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Composition regulates dissolved organic matter adsorption onto iron (oxy)hydroxides and its competition with phosphate: Implications for organic carbon and phosphorus immobilization in lakes

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Journal of Environmental Sciences 2024年第10期144卷 159-171页

作者： ShuaiLong Wen JingJing Liu YueHan Lu JiaRu Dai XiuLin Huang ShiLin An Erik Jeppesen ZhengWen Liu YingXun Du State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Molecular Eco-Geochemistry(MEG)Laboratory Department of Geological SciencesThe University of Alabama2017th AveTuscaloosaAL 35485USA School of Environmental Science and Engineering Nanjing Tech UniversityNanjing 210008China School of Environmental and Chemical Engineering Chongqing Three Gorges UniversityChongqing 404020China Department of Ecoscience Aarhus UniversitySilkeborg 8600Denmark Sino-Danish Centre for Education and research University of Chinese Academy of SciencesBeijing 101408China limnology Laboratory Department of Biological Sciences and Centre for Ecosystem Research and ImplementationMiddle East Technical UniversityAnkara 06800Turkey

Dissolved organicmatter(DOM)is a heterogeneous pool of compounds and exhibits diverse adsorption characteristics with or without phosphorous(P)*** impacts of these factors on the burial and mobilization of organic carbon and P in aquatic ecosystems remain *** this study,an algae-derived DOM(ADOM)and a commercially available humic acid(HA)with distinct compositions were assessed for their adsorption behaviors onto iron(oxy)hydroxides(FeOx),both in the absence and presence of *** contained less aromatics but more protein-like and highly unsaturated structures with oxygen compounds(HUSO)than *** adsorption capacity of FeOx was significantly greater for ADOM than for ***-like and HUSO compounds in ADOM and humic-like compounds and macromolecular aromatics in HA were preferentially adsorbed by ***,ADOM demonstrated a stronger inhibitory effect on phosphate adsorption than *** observation suggests that the substantial release of autochthonous ADOM by algae could elevate internal P loading and pose challenges for the restoration of restore eutrophic *** presence of phosphate suppressed the adsorption of protein-like compounds in ADOM onto FeOx,resulting in an increase in the relative abundance of protein-like compounds and a decrease in the relative abundance of humic-like compounds in post-adsorption *** contrast,phosphate exhibited no discernible impact on the compositional fractionation of ***,our results show the source-composition characters of DOM influence the immobilization of both DOM and P in aquatic ecosystems through adsorption *** preferential adsorption of proteinaceous compounds within ADOM and aromatics within HA highlights the potential for the attachment with FeOx to diminish the original source-specific signatures of DOM,thereby contributing to the shared DOM characteristics observed across diverse aquatic environments.

关键词： Algal dissolved organic matter Humic acid Adsorption Phosphate Fractionation FT-ICR MS

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Molecular properties of dissolved organic matter across Earth systems: A meta-analysis

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Journal of Earth Science 2024年

作者： Lei Han Ang Hu Hellen Lucas Mzuka Xingting Chen Ji Shen Jianjun Wang Key Laboratory of Lake and Watershed Science for Water Security， Nanjing institute of Geography and limnology， Chinese Academy of Sciences School of Geography and Ocean Science， Nanjing University

Dissolved organic matter （DOM） represents the largest pool of reactive carbon on the Earth and plays a crucial role in various biogeochemical processes and ecosystem functions. However， it is understudied for a global understanding of DOM molecular properties such as molecular weight， stoichiometry， and oxidation state， and the linkages among them across Earth systems. Here， a meta-analysis of 2，707 sites in 204 literatures was conducted by synthesizing four representative molecular properties of DOM， i.e.， mass， double bond equivalent （DBE）， modified aromaticity index (AImod)， and nominal oxidation state of carbon （NOSC）. By exploring H/C and O/C ratios， we examined the relationships among these DOM properties across waters and land systems， and their geographical patterns and environmental drivers. We found that， compared to land system， the mass， DBE， and AImodwere all significantly higher in water systems， with river sediments exhibiting the highest values. DOM oxidation state indicated by NOSC was greater on average in wastewater （NOSC = 0.226 ± 0.06） and marine water （NOSC = 0.133 ± 0.06） than in other habitats. Compared to waters， the mass in land system showed more strongly positive correlations with oxidation states such as NOSC and O/C， and the NOSC showed stronger relations to bioavailability properties such as DBE， AImod， and H/C. Among all the properties， H/C and AImodcontributed to the most variations in global DOM properties. In waters， NOSC monotonically increased towards high latitudes， while DBE and AImodshowed significant hump-shaped patterns indicating peaked unsaturation and aromaticity at mid-latitudes of approximately absolute 30°-50°. The variations in DOM properties were significantly correlated with environmental factors such as annual mean temperature and pH. Collectively， we revealed the spatial distribution and environmental drivers of DOM molecular properties across Earth ecosystems， which could shed light on our comprehensive understan

