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Quantitative Evaluation on Wetland Ecosystem Service Function in Chao Lake
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作者 唐晓先 高芮 《Agricultural Science & Technology》 CAS 2016年第11期2489-2492,2504,共5页
[Objective] The aim was to better reveal the type of ecosystem service function of wetlands in Chao Lake and provide references for protection and man- agement, restoration and rebuilding of local wetland ecosystem. [... [Objective] The aim was to better reveal the type of ecosystem service function of wetlands in Chao Lake and provide references for protection and man- agement, restoration and rebuilding of local wetland ecosystem. [Method] The val- ues of ecosystem function was estimated by market value method, opportunity cost approach, replacement cost method, shadow engineering approach, travel cost method, hedonic pricing method and contingent value method. [Result] With wetland ecosystem service function value totals 4.968 billion yuan, the value of eco-environ- ment regulation and maintenance was the highest, followed by the value of cultural and social function. The value of material production was the least. The values of sub-functions can be concluded by comparison of service function va}ue and pro- portions, as follows: flood mitigation 〉water purification 〉water conservation 〉 tourism&leisure〉material production〉scientific research and education〉water supply〉 biodiversity maintenance〉regulation on atmosphere constituents. [Conclusion] The re- search performed quantitative evaluations on ecosystem service function values of wetlands in Chao Lake and is of significance for specific development and protec- tion of local wetlands. 展开更多
关键词 Chao Lake wetland ecosystem service function Quantitative evaluation
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Sulfur cycle in the typical meadow Calamagrostis angustifolia wetland ecosystem in the Sanjiang Plain,Northeast China 被引量:9
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作者 LIU Jingshuang LI Xinhua 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2008年第4期470-475,共6页
The sulfur cycle and its compartmental distribution within an atmosphere-plant-soil system was studied using a compartment model in the typical meadow Calamagrostis angustifolia wetland in the Sanjiang Plain Northeast... The sulfur cycle and its compartmental distribution within an atmosphere-plant-soil system was studied using a compartment model in the typical meadow Calamagrostis angustifolia wetland in the Sanjiang Plain Northeast China. The results showed that in the typical meadow C. angustifolia wetland ecosystem, soil was the main storage compartment and current hinge of sulfur in which 98.4% sulfur was accumulated, while only 1.6% sulfur was accumulated in the plant compartment. In the plant subsystem, roots and litters were the main storage compartment of sulfur and they remained 83.5% of the total plant sulfur. The calculations of sulfur turnover through the compartments of the typical meadow C. angustifolia wetland ecosystem demonstrated that the above-ground component took up 0.99 gS/m^2 from the root, of which 0.16 gS/m^2 was translocated to the roots and 0.83 gS/m^2 to the litter. The roots took in 1.05 gS/m^2 from the soil, subsequent translocation back to the soil accounted for 1.31 gS/m^2, while there was 1.84 gS/m^2 in the litter and the net transfer of sulfur to the soil was more than 0.44 gS/(m^2·a). The emission of H2S from the typical meadow C. angustifolia wetland ecosystem to the atmosphere was 1.83 mgS/(m^2·a), while carbonyl sulfide (COS) was absorbed by the typical meadow C. angustifolia wetland ecosystem from the atmosphere at the rate of 1.76 mgS/(m^2·a). The input of sulfur by the rainfall to the ecosystem was 4.85 mgS/m^2 during the growing season. The difference between input and output was 4.78 mgS/m^2, which indicated that sulfur was accumulated in the ecosystem and may cause wetland acidify in the future. 展开更多
关键词 the Sanjiang Plain typical meadow Calamagrostis angustifolia wetland ecosystem sulfur cycle
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Changes of Coastal Wetland Ecosystems in the Yellow River Delta and Protection Countermeasures to Them 被引量:2
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作者 Guangzhou CUI Xuliang ZHANG +1 位作者 Zhaohui ZHANG Zongjun XU 《Asian Agricultural Research》 2013年第1期48-50,共3页
Coastal wetlands in the Yellow River Delta are typical new wetland ecosystems in warm temperate zone. In recent years, influenced by natural and human factors, these coastal wetlands in the Yellow River Delta have und... Coastal wetlands in the Yellow River Delta are typical new wetland ecosystems in warm temperate zone. In recent years, influenced by natural and human factors, these coastal wetlands in the Yellow River Delta have undergone changes of landscape fragmentation, vegetation degradation, pollution, species reduction, and harmful exotic species invasion. These changes have influenced sustainable and healthy development of marine economy of the Yellow River Delta. To protect natural ecological environment of the Yellow River Delta, the authors recommended that it should establish and improve policies, laws and regulations of wetland protection; carry out wetland resource investigation and assessment and monitoring; strengthen comprehensive protection and control of wetland; reduce wetland degradation and promote sustainable use of wetland. 展开更多
关键词 The YELLOW River Delta COASTAL wetland ecosystem C
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Construction and Protection of Qionghai Lake Wetland Ecosystems 被引量:1
