Vegetation dynamics and the evolution of Metrosideros polymorpha in Hawaii.
Vegetation dynamics and the evolution of Metrosideros polymorpha in Hawaii.
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夏威夷植被动态和Metrosideros polymorpha 的演化。
DOI：
10.1127/phyto/24/1994/609
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发表时间：
1994
期刊：
影响因子：
1
通讯作者：
D. Mueller‐Dombois
中科院分区：
文献类型：
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作者：
D. Mueller‐Dombois
最常见的夏威夷雨林树种Metrosideros polymorpha通过其广泛的生态幅度展示了生态释放，这反映在其种群之间同样广泛的遗传变异。虽然该物种在夏威夷雨林生物群落中占据了异常广泛的土壤基质，但即使在没有竞争的情况下，其在所有基质上的延续也并非同样成功。所有土壤基质上都发生过反复的种群崩溃，但在排水不良的土壤基质上，记录了空间上更大、更严重的顶枯病。有人认为，这表明对广泛的栖息地部分的不完全适应，并且该物种的适应性辐射涉及生态释放以及随后通过林分水平或大规模枯死而发生的挫折，通常与重新殖民和再生长有关，在这一过程中，更适应的演替种族往往会进化。
The most prevalent endemic Hawaiian rain forest tree,Metrosideros polymorpha, demonstrates ecological release by its wide ecological amplitude, which is reflected in a similarly wide genetic variation among its populations. While the species has occupied an unusually broad spectrum of soil substrates in the Hawaiian rain forest biome, its perpetuation is not equally successful on all substrates, even in the absence of competition. Recurring population crashes have occurred on all soil substrates, but spatially larger and more severe diebacks have been recorded on poorly drained soil substrates. It is suggested that this indicates incomplete adaptation over broad habitat segments, and that adaptive radiation in this species involves ecological release with subsequent setbacks through stand-level or mass dieback, often associated with recolonization and regrowth, a process whereby better adapted successional races tend to evolve.