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Carbon sink response of terrestrial vegetation ecosystems in the Yangtze River Delta and its driving mechanism

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Journal of Geographical Sciences 2024年第1期34卷 112-130页

作者： ZHAO Haixia FAN Jinding GU Binjie CHEN Yijiang Nanjing institute of Geography and limnology CASNanjing 210008China School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009JiangsuChina Nanjing College University of Chinese Academy of SciencesNanjing 211135China School of Agricultural and Food Science The University of QueenslandQueensland 4072Australia

The carbon cycle of terrestrial ecosystems is influenced by global climate change and human *** remote sensing data and land cover products,the spatio-temporal variation characteristics and trends of NEP in the Yangtze River Delta from 2000 to 2020 were analyzed based on the soil respiration *** driving influences of ecosystem structure evolution,temperature,rainfall,and human activities on NEP were *** results show that the NEP shows an overall distribution pattern of high in the southeast and low in the *** area of carbon sinks is larger than that of the carbon *** spatial heterogeneity is *** change trend is basically unchanged or significantly *** future change trend in most areas will be continuous *** with temperature,NEP are more sensitive to *** positive influence of human activities on NEP is mainly observed in north-central Anhui and northern Jiangsu coastal areas,while the negative influence is mainly found in highly urbanized *** the process of ecosystem structure,the contribution of unchanged areas to NEP change is greater than that of changed areas.

关键词： carbon sinks terrestrial vegetation ecosystems driving mechanisms climate change human activities ecosystem structure Yangtze River Delta

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Planetary Homeostasis of Reactive Nitrogen Through Anaerobic Ammonium Oxidation

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Engineering 2024年第7期38卷 175-183页

作者： Guibing Zhu Bangrui Lan Shuci Liu Cameron M.Callbeck Shanyun Wang Liping Jiang Asheesh Kumar Yadav Jan Vymazal Mike S.M.Jetten Ganlin Zhang Yongguan Zhu research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China Department of Environment and Science Queensland GovernmentBrisbaneQLD 4102Australia Department of Environmental Sciences University of BaselBasel 4056Switzerland CSIR-institute of Minerals and Materials Technology Bhubaneswar 751013India Faculty of Environmental Sciences Czech University of Life Sciences PraguePraha 16521Czech Republic Department of Microbiology Radboud UniversityNijmegen 6525 XZThe Netherlands Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China

The availability of nitrogen(N)is crucial for both the productivity of terrestrial and aquatic ecosystems ***,the overuse of artificial fertilizers and the energy required to fix nitrogen have pushed the global nitrogen cycle(N-cycle)past its safe operating limits,leading to severe nitrogen pollution and the production of significant amounts of greenhouse gas nitrous oxide(N2O).The anaerobic ammonium oxidation(anammox)mechanism can counteract the release of ammonium and N2O in many oxygenlimited situations,assisting in the restoration of the homeostasis of the Earth’s N *** this work,we looked into the characteristics of the anammox hotspots’distribution across various types of ecosystems *** hotspots are present at diverse oxic-anoxic interfaces in terrestrial systems,and they are most prevalent at the oxic-anoxic transition zone in aquatic *** on the discovery of an anammox hotspot capable of oxidizing ammonium anoxically into N2 without N2O by-product,we then designed an innovative concept and technical routes of nature-based anammox hotspot geoengineering for climate change,biodiversity loss,and efficient utilization of water *** 15 years of actual use,anammox hotspot geoengineering has proven to be effective in ensuring clean drinking water,regulating the climate,fostering plant and animal diversity,and enhancing longterm environmental *** sustainable biogeoengineering of anammox could be a workable natural remedy to resolve the conflicts between environmental pollution and food security connected to N management.

