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Shifts in foraging behavior of wintering Hooded Cranes(Grus monacha) in three different habitats at Shengjin lake, China

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Chinese Birds 2016年第3期7卷 167-173页

作者： Wenjing Wan Lizhi Zhou Yunwei Song School of Resources and Environmental Engineering Anhui University Institute of Biodiversity and Wetland Ecology Anhui University Anhui Biodiversity Information Center Shengjin lake national nature reserve of Anhui Province

Background: Wetland loss and degradation result in a reduction in the availability and quality of food for wintering waterbirds. Birds normally modify their foraging behavior to adapt to variations in food availability. In this study, we compared shifts in foraging behavior of Hooded Cranes(Grus monacha) in three different habitats at Shengjin lake, China to understand the response of these cranes to changes in ***: We investigated the food density and foraging behavior of Hooded Cranes in Shengjin lake national nature reserve from November 2014 to April 2015. We used regression equations to describe the changes in food density. A total of 397 behavioral observations were used in the analyses of their foraging efforts. We fitted a candidate set of generalized mixed linear models to analyze the relationship of foraging efforts and food density. We used a method of information theory to guide the selection of the model and Akaike's Information Criterion to calculate the value of each model. The relationship between food density, disturbances and foraging behavior was illustrated using a generalized linear ***: Along with the temporal variation and exploitation of food biomass, the food density varied widely among foraging sites. During the early winter period, foraging efforts were more pronounced in the paddy fields and meadows but not significantly different among the three habitats. The cranes spent more foraging effort in the paddy fields and meadows during the middle stage and in the meadows and mudflats during the late winter. The results of the generalized linear model showed that food density and disturbances had different effects on the rate of foraging success during the winter, while the effect of foraging effort was not significant. Furthermore, the rate of feeding success was markedly affected by disturbances in the paddy fields. The combined action of food density and disturbances had a significant effect on the rate of foraging suc

关键词： Food density Foraging behavior Habitat quality Hooded Crane

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Effects of variation in food resources on foraging habitat use by wintering Hooded Cranes(Grus monacha)

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Chinese Birds 2015年第3期6卷 186-195页

作者： Meng Zheng Lizhi Zhou Niannian Zhao Wenbin Xu School of Resources and Environmental Engineering Anhui University Institute of Biodiversity and Wetland Ecology Anhui University Anhui Biodiversity Information Center Shengjin lake national nature reserve of Anhui Province

Background:The ideal habitat use of waterbirds can be considered to be fixed,but current habitat use depends on environmental conditions,especially those of food characteristics,considered crucial to their use of *** how waterbirds respond to variation in food availability at degraded wetland sites and change their habitat use patterns over spatial and temporal scales should direct future conservation *** objectives of this study were to identify these spatial-temporal foraging habitat use patterns of Hooded Cranes(Grus monacha)and their relationship with food characteristics in the severely degraded wetlands of the Shengjin and Caizi lakes along with the Yangtze River ***:We investigated the changes in food characteristics,relative abundance and density of Hooded Cranes in various habitat types across three winter periods from November 2012 to April *** examined the effect of these winter periods and habitat types on the pattern of use by the cranes and explored the relationship between these patterns and food characteristics using linear ***:The food characteristics and habitat use clearly changed over spatial-temporal *** the early and mid-winter periods,the most abundant,accessible and frequented food resources were found in paddy fields,while in the late period the more abundant food were available in meadows,which then replaced the paddy *** were fewer effects of winter periods,habitat types and their interactions on habitat use patterns except for the effect of habitat types on the relative abundance,determined as a function of food abundance,but independent of food depth and sediment ***:In response to the degradation and loss of lake wetlands,the cranes shifted their habitat use patterns by making tradeoffs between food abundance and accessibility over spatial-temporal scales that facilitated their survival in the mosaic of these lake wetlands.

