation change rates at 5.77 mmJyr and 5.91 mm/yr and surface accretion rates at 13.42 mm/yr and 14.38 mm/yr, respectively. The elevation change rates in both the Phragmites marshes and the Suaeda marshes in the Liaohe River Delta could keep pace and even continue to gain elevation relative to averaged sea level rise in the Bohai Sea reported by the 2016 State Oceanic Administration, Peo- ple＇s Republic of China projection （2.4-5.5 mm/yr） in current situations. Our data suggest that vegetation is important in the accretionary processes and vegetation type could regulate the wetland surface elevation. However, the vulnerability of coastal wetlands in the Liaohe River Delta need further assessment considering the accelerated sea level rise, the high rate of subsidence, and the declining sediment delivery, especially for the Suaeda marshes.

关键词： sea level rise wetland elevation surface accretion Phragmites marsh Suaeda marsh Liaohe River Delta

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

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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

Evolution of Potential Spatial Distribution Patterns of Carex Tussock Wetlands Under Climate Change Scenarios,Northeast China

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Chinese Geographical Science 2022年第1期32卷 142-154页

作者： QI Qing ZHANG Mingye TONG Shouzheng LIU Yan ZHANG Dongjie ZHU Guanglei lyu xianguo Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologChinese Academy of SciencesChangchunJilin 130102China Shijiazhuang University ShijiazhuangHebei 050035China Binzhou University BinzhouShandong 256600China

Carex tussock plays an important role in supporting biodiversity and carbon sequestration of wetland ecosystems,while it is highly threatened by climate change and anthropogenic ***,identifying the potential distribution patterns of Carex tussocks wetland is vital for their targeted conservation and *** current and future(2050s and 2070s)potential habitats distribution of Carex tussocks in Northeast China were predicted using a Maximum Entropy(Maxent)model based on 68 current data of Carex tussock distributions and three groups of environmental variables(bioclimate,topography,soil properties).Results show that isothermality,seasonal precipitation variability and altitude are important factors that determine the distribution of Carex *** high suitable habitat of Carex tussock is about 5.7×10^(4)km^(2) and mainly distributed in the Sanjiang Plain,Songnen Plain,Changbai Mountains and Da Hinggan *** area of stable habitats of Carex tussock is significantly higher than the lost and expanded habitats in the future climate scenarios,and the unsuitable habitats mainly occur in Da Hinggan Mountains,Xiao Hinggan Mountains and Changbai ***,Carex tussock wetlands at high altitude and high latitude are more sensitive to climate change,and more attention should be invested in high latitude and high altitude areas.

关键词： Carex tussock wetland spatial distribution climate change Maxent model suitable habitat