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作者 Kaiwei CHEN 《Asian Agricultural Research》 2013年第4期76-78,82,共4页
Wetland is closely related to survival, reproduction and development of human beings. Due to population growth, industrialization, urbanization and agricultural modernization, wetland ecosystems are suffered from huge... Wetland is closely related to survival, reproduction and development of human beings. Due to population growth, industrialization, urbanization and agricultural modernization, wetland ecosystems are suffered from huge pressure of human society and the wetland ecological environment becomes extremely vulnerable. On the basis of analyzing current situations of Qionghai Lake wetland in Xichang City of Sichuan Province, this paper discussed the significance of Qionghai wetland construction and protection, and offered countermeasures and recommendations for solving existing problems in Qionghai wetland. 展开更多
关键词 wetland ecosystem CONSTRUCTION PROTECTION Qionghai
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Influences of 500 kV Transmission Lines on Wetland Ecosystem and Its Protective Countermeasures--A Case Study of the Lake Wetland Natural Reserve along the Yangtze River in Anqing City
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作者 Xia Shangguang Zhao Yuan 《Meteorological and Environmental Research》 CAS 2016年第4期17-22,共6页
The impact of 500 kV transmission lines of Anqing power plant across the lake wetland reserve along the Yangtze River on the safety of the ecosystem was taken as the researched object.The power frequency electric fiel... The impact of 500 kV transmission lines of Anqing power plant across the lake wetland reserve along the Yangtze River on the safety of the ecosystem was taken as the researched object.The power frequency electric field intensity(PFEFI),power frequency magnetic field intensity(PFMFI),radio interference,construction noise,vegetation destruction and the influence on water quality were investigated and monitored,and the influences of PFEFI,PFMFI,radio interference and construction noise on wild animals,especially the habitats and migration of birds were mainly researched.The direct and indirect influences on the surrounding environment as well as plants and animals in sensitive areas were analyzed and predicted.The results firstly showed there existed a 182 400m^3 stereo-space(PFEFI>4kV/m)which made flying birds unsafe under the lowest height 11 mof the lines,which fills the gap in the research of this field.Finally,some operational protection countermeasures were put forward at the current technical level to achieve the win-win goal of economic development and natural protection. 展开更多
关键词 Ultra-high-voltage transmission line Electromagnetic pollution LAKE wetland ecosystem safety Protective measures China
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Spatiotemporal Evolution of Ecosystem Service Value in Caohai National Nature Reserve
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作者 Denghong HUANG Zhenzhen ZHANG Jintong REN 《Meteorological and Environmental Research》 2024年第2期14-21,共8页
Wetland ecosystems are important regulators of global climate change.Studying the spatiotemporal changes and driving mechanisms of their ecosystem service values(ESV)is beneficial for the sustainable development of we... Wetland ecosystems are important regulators of global climate change.Studying the spatiotemporal changes and driving mechanisms of their ecosystem service values(ESV)is beneficial for the sustainable development of wetlands.This paper uses the equivalent factor method,based on land use changes,to reveal the spatiotemporal evolution of the ecosystem service value in the Caohai National Nature Reserve(CNNR).The results show the following:①from 2000 to 2020,there was a significant decrease in the core zone s arable land area,with an increase in forest and water areas.Construction land mainly increased in the experimental area,and the grassland area showed a fluctuating change of first increasing and then decreasing;②in 2000,2010,and 2020,the ecosystem service value of the study area was 302 million,296 million,and 325 million yuan,respectively,showing a trend of fluctuating growth,with the value of wetland ecosystems playing a dominant role;③regulatory services are the main contributors to the ecosystem service value in the study area,with a contribution rate of 60%.Hydrological regulation is the ecosystem function with the highest value in wetland ecosystem services,contributing more than 35%to the ESV in all three periods;④in terms of spatial distribution,the core zone s ecosystem service value is dominant.Looking at the total ecosystem service value of the region,the core zone>the experimental area>the buffer zone.In terms of ESV per unit area,the core zone(89000 yuan/hm^(2))is significantly higher than the buffer zone(39100 yuan/hm^(2))and the experimental area(15800 yuan/hm^(2)).The study can provide a basis for research and spatial management of ecosystem services in wetland ecosystems and nature reserves. 展开更多
关键词 ecosystem service value(ESV) Equivalent factor method Land use change wetland ecosystem CNNR
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Evaluation of Human Impacts on Bartlett Pond Ecosystem, Laredo, Southern Texas, USA, through Empirical Modeling
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作者 Maya P. Bhatt Amede Rubio +6 位作者 Ganesh B. Malla Cristobal Lopez Virginia Morales Erick Vazquez Cano David Marquez Orlando Berumen Alvarez Alfred Addo-Mensah 《Journal of Environmental Protection》 2024年第4期497-526,共30页
