Species richness of motile cryptofauna across a gradient of reef framework erosion
Species richness of motile cryptofauna across a gradient of reef framework erosion
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DOI：
10.1007/s00338-012-0886-z
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发表时间：
2012-09-01
期刊：
影响因子：
3.5
通讯作者：
Manzello, D. P.
中科院分区：
文献类型：
--
作者：
Enochs, I. C.;Manzello, D. P.
珊瑚礁生态系统的海洋生物多样性极为集中，可能包括数百万种物种。与热带雨林及其昆虫类似，大多数珊瑚礁动物物种都很小，而且很神秘，生活在结构分类群（树木和珊瑚）的裂缝和裂缝中。虽然隐生物群构成了珊瑚礁后生动物生物多样性的大部分，但我们对它们的基本生态学知之甚少。我们采样运动cryptofaunal社区从活珊瑚和死碳酸盐礁框架在太平洋巴拿马的珊瑚礁上的侵蚀增加的梯度。共鉴定出6个门的289个操作分类单位（OTU）。我们使用的物种积累模型拟合个人和样本为基础的稀疏曲线，以及7个非参数丰富度估计估计物种丰富度之间的不同框架类型。所有的程序预测在不同的框架类型的物种丰富度相同的趋势。估计的物种丰富度在死框架（261-370 OTU）高于活珊瑚基质（112-219 OTU）。令人惊讶的是，丰富度随着框架结构的侵蚀而增加：在珊瑚礁框架具有最大垂直起伏的区域，发现珊瑚碎石包含最多数量的物种（227-320个OTU），估计丰富度最低，为47-115个OTU。这与丰富的活珊瑚表明珊瑚礁多样性顶点的范式相矛盾。
Coral reef ecosystems contain exceptionally high concentrations of marine biodiversity, potentially encompassing millions of species. Similar to tropical rainforests and their insects, the majority of reef animal species are small and cryptic, living in the cracks and crevices of structural taxa (trees and corals). Although the cryptofauna make up the majority of a reef's metazoan biodiversity, we know little about their basic ecology. We sampled motile cryptofaunal communities from both live corals and dead carbonate reef framework across a gradient of increasing erosion on a reef in Pacific Panama. A total of 289 Operational Taxonomic Units (OTUs) from six phyla were identified. We used species-accumulation models fitted to individual- and sample-based rarefaction curves, as well as seven nonparametric richness estimators to estimate species richness among the different framework types. All procedures predicted the same trends in species richness across the differing framework types. Estimated species richness was higher in dead framework (261-370 OTUs) than in live coral substrates (112-219 OTUs). Surprisingly, richness increased as framework structure was eroded: coral rubble contained the greatest number of species (227-320 OTUs) and the lowest estimated richness of 47-115 OTUs was found in the zone where the reef framework had the greatest vertical relief. This contradicts the paradigm that abundant live coral indicates the apex of reef diversity.