食物可利用性 meaning in English

food availability

We constructed fences using 2 x 2 x 2 factorial design to examine the effect patterns of food availability , predation and interspecific competition on population dynamics and spatial behavior of reed voles , microtusfortis . we expected to test two hypothesises : ( 1 ) availability of high quality food , predation and interspecific competition have independent and addictive effects on population system dynamics for small mammalia herbivore ; ( 2 ) availabiliry of high quality food could reduce home range and aggressive behavior level between individuals of microtine , predation and interspecific competition have independent effects on spatial behavior of microtine
以2 2 2析因实验设计，在野外围栏条件下，探讨食物可利用性、捕食及种间竞争对沼泽田鼠( microtusfortis )种群动态及空间行为的作用，旨在检验下述特定假设： ( 1 )高质量的食物可利用性、捕食及种间竞争对植食性小哺乳动物种群系统动态具有独立的和累加的效应； ( 2 )高质量的食物可利用性可降低田鼠个体间的攻击行为水平，并导致其巢区减小；捕食与种间竞争对田鼠的空间行为亦有独立的作用。