The trace elements chemistry of Bartlett Pond, a small shallow wetland pond in Laredo, Southern Texas, was sampled to evaluate the dynamics of trace elements impacts on water quality and ecosystems ecology of the pond... The trace elements chemistry of Bartlett Pond, a small shallow wetland pond in Laredo, Southern Texas, was sampled to evaluate the dynamics of trace elements impacts on water quality and ecosystems ecology of the pond. Two types of fish (bass and tilapia) were also sampled to see the trace element accumulation in different parts of their body. The concentrations of trace elements in water samples were found in the following order: Fe &Gt;Sb > Pb > As &Gt;Co > Tl > Cr > Cd within Bartlett Pond. Overall, the water quality of the pond is unacceptable for drinking and any other purposes as trace element concentrations (e.g. As, Cd, Co, Cr, Pb, Fe, Sb and Tl) are exceedingly higher (several fold) than the WHO and US EPA guidelines. Predictive and correlation analysis shows that most trace elements exhibit a strong positive correlation among them indicating the same anthropogenic sources and biogeochemical processes regulate these trace elements within the pond. Distributions of the trace elements in water exhibit different shapes mostly as positively skewed distribution for As, Cd, Co, Cr, and Tl, symmetrical distribution for Fe and almost symmetrical distribution for Pb and Sb. Concentrations of As, Co and Tl accumulated much higher in different parts of the Bass than Tilapia fish. The concentrations of As, Tl, Co, and Sb appeared significantly higher in different parts of the body of both Bass and Tilapia than the maximum SRM certified values. Accumulation of these contaminants in fish tissues pose increased health risks to humans who consume these contaminated fish although fishing is prohibited. Anthropogenic activities in the region primarily degrade the whole pond ecosystem ecology of the Bartlett Pond and waters of this pond to be not recommended for any use. These findings may be useful for the scientific community and concerned authorities to improve understanding about these precious natural resources and conservation of the ecosystem ecology. 展开更多
关键词 Trace Elements Bartlett Pond Laredo Southern Texas wetlandS ecosystem Ecology
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Production and emission of phosphine gas from wetland ecosystems 被引量:5
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作者 Chao Han Xueyuan Gu +4 位作者 Jinju Geng Yuning Hong Rui Zhang Xiaorong Wang Shixiang Gao 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2010年第9期1309-1311,共3页
Phosphine is a part of an atmospheric link of phosphorus cycle on earth, which could be an important pathway for phosphorus transport in environment. Wetland ecosystems are important locations for global biogeochemica... Phosphine is a part of an atmospheric link of phosphorus cycle on earth, which could be an important pathway for phosphorus transport in environment. Wetland ecosystems are important locations for global biogeochemical phosphorus cycle. In this study, production and emission fluxes of free phosphine from four wetlands types in southern China were observed in different seasons. The results showed that the concentration of phosphine liberated from wetlands was at pg/m^3·ng/m^3 level. The emission concentrations of different wetlands followed the sequence: paddy field (51.83 ± 3.06) ng/m^3 〉/marsh (46.54 ± 20.55) ng/m^3 〉 lake (37.05 ± 22.74) ng/m^3 〉〉 coastal wetland (1.71 ± 0.73) ng/m^3, the positive phosphine emission flux occurred in rice paddy field (6.67 ± 5.18) ng/(m^2.hr) and marsh (6.23 ± 26.9) ng/(m^2.hr), while a negative phosphine flux of (-13.11 ± 35.04) ng/(m^2.hr) was observed on the water-air interface of Lake Taihu, suggesting that paddy field and marsh may be important sources for phosphine gas in atmosphere, while lake may be a sink of atmospheric phosphine gas during the sampling period. Atmospheric phosphine levels and emission flux from Yancheng marsh and rice paddy field varied in different seasons and vegetational zones. Both diffusion resistance in aqueous phase and temperature were dominating factors for the production and transportation of phosphine to atmosphere. 展开更多
关键词 PHOSPHINE FLUX wetland ecosystems
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Changing Process and Impact Factors of Ecosystem in Shuangtaizi Estuary Wetland of China 被引量:1
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作者 王永洁 郑冬梅 罗金明 《Journal of Landscape Research》 2011年第5期45-48,51,共5页
By introducing geological and natural conditions of Shuangtaizi Estuary Wetland,a national nature reserve,and borrowing Landsat5 TM wetland data of the year 1987 and 2005,the core area of Shuangtaizi Estuary Wetland i... By introducing geological and natural conditions of Shuangtaizi Estuary Wetland,a national nature reserve,and borrowing Landsat5 TM wetland data of the year 1987 and 2005,the core area of Shuangtaizi Estuary Wetland is studied,areas of its natural water,mudflat,seepweed beach,culture zone,reservoir and swag,reed field,rice field and non-wetland landscape are respectively analyzed,as well as the changes of wetland community,water quality,waterfowl quantity and species.It is found that the study area is suffering from serious fragmentation of wetland,reducing reed yield,degrading water quality,decreasing bird species and amount,which implies that the degraded wetland environment has imposed threats on the survival of some wetland species.Root causes of such a result are analyzed from the perspectives of regional climate changes and human interventions;while regional climate changes include obvious temperature increase and precipitation decrease,human interventions include oil exploration,reclamation of land from the lake,overuse of biotic resources,environment pollution.Due to the interactive influence of these two factors,ecosystem of Shuangtaizi Estuary Wetland has experienced drastic changes,which should be attached sufficient importance by relevant departments so as to enhance its protection and management. 展开更多
