摘要
荒漠植被类型和条件与啮齿动物的关系,是多年来干旱区动植物关系研究值得关注的问题之一。为较为全面的了解荒漠啮齿类数量与栖息环境间的关联度,明确荒漠啮齿动物与其栖息环境中植物因子的关系,2005～2007年,对内蒙古阿拉善荒漠区过牧干扰下啮齿动物优势种种群的密度和植物因子的关系进行了多元逐步回归分析。全年分析发现,小毛足鼠(Phodopus roborovskii)和三趾跳鼠(Dipu s sagitta)均为优势种,平均捕获量比例分别为(38.82±4.34)%和(38.44±4.27)%;同时小毛足鼠密度与沙木蓼(Atraphaxis frutescen)密度显著正相关,三趾跳鼠密度与白刺(Nitraria tangutorum)密度显著负相关。在春、夏和秋不同季节,小毛足鼠密度分别与沙木蓼密度、霸王(Zygo-phyllum pterocarpum)密度和红砂(Reaumures soongorica)密度均显著正相关;三趾跳鼠密度在春季与白刺高度正相关,在夏季与藏锦鸡儿(Caragana spinifera)高度显著负相关,在秋季与藏锦鸡儿密度显著正相关。植物因子对阿拉善荒漠区过牧干扰下优势鼠种密度的作用具有明显差异,同时优势鼠种对微生境中植物的利用也显著不同,从而形成相互适应、长期共存的格局。
It is one of the key problems in arid environment studies for long time that relationships of the desert vegetation conditions and rodent populations.Therefore,the relationships between the densities of dominant rodent species and plant factors under the over-grazing disturbance were analyzed by using multiple stepwise regression method in Alashan Desert Region of Inner Mongolia from 2005 to 2007.The results showed that Phodopus roborovskii and Dipus sagitta were the ascendant species,and the average ratios of captured were 38.82%±4.34% and 38.44%±4.27% during three years,respectively.And the population size of Phodopus roborovskii was positive correlation with density of Atraphaxis frutescen during three years,and was successively positive correlation with density of Atraphaxis frutescen,density of Zygophyllum pterocarpum and density of Reaumures soongorica in three seasons.Whereas the population size of Dipus sagitta was negative correlation with density of Nitraria tangutorum in different years,and was positive correlation with height of Nitraria tangutorum in spring,density of Caragana spinifera in autumn,and was negative correlation with height of Caragana spinifera in summer.It showed that the main plant factors that influenced the densities of the dominant rodents presented significant differences,and the microhabitat of the two dominant species was obvious isolate.Therefore,they could be interadaptation and coexistence for a long time.
出处
《内蒙古农业大学学报（自然科学版）》
CAS
北大核心
2012年第3期113-119,共7页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
国家自然科学基金项目(No.30560028
30760044)
质检公益性科研专题项目(200910205)
国家林业局林业科技成果推广项目(2008-02)
中央级公益性科研院所基本科研业务费专项资金(中国农业科学院草原研究所)资助项目
关键词
啮齿动物
优势种
种群数量
植物因子
过牧
荒漠
Rodents
dominant species
population size
plant factors
over-grazing
desert
