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Study on the Carbon Storage and Fixation of Phramites autralis in Baiyangdian Demonstration Area

Procedia environmental Sciences 2012年 13卷 324-330页

作者： Wei Dong Jianmin Shu Ping He Guangwen Ma Ming Dong Chinese Research Academy of Environmental Sciences Beijing100012China State Environment Protection key Laboratory of Regional Eco-process and Function Assessment Beijing 100012 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012 China College of Water Sciences Beijing Normal University Beijing 100875 China

Wetland ecosystem occupies an important position in the global carbon cycle with a strong ability of carbon storage and fixation. On the basis of field investigation and laboratory measurement, in the paper, the standing biomass and primary production of wetland Phragmites australis in Baiyangdian were study, and its ability of carbon storage and fixation in accordance with the principle of photosynthesis was measured, and then the potential ability of carbon storage from the perspective of efficiency for solar energy utilization was discussed. The results show that carbon storage of wetland Phragmites australis is large in Baiyangdian with 5.81 kg • m -2 , 7.14 kg • m -2 and 8.72 kg • m -2 respectively; carbon fixation is also very large with 2.54 kg • m -2 , 3.12 kg • m -2 and 3.81 kg • m -2 respectively. In addition, the underground biomass is larger than the aboveground biomass, and the ratio of the two is 2.38-3.30 with the average of 2.90. The underground carbon storage is nearly 3 times as much as the aboveground carbon storage. Wetland Phragmites australis in Baiyangdian has a strong ability of carbon fixation with 1.17 kg • m -2 • a -1 , 1.49 kg • m -2 • a-1 and 1.76 kg • m -2 • a-1 respectively, which is 1.7-3.4 times as much as the average ability of carbon fixation of the national terrestrial plants and 2.0- 4.0 times of that of the global plants.

关键词： Phragmites australis carbon storage and fixation Baiyangdian

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Utilization Rate and Influencing Factors of Wildlife Passages in Xinjiang Protected Area System

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SSRN 2024年

作者： Fu, Mengdi Li, Shuang Wang, Jun Key Laboratory of Regional Eco-Process and Function Assessment and State Environment Protection Chinese Research Academy of Environmental Sciences Beijing100012 China Center for Biodiversity and Nature Reserve Chinese Academy of Environmental Planning Beijing100043 China

The expansion of linear infrastructure represents a significant threat to biodiversity. Given the paucity of research on the systematic conservation of species diversity, it becomes imperative to conduct extensive research on the utilisation of wildlife passages. We selected typical areas within the Xinjiang protected area system for the investigation and monitoring. This involved evaluating the utilization of passages during different periods and identifying the main influencing factors to improve the utilization rate of passages. The objective was to provide basic data support for revealing the interaction mechanism between linear infrastructure such as roads and fences and wild animal activities. The results indicated that 32 species of wild animals were photographed, including 13 species of birds representing 8 families from 5 orders, and 19 species of mammals representing 10 families from 5 orders. The relative abundance index of Cetartiodactyla and Perissodactyla wild animals, including bharal, goitered gazelle, asian wild ass, and wild bactrian camel, was notably high. Utilization rates of the passage at night were significantly higher than at other periods. The wild animals exhibited the highest selectivity for the underpass passage (JSInight=4.08) of the Kalamaili Mountain Ungulate Wildlife Nature Reserve and the fenced passage reserved of the Bosten Lake Scenic Area (JSInight=4.19). Wild animals exhibited a strong preference for the passage during sunrise and sunset, with 86.86% of the monitored plots JSIsunrise>0 and 91.30% of the monitored plots JSIsunset>0. The density of linear infrastructure was a key factor influencing passage utilization, with a significantly negative correlation. This was followed by the intensity of human activities. Furthermore, the larger the passage size and the higher the vegetation coverage, the higher the utilization rate of wildlife passages. It is recommended that the spatial layout and design of wildlife passages be optim

