Beyond biodiversity: individualistic controls of invasion in a self‐assembled community
Beyond biodiversity: individualistic controls of invasion in a self‐assembled community
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超越生物多样性：自组装群落中入侵的个人主义控制
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
S. Pickett
中科院分区：
文献类型：
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作者：
S. J. Meiners;M. Cadenasso;S. Pickett
最近的实验和模拟结果，和竞争为基础的生态理论，预测物种丰富度和小空间尺度的社区入侵之间的简单关系-入侵的可能性随着丰富度的增加而减少。在这里，我们显示的数据，连续42年的采样老领域的演替，揭示了相当不同的植物入侵的动态。与实验研究相反，当丰富度在解释入侵概率方面很重要时，它通常与物种入侵呈正相关。几个物种的入侵有一个单峰响应居民物种丰富度，这似乎是一个混合物的成分的影响和丰富的效果。有趣的是，本地物种和外来物种的入侵并没有根本的不同。在这个系统中，物种入侵的控制是个人主义的，由各种社区水平的机制，而不是一个单一的盛行丰富度效应。
Recent experimental and simulation results, and competition-based ecological theory, predict a simple relationship between species richness and the invasibility of communities at small spatial scales – likelihood of invasion decreases with increasing richness. Here we show data from 42 continuous years of sampling old field succession that reveal quite different dynamics of plant invasion. Contrary to experimental studies, when richness was important in explaining invasion probability, it was typically positively associated with species invasion. Invasion of several species had a unimodal response to resident species richness, which appeared to be a mixture of compositional influences and a richness effect. Interestingly, invasions by native and exotic species did not fundamentally differ. Control of species invasion in this system is individualistic, caused by a variety of community-level mechanisms rather than a single prevailing richness effect.