检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:刘志霄[1] 盛和林[2] 李元广 王绍绽 赵登海 杜和平
机构地区:[1]新疆大学生物系,乌鲁木齐830046 [2]华东师范大学生物学系,上海200062 [3]内蒙古贺兰山国家级自然保护区管理局,巴彦浩特750306 [4]宁夏贺兰山国家级自然保护区管理局,银川750021
出 处:《生态学报》2000年第3期463-467,共5页Acta Ecologica Sinica
基 金:国家教委博士点基金;日本环境保护协会资助项目
摘 要:贺兰山林区是一个孤立的“林岛”,区内马麝总数量估计为 1 83~ 2 2 7头 ,主要零星地分布于陡坡林中 ,已处于濒危状态。1 980年以前马麝种群衰退的主要原因是灌木林的急剧减少 ,1 980年以后种群衰退的主要原因则是钢丝套偷猎。建立严励的“奖惩制度”。The forest at Helan Mountain was isolated about 1 500 years ago.The estimated population size of alpine musk deer( Moschus chrysogaster) in the forest were 227 and 183 individuals in the autumn of 1995 and spring of 1996, respectively.The musk deer distributed scatterly in the trees of the steep slopes,and the population densities were very low.We suggested that the population were on the verge of extinction.The population has being disturbed and threatened by lots of environmental factors since 1950s,and the current status was their comprehensive result.The major cause of population decline was the lowering of suitable habitat(shrub)before 1980.And the reason of population crash was the poaching with gangsitao(a kind of very simple circular poaching tools only made of iron or steel wires)after 1980.We suggested that Helan Mountain has been drawing into the vicious vortex of both drought and livestock overgrazing.The conservation strategies were discussed.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.3