关键词 wetland ecosystem CHANGING process IMPACT FACTORS Shuangtaizi ESTUARY wetland
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EMERGY analysis for sustainability evaluation of the Baiyangdian wetland ecosystem in China 被引量:1
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作者 Weiqing MENG Cui HAO +1 位作者 Hongyuan LI Meiting JU 《Frontiers of Environmental Science & Engineering》 SCIE EI CSCD 2010年第2期203-212,共10页
t This study presents a quantitative and ecological benefit evaluation of the Baiyangdian wetland in China between the years 2000 and 2006.Methods of EMERGY analysis were applied to illustrate the wetland ecosystem,to... t This study presents a quantitative and ecological benefit evaluation of the Baiyangdian wetland in China between the years 2000 and 2006.Methods of EMERGY analysis were applied to illustrate the wetland ecosystem,to evaluate the economic and environmental inputs and consequent yields,and to assess the sustainability of the Baiyangdian wetland.The indicators for the integrated ecological and economic system,such as EMERGY yield ratio(EYR)(7.51),EMERGY investment ratio(EIR)(4.52),environmental loading ratio(ELR)(2.92),EMERGY exchange ratio(0.41),and EMERGY sustainable indicator(ESI)(2.57)were calculated,compared,analyzed,and discussed.The non-renewable investment in Baiyangdian was greater than renewable investment,leading to the unsustainable development of the system.High EYR indicated that the Baiyangdian integrated system had created huge profits for its people,while ELR and ESI revealed that human behavior has been a heavy burden on the environment,and countermeasures should be taken by the Chinese government to relieve and resolve these problems.Potential management methods were also proposed in this paper. 展开更多
关键词 EMERGY analysis SUSTAINABILITY wetland ecosystem INDICATORS
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Balanced nitrogen economy as a flexible strategy on yield stabilizing and quality of aquatic food crops in wetland ecosystem
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作者 A.M.Puste P.K.Sarkar D.K.Das 《Science China(Life Sciences)》 SCIE CAS 2005年第z2期980-987,共8页
In wetland ecosystem, nitrogen along with other elements and its management is most imperative for the production of so many aquatic food, non-food and beneficial medicinal plants and for the improvement of soil and w... In wetland ecosystem, nitrogen along with other elements and its management is most imperative for the production of so many aquatic food, non-food and beneficial medicinal plants and for the improvement of soil and water characteristics. With great significant importance of INM (integrated nutrient management) as sources, emphasizing on management on nitrogen as a key element and its divergence, a case study was undertaken on such aquatic food crops (starch and protein-rich, most popular and remunerative) in the farmers' field of low-lying 'Tal' situation of New Alluvial Zone of Indian subtropics. The study was designed in factorial randomized block design, where, three important aquatic food crops (water chestnut (Trapa bispinosa Roxb.), makhana (Euryale ferox Salisb.) and water lily (Nymphaea spp.) as major factor and eleven combinations of organic and inorganic sources of nutrients as sub-factor was considered in the experiment. It revealed from the results that the production of fresh kernels or nuts of water chestnut (8.571 ha-1), matured nut yield of makhana (3.06 t ha-1) and flower stalks of water-lily as vegetables (6.38 t ha-1) including its nutritional quality (starch, protein, sugar and minerals) was remarkably influenced with the application of both organic (neem oilcake @ 0.2 t ha-1) and inorganic sources (NPK @ 30:20:20 kg ha-1 along with spraying of NPK @ 0.5% each over crop canopy at 20 days interval after transplanting) than the other INM combinations applied to the crops. Among the crops, highest WCYE (water chestnut yield equivalence) exhibited in makhana due to its high price of popped-form in the country, which is being exported to other countries at now. Sole application of both (organic and inorganic sources) with lower range did not produce any significant outcome from the study and exhibited lower value for all the crops. Besides production of food crops, INM also greatly influenced the soil and water characterization and it was favourably reflected in this study. The physico-chemical characteristics of soil (textural class, pH, organic carbon, organic matter, ammoniacal nitrogen, nitrate nitrogen, available nitrogen, phosphorus and potassium) are most important and contributed a significant improvement due to cultivation of these aquatic crops. Analysis of such wet bodies represented the water characteristics (pH, BOD, COD, CO3 =, HCO3-, NO3- N, SO4-S and Cl-) were most responsive, adaptable and quite favourable for the cultivation of these crops in this vast waste unused wetlands for the mankind without any environmental degradation. 展开更多
关键词 aquatic food crops INM NITROGEN soil & water characterization ECONOMICS wetland ecosystem.
