摘要
桂西南喀斯特地区位于中国广西的西南部,属于全球生物多样性热点地区。通过自2003年以来,对该地区雉类进行的调查,共记录到7种雉类,分别是中华鹧鸪(Francolinus pintadeanus)、褐胸山鹧鸪(Arborophila brunneopectus)、棕胸竹鸡(Bambusicola fytchii)、灰胸竹鸡(Bambusicola thoracica)、原鸡(Gallus gallus)、白鹇(Lophura nycthemera)和环颈雉(Phasianus colchicus)。对该地区雉类的生态分布状况及栖息地的植被类型和坡位等空间生态位进行分析和比较的结果表明,原鸡的综合生态位最宽,灰胸竹鸡第二,最窄为中华鹧鸪。综合生态位重叠值最大的是中华鹧鸪--环颈雉和灰胸竹鸡--原鸡。分布范围狭窄、种群数量相对较少及生态适应性较低的褐胸山鹧鸪应该是该地区最易受到威胁的种类。
The Karst mountain area along the Sino-Vietnam border of southwest Guangxi has been designated a ＂Global Biodiversity Hotspot＂ since 2003.We conducted a survey of pheasant species in this area,with seven species recorded,namely Chinese Francolin（Francolinus pintadeanus）,Bar-backed Partridge（Arborophila brunneopectus）,Mountain Bamboo Partridge（Bambusicola fytchii）,Chinese Bamboo Partridge（Bambusicola thoracica）,Red Junglefowl（Gallus gallus）,Silver Pheasant（Lophura nycthemera） and Common Pheasant（Phasianus colchicus）.Analysis and comparison of the distribution and spatial niche of these seven pheasant species revealed that Red Junglefowl had the widest spatial niche,while Chinese Francolin had the narrowest.The spatial niche overlap index was high between Chinese Francolin and the Common Pheasant,Chinese Bamboo Partridge,and Red Junglefowl.With narrow distribution range,small population,and lower ecological adaptability,it is likely that the Bar-backed Partridge is the most vulnerable pheasant species in this area.The results suggest more research and conservation measures are required for pheasant habitat protection in the Karst areas of southwest Guangxi.
基金
国家自然科学基金资助项目(30360012
31172123)
关键词
喀斯特
石灰岩地区
雉类
分布
生态位
Karst
Limestone area
Pheasant
Distribution
Niche breadth