关键词： Hooded Crane(Grus monacha) Habitat use Food characteristics Wintering ecology Foraging habitat

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Local temperature and El Niño Southern Oscillation influence migration phenology of east Asian migratory waterbirds wintering in Poyang,China

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Integrative Zoology 2017年第4期12卷 303-317页

作者： Fei XU Guanhua LIU Yali SI Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTsinghua UniversityBeijingChina Jiangxi Poyang lake national nature reserve authority Jiangxi Poyang Lake Wetland Ecosystem National Research StationNanchangChina Resource Ecology Group Wageningen UniversityWageningenthe Netherlands Center for Tropical Research Institute of the Environment and SustainabilityUniversity of CaliforniaLos AngelesCaliforniaUSA

Temperature is a critical factor influencing avian phenology,due to its direct impact on food and water *** previous studies have focused on the timing of spring migration and the arrival of birds at breeding grounds along the European and American flyways;little is known about migration ecology at the wintering sites along the Asian *** linear regression models,this study investigates how local temperature variation and EI Niño Southern Oscillation(ENSO)influences the arrival and departure timing of 9 waterbird species breeding in Mongolia or Siberia and overwintering in Poyang,China from 2002 to *** mainly arrive at Poyang in October and depart for their breeding sites in *** of the 9 species,6 show a strong negative relationship between departure time and overwintering temperature in *** dates also show a negative association with overwintering ENSO and March ENSO for two *** local and large-scale climate indices show no influence on the arrival timing of *** suggest that birds react to the annual variation of overwintering temperature:an earlier departure of waterbirds is facilitated by a warmer overwintering period and vice *** long-term accumulated temperature effect is more pronounced than ENSO and the short-term local temperature *** findings could help quantify the potential impact of global warming on waterbirds.

关键词： annual temperature variation arrival and departure time ENSO local accumulated temperature overwintering birds

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Effect of Water Level Fluctuations on Wintering Goose Abundance in Poyang lake Wetlands of China

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Chinese Geographical Science 2017年第2期27卷 248-258页

作者： XIA Shaoxia LIU Yu CHEN Bin JIA Yifei ZHANG Huan LIU Guanhua YU Xiubo Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China The Second Surveying and Mapping Institute of Zhejiang Province Hangzhou 310012China Jiangxi Poyang lake national nature reserve authority Nanchang 330038China

The Poyang lake is a Ramsar site and is the important over-wintering site for migratory waterbirds along the east Asian–Australasian Fly way. Examining the effects of water level fluctuations on waterbird abundance and analyzing the influencing mechanism is critical to waterbird protection in the context of hydrological alteration. In this study, the effect of water level regime on wintering goose abundance was examined and the influencing mechanism was interpreted. Synchronous waterbirds survey data, hydrological data, Moderate Resolution Imaging Spectroradiometer-Normalized Difference Vegetation Index(MODIS-NDVI) data and habitat data derived from Landsat TM/ETM data and HJ/CCD data were combined. The satellite-derived Green Wave Index(GWI) based on MODIS-NDVI dataset was applied to detect changes in goose food resources. It was found that habitat size and vegetation conditions are key factors determining goose abundance. Geese numbers were positively correlated with habitat area, while intermediate range of vegetation productivity might benefit the goose abundance. Water level affects goose abundance by changing available habitat areas and vegetation conditions. We suggested that matching hydrological regime and exposed meadows time to wintering geese dynamics was crucial in the Poyang lake wetlands. Our study could provide sound scientific information for hydrological management in the context of waterbird conservation.