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Ecosystem Health and Comprehensive Ecological Benefit Assessment of an Artificial Wetland in Western Jilin Province 被引量:5
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作者 CHEN Ming-hui ZHANG Chen +1 位作者 HU Yan DONG De-ming 《Meteorological and Environmental Research》 CAS 2011年第9期73-76,共4页
[Objective] This research aimed to assess the state of ecosystem health and comprehensive ecological benefit of an artificial wetland in western Jilin Province. [Method] To investigate the effects of reclaimed water f... [Objective] This research aimed to assess the state of ecosystem health and comprehensive ecological benefit of an artificial wetland in western Jilin Province. [Method] To investigate the effects of reclaimed water from Yingtai Oil Production Plant on the wetland ecosystem, a comprehensive ecological assessment index of an artificial wetland in the west of Jilin Province was established to measure the ecological economic and social benefits. The quantitative evaluation on the ecosystem health and comprehensive ecological benefit of the artificial wetland were carried out from 2003 to 2010 and were measured by means of the square difference method. [Result] After eight years of irrigation by reclaimed water, the levels of ecosystem health and benefit of the artificial wetland improved from Grade IV to Grade II, and the ecological environment, economic and social development of the wetland tended to improve. [Conclusion] The results indicated that the use of reclaimed water for irrigation of wetland ecosystems was a suitable way to control drought in arid and semi-arid regions. 展开更多
关键词 Artificial wetland ecosystem health Index system Comprehensive ecological benefit Reclaimed water China
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Spatiotemporal Characteristics of Wetlands Ecosystem in the Niger Delta Region 被引量:1
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作者 Wali Elekwachi Philip O. Phil-Eze +2 位作者 Etiese A. Etuk Collins H. Wizor Chinedu J. Onyishi 《Journal of Geoscience and Environment Protection》 2021年第12期244-264,共21页
Wetlands are classified as essential and valuable components of the ecosystem. Wetlands are significant for ecosystem services such as nutrient cycles, soil formation and water treatment. Nearly half of the world’s w... Wetlands are classified as essential and valuable components of the ecosystem. Wetlands are significant for ecosystem services such as nutrient cycles, soil formation and water treatment. Nearly half of the world’s wetlands have vanished in the last century because of anthropogenic activities, agricultural land use, and urban development, one of such places that are faced with the challenges of sustainability is the wetland habitats. This study aimed at assessing the spatial temporal characteristics of wetlands ecosystem in the Niger Delta Region of Nigeria from 1986-2016. The secondary data include raw satellite imageries obtained from the archive of the United States Geological Survey and Earth Explorer. The data set includes a notable period of four years landsat images for, 1986, 1996, 2006 and 2016. The maps were projected using Universal Transverse Mercator (UTM) projection system and datum WGS 84 of zone 32. Satellite images of the study area were acquired from the United States Geological Survey (USGS). The USGS uses the LandSat5 Thematic Mapper (TM) Landsat7 Thematic Mapper, Enhanced Thematic Mapper (ETM+), Thermal Infrared Sensor (TIRS) and Landsa8 Operational Land Imager (OLI) to generate high resolution images that are useful for this type of study. The satellite imageries were also analyzed using GIS and Remote Sensing techniques by computing of Normalized Differential Vegetation Index (NDVI) values for the entire study area by conversion of spectral reflectance values into NDVI values.<span> The satellite images covering the area were acquired and analyzed using ArcGIS10.6. A total area of 25</span></span><span style="font-family:"">,</span><span style="font-family:"">053.93</span><span style="font-family:""> (km<sup>2</sup>)<span> was delineated in the study area. After processing the imagery, five land use/land cover (LULC) classes were developed in ArcGIS environment, such as </span>Built-up area, Fallow land, Vegetation, Wetland and Waterbody.