关键词： Biogeochemical N-cycle Oxic-anoxic interface Nature-based solution Biogeoengineering Nitrogen sustainable development

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Land use and river-lake connectivity: Biodiversity determinants of lake ecosystems

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Environmental Science and Ecotechnology 2024年第5期21卷 329-340页

作者： Huiyu Xie Yu Ma Xiaowei Jin Shiqi Jia Xu Zhao Xianfu Zhao Yongjiu Cai Jian Xu Fengchang Wu John P.Giesy State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing100012China College of Water Sciences Beijing Normal UniversityBeijing100875China China National Environmental Monitoring Centre Beijing100012China Key Laboratory of Ecological Impacts of Hydraulic-Projects and Restoration of Aquatic Ecosystem of Ministry of Water Resources Institute of HydroecologyMinistry of Water Resources and Chinese Academy of SciencesWuhan430079China Nanjing institute of Geography and limnology Chinese Academy of SciencesNanjing210008China Department of Integrative Biology Michigan State UniversityEast LansingMI48895USA Department of Veterinary Biomedical Sciences and Toxicology Centre University of SaskatchewanSaskatoonSaskatchewanS7N 5B3Canada Toxicology Centre and Department of Veterinary Biomedical Sciences University of Saskatchewan44 Campus DriveSaskatoonSKS7N 5B3SaskatoonSKCanada

Lake ecosystems confront escalating challenges to their stability and resilience,most intuitively leading to biodiversity loss,necessitating effective preservation strategies to safeguard aquatic ***,the complexity of ecological processes governing lake biodiversity under multi-stressor interactions remains an ongoing concern,primarily due to insufficient long-term bioindicator data,particularly concerning macroinvertebrate *** we utilize a unique,continuous,and in situ biomonitoring dataset spanning from 2011 to 2019 to investigate the spatio-temporal variation of macroinvertebrate *** assess the impact of four crucial environmental parameters on Lake Dongting and Lake Taihu,i.e.,water quality,hydrology,climate change,and land *** two systems are representative of lakes with Yangtze-connected and disconnected subtropical floodplains in *** find an alarming trend of declining taxonomic and functional diversities among macroinvertebrate communities despite improvements in water *** contributing factors to this decline include persistent anthropogenic pressures,particularly alterations in human land use around the lakes,including intensified nutrient loads and reduced habitat ***,river-lake connectivity is pivotal in shaping differential responses to multiple *** results highlight a strong correlation between biodiversity alterations and land use within a 2e5 km radius and 0.05e2.5 km from the shorelines of Lakes Dongting and Taihu,*** findings highlight the importance of implementing land buffer zones with specific spatial scales to enhance taxonomic and functional diversity,securing essential ecosystem services and enhancing the resilience of crucial lake ecosystems.

关键词： Taxonomic richness Functional diversity Biotic homogenization River-lake connectivity Multiple stressors

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Observations and modeling of the ice-ocean conditions in the coastal Chukchi and Beaufort Seas

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Acta Oceanologica Sinica 2008年第3期27卷 79-87页

作者： JIN Meibing WANG Jia MIZOBATA Kohei HU Haoguo SHIMADA Koji International Arctic research Center University of Alaska Fairbanks AK 99775-7340 USA NOAA Great Lakes Environmental Research Laboratory Ann Arbor MI 48105 USA Tokyo University of Marine Science and Technology 4-5-7 Kounan Minato-ku Tokyo 108-8477 Japan cooperative institute for limnology and ecosystems research School of Natural Resources and Environment University of MichiganAnn Arbor MI USA

