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Search Results: 1 - 10 of 98678 matches for " LIU Jing-shuang "
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Liu Jing-Shuang,

生态学报 , 1993,
Abstract: 本文利用生态学方法定量地研究了长白山高山苔原主要建群种植物——牛皮杜鹃群落的物质循环。研究结果表明:在植物与土壤之间的封闭循环中,植物年吸收的元素数量大于凋落物年分解释放的量,处于不平衡状态。而在开放循环中,整个群落的物质(除N.P外)循环处于基本平衡状态。在研究不同元素与植物之间的关系时还发现:植物的各部位对不同元素的累积能力具有明显的差异。如植物花、果中的Ca、Mg、N和P含量高,根中的Fe,Al含量高。在植物同一部位中,各元素的累积能力也不同,如Ca,Mg,Mn,P和N在叶肉中的含量高于在叶脉中的含量,而Fe,Al在叶脉中的含量却高于叶肉中的含量。这种差异性标志着不同的化学元素具有不同的植物生理功能。存在于叶肉中的化学元素要比存在于叶脉或纤维中的化学元素循环周期短,植物利用率高,这对保持生态系统内的物质平衡具有重要的作用。
Element cycling in the dominant plant community in the Alpine tundra zone of Changbai Mountains, China
LIU Jing-shuang,YU Jun-bao,
LIU Jing-shuang
,YU Jun-bao

环境科学学报(英文版) , 2005,
Abstract: Element cycling in the dominant plant communities including Rh. aureum, Rh. redowskianum and Vaccinium uliginosum in the Alpine tundra zone of Changbai Mountains in northeast China was studied. The results indicate that the amount of elements from litter decomposition was less than that of the plant uptake from soil, but that from plant uptake was higher than that in soil with mineralization process released. On the other hand, in the open system including precipitation input and soil leaching output, because of great number of elements from precipitation into the open system, the element cycling(except N, P) in the Alpine tundra ecosystem was in a dynamic balance. In this study, it was also found that different organ of plants had significant difference in accumulating elements. Ca, Mg, P and N were accumulated more obviously in leaves, while Fe was in roots. The degree of concentration of elements in different tissues of the same organ of the plants also was different, a higher concentration of Ca, Mg, P and N in mesophyll than in nerve but Fe was in a reversed order. The phenomenon indicates (1) a variety of biochemical functions of different elements, (2) the elements in mesophyll were with a shorter turnover period than those in nerve or fibre, but higher utilization rate for plant. Therefore, this study implies the significance of keeping element dynamic balance in the alpine tundra ecosystem of Changbai Mountains.
Nitrogen cycling of atmosphere-plant-soil system in the typical Calamagrostis angustifolia wetland in the Sanjiang Plain, Northeast China
SUN Zhi-gao,LIU Jing-shuang,
SUN Zhi-gao
,LIU Jing-shuang

环境科学学报(英文版) , 2007,
Abstract: The nitrogen (N) distribution and cycling of atmosphere-plant-soil system in the typical meadow Calamagrostis angustifolia wetland (TMCW) and marsh meadow Calamagrostis angustifolia wetland (MMCW) in the Sanjiang plain were studied by a compartment model. The results showed that the N wet deposition amount was 0.757 gN/(m2 x a), and total inorganic N (TIN) was the main body (0.640 gN/(m2 x a). The ammonia volatilization amounts of TMCW and MMCW soils in growing season were 0.635 and 0.687 gN/m2, and the denitrification gaseous lost amounts were 0.617 and 0.405 gN/m2, respectively. In plant subsystem, the N was mainly stored in root and litter. Soil organic N was the main N storage of the two plant-soil systems and the proportions of it were 93.98% and 92.16%, respectively. The calculation results of N turnovers among compartments of TMCW and MMCW showed that the uptake amounts of root were 23.02 and 28.18 gN/(m2 x a) and the values of aboveground were 11.31 and 6.08 gN/(m2 x a), the re-translocation amounts from aboveground to root were 5.96 and 2.70 gN/(m2 x a), the translocation amounts from aboveground living body to litter were 5.35 and 3.38 gN/(m2 x a), the translocation amounts from litter to soil were larger than 1.55 and 3.01 gN/(m2 x a), the translocation amounts from root to soil were 14.90 and 13.17 gN/(m2 x a), and the soil (0-15 cm) N net mineralization amounts were 1.94 and 0.55 gN/(m2 x a), respectively. The study of N balance indicated that the two plant-soil systems might be situated in the status of lacking N, and the status might induce the degradation of C. angustifolia wetland.
Development in study of wetland litter decomposition and its responses to global change

