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首页> 外文期刊>Marine ecology progress series >Epifaunal community structure within southern New Zealand kelp forests
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Epifaunal community structure within southern New Zealand kelp forests

机译：新西兰南部海带森林中的表生群落结构

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Epifaunal communities associated with macroalgal forests are a key link in coastal tood webs, yet they are relatively poorly understood in terms of diversity, structure and regional variability. We quantified the biomass, density and richness of epifauna on the 7 most dominant seaweed species from 2 regions of southern New Zealand, i.e. East Otago and Stewart Island. We analysed the epifaunal community structure associated with each macroalgal species and estimated the average biomass of epifauna supported per m(2) of substrate at the shallow (2 m) and deep (10 m) extent of each reef. Significant differences in epifaunal biomass, density and richness were evident between macroalgal species in both regions, and epifaunal community structure differed significantly between regions on 2 of the 4 macroalgal species that were shared. Epifaunal biomass ranged between 5.1 and 186.8 g wet weight m(-2) and corresponded to 0.01 to 0.08% of the macroalgal biomass. Epifaunal biomass and density were not always linked to the morphological complexity of the host macroalgal species, and some of the highest values were found on species considered morphologically simple, such as the fucoid Xiphophora gladiata and laminarian kelp Ecklonia radiata. Greater macroalgal biomass at shallow depths did not always result in greater epifaunal biomass when compared to deeper depths, indicating that macroalgal community structure plays a significant role in controlling epifaunal biomass. Significant regional and host-specific factors likely influence epifaunal communities, and these should be considered when estimating secondary productivity and the effects of habitat change.
机译：与大型藻类森林相关的表生动物群落是沿海蟾蜍网中的关键环节，但就多样性，结构和区域变异性而言，它们的了解相对较少。我们对来自新西兰南部2个地区（即东奥塔哥和斯图尔特岛）的7种最主要的海藻物种的浮游动物的生物量，密度和丰富度进行了量化。我们分析了与每个大型藻类物种相关的表生动物群落结构，并估计了每个礁石的浅（2 m）和深（10 m）范围内每m（2）底物支持的表生动物的平均生物量。在两个区域中，大型藻类物种之间的表观生物量，密度和丰富度存在显着差异，并且在共有的4种大型藻类物种中，有2个区域之间的表观动物群落结构显着不同。表生生物量的范围在5.1至186.8 g湿重m（-2）之间，相当于大藻生物量的0.01至0.08％。粪表藻的生物量和密度并不总是与宿主大型藻类物种的形态复杂性相关，在一些形态简单的物种上发现了一些最高值，例如岩藻岩藻和海带海藻Ecklonia radiata。与较深的深度相比，浅层较大的大型藻类生物量并不总是导致较大的表层生物量，这表明大型藻类群落结构在控制表层生物量中起着重要作用。重要的区域和宿主特定因素可能会影响表生动物群落，在估算次生生产力和生境变化的影响时应考虑这些因素。

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