Orians Colin M, Fritz Robert S
Department of Biology, Tufts University, 02155, Medford, MA, USA.
Department of Biology, Vassar College, 12601, Poughkeepsie, NY, USA.
Oecologia. 1996 Feb;105(3):388-396. doi: 10.1007/BF00328742.
The effects of soil-nutrient environment, plant genotype, and the interaction between the two on the resistance of the willow, Salix sericea, to insect species in a diverse herbivore community was measured. We found that soil-nutrient environment influenced plant growth and the abundance of most herbivores of S. sericea. However, environmental effects on herbivore abundance were often modified by plant genetics; the abundance of four of seven herbivores exhibited significant genotypeby-environment interaction effects. Pure genotype effects were mostly small and non-significant. The effects of fertilization differed among herbivores. Several herbivores were more abundant on fertilized plants, one was less abundant, and the abundance of others did not change. We found that feeding guild was a poor predictor of herbivore response. Finally we found significant phenotypic and genetic correlations among growth rate, internode length, and the abundances of several herbivores.
我们测定了土壤养分环境、植物基因型以及二者之间的相互作用对绢柳（Salix sericea）抵抗多种食草动物群落中昆虫物种能力的影响。我们发现，土壤养分环境影响了绢柳的植物生长以及大多数食草动物的数量。然而，环境对食草动物数量的影响常常因植物基因型而改变；七种食草动物中有四种的数量表现出显著的基因型与环境的交互作用效应。纯基因型效应大多较小且不显著。施肥对不同食草动物的影响存在差异。几种食草动物在施肥后的植物上数量更多，一种数量更少，而其他食草动物的数量没有变化。我们发现，取食类群并不能很好地预测食草动物的反应。最后，我们发现生长速率、节间长度以及几种食草动物的数量之间存在显著的表型和遗传相关性。