关键词：浇水平变化 wintering 鹅规范的差别植被索引(NDVI ) 格林波浪索引(GWI ) waterbird 产地

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Growth inhibition and oxidative damage of Microcystis aeruginosa induced by crude extract of Sagittaria trifolia tubers

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Journal of Environmental Sciences 2016年第5期28卷 40-47页

作者： Jiang Li Yunguo Liu Pingyang Zhang Guangming Zeng Xiaoxi Cai Shaobo Liu Yicheng Yin Xinjiang Hu Xi Hu Xiaofei Tan College of Environmental Science and Engineering Hunan University Changsha 410082 China. Key Laboratory of Environmental Biology and Pollution Control (Hunan University) Ministry of Education Changsha 410082 China School of Architecture and Art Central South University Changsha 410082 China School of Metallurgy and Environment Central South University Changsha 410083 China College of Environmental Science and Engineering Research Central South University of Forestry and Technology Changsha 410004 China Hunan east dongting lake national nature reserve Administration Yueyang 414000 China

Aquatic macrophytes are considered to be promising in controlling harmful cyanobacterial blooms. In this research, an aqueous extract of Sagittaria trifolia tubers was prepared to study its inhibitory effect on Microcystis aeruginosa in the laboratory. Several physiological indices of M. aeruginosa, in response to the environmental stress, were analyzed. Results showed that S. trifolia tuber aqueous extract significantly inhibited the growth of M. aeruginosa in a concentration-dependent way. The highest inhibition rate reached 90% after 6 day treatment. The Chlorophyll-a concentration of M. aeruginosa cells decreased from 343.1 to314.2 μg/L in the treatment group. The activities of superoxide dismutase and peroxidase and the content of reduced glutathione in M. aeruginosa cells initially increased as a response to the oxidative stress posed by S. trifolia tuber aqueous extract, but then decreased as time prolonged. The lipid peroxidation damage of the cyanobacterial cell membranes was reflected by the malondialdehyde level, which was notably higher in the treatment group compared with the controls. It was concluded that the oxidative damage of M. aeruginosa induced by *** tuber aqueous extract might be one of the mechanisms for the inhibitory effects.

关键词： Microcystis aeruginosa Sagittaria trifolia Cyanobacterial inhibition Oxidative damage Antioxidant response

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Phylogenetic conservatism in threatened species responses to climate change differs between functional types in the Gongga Mountains of China

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Journal of Mountain Science 2023年第12期20卷 3568-3581页

作者： ZU Kui-ling Nawal SHRESTHA JIANG Yong JIA Guo-qing PENG Shi-jia ZHU Xiang-yun WANG Zhi-heng Key Laboratory of national Forestry and Grassland Administration on Forest Ecosystem Protection and Restoration of Poyang lake Watershed College of ForestryJiangxi Agricultural UniversityNanchang 330045China Institute of Ecology and Key Laboratory for Earth Surface Processes of the Ministry of Education College of Urban and Environmental SciencesPeking UniversityBeijing 100871China State Key Laboratory of Plant Diversity and Specialty Crops Institute of BotanyChinese Academy of SciencesBeijing 100093China State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems College of EcologyLanzhou UniversityGansuLanzhou 730000China Administration of Gongga Mountain national nature reserve Kangding 626000China

Climate change has become one of the most critical threats to global ***,whether phylogenetically related species respond to climate change in similar ways remains *** answer to this question is crucial for understanding the impacts of climate change and the conservation on the tree of *** integrating species distribution models with a molecular phylogeny of 50 threatened plant species from one of the global biodiversity hotspots,Gongga Mountains(***)in southwest China,we evaluated the responses of threatened plant species to future climate change,and estimated whether species responses are phylogenetically *** reconstruction was used to calculate the phylogenetic distance and null model to verify the reliability of the *** found that correlations between responses of different species to future climate change decreased with the increase in their phylogenetic distance in the monocotyledonous or herbaceous species,but not in the dicotyledonous and woody *** results suggested that the responses of herbaceous and monocotyledonous threatened species in *** to future climate change tend to be phylogenetically conserved,while the responses of woody and dicotyledonous threatened species are *** study provides evidence for the existence of phylogenetically non-random extinction in the monocotyledonous herbs in *** and highlights the importance of integrating phylogenetic information and evolutionary history into conservation *** also provide theoretical basis and technical support for designing effective conservation schemes for the protection of biodiversity under anthropogenic climate change.

