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Transfer and Transformation of Soil Iron and Implications for Hydrogeomorpholocial Changes in Naoli River Catchment, Sanjiang Plain, Northeast China

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Chinese Geographical Science 2011年第2期21卷 149-158页

作者： JIANG Ming LU Xianguo WANG Hongqing zou yuanchun WU Haitao Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130012 China National Wetland Research Center USGS Lafayette Louisiana 70506 USA

Wetland soils are characterized by alternating redox process due to the fluctuation of waterlogged conditions. Iron is an important redox substance, and its transfer and transformation in the wetland ecosystem could be an effective indicator for the environment changes. In this paper, we selected the Naoli River catchment in the Sanjiang Plain, Northeast China as the study area to analyze the dynamics of transfer and transformation of soil iron, and the relationship between iron content change and environmental factors. The results show that the total and crystalline iron contents reach the peak in the depth of 60 cm in soil profile, while the amorphous iron content is higher in the topsoil. In the upper reaches, from the low to high landscape positions, the total and crystalline iron contents decrease from 62.98 g/kg to 41.61 g/kg, 22.82 g/kg to 10.53 g/kg respectively, while the amorphous iron content increases from 2.42 g/kg to 8.88 g/kg. Amorphous iron content has positive correlation with organic matter and soil water contents, while negative correlation with pH. Moreover, both the crystalline and amorphous iron contents present no correlation with total iron content, indicating that environmental factors play a more important role in the transfer and transformation of iron other than the content of the total iron. Different redoximorphic features were found along the soil profile due to the transfer and transformation of iron. E and B horizons of wetland soil in the study area have a matrix Chroma 2 or less, and all the soil types can meet the criteria of American hydric soil indicators except albic soil.

关键词： wetland soil landscape position hydrogeomorpholocial condition redoximorphic feature iron

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

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

Isotopic evidence for soil water sources and reciprocal movement in a semi-arid degraded wetland:Implications for wetland restoration

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Fundamental Research 2023年第6期3卷 861-867页

作者： yuanchun zou Sijian Zhang Xiaofei Yu Guobin Fu Xianguo Lu Heilongjiang Xingkai Lake Wetland Ecosystem National Observation and Research Station&Key Laboratory of Wetland Ecology and Environment&Jilin Provincial Joint Key Laboratory of Changbai Mountain Wetland and Ecology Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China State Environmental Protection Key Laboratory for Wetland Conservation and Vegetation Restoration&Jilin Provincial Key Laboratory of Ecological Restoration and Ecosystem Management&Key Laboratory of Vegetation Ecology of Ministry of Education School of EnvironmentNortheast Normal UniversityChangchun 130117China CSIRO Land and Water Private Bag 5WembleyWA 6913Australia

Understanding water dynamics is a prerequisite for the restoration of degraded ecosystems in arid and semiarid *** this study,we carried out δD and δ^(18)O analyses of precipitation,unsaturated soil water,overland flow,surface runoff,and groundwater samples from a seasonally flooded wetland in the Momoge National Nature Reserve of the Songnen Plain,Northeast China,to identify the water sources and understand the mechanisms of unsaturated soil water *** soil water content(W/W%)at every 20 cm along with a soil profile(0–100 cm)was collected during the growing season,and the HYDRUS-1D model was used to simulate temporal-spatial *** results showed that the local meteoric water line(δD=5.90δ18O-7.34,R2=0.95)had a smaller slope and intercept than the global meteoric water line because of strong evaporation at our study site under semi-arid *** groundwater was partly recharged by local precipitation via overland flow and unsaturated soil water *** soil water was sourced from both precipitation and groundwater with variations at different *** upper soil layer at 0–15 cm was mainly sourced from limited precipitation,while the groundwater could move up to a 25 cm layer during the dry *** unsaturated soil water content increased with soil depth in the top 40 cm,decreased at depths of 40 to 80 cm,and increased again at depths of 80 to 100 *** HYDRUS-1D model could simulate the unsaturated soil water dynamics well in the upper(0–40 cm)and lower(80–100 cm)sections,but poorly for depths of 40–80 cm due to the upward and downward *** bidirectional unsaturated soil water movement highlights the importance of capillary groundwater for wetland plants with similar climatic or hydrogeological conditions.

