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Bosten Lake, which locates in arid and desert zone, is the largest lake in Xinjiang, and is the largest inland freshwater lake in China. It has giant value in environment, ecology and economy. The water level of Bosten Lake has taken place tremendously in the recent 50 years, the water level descended from 1048m above sea level in 1958 to that of 1045m in 1987, and ascended from 1045m to 1048.9m during...
The contents and characteristics of ten heavy metals in surface sediments from Yangzonghai Lake in Yunnan, China were analyzed. Ecological risk index presented by Håkanson to assess the potential ecological risk of Yangzonghai Lake was utilized. The results showed that the average concentrations of titanium(Ti), manganese(Mn), zinc(Zn), vanadium(V), chromium(Cr), copper(Cu), nickel(Ni), cobalt(Co),...
In this paper, the measured date of air environment quality, water environment quality, acoustic environment quality and solid wastes in the Kanas National Natural Heritage Site of China during different periods were compared, the main factors resulting in the tourist environment pollution were evaluated, and corresponding ecological design approach for controlling tourist environment pollution was...
Based on methods of lanscape ecology and TM images of the Ebinur lake during the diffierent period, This paper studies the characteristics of landscape pattern, function and its variation. The ecological process, mechanism and intensity of variation influenced by the human activities and physical factors are analyzed in order to offer the countermeasure and references for restoring and reconstructing...
This paper use ETM and GIS date of 2000 year, using ecosystem service evaluation parameter which Costanza advanced, estimate that the ecosystem service function value of wet land and meadowland in Xinjiang ABI lakeside is 8.76×108 RMB/hm2. The contribution rate in the total meadow ecosystem service function value of Sacsaoul desert, tamarix cone, salt marsh, salt meadow are 26.03%, 21.36%, 20.93%,...
As the largest in-land fresh water lake of China, Poyang Lake is also an important wetland in the world. However, the lake area, like the other lake areas of China, has being faced series of ecological and environmental problems and challenges, such as soil erosion, land desertification, drought and flooding disasters, farmland being soiled, pollution, invasive species, loss of biodiversity, and more...
Spatial heterogeneity is the fundamental attribute of landscape and the reason for landscape elements generating matter flow and energy flow. On the basis of the distribution of aquatic vegetation landscape in Honghu Lake, we have carried out exploratory applied research on the method of landscape anisotropy. We determine the directions of anisotropy at a center-emanative and radioactive angle, and...
Urban wetlands play a significant role in the sustainable development. But the effect of human action on urban wetlands has been expanded in greater scope and depth, which may cause the accelerated degeneration of urban wetlands seriously. Based on the historical data of land using maps, topographic maps and TM images of Wuhan from 1930s to 2005, which were through the Man-Machine Interaction in ArcGIS...
Taking Futouhu which is the forth largest lake in Hubei Province as the study object, based on RS and GIS technologies, using the Landsat TM remote sensing images in 1991 and in 2005 as well as local chronicles as basic data resources, combined with field surveys and GPS positioning, the data on the dynamic changes of the area and the types of Futouhu wetland from 1991 to 2005 were obtained, and then...
The Qinghai-Tibet Plateau is the largest lake area in China, with a total area of existing lakes of 36,900 km2, accounting for 52% of the total lake area of China. Lakes on the Tibetan Plateau play critical roles in the water cycle and ecological and environment systems of the Plateau. The obvious changes of lake area in Qinghai-Tibet Plateau can be directly expressed by the remote sensing images...
Natural wetlands are the largest land-based natural sources for methane (CH4) emissions. China's natural wetland area accounts for about 4% of the area of the natural wetlands worldwide. Based on the data of global lakes and wetlands, in this study we conducted modeling work of CH4 emissions from natural wetlands in China by using terrestrial ecosystem model (TEM) of the 1995-2005. The results show...
In systems with strong seasonal difference in vegetation structure and appearance, multi-temporal imagery can be particularly useful for community- and species-level discrimination. And, since the availability of past data for one source of time series images may be limited, so we need to develop multi-temporal and multi-source method for wetland ecosystem monitoring. To perform this type of analysis,...
Based on the data of multi-temporal point TM images, by applying the theory of Ecosystem Service Value, the Gravity Center Model, ESDA method and so on, the paper calculates the ecosystem service value in Circum-Taihu Lake region in 1985, 1995, 2000, 2005 and analyzes the characteristics of the gain and loss of the ecosystem service value, their spatial difference changes, the spatial pattern evolution...
Beidagang wetland is an important infrastructure of Tianjin, possessing a variety of ecological environment and social service functions. However, Beidagang wetland ecosystem has been seriously degraded and its wetland functions have also been weakened under the influence of various factors. Research on the dynamic change characteristics of Beidagang wetland is of great significance to ameliorate...
The increasing different stress caused by human activities induced changes in Tianjin Binhai New Area intertidal wetlands recent years. To find out whether the ecosystem health status of the wetlands in this area has been changed correspondingly, data of macrobentho abundance and biomass of 20 stations, both in May and August 2007 were applied, and multiple ecological indicators of different levels...
In this work, the pollution characters of phosphorus in the two lakes are discussed. The average concentrations of TDP, DRP and DOP in the Wuliangsuhai Lake were higher than those of the Daihai Lake. The DOP concentrations account for not less than 60% of the total dissolved phosphorus (TDP) and the DOP pools in the overlying water of the two lakes are of 12t and 10t respectively. The contents of...
The distribution of picoplankton (Synechococcus, Prochlorococcus, Picoeukaryotes and heterotrophic bacteria) and their relationships with environmental factors have been investigated in Bailianjing River near Huangpu River in Shanghai, China. The average abundance of Synechococcus, Prochlorococcus, picoeukaryotes and heterotrophic bacteria were 103, 103, 104 and 106 cells mL-1, respectively. The abundance...
In this paper, the aesthetic mechanism is researched based on the needs of conserving the tourist aesthetic value of natural heritages and the election criteria in the Article VII of the World Heritages from three aspects, i.e. the tourist aesthetic subjects, aesthetic objects and aesthetic spatiotemporal scales. A case study on the structural characteristics of aesthetic subjects and their aesthetic...
The wetland ecosystem is a special natural complex formed by reciprocity between land and water. In recent years, there have many studies about wetland ecosystem in China. The aim of this paper is to summarize the ldquohot research topicsrdquo in the wetland ecosystem researches of China, which include value evaluation of wetland ecosystem services; circulation of materials; evaluation of wetland...
Pond is an ideal study target which can be regarded as an enclosed ecosystem with little external disturbance such as pollution discharge. The aim of the study is to obtain further understandings of freshwater eutrophication mechanism through a one-year's intensive observation and monitoring program for a shallow pond in Chongming Island, China. The result showed that NO3-N, PO4-P and DTP kept in...
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