Plant and insect diversity along a pollution gradient:: understanding species richness across trophic levels
Plant and insect diversity along a pollution gradient:: understanding species richness across trophic levels
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DOI：
10.1023/a:1011815325503
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发表时间：
2001-01-01
影响因子：
3.4
通讯作者：
Brandl, R
中科院分区：
文献类型：
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作者：
Brändle, M;Amarell, U;Brandl, R
我们分析了德国中部苏格兰松林沿污染梯度的植物和真虫（昆虫，异翅目）的物种丰富度。由于颗粒物的沉积，排放源附近土壤的ph值增加。因此，排放提高了生产率。植物物种丰富度随离排放源距离的减小而增加，从而随生产力的提高而增加。同样，草食性异翅目物种丰富度随离排放源距离的减小而增加，但丰度却随距离的减小而减小。在排放源附近，专门的草食性臭虫种类所占比例最大。因此，食草动物的多样性模式可以用“专业化假说”而不是“消费者稀有性假说”来解释。肉食性异翅目物种丰富度和丰度沿梯度变化趋势不明显。总的来说，我们的数据支持在分析系统中对物种多样性进行“自下而上”的控制。
We analysed species richness of plants and true bugs (Insecta, Heteroptera) along a pollution gradient in Scots pine stands in Central Germany. As a consequence of particulate deposition, pH-values of soils increased in the vicinity of the emission source. Therefore, emission increased productivity. Species richness of plants increased with decreasing distance from emission source, and thus with increasing productivity. Similarly, species richness of herbivorous Heteroptera increased with decreasing distance from emission source, whereas, surprisingly, abundance decreased. The proportion of specialised herbivorous bug species is largest in the vicinity of the emission source. Thus, the diversity pattern of herbivores may be explained by the 'specialisation hypothesis' and not the 'consumer rarity hypothesis'. Species richness and abundance of carnivorous Heteroptera showed no significant trend along the gradient. Overall our data favour the 'bottom-up' control of species diversity in the analysed system.