关键词： Fences

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A Comparative Study on Aggregation and Sedimentation of Natural Goethite and Artificial Fe3o4 Nanoparticles in Synthetic and Natural Waters

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SSRN 2022年

作者： Wu, Aiming Zhao, Xiaoli Yang, Chunyan Wang, Junyu Wang, Xia Liang, Weigang Zhou, Lingfeng Teng, Miaomiao Niu, Lin Tang, Zhi Hou, Guoqing Wu, Fengchang College of Environment Hohai University Nanjing210098 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China State Environment Protection Key Laboratory of Regional Eco-Process and Function Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China

Natural iron oxides nanomaterials have important roles in biogeochemical processes. In this study, the effects of pH, natural organic matter, and cations on aggregation and sedimentation of natural goethite and artificial Fe3O4 nanoparticles in water were investigated to learn more about the environmental behaviors of engineered and natural nanomaterials and how they differ. In addition, a novel extended DLVO theory that considered steric, gravitational, and magnetic attraction forces concurrently was specifically developed to provide mechanisms explanations. Specifically, Fe3O4 NPs were more likely than bulk goethite to aggregate (because of magnetic attraction interactions) at low HA concentrations and disperse at high HA concentrations. Besides, goethite was less prone to settle with the same concentration of NaCl than Fe3O4 NPs, but the opposite trend was found for the same concentration of CaCl2 because of the difference in maximum net energy (barrier) and strong Ca2+ bridging effectiveness of goethite in CaCl2 solution. Statistical models were established to evaluate colloidal stability of the particles. XPS and molecular dynamics simulation results suggested that ions were adsorbed onto particles via ionic polarization and that the binding free energies at high coverage followed the order Ca2+ > Na+ > Cl- and presence of cation bridging between particles. © 2022, The Authors. All rights reserved.

关键词： Positive ions

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Redevelopment of urban brownfield sites in China:Motivation,history,policies and improved management

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eco-Environment & Health 2022年第2期1卷 63-72页

作者： Yiming Sun Hong Li Shuo Lei Kirk TSemple Frederic Coulon Qing Hu Jingyang Gao Guanlin Guo Qingbao Gu Kevin C.Jones State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences100012BeijingPR China Lancaster Environment Centre(LEC) Lancaster UniversityLancasterLA14YQUK Centre for Ecology and Hydrology Library AvenueBailriggLancaster LA14APUK State Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment Chinese Research Academy of Environmental Sciences100012BeijingPR China School of Water Energy and EnvironmentCranfield UniversityMK430ALUK Southern University of Science and Technology 518055ShenzhenGuangdongPR China Beijing Huanding Environmental Big Data Institute 100083BeijingPR China Technical Centre for Soil Agricultural and Rural Ecology and EnvironmentMinistry of Ecology and Environment100012BeijingPR China

Rapid urbanisation in China has resulted in an increased demand for land in towns and *** upgrade and modernise,China has also moved many major industries from urban centres to less populated *** the high economic value of urban land,the transformation and utilisation of brownfield areas have become important economically and *** Chinese government has recognised the need for strong frameworks to safeguard soil and groundwater quality,with brownfield sites a key category for *** scientific,regulatory and decision-making frameworks are needed and being adopted to ensure practical,careful and wise use of central and localised government resources,to manage the reuse and regeneration of these brownfield *** paper reviews the context,policies and management procedures of developing brownfield sites in countries with a history of brownfield management and discusses China’s current situation and priorities for brownfield governance and *** include(1)clarification of brownfield site soil contamination risk control standards and risk assessment procedures,(2)the responsibilities of different national and local agencies,(3)the establishment of a national expert committee to advise on best practices,policy and process,(4)the use of registered brownfield databases at national,provincial,municipal and county levels,and(5)the set up of soil pollution prevention fund at the provincial level.

