四川小寨子沟国家级自然保护区绿尾虹雉种群密度调查与栖息地评价

Population Density Estimation and Habitat Suitability Assessment of Lophophorus lhuysii During Breeding Season in Xiaozhaizigou National Nature Reserve,Sichuan Province

2015年6—8月和2016年3—8月,在四川小寨子沟国家级自然保护区及周边地区,采用绝对密度调查法,对繁殖期绿尾虹雉Lophophorus lhuysii的密度进行了调查,并基于Max Ent对繁殖期绿尾虹雉的栖息地质量进行了评价。结果显示:在保护区及其周边区域内,绿尾虹雉繁殖期常活动于海拔3 500~4 100 m靠近阳坡的草甸、灌丛生境。在整个评价区域内适宜栖息地120.05 km^2,次适宜栖息地141.67 km^2;在保护区内繁殖期绿尾虹雉的平均密度为4.99只/km^2,适宜栖息地49.17 km^2,次适宜栖息地48.27 km^2,推测其种群数量为245只。放牧、资源采集等人类活动是影响绿尾虹雉种群密度的主要因子,因此在本区域的保护区网络间需要加强对人类活动的控制,限制放牧活动,以保护高海拔区域的生物多样性。

From June to August in 2015 and March to August in 2016,by using population census method,the density of Chinese monal（ Lophophorus lhuysii） was investigated in Xiaozhaizigou National Nature Reserve and its surrounding region during breeding season. And the habitat quality of Chinese monal was assessed based on Max Ent modeling. The results showed that： during the breeding season,Chinese monal occurred in the meadow and shrub habitat at the altitude between3 500-4 100 m but with sunny slope. Throughout the entire study area,the suitable habitat covered an area of 120. 05 km^2 and the sub-suitable habitat covered 141. 67 km^2. The suitable and sub-suitable habitat area was 49. 17 km^2 and 48. 27 km^2 in the Xiaozhaizigou Nature Reserve,respectively. The population density of Chinese monal was estimated as 4. 99 adults/km^2,and the population size within the Xiaozhaizigou Nature Reserve was evaluated to be 245 adults. Grazing and herb collection are likely the main local disturbance threating Chinese monal population. Therefore,it is necessary to control the grazing activities and other human disturbances in the nature reserve to protect the biodiversity of alpine regions.