The Chukchi and Beaufort Seas include several important hydrological features： inflow of the Pacific water, Alaska coast current （ ACC ）, the seasonal to perennial sea ice cover, and landfast ice ＇along the Alaskan coast. The dynamics of this coupled ice-ocean system is important for both regional scale oceanography and large-scale global climate change research. A mumber of moorings were deployed in the area by JAMSTEC since 1992, and the data revealed highly variable characteristics of the hydrological environment. A regional high-resolution coupled ice-ocean model of the Chukchi and Beaufort Seas was established to simulate the ice-ocean environment and unique seasonal landfast ice in the coastal Beaufort Sea. The model results reproduced the Beaufort gyre and the ACC. The depthaveraged annual mean ocean currents along the Beaufort Sea coast and shelf hreak compared well with data from four moored ADCPs, but the simulated velocity had smaller standard deviations, which indicate small-scale eddies were frequent in the region. The model resuits captured the sea,real variations of sea ice area as compared with remote sensing data, and the simulated sea ice velocity showed an ahnost stationary area along the Beaufort Sea coast that was similar to the observed landfast ice extent. It is the combined effects of the weak oceanic current near the coast, a prevailing wind with an onshore component, the opposite direction of the ocean current, and the blocking hy the coastline that make the Beaufort Sea coastal areas prone to the formation of landfast ice.

关键词： circulation sea ice fast ice Beaufort Sea coupled ice-ocean model

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Negative effects of Microcystis blooms on the crustacean plankton in an enclosure experiment in the subtropical China

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Journal of Environmental Sciences 2005年第5期17卷 775-781页

作者： CHEN Fei-zhou XIE Ping TANG Hui-juan LIU Hong Donghu Experimental Station of Lake ecosystems State Key Laboratory for Freshwater Eeology and Biotechnology of China Institute of Hydrobiology Chinese Academy of Sciences Wuhan 430072 China Nanjing institute of Geography and limnology Chinese Academy of Sciences Nanjing 210008 China

Effects of Microcystis blooms on the crustacean plankton were studied using enclosure experiments during July-September, 2000. Eight enclosures were set in the hypereutrophic Donghu Lake. Different nutrient concentrations through additional nutrient and sediment in enclosures were expected to result in different abundance of Microcystis. From July to early August, the phytoplankton community was dominated by Chlorophyta, Cryptophyta, Bacillariophyta and Cyanophyta other than Microcystis aeruginosa. M. aeruginosa showed a rapid increase during early August in all enclosures and predominated. Crustacean plankton was dominated by the herbivorous Moina micrura, Diaphanosoma brachyurum and Ceriodaphnia cornuta, and the predaceous Mesocyclops sp. and Thermocyclops taihokuensis. During the pre-bloom period, the dynamics of M. micrura population appeared to be mainly affected by the predaceous cyclopoids. With the development of Microcystis blooms, such interaction between M. micrura and cyclopoids seemed weakened, especially when the Microcystis biomass was high. But there was no apparent influence on the interaction between Leptodora kindti and its zooplanktonic prey. The density of two cyclopoids decreased with the enhancement of Microcystis. The density decline of M. micrura was caused by both predation and inhibition by Microcystis. The low food availability of other edible phytoplankton during the blooms led to low densities of both C. cornuta and D. brachyurum by late August. It appears that dense Microcystis blooms exert strong negative effects on the herbivorous cladocerans and the predaceous cyclopoids.

关键词： crustacean plankton cladocerans cyclopoids food availability Microcystis bloom

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Modeling the ocean circulation in the Bering Sea

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Chinese Journal of Polar Science 2008年第2期19卷 193-211页

作者： Hu Haoguo Wang Jia cooperative institute for limnology and ecosystems research （ciler） School of Natural Resources and Environment （SNRE） University of Michigan 4840 S State Road Ann Arbor Michigan 48108 USA NOAA Great Lakes Environmental research Laboratory （GLERL） 4840 S State Road Ann Arbor Michigan 48108 USA

With parameterized wave mixing, the circulation and the tidal current in the Bering Sea were simulated simultaneously using the three-dimensional Princeton Ocean Model. The simulated circulation pattern in the deep basin is relatively stable, cyclonic, and has little seasonal change. The Bering Slope Current between 200-1000 m isobaths was estimated to be 5 Sv in volume transport. The Kamchatka Current was estimated to be 20 Sv off the Kamchatka Peninsula. The Bering shelf circulations vary with season, driven mainly by wind. These features are consistent with historical esti- mates. A counter current was captured flowing southeastward approximately along the 200 m isobath of the Bering Slope, opposite to the northwestward Bering Slope Current, which needs to be validated by observations. An upwelling current is located in the shelf break （ 120-1000 m） area, which may imply the vertical advection of nutrients for supporting the Bering Sea Green Belt seasonal plankton blooms in the breakslope area. The Bering Slope Current is located in a downwelling area.

