摘要
在实验室条件下 ,以随机区组设计的新鲜紫花苜蓿叶片斑块 ,测定苜蓿叶片可利用性变量 ,叶片密度、生物量密度和叶片大小对根田鼠瞬时摄入率的作用格局。苜蓿叶片大小对根田鼠摄入率具有显著作用 (P <0 0 1 ) ,而叶片密度与生物量作用则不显著 (P >0 0 5 ) ;根田鼠摄入率对其口量变化能作出 2倍以上的反应 (P <0 0 1 ) ;观测摄入率与模型预测摄入率的回归显著 (P <0 0 1 )。研究结果证明 ,以叶片大小替代根田鼠口量是影响其摄入率的独立变量 ;检验了植物大小是替代植食性哺乳动物口量的有效变量 。
The effects of the set of alfalfa leaf availability variables, biomass density and leaf density and leaf size on the patterns of instantaneous intake rates of root voles, Microtus oeconomuswere measured on the fresh alfalfa leaf patches by random blocked design in laboratory Leaf size had a significant effect on the voles intake rates( P < 0 01), while leaf size and biomass density had no effects( P > 0 05 ) We observed over two fold increase in intake rates in response to increased bite size( P < 0 01 ) The regression between the observed and predicted intake rates was significant( P < 0 01 ) These results indicated that leaf size as a surrogate for bite size is a main variable, so we tested the hypotheses that plant size is mammalian herbivores , bite size surrogator, and that plant size as an independent variable influence on mammalian herbivores , bite size
出处
《兽类学报》
CAS
CSCD
北大核心
2001年第4期279-286,共8页
Acta Theriologica Sinica
基金
国家自然科学基金资助项目 (3 8970 1 4 9)
中国科学院海北高寒草甸生态系统开放站基金资助项目(2 0 4 0 74 0 )
关键词
根田鼠
瞬时摄入率
植物可利用性变量集
口量
功能反应
Root voles( Microtus oeconomus )
Instantaneous intake rate
Set of plant availability variables
Bite size
Functional response
