Food plants, species composition and variability of the moth community in undisturbed forest
Food plants, species composition and variability of the moth community in undisturbed forest
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DOI：
10.2307/3546774
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发表时间：
1998-04-01
期刊：
影响因子：
3.4
通讯作者：
Jaros, J
中科院分区：
文献类型：
--
作者：
Leps, J;Spitzer, K;Jaros, J
本研究是基于14年的时间序列的光陷阱数据的蛾类（鳞翅目）物种在一个不受干扰的桤木沼泽森林在中欧。在五个永久样地上跟踪植被变化，测定光阱周围森林部分中所有植物物种的生物量。由于所有蛾类的取食特异性是已知的，我们不仅能够根据其潜在的取食特异性对蛾类进行分类，而且还能够估计所研究的生态系统中的总食物供应及其多样性。在单食性物种，蛾种群大小，其特点是平均年渔获量，与食物供应呈正相关。而在寡食性和多食性物种中，相关性接近于零。虽然植物物种支持单食性蛾的能力与其生物量呈正相关，但有一些相对罕见的植物物种支持单食性蛾，一些常见的物种也不支持单食性蛾。方向的变化，发现在植物和蛾类，蛾类的方向变化比植物覆盖的变化更明显。没有证据表明蛾类种群大小的方向性变化是由食物供应的变化引起的。明显的方向性变化，主要是在物种不局限于封闭的桤木森林，并在更广泛的地区的变化，在某些情况下，已知的物种分布的变化。非定向Sear-to-Sear变异性，描述劳埃德指数，是最好的解释的潜在人口增长晚的蛾类物种的基础上估计的物种繁殖力。劳埃德指数与食物植物种类数呈显著正相关，但相关系数较低（r = 0.25）：取食特异性类别之间无显著差异。这表明，种群变异性对物种摄食特异性的依赖性，无论是潜在的还是以生态系统中食用植物的数量表示的，都很弱。
The present study is based on a 14-yr time series of light trap data of moths (Lepidoptera) species in an undisturbed alder swamp forest in Central Europe. Vegetation change was followed on five permanent plots, The biomass of all plant species in the portion of the forest surrounding the light trap was determined. As the feeding specificity of all the moth species was known, we were not only able to categorize moth species according to their potential feeding specificity, but were also able to estimate total food supply and its diversity in the studied ecosystem. In monophagous species, moth population size, characterized by mean annual catch, was positively correlated with food supply. whereas in oligo-and polyphagous species the correlation was close to zero. Although the ability of plant species to support a monophagous moth is positively dependent on its biomass, there are some relatively rare plant species supporting monophagous moths, and some common species nor supporting monophagous moths. Directional changes were found both in plant and moth species; directional changes in moth species are more pronounced than changes in plant cover. There is no evidence suggesting that directional changes in moth population sizes are caused by the changes in food supply. Pronounced directional changes were found mainly in species not confined to the closed alder forest and are related to changes in wider areas, in some cases with known changes in species distribution. Non-directional Sear-to-Sear variability, described by Lloyd's index, is best explained by the potential population growth late of a moth species estimated on the basis of species fecundity. Correlation of Lloyds index with number of food plant species is significantly positive, but low (r = 0.25): no significant differences were found between categories of feeding specificity. This shows that the dependence of population variability on species feeding specificity, both potential and expressed as number of food plants in the ecosystem, is weak.