关键词： Water stable isotopes Unsaturated soil water sourcing HYDRUS-1D Degraded wetland restoration Songnen Plain

Iron Regulation of Wetland Vegetation Performance Through Synchronous Effects on Phosphorus Acquisition Efficiency

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Chinese Geographical Science 2018年第2期28卷 337-352页

作者： JIA Xueying TIAN Zhijie QIN Lei ZHANG Linlin zou yuanchun JIANG Ming LYU Xianguo Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China University of Chinese Academy of Sciences.Beijing 100049 China Joint Key Lab of Changbaishan Wetland and Ecology Jilin ProvinceChangchun 130102China

Iron-rich groundwater flowing into wetlands is a worldwide environmental pollution phenomenon that is closely associated with the stability of wetland ecosystems. Combined with high phosphorus(P) loading from agricultural runoff, the prediction of the evolution of wetland vegetation affected by compound contamination is particularly urgent. We tested the effects of anaerobic iron-rich groundwater discharge in a freshwater marsh by simulating the effect of three levels of eutrophic water on native plants(Glyceria spiculosa(Fr. Schmidt.) Rosh.). The management of wetland vegetation with 1–20 mg/L Fe input is an efficient method to promote the growth of plants, which showed an optimum response under a 0.10 mg/L P surface water environment. Iron-rich groundwater strongly affects the changes in ecological niches of some wetland plant species and the dominant species. In addition, when the P concentration in a natural body of water is too high, the governance effect of eutrophication might not be as expected. Under iron-rich groundwater conditions, the δ^(13)C values of organs were more depleted, which can partially explain the differences in δ^(13)C in the soil profile. Conversely, the carbon isotope composition of soil organic carbon is indicative of past changes in vegetation. The results of our experiments confirm that iron-rich groundwater discharge has the potential to affect vegetation composition through toxicity modification in eutrophic environments.

关键词： iron-rich groundwater wetland vegetation phosphorus (P) eutrophication

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

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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

Dissimilatory iron reduction contributes to anaerobic mineralization of sediment in a shallow transboundary lake

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Fundamental Research 2023年第6期3卷 844-851页

作者： Yuxiang Yuan Cong Ding Haitao Wu Xue Tian Min Luo Weiyi Chang Lei Qin Liang Yang yuanchun zou Kaikai Dong Xiaoyan Zhu Ming Jiang Marinus L.Otte Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China Key Laboratory of Songliao Aquatic Environment Ministry of EducationJilin Jianzhu UniversityChangchun 130118China College of Environment and Safety Engineering Fuzhou UniversityFuzhou 350108China Shandong Key Laboratory of Eco-Environmental Science for the Yellow River Delta Binzhou UniversityBinzhou 256603China Wet Ecosystem Research Group Biological SciencesDepartment 2715North Dakota State UniversityFargo 58108-6050United States