关键词： Conservation strategies Climate suitability Mountain plants Phylogenetic distance Species distribution models

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Foraging behavior of the Greater White-fronted Goose(Anser albifrons) wintering at Shengjin lake: diet shifts and habitat use

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Avian Research 2020年第1期11卷 65-73页

作者： Yanguang Fan Lizhi Zhou Lei Cheng Yunwei Song Wenbin Xu School of Resources and Environmental Engineering Anhui UniversityHefei 230601China Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration(Anhui University) Hefei 230601China Anhui Shengjin lake national nature reserve Dongzhi 247200China

Background: The habitat use and foraging behaviors of waterbirds are closely related to the distribution and abundance of their food resources. Reductions in food supply can cause waterbirds to shift their habitats and adjust their foraging behaviors to meet their nutritional requirements and increase fitness. Seasonal withdraw of the water levels in the river-connected lakes in the middle and lower Yangtze River floodplain provides abundant food resources for the wintering Greater White-fronted Goose(Anser albifrons). Sedge(Carex) meadows are critical foraging habitats for herbivorous waterbirds in the hydro-fluctuation belt, which changes with hydrological conditions and climate. This study aimed to examine the behavioral responses of the Greater White-fronted Goose to temporal-spatial changes of food availability in the Sedge ***: Fields surveys were carried out at Shengjin lake from November 2017 to April 2018. According to the phenology of Shengjin lake, we divided the wintering season into three periods. The food density, minimum temperature, food items, grass height, and number of foraging geese were surveyed, and samples of the foraging behavior were collected. We analyzed the relationship of the foraging behavior and habitat use relative to the food resources, using correlation and linear regression ***: Along with the temporal-spatial variation and exploitation of food resources, the food abundance and items varied widely among the foraging sites. Over the whole wintering period, the foraging habitat with the highest utilization rate was the meadows, followed by the paddy fields, and then mudflats. Furthermore, the utilization of the meadows showed a bimodal distribution trend, while the paddy fields showed a unimodal trend, and a decreasing trend was seen in the mudflats over the whole wintering period. The results of the generalized linear model showed that the foraging rate was related to the food density and grass height, with

关键词： Foraging behavior Foraging rate Food resources Grass height Habitat use

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Effects of foraging site distances on the intestinal bacterial community compositions of the sympatric wintering Hooded Crane(Grus monacha)and Domestic Duck(Anas platyrhynchos domesticus)

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Avian Research 2021年第2期12卷 269-279页

作者： Wei Wang Lizhi Zhou Rong Fu Lei Cheng Shaofei Yan Nazia Mahtab Yunwei Song School of Resources and Environmental Engineering Anhui UniversityHefei 230601China Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration Anhui UniversityHefei 230601China Admin-istrative Office of Anhui Shengjin lake national nature reserve Dong-zhi 247210China

Background:The composition of intestinal microflora in animals is affected by cross-species *** a nature reserve,the foraging sites of waterbirds are relatively fixed,but frequently close to residential areas and can also be visited by domestic *** is easy to result in the trans-species-flock dispersal of gut microbes between the wild birds and domestic *** effects of the variable foraging site distances on the gut microbe structures of the waterbirds and the sympatric domestic fowls are currently unclear,and further research is required to evaluate the impacts of geographic location on ***:Illumina high-throughput sequencing and bioinformatics analysis software were utilized to compare and analyze the composition of gut microbes from the fecal samples of Hooded Cranes(HC;Grus monacha)and two groups of Domestic Ducks(Anas platyrhynchos domesticus)that foraged at 1 km(ducks in near areas,D-N),and 4 km(ducks in far areas,D-F)away from the habitats of the Hooded Cranes at Shengjin lake,***:The results showed that there were significant differences in the alpha-diversity of the gut bacteria in the HC,D-N,and D-F samples under the interspecific distance *** dominant bacterial phyla,Cyanobacteria and Proteobacteria,showed correlations with distance for each *** D-N group had more diverse intestinal flora than the D-F,as they were physically closer to the HC and had more indirect contact and cross-transmission of their gut *** potentially pathogenic bacterial sequences,and Operational Taxonomic Units(OTUs)were found in the D-N than in HC and ***:Hooded Cranes and the Domestic Duck populations at variable distances from the cranes showed significant differences in their intestinal bacteria and potentially pathogenic *** closer the foraging sites were,the easier the intestinal flora spread across *** results provide a basis for determining the safe distance between wild bi