关键词： Brownfield Urban soils Management China USA UK

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Dynamics of Phosphorus Content in the Water-Sediment Interface of Wetlands in a Mid-Temperature Steppe

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Water Environment Research 2024年 2019 Feb 10页

作者： He, Jing Su, Derong Lv, Shihai Diao, Zhaoyan Bu, He Zheng, Zhiron Ye, Shengxing State Environmental Protection Key Laboratory of Regional Eco-Process and Function Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China Grassland Resources and Ecology Research Center Beijing Forestry University Beijing100083 China Huihe National Nature Reserve Authority in Inner Mongolia Hailar021199 China

In order to reveal dynamics changes in phosphorus release from the sediments of wetlands in a mid-temperature steppe without external phosphorus input, the relationship between phosphorus content in the overlying water, sediment, and interstitial water was studied using the variables control method. The results showed that, during the incubation period, the content of total phosphorus in the overlying water and the content of total phosphorus in interstitial water both presented in the order of August > September > July. Furthermore, the correlation relationships between phosphorus content in the overlying water, total phosphorus in the interstitial water, and the ratios of sediment Olsen-P to total phosphorus in the interstitial water, indicated that Olsen-P might be a kind of release form of phosphorus - from the sediment to the overlying water of the wetlands in Hulunbeier steppe, without external phosphorus input. This article is protected by copyright. All rights reserved. This article is protected by copyright. All rights reserved.

关键词： Water content

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Enhanced Nutrient Cycling in Solar Park Induced by Soil Indicator Taxa, Microbial Biomass and Metabolic Efficiency Improve the ecosystem Multifunctionality in Arid Region

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SSRN 2023年

作者： Liu, Yu Ding, Chengxiang Wang, Tiemei Su, Derong Li, Zhuoqing Feng, Chaoyang Quan, Zhanjun Institute of Ecology Chinese Research Academy of Environmental Sciences Beijing100012 China State Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment Beijing100012 China State Key Laboratory of Environmental Criteria and Risk Assessment Beijing100012 China School of Grassland Beijing Forestry University Beijing100083 China Academy of Animal Science and Veterinary Medicine Qinghai University Xining810016 China

The drive towards clean energy sources has prompted the worldwide construction of emerging photovoltaic solar parks. The intense Despite the advantages of lower pollutant and greenhouse gas emissions, the construction of solar parks (SP) is not without environmental and ecological consequences due to changes in land use and impacts on regional climate. Previous studies have reported that SP construction impacts microclimate, plant biomass, biodiversity, soil physicochemical properties, and soil microbial community structure. However, our understanding of how SP influences a wide range of ecosystem functions simultaneously remains incomplete. To address this gap, we assessed the changes in ecosystem multifunctionality (EMF) in SP habitats in arid ecosystem, by measuring twenty-three indicators related to ecosystem functions comprising primary production, soil nutrient pool, carbon cycling, nitrogen cycling, phosphorus cycling and oxidation-reduction. Furthermore, we identified the primary driving factors and regulatory mechanism of EMF in different periods since SP installation. The results showed that SP had positive effects on EMF indices, the positive effect size was higher in initial installation period (5.4%-149.0%) than in constant running period (0.4%-15.3%). The enhancement in EMF were mainly due to the enhanced nutrient cycling induced by increased abundance of fungal indicator taxa (Indicator) as well as microbial biomass and metabolic efficiency (MBM) according to the results of variance decomposition analysis and multiple linear regression. Moreover, the structural equation model revealed distinct regulatory mechanism between the two period, and a transition in the primary driving factors of EMF from Indicator to MBM. Together, our study reveals the different effect size of SP on EMF and changes in driving factor and regulatory mechanism of EMF during the different periods following SP installation. These findings complement the environmental impact analy

关键词： ecosystems

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functional diversity and redundancy of subalpine meadows subjected to anthropogenic disturbances

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Journal of Plant ecology 2021年第5期14卷 870-883页

