Spatial coexistence of phytoplankton species in ecological timescale
Spatial coexistence of phytoplankton species in ecological timescale
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DOI：
10.1007/s10144-006-0256-1
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发表时间：
2006-04-01
影响因子：
1.7
通讯作者：
Yoshimura, J
中科院分区：
文献类型：
--
作者：
Miyazaki, T;Tainaka, K;Yoshimura, J
在野生水生系统中，浮游植物的物种多样性通常非常高，正如浮游生物悖论所见。多种竞争性浮游植物共存是自然界中极为常见的现象。然而，实验和数学理论表明，种间竞争往往导致大多数劣等物种的灭绝。在这里，我们提出了一个多物种Lotka-Volterra竞争模型的晶格版本，以证明局部相互作用的重要性。它的数学平衡是除了一个优越物种外，所有物种都被排除在外。然而，在生态时间尺度上，如果相互作用是局部的而不是全局的，那么许多竞争物种的暂时共存是可能的。这意味着，当相互作用是局部的时候，时间尺度会延长许多个数量级。在生态时间尺度上，水生系统中浮游植物的高度物种多样性可以通过空间共存来维持。
The species diversity of phytoplankton is usually very high in wild aquatic systems, as seen in the paradox of plankton. Coexistence of many competitive phytoplankton species is extremely common in nature. However, experiments and mathematical theories show that interspecific competition often leads to the extinction of most inferior species. Here, we present a lattice version of a multi-species Lotka-Volterra competition model to demonstrate the importance of local interaction. Its mathematical equilibrium is the exclusion of all but one superior species. However, temporal coexistence of many competitive species is possible in an ecological time scale if interactions are local instead of global. This implies that the time scale is elongated many orders when interactions are local. Extremely high species diversity of phytoplankton in aquatic systems may be maintained by spatial coexistence in an ecological time scale.