Black-necked crane(Grus nigricollis,BNC),facing serious threats from human activities and habitat variations,is an endangered species classified as vulnerable under the revised IUCN Red List.In this article,we investi...Black-necked crane(Grus nigricollis,BNC),facing serious threats from human activities and habitat variations,is an endangered species classified as vulnerable under the revised IUCN Red List.In this article,we investigated and analyzed the population and nesting microhabitat of BNCs in the Longbao National Nature Reserve(NNR)from 1978 to 2016,and found the number of BNCs increased from 24 in 1978 to 216 in 2016.This establishment of the Longbao NNR represented the activities of protecting endangered animal species are effective.However,the land cover classification results of Landsat images showed that the marsh wetland,which was the BNC’s primary habitat,decreased during 1978–2016,while artificial buildings increased,which affected the habitat of BNCs.The increase in average temperature over the past 40 years has also had an impact on the number of BNCs.BNCs preferred to nest in marsh wetlands or on islands with open water or star-like distributions through observation.The results of the principal component analysis showed that the nearest distance between nests and habitat type were the primary factors influencing nesting site selection.To protect BNC,we suggest decreasing wetland fragmentation,reducing habitat degradation and providing an undisturbed habitat.展开更多
基于青海玉树隆宝湿地2011年10月-2012年9月气象观测数据,利用组合法计算其近地面的感热通量和潜热通量,进而分析近地面能量收支状况.结果表明:隆宝湿地太阳辐射资源充足,达6 770.8 M J·m^(-2),受积雪影响,冬季日反射率最高可达0.9...基于青海玉树隆宝湿地2011年10月-2012年9月气象观测数据,利用组合法计算其近地面的感热通量和潜热通量,进而分析近地面能量收支状况.结果表明:隆宝湿地太阳辐射资源充足,达6 770.8 M J·m^(-2),受积雪影响,冬季日反射率最高可达0.93;11月和12月地面吸收的90%以上短波能量以辐射形式传给大气,而6月份则不到30%.地面全年以净辐射和土壤热通量吸收能量,其中,77%以潜热形式支出,23%以感热形式支出,但各月能量收支特征与之有所不同.展开更多
基金This research was funded by the National Key Research and Development Plan(2018YFC0809400)undertaken by Chou Xiethe National Natural Science Foundation of China[Grant No.41431174]undertaken by Yun Shaothe National Natural Science Foundation of China[Grant No.41571328]undertaken by Chou Xie.
文摘Black-necked crane(Grus nigricollis,BNC),facing serious threats from human activities and habitat variations,is an endangered species classified as vulnerable under the revised IUCN Red List.In this article,we investigated and analyzed the population and nesting microhabitat of BNCs in the Longbao National Nature Reserve(NNR)from 1978 to 2016,and found the number of BNCs increased from 24 in 1978 to 216 in 2016.This establishment of the Longbao NNR represented the activities of protecting endangered animal species are effective.However,the land cover classification results of Landsat images showed that the marsh wetland,which was the BNC’s primary habitat,decreased during 1978–2016,while artificial buildings increased,which affected the habitat of BNCs.The increase in average temperature over the past 40 years has also had an impact on the number of BNCs.BNCs preferred to nest in marsh wetlands or on islands with open water or star-like distributions through observation.The results of the principal component analysis showed that the nearest distance between nests and habitat type were the primary factors influencing nesting site selection.To protect BNC,we suggest decreasing wetland fragmentation,reducing habitat degradation and providing an undisturbed habitat.
文摘基于青海玉树隆宝湿地2011年10月-2012年9月气象观测数据,利用组合法计算其近地面的感热通量和潜热通量,进而分析近地面能量收支状况.结果表明:隆宝湿地太阳辐射资源充足,达6 770.8 M J·m^(-2),受积雪影响,冬季日反射率最高可达0.93;11月和12月地面吸收的90%以上短波能量以辐射形式传给大气,而6月份则不到30%.地面全年以净辐射和土壤热通量吸收能量,其中,77%以潜热形式支出,23%以感热形式支出,但各月能量收支特征与之有所不同.
