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Foraging habitat selection of overwintering Black-necked Cranes in the farming area surrounding the caohai Wetland, Guizhou Province, China

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Avian Research 2020年第1期11卷 74-82页

作者： Dawei Wu Canshi Hu Mingming Zhang Zhumei Li Haijun Su Forestry College Guizhou UniversityGuizhou 550025China Research Center for Biodiversity and Natural Conservation Guizhou UniversityGuizhou 550025China College of Life Sciences Guizhou UniversityGuizhou 550025China Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region(Guizhou University) Ministry of EducationGuizhou 550025China Guizhou Institute of Biology Guizhou 550005China

Background: Understanding how overwintering birds choose foraging habitats is very important for conservation management. The overwintering Black-necked Crane(Grus nigricollis) feeds on crop remains in farmlands;thus, reasonable conservation management of this type of farmland that surrounds wetlands is critical for the overwintering populations of the Black-necked Crane;however, it is not clear how the Black-necked Crane chooses the foraging land in the ***: A thorough field positioning survey of all foraging sites in farmland areas around the caohai Wetland and a-sampling analysis of habitat selection by the Black-necked Crane were conducted during the winters from 20162017 and ***: Multiple factors contributed to the selection of foraging habitat in farmlands, i.e., food factors(crop remains and tillage methods) > human disturbance factors(distance to road and settlement) > topography factors(slope aspect), listed according to the strength of influence. Additionally, Black-necked Cranes tend to choose farmland sites where there was no machine tillage, the crop remains were > 500 g/m^2, the distance to residences ranged from 100 to 500 m, the distance to roads ranged from 50 to 100 m, and the slopes exhibited western or eastern aspects. As the winters progressed, the volume of the edible crop remains declined, and the influences of the other main factors also changed, i.e., the factors of human disturbance(distance to road and settlement) became less important, while the effect of the food factor(crop remains) was strengthened. Thus, the foraging sites near the road became more ***: The farming area surrounding the caohai Wetland is very important for the overwintering Black-necked Crane. Food factors and human disturbance factors are the main factors that influence the choice of feeding ground.

关键词： Black-necked Crane caohai wetland in Guizhou Farmland around the wetland Foraging habitat selection Overwintering period

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Primary Establishment of EWE Model in caohai Nature Reserve

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Meteorological and Environmental Research 2011年第7期2卷 1-4,11页

作者： OUYANG Li-jian1,LIU Wen2,WANG Yan-bin1,HU Si-yu1 1.Environment & Life Sciences Department,Bijie University,Bijie 551700,China 2.Administration Bureau of caohai National Natural Reserve in Guizhou,Weining 553100,China

According to environmental data,Ecopath with Ecosim (EWE) model can quantitatively describe the energy flow in the production and consumption of function components of system by using trophodynamics,and accurately assess the biomass and stable state of aquatic *** the paper,the basic principle and parameters of EWE model were introduced firstly,and the relationship between Q/B (the important parameter of EWE model) and basic life indices of fish was discussed,then the current study and typical results of EWE model were analysed,finally the related parameters of EWE model in caohai Nature Reserve were analysed.

关键词： Aquatic resources EWE model Energy flow caohai China

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Dynamic Assessment on Ecological Frangibility of the caohai Wetland in Guizhou Province

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Journal of Landscape Research 2015年第6期7卷 59-62页

作者： HU Baofang AN Yulun School of Geographic and Environmental Sciences Guizhou Normal University Key Laboratory of Mountain Resources and Environmental Remote Sensing Guizhou Normal University

By analyzing current situation of the Caihai Wetland, combining with "3S" technology, theory of ecosystem health, landscape ecology theory, applying the model of Pressure–State–Response, this paper assessed dynamic changes of ecological frangibility of the caohai Wetland in Guizhou in 1992, 2000 and 2013. The results showed that the wetland ecosystem had sound principal functions, but also witnessed different degrees of degradation. The ratio of basic complete ecosystem landscape area in the caohai Wetland reduced from 70.56% in 1992 to 66.26% in 2013, and the ratio of destructed landscape area increased from 12.11% in 1992 to 13.38% in 2013.

关键词： Wetland ecological frangibility PSR assessment model caohai Wetland ecosystem

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AAssessment of the spatial-temporal eutrophic character in the Lake Dianchi

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Journal of Geographical Sciences 2005年第1期15卷 37-43页

作者： XINGKexia GUOHuaicheng SUNYanfeng HUANGYongtai CollegeofEnvironmentalSciences Peking-UniversityBeijing100871China YunnanInstituteofEnvironmentalScience Kunming650034China

Water-quality deterioration and eutrophication of the Lake Dianchi have acquired more and more attention in the last few decades. In this paper, the spatial and temporal eutrophication status of the Lake Dianchi was assessed. The comprehensive trophic state index was chosen to assess the trophic status of the Lake Dianchi in the past 13 years. The result reveals that the trophic condition of caohai is more serious than that of Waihai. Most of time caohai was in extremely hypereutrophic state from 1988 to 2000. The trophic condition of Waihai had a worsening tendency from 1988 to 2000. Waihai was in eutrophic state before 1995, but it got in a hypereutrophic state after 1995. It was pointed out that TN and TP were the two biggest contributors of CTSIM in both caohai and Waihai.

关键词： Lake Dianchi caohai Waihai eutrophication assessement TSI

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