Fusing spatial resource heterogeneity with a competition–colonization trade-off in model communities
Fusing spatial resource heterogeneity with a competition–colonization trade-off in model communities
复制标题
将空间资源异质性与模型社区中的竞争-殖民权衡相融合
DOI：
10.1007/s12080-007-0005-x
复制
发表时间：
2008
影响因子：
1.6
通讯作者：
K. Gross
中科院分区：
文献类型：
--
作者：
K. Gross
斑块环境中多物种共存的两种常见机制是由资源变化引起的竞争能力的空间异质性和竞争-殖民化权衡。本文提出并分析了一个将这些机制融合在一起的模型。该模型表明，资源比例的空间变化可以导致多物种共存，但当物种竞争的资源数量较少时，这种机制本身就很弱。然而，当空间资源异质性与竞争-殖民化权衡协同作用时，它是多物种共存的有力机制。该模型还显示了资源供应如何控制弱竞争对手/优势殖民者和强竞争对手/劣势殖民者之间的竞争平衡。这为经验观察到的物种多样性与生态生产力之间驼峰关系的可能解释提供了额外的理论支持。
Two commonly cited mechanisms of multispecies coexistence in patchy environments are spatial heterogeneity in competitive abilities caused by variation in resources and a competition–colonization trade-off. In this paper, a model that fuses these mechanisms together is presented and analyzed. The model suggests that spatial variation in resource ratios can lead to multispecies coexistence, but this mechanism by itself is weak when the number of resources for which species compete is small. However, spatial resource heterogeneity is a powerful mechanism for multispecies coexistence when it acts synergistically with a competition–colonization trade-off. The model also shows how resource supply can control the competitive balance between species that are weak competitors but superior colonizers and strong competitors/inferior colonizers. This provides additional theoretical support for a possible explanation of empirically observed hump-shaped relationships between species diversity and ecological productivity.