摘要
为明晰环境因子对高原鼢鼠（Eospalax baileyi）种群特征的影响，本研究以高原鼢鼠的种群密度、体重、妊娠率作为其种群特征指标，选择2008～2014年的归一化植被指数（NDVI）、年均降水量和年均温为环境因子，分析种群特征与环境因子在时间尺度上的变化关系。2008～2014年，研究区域归一化植被指数（NDVI）年度间无显著性差异（P〉0．05），高原鼢鼠体重、妊娠率和种群密度年度间均无显著性差异（P〉0．05）；高原鼢鼠雌雄个体体重以及种群密度和妊娠率均与环境因子归一化植被指数（NDVI）、年均降水量及年均温均无相关关系（P〉0．05）。以上结果说明，高原鼢鼠体重变化、妊娠率和种群密度与栖息地植被生长状况及气候因子无相关关系，环境因子对高原鼢鼠种群特征的影响较小。
The Plateau Zokor （Eospalax baileyi） is one of the dominant rat species of the Qinghai-Tibet Plateau and it has an important role in alpine grassland ecosystems. In this study, the zokors were captured by setting the 6 samples each year in the study area （Table 1）; bodyweight, pregnancy rate and population density of Plateau Zokor ere chosen as the index of population features; normalized difference vegetation ondex （NDVI）, the annual average precipitation and temperature from 2008 to 2014 （Table 2） were chosen as the environmental factors. The paper analyzed the relationship between population features of Plateau Zokor and environmental factors in order to clear influence of environmental factors on the population features of Plateau Zokor. The results showed that there was no significant difference on inter-annual NDVI （P 〉 0.05 Fig. 1） and bodyweight, pregnancy rate, population density year to year from 2008 to 2014 （P 〉 0.05, Table 3） With the development of time, the bodyweight of male and female, population density and pregnancy rate had not correlation with the environmental factors such as average annual precipitation and average annual temperature （P 〉 0.05, Fig. 2 - 7）. The above results show that there were no correlation between bodyweight, population density and pregnancy rate of Plateau Zokor and environmental factors, which means the environmental factors had little influence on zokors＇ population features.
出处
《动物学杂志》
CAS
CSCD
北大核心
2016年第5期734-742,共9页
Chinese Journal of Zoology
基金
国家自然科学基金项目(No.31460635)
农业部公益性行业科研项目(No.201203041)
关键词
高原鼢鼠
归一化植被指数
气候因子
繁殖特性
种群密度
Plateau Zokor, Eospalax baileyi
Normalized difference vegetation index, NDVI
Climatic factors
Reproductive characteristics
Population features