SUN Zhi-Gao,LIU Jing-Shuang,

生态学报 , 2007,
Abstract: Material cycle and energy flow is one of the important contents of ecosystem research. Litter decomposition is the important link of nutrition cyclic process, and connects the synthesis (photosynthesis) and decomposition (the decomposition of organic matter and the release of nutrient elements) of biological organism. Wetlands are the most active interfaces for energy and material movement on the earth since they are the ecotones between waters and lands. The decomposition rates of litters in wetland ecosystem, to a great extent, affect the accumulation rates of litters and the return of nitrogen (N), phosphor (P) and other elements to soil pool. This process even affects the germination, growth, species abundance and aboveground biomass of wetland plant, and further influences the construction of plant community and the competition among populations in habitat. In this paper, we aim to provide a critical review on the recent development in study of wetland litter decomposition. The study of wetland litter decomposition is constantly deepened along with the improvement of study methods. Models have been become important study means, so the researches about them are also constantly deepened. The current studies mainly focus on two aspects, that is, the change characteristics of organic matter components and element contents. Litter decomposition is mainly controlled by both biotic factors (such as the physical and chemical properties of litter and the species, abundance and activity of heterotrophic microbe and soil fauna) and abiotic factors (such as climate, soil moisture, acidity, alkalinity, salinity and wetland sediment etc). With respect to the biotic factors, the chemical properties of litter (mainly include the contents of nitrogen, phosphor, lignin and cellulose, the ratios of C/N, lignin/N and C/P) are the control factors of decomposition. Among them, the ratios of C/N and lignin/N are the best predication indexes of decomposition rates as they reflect the ratio of carbohydrate and lignin to protein in litter. However, the predication indexes of decomposition in different stages are different as the changes of litter substrate quality. The activities of microbe and soil fauna are more important to the decomposition of recalcitrant component in litter at later stage. With respect to the abiotic factors, temperature rising can increase the decomposition rates, and precipitation affects the activity of decomposer and the leaching of chemical substances in litter. Water condition affects the ventilative status of litters, and wetland nutrient status affects litter substrate quality, hence indirectly influences decomposition rates. Temperature, precipitation and other abiotic factors also indirectly influence decomposition through their effects on biotic factors. http://www.ecologica.cnUnderstanding the responses of litter decomposition to global warming, CO2 doubling, the changes of dry or wet deposition and its chemical components are of cr
Soil nitrogen net mineralization and nitrification in typical Calamagrostis angustifolia wetlands in Sanjiang Plain

SUN Zhi-gao,LIU Jing-shuang,

应用生态学报 , 2007,
Abstract: From June 2004 to July 2005, the dynamics of soil inorganic N pool and N net mineralization/nitrification rates in typical meadow Calamagrostis angustifolia wetland (TMCW) and marsh meadow C. angustifolia wetland (MMCW) in Sanjiang Plain were studied by top-closed PVC tube in situ incubation method, with the affecting factors and annual N net mineralization/nitrification investigated. The results showed that the soil inorganic N in the two wetlands had evident dynamic characteristics. The NH4 -N and NO3-N contents were much higher in TMCW soil than in MMCW soil, and the soil N net mineralization/nitrification rates in the two wetlands presented significant fluctuations. Biological immobilization, denitrification, and abundant precipitation in rainy season were the main reasons inducing the N net mineralization/nitrification rates to be negative, and temperature, precipitation, soil organic matter content, soil C/N ratio and soil pH were the main factors resulting in the significant differences of soil inorganic N pool and N net mineralization/nitrification rates between the two wetlands. The annual N net mineralization and nitrification and the percentage of nitrified N in mineralized N were much higher in TMCW soil than in MMCW soil, suggesting that TMCW soil was superior to MMCW soil in N availability and available N-maintaining capacity.
Dynamic Analysis and Forecast of Ecological Footprints in Jilin Province

GU Kang-Kang,LIU Jing-Shuang,

中国科学院研究生院学报 , 2007,
Abstract: Ecological footprints model is a method of measuring the sustainable development. The model was applied to evaluate the present situation of sustainable development of Jilin province and its developing trend in future, which can provide suggestions for the sustainable development of Jilin province. We reviewed the past and present study of the model and the way of its calculation. Ecological footprints (EF) and ecological capacity (EC) in Jilin province from 1978 to 2002 were studied by the ecological footprints model and ecological footprints and ecological capacity of Jilin province from 2004 to 2016 was predicted by the regression model. Results showed: from 1978 to 2002, in Jilin province, the per capital EF increased from 1.090hm2 to 2.457hm2, and the increase speed per year was 3.45%; the per capital EC decreased from 1.210hm2 to 1.096hm2, and the decrease speed per year was 0.4%. There was ecological surplus in 1978 and 1980, while in the other years there ecological deficit. From 2004 to 2016, the increase speed per year of per capital EF will reach 1.99%, and the decrease speed per year of per capital EC will reach 0.5%. The extant problems of ecological footprints model and further study were also discussed.
Water Environmental Health Risk Assessment of the Second Songhua River