关键词： Bacterial community Domestic Ducks Gut microbes Hooded Cranes Inter-species dispersal Intestinal microbe

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RS-based Evaluation of Forest Cover Changes in Nanling national nature reserve

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Journal of Landscape Research 2015年第5期7卷 33-37,40页

作者： LIU Zongjun LIAO Fangjun Nanling national nature reserve Shenzhen Fairy lake Botanical Garden Chinese Academy of Sciences

3S technology was applied to analyze spatio-temporal changes of landscape pattern in Nanling national nature reserve and the driving forces. The results showed that the study area was dominated by forest landscape from 1988 to 2009, accounting for 95% of the total area, among all forest landscapes, evergreen broadleaved forest accounted for the largest ratio(>50%). In terms of landscape fragmentation, landscape density index of the study area increased, landscape fragmentation was aggravated; patch density of core zone declined slightly, mean patch area of all landscape types increased, landscape fragmentation decreased slightly; buffer zone and experimental zone witnessed the aggravation of fragmentation. In terms of landscape diversity, landscape pattern of the study area became increasingly complex, diversity index increased, landscape heterogenization was enhanced; landscape diversity of the core zone increased slightly, that of the buffer zone increased greatly, but that of the experimental zone declined and landscape heterogenization reduced. Landscapes in the whole area grew more diversified, while landscape pattern of the core zone was simplified, that of the buffer zone witnessed slight changes, and that of the experimental zone kept consistent with that of the study area. In terms of driving forces of landscape pattern change, natural factors have contributed to the landscape changes in the study area, but human factors such as forest management, forest tourism, local residents an economic factors played a dominant role. With the increasing external interventions to the landscape pattern change, the contradiction between landscape eco-environment protection and resource development and utilization in Nanling national nature reserve will be increasingly sharpened.

关键词： Forest landscape pattern Landscape index nature reserve Driving force

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Genetic analysis of the br gene in halophilic archaea isolated from Xinjiang region, China

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Frontiers in Biology 2008年第4期3卷 392-396页

作者： Xiaohong XU Min WU Huibin ZHANG Zhihu LIU Ningbo Institute of Technology Zhejiang UniversityNingbo 315100China College of Life Sciecne Zhejiang UniversityHangzhou 310027China The Altun Mountain national nature reserve Kuerle 841000China

Some novel members of extremely halophilic archaea,strains AJ11,AJ12 and AJ13,were isolated from the Aularz lake located in the Altun Mountain national nature reserve of Xinjiang,Uygur Autonomous Region in *** DNA fragments encoding a bacteriorhodopsin(BR),as well as for 16S rRNA of isolated strains,were amplified by PCR and their DNA sequences were determined *** the basis of homology and phylogenetic analysis of the 16S rDNA,we thought that the isolated strains forming a microbiological population are the members of the genus *** results of genetic analysis,such as GC content,transition/transversion(Ti/Tv)rate ratios and synonymous substitution rates(Ks)indicate that the br fragments,with a high level of genetic divergence,are faced with both purifying selection and bias mutation *** study provides the basis for use of species and BR proteins resources.

关键词： halophilic archaea 16S rDNA phylogeny bacteriorhodopsin genetic analysis

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