Hurlbert Allen H
Ecol Lett. 2006 Mar;9(3):287-94. doi: 10.1111/j.1461-0248.2005.00870.x.
Resource availability is an important constraint on community structure. Some authors have suggested it conceptually links two of the most basic patterns in ecology, the species-area relationship and the latitudinal gradient in species richness. I present the first experimental test of this conjecture, by manipulating both the area and resource concentration of artificial larval drosophilid fly habitats and then allowing colonization from a natural species pool. Both the abundance and species richness of these habitats depended upon the total quantity of resources available, regardless of whether those resources were contained within smaller high-quality habitats or larger poor-quality habitats. While the intercepts of species-area relationships varied with resource concentration, they all collapsed onto the same species-energy curve. These results support the view that energetic constraints are of fundamental importance in structuring ecological communities, and that such constraints may even help explain ecological patterns such as the species-area relationship that do not explicitly address resource availability.
资源可利用性是群落结构的一个重要限制因素。一些作者认为，它在概念上把生态学中两个最基本的模式联系起来，即物种 - 面积关系和物种丰富度的纬度梯度。我通过操纵人工果蝇幼虫栖息地的面积和资源浓度，然后让其自然物种库进行定殖，首次对这一推测进行了实验检验。这些栖息地的丰度和物种丰富度都取决于可用资源的总量，无论这些资源是包含在较小的高质量栖息地还是较大的低质量栖息地中。虽然物种 - 面积关系的截距随资源浓度而变化，但它们都汇聚到同一条物种 - 能量曲线上。这些结果支持了这样一种观点，即能量限制在构建生态群落中至关重要，而且这种限制甚至可能有助于解释诸如物种 - 面积关系等未明确涉及资源可利用性的生态模式。
