Increased energy differentially increases richness and abundance of optimal body sizes in deep-sea wood falls
Increased energy differentially increases richness and abundance of optimal body sizes in deep-sea wood falls
复制标题
能量的增加会不同程度地增加深海木材瀑布中最佳身体尺寸的丰富度和丰度
DOI：
10.1002/ecy.2055
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发表时间：
2018
期刊：
影响因子：
4.8
通讯作者：
Webb, Thomas J.
中科院分区：
文献类型：
--
作者：
McClain, Craig R.;Barry, James P.;Webb, Thomas J.
理论和实证研究表明，在自然群落中的总能量影响身体大小以及丰富度和多样性的模式。但是，这些关系背后的确切机制或这三种生态特性如何联系仍然难以捉摸。我们确定了五个假设，涉及社区内的能量可用性，体型分布，丰度和物种丰富度，我们使用实验性深海木材群落来测试它们对描述物种丰富度-体型分布的描述符的预测效果，以及对能量梯度（大小类-丰富度关系）大小类内物种丰富度的趋势。无脊椎动物群落分类鉴定，称重，并从32 Acaciasp计数。尺寸从0.6到20.6公斤不等的原木（对应于不同的可用能量水平），在东北太平洋3，203米处部署了5年和7年。物种丰富度-体型分布和体型-丰富度分布随木材尺寸增加的趋势为增加包装假说提供了支持：物种丰富度随木材尺寸增加而增加，但仅在模态尺寸类别中。此外，个体大小级的物种丰富度反映了该大小级中个体的丰富度。因此，随着能量的增加，模态大小类的丰富度增加，与该大小类内丰度的增加一致。结果表明，随着能源供应的增加，物种丰富度的增加可能与特定的生态位有关，例如，体型等级，特别是在以深海木材福尔斯等离散和能量隔离资源为基础的社区。
Theoretical and empirical studies suggest that the total energy available in natural communities influences body size as well as patterns of abundance and diversity. But the precise mechanisms underlying these relationships or how these three ecological properties relate remain elusive. We identify five hypotheses relating energy availability, body size distributions, abundance, and species richness within communities, and we use experimental deep‐sea wood fall communities to test their predicted effects both on descriptors describing the species‐richness–body‐size distribution, and on trends in species richness within size classes over an energy gradient (size‐class–richness relationships). Invertebrate communities were taxonomically identified, weighed, and counted from 32Acaciasp. logs ranging in size from 0.6 to 20.6 kg (corresponding to different levels of energy available), which were deployed at 3,203 m in the Northeast Pacific Ocean for 5 and 7 yr. Trends in both the species‐richness–body‐size distribution and the size‐class–richness distribution with increasing wood fall size provide support for the Increased Packing hypothesis: species richness increases with increasing wood fall size but only in the modal size class. Furthermore, species richness of body size classes reflected the abundance of individuals in that size class. Thus, increases in richness in the modal size class with increasing energy were concordant with increases in abundance within that size class. The results suggest that increases in species richness occurring as energy availability increases may be isolated to specific niches, e.g., the body size classes, especially in communities developing on discrete and energetically isolated resources such as deep sea wood falls.