作者： Xiaoxia Huang Zhilu Sheng Kejian He Yong Zhang Bin Kang Jiao Ding Dongmei Liu Key Laboratory of Atmospheric Environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region School of Earth SciencesYunnan UniversityKunming 650091Cliina State Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment Institute of Ecology ResearchChinese Research Academy of Environmental SciencesBeijing 100012China National Plateau Wetlands Research Center College of WetlandsSoutliwest Forestry UniversityKunming 650224China College of Fisheries Ocean University of ChinaQingdao 266003China Water Conservancy Department of Yunnan Province Kunming 650021China

Aims The aims of this study were to assess how functional diversity(FD)and functional redundancy respond to subalpine meadow ecosystem degradation under anthropogenic disturbance and how species contribute to functional redundancy along the disturbance *** The study was carried out in the subalpine meadow in Mount Jade Dragon,which is located at the southeastern edge of the Tibetan *** disturbance intensities[no disturbance(ND),weak disturbance(WD),moderate disturbance(MD)and severe disturbance(SD)]were *** richness,soil properties and five key plant functional traits were assessed along the disturbance ***’s diversity index,FD based on the Rao algorithm,functional redundancy,community-weighted mean of each functional trait and species-level functional redundancy were *** Findings Unimodal change pattern of FD and functional redundancy along the disturbance gradient were found in the present study,with their maximum in MD and WD,*** diversity showed a decreasing trend with increasing disturbance *** disturbance intensified,species with traits related to conservative growth strategies,such as low specific leaf area(SLA)and high leaf dry matter content(LDMC),decreased,whereas species with resource acquisitive strategies,such as small plant,high SLA and low LDMC,increased in the *** the species level,species showed species-specific roles in functional ***,some species were important in the community in terms of their unique *** instance,Ligularia dictyoneura in ND and Potentilla delavayi in MD and SD.

关键词： anthropogenic disturbance functional diversity functional redundancy functionally unique species subalpine meadow

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Père David’s Deer(Elaphurus davidianus)in China:Population Dynamics and Challenges

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Journal of Resources and ecology 2022年第1期13卷 41-50页

作者： XUE Dayuan ZHANG Yuanyuan CHENG Zhibin ZHONG Zhenyu CAO Ming FU Mengdi BAI Jiade YUAN Xuejiao School of Life and Environmental Sciences Minzu University of ChinaBeijing 100081China Beijing Milu Ecological Research Center Beijing 100076China Beijing Biodiversity Conservation Research Center Beijing 100076China Institute of Environmental Governance and Big Data Application Environmental Development Center of the Ministry of Ecology and EnvironmentBeijing 100029China Key Laboratory of Regional Eco-Process and Function Assessment and State Environment Protection Chinese Research Academy of Environmental SciencesBeijing 100012China

The reintroduction of rare and endangered species is one of the most important approaches to conservation and ecosystem restoration,but it has still proven to be an adventurous undertaking and most reintroduction programmes fail,so successful demonstrations are needed.Père David’s deer(Elaphurus davidianus,Milu in Chinese)could be considered one of conservation’s great success stories,as this species’path on the road to extinction has been reversed by a combination of ex-situ conservation and successful re-introduction in *** species had been consigned to an imperial hunting ground when the last Chinese herds were exterminated during the fall of the Qing Dynasty(1644-1912).Fortunately,a few of the last remaining individuals were sent to European *** these animals,a herd was bred on the 14;Duke of Bedford’s estate,Woburn Abbey,and between 1985and 1987,and 38 Milu were donated back to China for re-introduction in Beijing Milu Park(BMP),the former imperial hunting *** additional 39 deer were released at Dafeng National Nature Reserve(DFNNR),Jiangsu Province in *** both of these safe and protected locations,the Milu thrived allowing for over 700 Milu to be sent to a further 82 sites throughout the species’original Chinese range over the last 36 *** a result,the Milu population totaled 9136 by 2021,with 2855 individuals now living back in the wild;while another 5681 individuals inhabit the DFNNR,and 186 reside in *** Milu,however,still face significant conservation *** population lacks genetic diversity,leading to severe inbreeding depression and carrying multiple risks,such as high miscarriage rates,a reduced lifespan,and susceptibility to *** constraints such as pollution and habitat fragmentation further result in small,fragmented wild ***,the species currently lacks a national level conservation master plan,the associated coordinated monitoring platforms,and breeding plans for China’s capti