</span><span style="font-family:""> </span><span style="font-family:"">This study concludes that changes in wetland landscape patterns will produce profound impacts in urban areas where there<span style="color:red;"> </span>are rapid anthropogenic activities. Anova table showed a huge significant relationship between time and vegetation decrease across the study area at 0.027 which is less than 0.05 significance level. Wetlands warming and drying will cause the shrinking and reduction of wetland in sizes from accelerated wetland degradation. Therefore, there is an interaction and mutual influence between dynamic changes of wetland landscape patterns and other land use classes. 展开更多
关键词 wetland ecosystem Land Cover Multiple Linear Regression Analysis GIS Remote Sensing
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CRITICAL EXAMINATION OF WETLANDS ECOSYSTEM SERVICE IN SHANGHAI, CHINA 被引量:3
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作者 Zhao Bin Yang Feng-Hui Gao Yu Ma Zhi-Jun Li Bo Chen Jia-Kuan 《湿地科学》 CSCD 2005年第4期279-285,共7页
Wetlands provide many important services to human society, but are at the same time ecologically sensitive and adaptive systems, and are under heavy pressure. As a wetland city, Shanghai city has various types of natu... Wetlands provide many important services to human society, but are at the same time ecologically sensitive and adaptive systems, and are under heavy pressure. As a wetland city, Shanghai city has various types of natural wetlands (chiefly, includes coastal, riverine, lacustrine, and reservoir and pond wetlands), which account for 23.5% of total areas. Meanwhile, Shanghai is a metropolitan city, being confronted with the pressure of port expansion and urban and industrial sprawl, just like the other megalopolises in the world. Based on our earlier study on estimating the ecological service values of wetlands in Shanghai, this paper analyzed the ecological functions of the wetland city, such as nutrient cycling, water regulation and supply, food supply, disturbance control, water treatment, habitats and refugia, aesthetic, education and culture, tidal flats and potential land resources. Unfortunately, the wetland function was being degraded and the ecosystem service was discounted accordingly because of over-reclamation, over-fishing, water pollution, and rapid urbanization in the city. It’s therefore recommended that, to improve the environment of Shanghai ciry, and make the ecosystems sustainable function appropriately, the effective wetland management strategies should be taken. 展开更多
关键词 生态系统 生态功能 湿地 上海
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Distribution of Cd and Pb in a wetland ecosystem
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作者 何文珊 陆健健 《Science China Chemistry》 SCIE EI CAS 2001年第S1期178-184,共7页
Cadmium and lead contents in sediments, dominant species of plants (Phargmites aus-tralis and Scripus mariqutei), benthos (Helice tridens tientsinensis, llyoplax deschampsi, and Bul-lacta exarata), and waders (Calidri... Cadmium and lead contents in sediments, dominant species of plants (Phargmites aus-tralis and Scripus mariqutei), benthos (Helice tridens tientsinensis, llyoplax deschampsi, and Bul-lacta exarata), and waders (Calidris ruficollis) on the Eastern End of Chongming Island were measured. The results showed that, for cadmium, there are clear stratification in the sediment of reclaimed area and bio-amplification in food chain. However, for lead, a phenomenon was different. The amplification factors (AFs) for cadmium of primary producers, primary consumers, and secondary consumers were 2.59-12.38, 0.09-8.44, and 51.1, respectively. For lead, AFs of primary producers, primary consumers and the top trophic layer were 0.29-2.62, 0.06-5.62, and 7.31, respectively. Each species of macrobenthos showed different strategies to cadmium and lead. Large-sized crabs accumulated more lead, while small-sized crabs and snails accumulated more cadmium. Waders had significantly highest AFs for cadmium and lead in the study. That is to say, bio-amplification of the food chain took place for cadmium and lead on the tidal flat with different AFs, and showed that different species have different strategies to a varies of heavy metal elements. 展开更多
关键词 CADMIUM LEAD wetland ecosystem reclamation.
