非密度制约

可能，在某物种的分布区的边缘，非密度制约因素最为重要。

Probably density-independent factors are more important at the edge of the range of a species .

并且竹笋的死亡率是非密度制约的。

Furthermore , shoot mortality was density independent .

扩散原因是由于环境因素且由非密度制约因素引起的。

Analysis of dispersal reasons showed that the dispersion was brought about by environment elements , especially by density independence factors .

在天然条件下，影响鱯鱼鳋种群消长的主要因素是非密度制约因素和大鳍鱯的免疫反应。

In natural environment , the factors influencing the population growth of the parasite are density of independent factors and immunological responses generated by the host .

主要影响因素是非密度制约因素，但密度制约因素亦有一定影响。

The main effect factors of the quantity change of rodent were " nondensity dependent factor " and the density dependent factors had some effect also .

影响病虫害发生流行的因素较多，包括气象条件、自然环境、生态条件、本身表现出的密度和非密度制约因素等。

Prevalence of pests and diseases affecting many factors including weather conditions , natural environment , ecological conditions , shows the density and the non-density-dependent factors .

本文研究二维L-V模型的五种特殊情况：1.被捕食种群是密度制约的，而捕食种群为非密度制约的。

This article deals with the following special cases of the two dimentional Lotka-Volterra model : 1 . The prey species is density dependent , and the predator species is density independent .