Dissimilatory iron reduction(DIR)coupled with carbon cycling is increasingly being recognized as an influential process in freshwater wetland soils and *** role of DIR in organic matter(OM)mineralization,however,is still largely unknown in lake sediment *** this study,we clarified rates and pathways of OM mineralization in two shallow lakes with seasonal hydrological connectivity and different eutrophic *** found that in comparison with the domination of DIR(55%)for OM mineralization in Lake Xiaoxingkai,the contribution of methanogenesis was much higher(68%)in its connected lake(Lake Xingkai).The differences in rates and pathways of sediment OM mineralization between the two lakes were attributed to higher concentrations of carbonate associated iron oxides(Fecarb)in Lake Xiaoxingkai compared to Lake Xingkai(P=0.002),due to better deposition mixing,more contributions of terrigenous detrital materials,and higher OM content in Lake *** of structural equation modeling showed that Fecarb and total iron content(TFe)regulated 25%of DIR in Lake Xiaoxingkai and 76%in Lake Xingkai,accompanied by a negative effect of TFe on methanogenesis in Lake *** relative abundance and diversity of Fe-reducing bacteria were significantly different between the two lakes,and showed a weak effect on sediment OM *** findings emphasize the role of iron minerals and geochemical characterizations in regulating rates and pathways of OM mineralization,and deepen the understanding of carbon cycling in lake sediments.

关键词： Dissimilatory iron reduction Organic matter mineralization Methane production Iron oxides Carbon cycling

模拟气候变化背景下铁输入对小兴凯湖狭叶甜茅生理生态的影响

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生态学报 2017年第14期37卷 4725-4733页

作者：贾雪莹邹元春姜明中国科学院湿地生态与环境重点实验室中国科学院东北地理与农业生态研究所长春130102 中国科学院大学北京100049

富铁地下水从农田流入湿地生态系统是近些年来湿地所面临的环境问题之一,在气候变化背景下更为复杂。通过湿地微生境人工模拟实验,研究铁输入、温度和水位3因素对兴凯湖湿地植物优势物种——狭叶甜茅(Glyceria spiculosa(***.)Rosh.)整... 详细信息

富铁地下水从农田流入湿地生态系统是近些年来湿地所面临的环境问题之一,在气候变化背景下更为复杂。通过湿地微生境人工模拟实验,研究铁输入、温度和水位3因素对兴凯湖湿地植物优势物种——狭叶甜茅(Glyceria spiculosa(***.)Rosh.)整个生长周期生理生态的影响。对狭叶甜茅的株高、叶片数目、基茎、叶面积,叶片叶绿素a、b,地上生物量及其总氮(TN)、总碳(TC)、总磷(TP)、总铁(TFe)含量的分析测试结果表明:(1)温度为主要影响因素,降温2℃效果明显且对株高、叶片数目和叶面积最显著。对照温度处理叶绿素a、b值最大,主要为生长速度相对缓慢而造成叶绿素聚集在细胞中导致浓度较高。(2)水位对狭叶甜茅基茎、地上部分总铁含量影响最显著,5 cm淹水处理更有利于地上部分总铁含量富集。(3)3个铁输入强度对狭叶甜茅生理生态各指标没有达到显著水平。综合各指标特征加权分析表明,温度升高对其生长产生不利影响,降温2℃处理植物表现出良好的适应性,淹水及铁输入条件下其生长状况显著增强,以目前小兴凯湖外源铁输入强度情况下湿地植物铁含量会有所增加。可以推测,在全球变暖趋势下,狭叶甜茅这种对气候变化敏感的物种,其生存将面临一定的威胁。

关键词：温度水位铁输入气候变化小兴凯湖

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组织忘记、组织学习与企业动态能力

科研管理 2010年第1期31卷 33-37,45页

作者：潘安成邹媛春大连理工大学管理学院辽宁大连116024

组织惰性阻碍企业动态能力产生与增强,而组织忘记和学习可以解除组织惰性的束缚。本文首先剖析了组织忘记和学习对动态能力的影响,并建立了模型,进而论述它们之间关系,指出组织学习产生企业动态能力,而组织忘记和学习进一步促进和增强... 详细信息

组织惰性阻碍企业动态能力产生与增强,而组织忘记和学习可以解除组织惰性的束缚。本文首先剖析了组织忘记和学习对动态能力的影响,并建立了模型,进而论述它们之间关系,指出组织学习产生企业动态能力,而组织忘记和学习进一步促进和增强企业动态能力;并运用案例进行验证。

关键词：动态能力组织忘记组织学习