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Restoration of Damaged Ecosystem Services on Wetlands in Northern Part of the Volga-Akhtuba Floodplain (Russia)
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作者 A. V. Lukonina G. Y. Klinkova N. B. Lopantzeva 《Journal of Geoscience and Environment Protection》 2015年第6期6-10,共5页
Due to the regulation of the river Volga flow, expanding of the territories intended for construction and development of agriculture wetlands Volga-Akhtuba floodplain are being significantly transformed and are losing... Due to the regulation of the river Volga flow, expanding of the territories intended for construction and development of agriculture wetlands Volga-Akhtuba floodplain are being significantly transformed and are losing many of their qualities. Non-regulated loads lead to the break of natural physical and chemical characteristics of water bodies, loss of biodiversity, degradation of structure and functions of biological communities and, as a result, to decreasing of potential ecosystem services. Restoration of the lost qualities of water ecosystems is a key factor in increasing sustainability of reclaimed landscapes and creating comfortable conditions for living of locals and their economic activity. On the territory of the biosphere reserve “Nature park” “Volga-Akhtuba floodplain” a number of model sites were defined in order for research projects and practical work on restoration of degraded landscapes to be executed. The widest range of the lost ecosystem qualities is being restored during work on Lake Zapornoye. Restoration of ecosystem functions is being implemented according to the main economic activities carried out in this area. Ecosystem services of the area are specified in accordance with its functional purpose. The existing landscape and ecology conditions have been studied and estimated to see if the planned ecosystem services can be provided. The project suggests the following activities: restoration of hydro-morphological characteristics, reconstruction of habitats for biodiversity and their ecosystem services, improvement to restore and preserve recreational qualities of landscape. The project includes the monitoring the effectiveness of restoration. Monitoring program is based on indices of environmental assessment. 展开更多
关键词 RESTORATION of wetlandS ecosystem Services the Volga-Akhtuba FLOODPLAIN
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Floral Diversity Status in Urban Coastal Wetland &Associated Coastal Ecosystems of Crow Island Mattakkuliya, Sri Lanka
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作者 Nisitha Yapa Kasunthi Amarasekara Shamali Rathnasri 《Open Journal of Ecology》 2022年第1期51-65,共15页
Colombo is the capital of Sri Lanka and the only wetland city in South Asia under the Ramsar Convention. Crow Island Beach Park and associated coastal area belong to the Colombo urban coastal wetland ecosystems. Crow ... Colombo is the capital of Sri Lanka and the only wetland city in South Asia under the Ramsar Convention. Crow Island Beach Park and associated coastal area belong to the Colombo urban coastal wetland ecosystems. Crow Island wetland contributes diverse habitats for numerous flora and fauna species. The present study was conducted to assess the status of floral diversity in the Crow Island Beach Park and associated coastal ecosystem during the months of August to October 2021. Study area is divided in to three sites (A, B, C). Line transects method and field observations were used in the study. This coastal wetland