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首页> 外文期刊>Ecological research >Succession in a stream invertebrate community: A transition in species dominance through colonization
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Succession in a stream invertebrate community: A transition in species dominance through colonization

机译：河流无脊椎动物群落中的演替：通过殖民化转变物种优势地位

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A field experiment was conducted using ceramic plates as experimental substrates to describe the colonizing pattern of a stream invertebrate community after disturbance, and to ascertain the importance of colonizing ability for succession in a Japanese stream. We employed the simultaneous removal design in which plates were periodically set in place (1, 2, 4, 8, 16 and 32 days before sampling) and all plates were sampled on the last day of the experiment, to diminish the influence of seasonal change in stream invertebrates. Total abundance and taxon richness reached a plateau after 4-16 days of colonization. In contrast, the relative abundance of six common taxa and community structure changed throughout the 32 days of colonization. Differences in the colonizing ability of the stream invertebrates were evident. Taxa with high mobility, such as the mayflies Baetis thermicus, Paraleptophlebia japonica, Cinygmula sp. and Drunella sachalinensis, colonized faster than those with low mobility (e.g. the caddisfly species Brachycentrus americanus and the chironomid midge Diame-sinae spp.). The abundance of the most common taxon, Baetis, decreased at late stages of colonization, possibly because of low periphyton biomass. Consequently, we concluded that a difference in colonization ability among taxa is an important factor causing succession in stream invertebrate communities in local habitats.
机译：使用陶瓷板作为实验基质进行了野外实验，以描述扰动后溪流无脊椎动物群落的定殖模式，并确定在日本溪流中定殖能力对继承的重要性。我们采用了同时移除设计，在该设计中，将板块定期放置到位（采样前1、2、4、8、16和32天），并在实验的最后一天对所有板块进行采样，以减少季节性变化的影响在无脊椎动物中。定殖4-16天后，总丰度和分类单元丰富度达到了一个平台。相反，在定居的32天中，六个常见分类单元和群落结构的相对丰度发生了变化。溪流无脊椎动物定殖能力的差异是明显的。流动性较高的类群，例如the类的Baetis thermicus，Paraleptophlebia japonica，Cinygmula sp。和沙棘藻（Drunella sachalinensis）的移殖速度要快于低迁移率的沙棘（例如鳞翅目美洲短臂猿和and蚊Diame-sinae spp。）。最常见的分类单元Baetis的丰度在定殖后期下降，这可能是由于周围植物的生物量低所致。因此，我们得出的结论是，分类单元之间的定殖能力差异是引起当地生境中无脊椎动物群落演替的重要因素。

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