Experimental evidence for aging food patches as a factor contributing to high deep-sea macrofaunal diversity
Experimental evidence for aging food patches as a factor contributing to high deep-sea macrofaunal diversity
复制标题
老化食物斑块是导致深海大型动物多样性高的一个因素的实验证据
DOI：
10.4319/lo.1996.41.4.0605
复制
发表时间：
1996
影响因子：
4.5
通讯作者：
R. Petrecca
中科院分区：
文献类型：
--
作者：
Paul V. R. Snelgrov;J. Grassle;R. Petrecca
为了确定是否观察到深海大型动物群的演替对小规模斑块的响应，我们在900米深部署了23天和28个月的定居托盘。处理包括未富集或富含马尾藻的沉积物。短期马尾藻托盘的总密度明显高于周围沉积物，而短期未富集托盘的总密度显著低于周围沉积物。这两个马尾藻处理都吸引了高密度的低多样性动物，但它们的物种组成不同。短期、未富集的托盘吸引低密度的高多样性动物，而长期未富集的托盘吸引高密度的中等多样性的动物。所有处理与周围群落的动物亲和力都很低。在一项为期19天的实验中，在原地培养或在消毒的海水中孵化的纳氏链霉菌中，不同的物种占主导地位。因此，23天和28个月的马尾藻托盘之间的差异可能与食物来源的变化有关；不同物种的演替定居在老化的斑块上，表明斑块可能是深海大型动物微型异质性的重要来源。
To determine whether deep-sea macrofaunal succession is observed in response to small-scale patches, we deployed colonization trays at 900-m depth for 23 d and 28 months. Treatments included sediment that was unenriched or enriched with Sargassum natans. Short-term Sargassum trays contained significantly higher and short-term unenriched trays significantly lower total densities than the ambient sediment. Both Sargassum treatments attracted high densities of a low-diversity fauna, but they differed in species composltion. Short-term, unenriched trays attracted low densities of a high-diversity fauna, and long-term unenriched trays attracted high densities of a moderately diverse fauna. All treatments showed low fauna1 affinity with the ambient community. In a 19-d experiment with S. natans incubated in situ or in sterilized seawater, different species dominated. Thus, differences between 23-d and 28-month Sargassum trays may have been related to changes in the food source; a succession of different species colonize aging patches, indicating that patc,h age may be an important source of microheterogeneity for deep-sea macrofauna.