A long-term study of competition and diversity of corals
A long-term study of competition and diversity of corals
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DOI：
10.1890/02-4043
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发表时间：
2004-05-01
影响因子：
6.1
通讯作者：
Kerr, AM
中科院分区：
文献类型：
--
作者：
Connell, JH;Hughes, TE;Kerr, AM
研究了1962 ~ 2000年澳大利亚大堡礁赫伦岛不同地点珊瑚种间竞争、丰度及α和β多样性的变化。丰度和多样性的减少是由风暴的直接破坏和竞争中的淘汰造成的；减少后的恢复受到差异的影响。在尺寸上。物种池的新兵，并在不同的竞争过程中在不同的环境。在一些地方，珊瑚幼虫招募的物种池非常低，因此物种丰富度(S)和多样性(D)从未上升得很高。在其他地方，这个物种的新成员数量更大，S和D很快就会上升到很高的水平。在38年期间，五次不同的飓风摧毁了一些地点的珊瑚，S和D的恢复时间从3年到25年不等。恢复时间不同的一个原因是，在飓风期间，物理环境有时发生了巨大的变化，需要很长一段时间才能恢复到适合珊瑚的栖息地。一旦S和D在再殖民化过程中达到顶峰，它们要么保持在较高水平，要么下降。在浅水中，没有环境条件的有害变化，S和D可能不会随着时间的推移而下降，因为在低潮时，优秀的竞争者不可能在不暴露于有害的空中暴露的情况下超过劣势的竞争者。在其他时间和地点，S和D确实随着时间的推移而下降。其中一个原因是自然环境的逐渐恶化，因为珊瑚向上生长到潮间带区域，并因暴露而死亡。S和D也下降了，因为飓风的波浪作用要么全部或部分杀死了珊瑚群，要么改变了珊瑚礁顶部的排水模式，使珊瑚在退潮时又高又干。在较深的地点，S和D的下降有时是由大浪作用或种间竞争引起的，因为一些珊瑚过度生长或超过了它们的邻居并消灭了它们。
Variations in interspecific competition, abundance, and alpha and beta diversities of corals were studied from 1962 to 2000 at different localities on the reef at Heron Island, Great Barrier Reef, Australia. Reductions in abundance and diversity were caused by direct damage by storms and elimination in competition: Recovery, after such reductions was influenced by differences. in the size of the. species pools of recruits, and in contrasting competitive processes in different environments. In some places, the species pool-of coral larval recruits is very low, so species richness (S) and diversity (D) never rise very high. At other sites, this species pool of recruits is larger, and S and D soon rise to high levels. After five different hurricanes destroyed corals at some sites during the 38-year period, recovery times of S and D ranged from 3 to 25 years. One reason for the variety of recovery times is that the physical environment was sometimes so drastically changed during the hurricane that a long period was required to return it to a habitat suitable for corals. Once S and D have peaked during recolonization, they may either remain at a high level, or decline. In shallow water, with no deleterious changes in environmental conditions, S and D may not decline over time, because superior competitors cannot overtop inferior competitors without exposing themselves to deleterious aerial exposure at low tide. At other times and places, S and D did decline over time. One cause of this was a gradual deterioration of the physical environment, as corals grew upward into the intertidal region and died of exposure. S and D also fell because the wave action in hurricanes either killed colonies in whole or part, or changed the drainage patterns over the reef crest, leaving corals high and dry at low tide. At deeper sites, declines in S and D were sometimes caused by heavy wave action, or by interspecific competition, as some corals overgrew or overtopped their neighbors and eliminated them.