关键词： Arctic Ocean the Bering Sea ocean circulation.

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Dynamic foraging strategy adaptation to heterogeneous environments contributes to social aggregation in snub-nosed monkeys

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Zoological research 2024年第1期45卷 39-54页

作者： Lan Zhao Sheng-Nan Ji Xiao-Bing Du Jia-Hui Liu Bo-Lun Zhang Pei-Hua Li Yi-Jun Yang Bao-Guo Li Yan-Qing Guo Xiao-Guang Qi College of Life Sciences Northwest UniversityXi’anShaanxi 710069China Chengdu institute of Biology Chinese Academy of SciencesChengduSichuan 610041China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China

The dynamics of animal social structures are heavily influenced by environmental patterns of competition and *** folivorous colobine primates,prevailing theories suggest that larger group sizes should be favored in rainforests with a year-round abundance of food,thereby reducing feeding ***,paradoxically,larger groups are frequently found in high-altitude or high-latitude montane ecosystems characterized by a seasonal scarcity of *** contradiction is posited to arise from cooperative benefits in heterogeneous *** investigate this hypothesis,we carried out a six-year field study on two neighboring groups of golden snub-nosed monkey(Rhinopithecus roxellana),a species representing the northernmost distribution of colobine *** showed that the groups adjusted their movement and habitat selection in response to fluctuating climates and spatiotemporal variability of resources,indicative of a dynamic foraging ***,during the cold,resource-scarce conditions in winter,the large group occupied food-rich habitats but did not exhibit significantly longer daily travel distances than the smaller neighboring ***,we compiled an eco-behavioral dataset of 52 colobine species to explore their evolutionary *** of this dataset suggested that the increase in group size may have evolved via home range expansion in response to the cold and heterogeneous climates found at higher altitudes or ***,we developed a multi-benefits framework to interpret the formation of larger groups by integrating environmental *** cold and diverse environments,even smaller groups require larger home ranges to meet their dynamic survival *** spatiotemporal distribution of high-quality resources within these expanded home ranges facilitates more frequent interactions between groups,thereby encouraging social aggregation into larger *** process enhances the benefits of collabor

关键词： Social evolution Folivore paradox MLS Rhinopithecus roxellana Multi-benefits framework

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Surface energy balance on the Antarctic plateau as measured with an automatic weather station during 2014

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Advances in Polar Science 2019年第2期30卷 93-105页

作者： DING Minghu Anubha AGRAWAL Petra HEIL YANG Diyi State Key Laboratory of Severe Weather and institute of Polar Meteorology Chinese Academy of Meteorological Sciences Beijing 100081 China Antarctic Climate & ecosystems cooperative research Centre Hobart Tasmania Australia

AWS data during 2014 collected at PANDA-N station, on the East Antarctic Plateau, are analysed. Net Short Wave Radiation(QSWR), net Long Wave Radiation(QLWR), sensible(QH), latent(QL) and subsurface or ground(QG) heat fluxes are computed. Annual averages for QSWR, QLWR, QH, QL and QG of 19.65,-49.16, 26.40,-0.77 and 3.86 W·m-2 were derived based on an albedo value of 0.8. QSWR and QH are the major sources of heat gain to the surface and QLWR is the major component of heat loss from the surface. An i terative method is used to estimate surface temperature in this paper;surface temperature of snow/ice is gradually increased or decreased, thereby changing longwave radiation, sensible, latent and subsurface heat fluxes, so that the net energy balance becomes zero. Mass loss due to sublimation at PANDA-N station for 2014 is estimated to be 12.18 mm w.e.·a-1;and mass gain due to water vapour deposition is estimated to be 3.58 mm w.e.·a-1. Thus the net mass loss due to sublimation/deposition is 8.6 mm w.e.·a-1. This study computes surface energy fluxes using a model, instead of direct measurements. Also there are missing data especially for wind speed, though 2 m air temperature data is almost continuously available throughout the year. The uncertainties of albedo, wind speed and turbulent fluxes cause the most probable error in monthly values of QLWR, QH, QL, QG and surface temperature of about ±4%, ±20%, ±50%, ±11% and ±0.74 K respectively.

关键词： energy balance Antarctica surface mass loss CHINARE

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