SU Wei,LIU Jing-shuang,WANG Yang,

自然资源学报 , 2007,
Abstract: This paper assesses the environmental health risk through drinking water based on the model for water environmental health risk analysis and the monitoring data from 1995 to 2004.The results show that the greatest health risks for individual person per year is caused by Cr(VI);the health risk of carcinogens is much higher than the health risk of non-carcinogens;the health risk in the sections which is higher than the standard value recommended by ICRP has decreased from 1995 to 2004,but the health risk in six sections is still higher than the standard value in 2004 which caused by the high concentrations of Cr(VI)and As.So the effective way of decreasing the health risk is to control and dispose the wastewater containing Cr(VI)and As discharging into the Second Songhua River.
The Biogeochemical cycle of sulfur in Calamagrostis angustifolia wetland ecosystem in the sanjiang Plain

LI Xin-Hua,LIU Jing-Shuang,SUN Zhi-Gao,YANG Ji-Song,

生态学报 , 2007,
Abstract: Using the compartment model, the sulfur distribution and cycle in each compartment of atmosphere-plant-soil system were studied in Calamagrostis angustifolia wetland ecosystem in the Sanjiang Plain. The results showed that the soil was the main storage and current hinge of sulfur in which 97.78% sulfur was accumulated, while only 2.22% sulfur in the plant. In the plant subsystem, the root was the main storage of sulfur and it remained 79.60% of the total sulfur. Sulfur turnover in the Calamagrostis angustifolia wetland ecosystem showed that the aboveground parts took up 0.75 g S/m^2 and the re-translocation amounts to the root were 0.24 g S/m^2, and to the litter were 0.51 g S/m^2 ; the root took up 3.76 g S/m^2 and the translocation amounts to the soil were 3.07 g S/m^2 ; the amounts of sulfur in the litter were 0.75 g S/m^2 a and the translocation amounts to the soil were more than 0. 52 g S/m^2 a. The emission amounts of H2 S from the Calamagrostis angustifolia wetland ecosystem to the atmosphere were 1.42 mg S/m^2, while COS was absorbed by the Calamagrostis angustifolia wetland from the atmosphere and absorption amounts were 1.83 mg S/m^2 ; the input amounts of sulfur from the rain amounts were 5.26 acidification in the to the ecosystem were 4.85mg S/m^2 during the growing season. The difference between input and output mg S/m^2, which indicated that sulfur was accumulated in ecosystem and would lead to the wetland future.
Analysis of environmental air quality trends and driving factors of mining cities in central Liaoning

GU Kang-Kang,LIU Jing-Shuang,WANG Yang,

中国科学院研究生院学报 , 2009,
Abstract: 辽中地区矿业城市是中国重要的能源生产和重工业基地,研究其环境空气质量变化及其影响因素有利于改善空气质量恶化的现状,促进经济、生态协调发展.利用鞍山、抚顺和本溪的环境空气质量定点监测数据,采用:Daniel的趋势检验方法分析了鞍山、抚顺和本溪2001~2006年市区环境空气质量的变化趋势,并探讨了主要影响因素.结果表明,2001~2006年,辽中地区矿业城市市区空气污染较为严重,月降尘、PM10全部年份超标严重,SO2部分年份超标,属于典型的煤烟型污染.鞍山市区各类污染物变化不显著,除SO2略呈上升趋势,其余污染物均呈下降趋势;抚顺市区除PM10呈显著下降趋势(p<0.1),其余污染物均呈上升趋势,其中NO2呈显著上升趋势(p<0.1);本溪市市区各类污染物均呈下降趋势.空气污染季节和空间差异显著,冬春季污染程度明显高于夏秋季,工业区、交通区显著高于居民区、清洁区.经济增长带来的能源需求压力、环境保护措施的实施,以及各个市区独特的地理位置和气象条件的相互作用,是辽中地区矿业城市市区空气环境质量变化的主要影响因子.因此,需要改善以煤炭为主的能源消费结构、加强机动车尾气排放管理、合理规划城市布局、从区域整体上提高大气环境容量,从而改善辽中地区矿业城市环境空气质量.
Simulation of water environmental carrying capacity in Liaohe watershed

ZHAO Wei,LIU Jing-Shuang,KONG Fan-E,

中国科学院研究生院学报 , 2008,
Abstract: Water environmental carrying capacity (WECC) complex system is characterized by high-step, multi-variables, multi-loops and nonlinear feedback structure. Based on this, the simulation model of WECC in liaohe watershed is built using system dynamics, in order to explore the dynamic variation of WECC in Liaohe watershed of Liaoning Province and its driving factors. The validity test of the model showed that the simulation model constructed could be used to simulate the dynamic variation of WECC and analyze the effect of development policy. From 1996 to 2005, WECC of the region fluctuated significantly, and water environment overloaded with the trend of Deterioration. Water environment is the dependent factor of WECC, but effect of water environmental management on WECC increased gradually. Four schemes of WECC adjustment were designed, and the simulation model constructed was applied to simulate the dynamic variation of WECC in order to select the optimal scheme.
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