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首页> 外文期刊>Marine biology >Vertical stratification of mobile epiphytal arthropod assemblages between the canopy and understorey of subtidal macroalgae
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Vertical stratification of mobile epiphytal arthropod assemblages between the canopy and understorey of subtidal macroalgae

机译：潮下大型藻类冠层和下层之间活动性phy骨节肢动物组合的垂直分层

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摘要

This study examined patterns of faunal stratification between vertical strata by partitioning subtidal macroalgal communities into vertically contiguous (and hence paired) canopy and understorey habitats. Such floristic strata are often clearly defined in temperate subtidal communities and have been the focus of a range of other, primarily botanical, studies. Previous studies that have touched upon this subject have used statistical tests that require spatially independent samples, yet have collected samples that are often spatially contiguous and therefore not statistically independent. Here an analytical approach for examining faunal stratification in subtidal macroalgal assemblages using split-plot ANOVA for univariate data and a novel multivariate test suitable for analysing assemblage-level paired-sampled data is proposed. Differences in faunal assemblage structure between habitats were primarily attributed to the distribution of two functional feeding groups: filter-feeding and scavenging arthropods. Filter-feeders were more abundant amongst the canopy, whereas scavengers were more abundant in the understorey. No pattern was detected for herbivorous arthropods. These patterns are consistent with the feeding ecology of these functional groups and reflect expected differences in the relative availability of trophic resources between habitats, commensurate with the physical structure of the environments. Contrary to expectation, understorey algal habitats supported faunal assemblages that were as diverse, or more diverse than the canopy habitats, despite comprising smaller habitable spaces (in terms of algal biomass) and generally supporting fewer faunal individuals. Trophic stratification of epifaunal assemblages is suggested as a mechanism whereby faunal diversity is enhanced in these environments.
机译：这项研究通过将潮下带大型藻类群落划分为垂直连续的（因此成对的）冠层和下层生境，研究了垂直地层之间的动物分层模式。这种植物区系通常在温带潮下带社区中得到明确定义，并且已经成为许多其他（主要是植物学）研究的重点。涉及该主题的先前研究已经使用了需要空间独立样本的统计测试，但是收集的样本通常在空间上是连续的，因此在统计上不是独立的。本文提出了一种用于分析潮下大型藻类群中动物群分层的分析方法，该方法使用分裂图方差分析用于单变量数据和适用于分析组合级配对采样数据的新型多元检验。栖息地之间动物组合结构的差异主要归因于两个功能性饲料组的分布：滤食性和节肢性节肢动物。顶棚中的滤食者较多，而下层的食腐动物则较多。食草节肢动物未发现任何模式。这些模式与这些功能组的进食生态学相一致，并反映了生境之间营养资源相对可用性的预期差异，与环境的物理结构相对应。与预期相反，下层藻类栖息地所支持的动物群落与冠层栖息地一样多样或更多样化，尽管其可居住空间较小（就藻类生物量而言），并且通常只支持较少的动物群。建议将附生动物群落的营养分层作为一种在这些环境中增强动物多样性的机制。

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  • 来源
    《Marine biology》 |2007年第3期|p.427-441|共15页
  • 作者

    Alastair J. Hirst;

  • 作者单位

    Tasmanian Aquaculture and Fisheries Institute, University of Tasmania, Private Bag 49, Hobart, Tasmania 7000, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境生物学;
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