摘要
蓝马鸡(Crossoptilon auritum)是分布于中国中西部地区高海拔森林灌丛鸟类。本文利用12个可能影响其栖息地适宜性的潜在环境因子和158条蓝马鸡分布数据,基于MaxEnt模型预测蓝马鸡在中国的地理分布格局和限制其分布的主导环境因子。结果表明:蓝马鸡在中国的适宜栖息地面积为2.23×10^(5)km^(2),主要分布于四川省、青海省和甘肃省交界处,并向四周扩散,而次适宜栖息地面积为3.13×10^(5)km^(2),集中分布于适宜栖息地的外围。影响蓝马鸡栖息地适宜性的主要环境因子和最适区间分别为海拔(2000~3800 m)、最暖季均温(9~18℃)、等温性(30%~38%)和植被类型(针阔混交林、针叶林和灌丛)。刀切法检验显示,海拔因子的AUC值最高,且提供了最大增益,是影响蓝马鸡栖息地适宜性的最主要环境因子之一。本研究为进一步明确蓝马鸡适宜栖息地在中国的地理分布格局和制定有效的保护策略提供了科学参考。
Crossoptilon auritum is a bird distributed in high-altitude forests and shrublands of the central and western China.In this study,we used MaxEnt model to predict the geographical distribution of C.auritum in China and examined environmental factors driving its distribution,based on 158 presence points and 12 environmental factors.The results showed that the suitable habitat area of C.auritum was 2.23×10^(5)km^(2)in China,which was mainly distributed at the junction of Sichuan,Qinghai and Gansu provinces and spread out in all directions.The sub-suitable habitat area was 3.13×10^(5)km^(2),concentrated in the periphery of suitable habitats.The main environmental factors and optimum ranges of habitat suitability for C.auritum were altitude(2000-3800 m),mean temperature of the warmest quarter(9-18℃),isothermality(30%-38%)and vegetation types(coniferous-broadleaf mixed forests,coniferous forests,and shrublands).Results of the Jackknife test showed that the AUC(area under curve)value of altitude and its gain was the highest,which was one of the most important environmental factors affecting the habitat suitability of C.auritum.Our findings provide scientific basis for further clarifying the geographical distribution of C.auritum in China and formulating effective conservation strategies.
作者
油志远
王茗
鲁碧耕
刘伟
杨楠
YOU Zhi-yuan;WANG Ming;LU Bi-geng;LIU Wei;YANG Nan(Institute of Qinghai-Tibetan Plateau,Southwest Minzu University,Chengdu 610041,China;College of Animal Husbandry&Veterinary Science,Southwest Minzu University,Chengdu 610041,China)
出处
《生态学杂志》
CAS
CSCD
北大核心
2022年第11期2271-2277,共7页
Chinese Journal of Ecology
基金
西南民族大学中央高校基本科研业务费专项基金项目(2020NQN44)资助。
关键词
蓝马鸡
MaxEnt模型
栖息地适宜性
环境因子
地理分布格局
Crossoptilon auritum
MaxEnt model
habitat suitability
environmental factor
geographical distribution pattern