consists of mosaic of five major vegetation types: Herbaceous, tree, shrub, creeper, grass and other than that marine algae namely<em> Chaetomorpha antennina</em>, <em>Rhizoclonium africanum</em>, <em>Ulva compressa</em> belonging to chlorophyta (green algae) and <em>Grateloupia</em> <em>lithophila</em> belonging to rhodophyta (red algae) were found in the study area. A total number of 102 flora species belonging to 50 families were recorded from the study area. There were two true mangrove species and 16 mangrove associated species in the study sites. Out of the 102 plant species 46 were recognized and documented as plants with medicinal values. Shannon-Wiener diversity indexes for mangrove and mangrove associated species were recorded as 2.378, 2.304 and 1.676 in site A, B and C respectively. Simpson’s diversity index for mangrove and mangrove associated species was recorded as 0.889, 0.874 and 0.735 respectively in site A, B and C and Jaccard index of similarity between three study sites showed high values ranging from 41% to 69% for mangrove and mangrove associated species. 展开更多
关键词 Beach Park Coastal ecosystem Floral Diversity Seaweeds Urban wetland MANGROVE
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云南省沼泽湿地生态系统服务功能价值评价
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作者 吴富勤 朱定芬 +2 位作者 秦燕 刘茜 宋劲忻 《林业调查规划》 2024年第5期118-124,共7页
以2021年为基准年,将云南省沼泽湿地生态系统服务功能划分为供给服务、生态调节服务、支持服务和社会服务4类,估算各类服务价值。结果表明,云南省沼泽湿地生态系统年服务总价值量为303.29亿元,单位面积价值量为74.74万元/(hm^(2)·... 以2021年为基准年,将云南省沼泽湿地生态系统服务功能划分为供给服务、生态调节服务、支持服务和社会服务4类,估算各类服务价值。结果表明,云南省沼泽湿地生态系统年服务总价值量为303.29亿元,单位面积价值量为74.74万元/(hm^(2)·a);在4类服务功能中,生态调节服务价值(169.63亿元)>供给服务价值(115.51亿元)>社会服务价值(13.41亿元)>支持服务价值(4.74亿元);各州市沼泽湿地供给生态服务价值最高为迪庆州(155.70亿元)。该结果旨在为云南省沼泽湿地保护管理与生态保护补偿政策制定提供科学依据。 展开更多
关键词 沼泽湿地 生态系统服务功能 价值评估 云南省
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我国湿地土壤动物生态地理分布研究进展
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作者 申海香 蔡海 +3 位作者 马尚盛 龚建军 赵晓丽 马正学 《绿色科技》 2024年第4期63-68,共6页
土壤动物是湿地系统的重要成分,能改善土壤的性质、调节物质的分解、促进养分的循环、指示环境的变化等。目前,针对湿地土壤动物的生态地理分布、不同湿地土壤动物群落结构及物种多样性差异的研究较少,为进一步了解我国湿地土壤动物生... 土壤动物是湿地系统的重要成分,能改善土壤的性质、调节物质的分解、促进养分的循环、指示环境的变化等。目前,针对湿地土壤动物的生态地理分布、不同湿地土壤动物群落结构及物种多样性差异的研究较少,为进一步了解我国湿地土壤动物生态地理分布、群落结构及物种多样性差异,梳理了1979-2023年我国关于土壤动物生态地理分布和不同湿地土壤动物群落结构差异研究的相关文献。研究表明:目前对湿地土壤动物生态地理分布、生态特征和生态功能的研究具有明显的区域性。不同湿地土壤动物的优势类群不同,在土层中具有明显的表聚性,以腐食性动物为主,蜱螨类(A)和弹尾类(C)数量比具有典型的地带性,不同湿地土壤动物种类和数量具有典型的季节性变化,呈现出典型的湿地特征。建议在今后的研究中,将分子生物学技术应用到土壤动物分类和多样性研究中,深入研究土壤动物分布与地理环境的关系,筛选出不同湿地环境中的指示类群,加强土壤动物在湿地生态恢复中的应用性研究。 展开更多
关键词 湿地 土壤动物 生态地理分布 群落特征 研究进展
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湿地甲烷代谢对氮输入响应的复杂性及其机制分析
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作者 仝川 罗敏 谭季 《生态学报》 CAS CSCD 北大核心 2024年第4期1324-1335,共12页
氮素是影响湿地甲烷代谢过程的重要因素之一。氮输入是否影响湿地甲烷排放,增加全球气候变暖的风险,一直受到科学界的高度关注。目前关于氮输入对湿地甲烷排放影响的几篇meta-analysis文章的主要结论均为氮输入促进湿地甲烷排放,但是多... 氮素是影响湿地甲烷代谢过程的重要因素之一。氮输入是否影响湿地甲烷排放,增加全球气候变暖的风险,一直受到科学界的高度关注。目前关于氮输入对湿地甲烷排放影响的几篇meta-analysis文章的主要结论均为氮输入促进湿地甲烷排放,但是多篇研究性论文的结果为氮输入抑制或不影响湿地甲烷排放,由此可见氮输入对湿地甲烷排放的影响十分复杂。湿地甲烷代谢包括湿地甲烷产生、氧化和传输过程以及最终的甲烷排放,综述不同形态氮输入对水稻田、内陆湿地和滨海湿地甲烷排放通量影响的复杂性;分析湿地甲烷产生速率和途径、甲烷好氧氧化和硝酸盐/亚硝酸盐型厌氧甲烷氧化对不同形态氮输入的响应及机制。硝态氮输入对湿地甲烷产生具有抑制作用已成共识,然而其它形态氮输入对湿地土壤甲烷产生的影响具有较大的不确定性,氮输入影响湿地甲烷产生的机制主要包括电子受体-底物竞争机制、离子毒性机制、促进植物生长-碳底物供给增加机制以及pH调控机制等。氮输入对湿地好氧甲烷氧化影响的研究多集中在水稻田和泥炭湿地,影响的结果包括促进、抑制或影响不显著;氮输入促进湿地土壤硝酸盐/亚硝酸盐型厌氧甲烷氧化。着重分析氮输入对湿地甲烷代谢影响不确定性的成因,指出湿地甲烷代谢对氮输入的响应是一个生态系统层面的生物地球化学过程,并提出氮输入是最具争议效应的驱动因素之一,其对甲烷代谢的影响很难得出明确的模式,可能需要考虑湿地土壤特征(本底氮含量、有机碳含量、土壤C:N值等)以及植物群落类型和特征,最后提出今后在氮输入对湿地甲烷代谢影响方面应加强的研究领域。 展开更多
关键词 氮输入 甲烷通量 甲烷产生和氧化 不确定性 生态系统特征 湿地
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