关键词： Elaphurus davidianus Milu reintroduction ex-situ conservation population dynamics

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A study of the genus Xylotrechus Chevrolat(Coleoptera:Cerambycidae)from Beijing,China

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Entomotaxonomia 2021年第3期43卷 205-224页

作者： Meiying LIN Siqin GE Nengwen XIAO Engineering Research Center for Forest and Grassland Disaster Prevention and Reduction Mianyang Normal UniversityMianyangSichuan 621000China Key Laboratory of Zoological Systematics and Evolution Institute of ZoologyChinese Academy of SciencesBeijing 100101China State Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China

Ten species of the genus Xylotrechus Chevrolat,1860 from Beijing are *** pekingensis Pic,1939 is reinstated from synonym of Xylotrechus yanoi Gressitt,1934,and newly recorded from Hebei and Shaanxi *** bifenestratus Pic,1916 is proposed as a new junior synonym of Xylotrechus polyzonus(Fairmaire,1888),both were described from Beijing,*** species,***(Gebler,1825),*** Bates,1873,and ***(Pic,1936),are reported from Beijing for the first *** new localities are added to the related species based on specimens examined.A key to the ten species of Xylotrechus Chevrolat,1860 from Beijing is provided.

关键词： Cerambycinae Clytini taxonomy new synonym new record

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Plasticity Response Of Desert Shrubs To Extreme Drought Events At Different Phenophases Under the Context of Climate Change

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SSRN 2024年

作者： Wang, Chunyuan Yu, Minghan Ding, Guodong Quan, Zhanjun State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China State Key Laboratory of Environmental Protection for Regional Eco-Process and Function Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China Institute of Ecology Chinese Research Academy of Environmental Sciences Beijing100012 China Yanchi Research Station School of Soil and Water Conservation Beijing Forestry University Beijing100083 China Key Laboratory of State Forestry Administration on Soil and Water Conservation Beijing Forestry University Beijing100083 China

Desert ecosystems are expected to suffer from extreme drought events with unprecedented frequency and magnitude amidst the current situation of severe droughts and erratic seasonal rainfall induced by global climate change. Against this background, it is essential to elucidate the differences in the plasticity response of typical desert vegetation to extreme drought events at different phenophases for predicting the response of desert ecosystems to climate change. Taking the typical subshrub Artemisia ordosica community in the Mu Us Desert as the research object, this study simulated the extreme drought events via controlling rainfall at the sample plot scale, setting up three extreme drought treatment gradients in phenophases. This paper aimed to investigate the differences in the impacts of extreme drought events at different phenophases on the phenotypic characteristics and functional traits of A. ordosica, as well as the trade-off response mechanism of its twig number and length, and nutrient reproduction allocation to extreme drought events. Results showed that (1) Phenotypic characteristics of A. ordosica decreased significantly under extreme drought events at each phenophase, while the number and length of twigs declined, thereby lowering the accumulation of ANPP;the impacts of the extreme drought events on ANPP accumulation of A. ordosica at each phenophase were as follows: flowering and fruiting stage > sprouting stage > vegetative growth stage. (2) The number and length of twigs of the current year showed a significant positive correlation under extreme drought conditions. (3) A. ordosica would adapt to extreme drought via increasing the proportion of reproductive growth and decreasing the proportion of vegetative growth during both sprouting and vegetative growth stages. This study has demonstrated the varying impacts on phenotypic characteristics and functional traits of A. ordosica by extreme drought at each phenophase, and A. ordosica possesses a plast

关键词： Drought

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