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首页> 外文期刊>Marine biology >Colonization and early succession on artificial hard substrata by meiofauna
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Colonization and early succession on artificial hard substrata by meiofauna

机译：meiofauna在人工硬质基质上的定殖和早期演替

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An experiment was undertaken at Farol Island, Brazil, to examine colonization of bare aluminium surfaces by microbes and meiofauna. It was hypothesized that a primary source of meiofaunal colonists was sediment resuspended during upwelling events, two of which occurred during the experiment. Microbial bio-films formed on the experimental substrata within 1 day, and continued to develop throughout the experimental period. Among meiofaunal groups copepods also appeared on the first day, and nematodes on the second. Meiofaunal community structure developed in three main phases: an initial phase of 2 days, characterized by low abundances of copepods; a second phase during the first upwelling period characterized by higher abundances of copepods and also by turbellarians; and a third phase from day 13 onwards characterized by relatively stable abundances of a range of taxa including copepods, cirripedes, nematodes and ostracods. Nema-tode assemblages also developed in three phases, but with different timings coinciding with upwelling events: an initial phase, from the beginning of the experiment to day 9, characterized by few species and low (or no) abundances; a second phase following the first upwelling characterized by moderate abundances of Chromadori-na, Chromadorella, Daptonema and Euchromadora sp. 3; a third phase following the second upwelling period (from day 26 onwards) in which Daptonema disappeared and the assemblage was characterized by moderate to high abundances of Euchromadora (species 1 and 2) and Chromadorella. Although shifts in nematode assemblage structure coincided with upwelling events no evidence was found for sediments being the primary source of colonizers on the aluminium substrata, in contrast to our hypothesis.
机译：在巴西的法罗尔岛进行了一项实验，以研究微生物和介壳动物对铝裸露表面的定殖。据推测，系膜动植物定居者的主要来源是在上升流事件中重悬了沉积物，其中两个在实验期间发生。微生物生物膜在1天内形成于实验基质上，并在整个实验期间持续发展。在角膜类群中，co足类也出现在第一天，而线虫则出现在第二天。牛足类群落结构主要分为三个阶段：初始阶段为期2天，其特征是pe足类动物数量少；在第一个上升阶段的第二阶段，其特征是pe足类动物的数量较多，而且还有动荡者；从第13天开始的第三阶段，其特征是包括co足类，卷足类，线虫和类成虫在内的一系列类群的相对稳定的丰度。 Nema-tode组合也发展为三个阶段，但时序与上升事件相吻合：从实验开始到第9天的初始阶段，其物种很少，丰度低（或没有）。第一次上升之后的第二阶段，其特征是Chromadori-na，Chromadorella，Daptonema和Euchromadora sp具有中等丰度。 3;在第二个上升期之后的第三阶段（从第26天起），Daptonema消失了，并且该组合的特征是中度至高丰度的Euchromadora（物种1和2）和Chromadorella。与我们的假设相反，尽管线虫组合结构的变化与上升事件同时发生，但没有证据表明沉积物是铝基底上定居者的主要来源。

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