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首页> 外文期刊>Oceanology >Colonization of Azoic Sediments of Different Grain-Size Composition by Littoral Harpacticoida:Copepoda
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Colonization of Azoic Sediments of Different Grain-Size Composition by Littoral Harpacticoida:Copepoda

机译：沿海垂线类：Co足类对不同粒度组成的偶氮沉积物的定殖

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Colonization of isolated plots (open bottomless plastic containers) with sterile sands of different grain size by littoral harpacticoids was studied.The colonization begins very rapidly with the appearance of harpacticoids in these containers after several hours of the experiment.Epibenthic and swimming forms (Het-erolaophonte minuta,H.littoralis,Platychelipus littoralis,Stenhelia palustris,Halectinosoma curticome) were the most active colonizers settling primarily through the near-bottom waters at high tides.Burrowing species such as Paraleptastacus kliei and Huntemannia jadensis colonized the substrate substantially slower,mostly crawling through the sediments.Some differences are observed between the species in their colonization of different sediments according to their natural preferences.Most readily,harpacticoids colonized the finegrained sand close in grain-size composition to the reference one.The period of intense colonization lasted approximately one week.At this stage,some species that were rare or lacking in the reference community,were relatively abundant in the experimental containers.Thus,the total colonizing pool of the species,a potential source of harpacticoid diversity,is broader as compared with that characteristic of the actual local community.This highly mobile pool provides fast and permanent settling on any free space.After three-four weeks,both the species composition and the abundance of all the experimental communities approached these parameters in the reference one and an equilibrium state was established.The results indicate that only the initial stage of meiofaunal colonization is affected by the sediment grain size and species motility;then,other factors become more important,which smoothes the differences between the experimental and surrounding communities.It is suggested that this two-stage colonization scenario is a general feature of most of the micro- and meiobenthic communities.
机译：研究了沿岸类类拟南芥定殖在具有不同粒度的无菌沙子的孤立地块（无底敞开的塑料容器）中。实验数小时后，在这些容器中出现类类拟南芥，因此定殖开始非常迅速。 erolaophonte minuta，H.littoralis，Platychelipus littoralis，Stenhelia palustris，Halectinosoma curticome）是最活跃的定居者，主要在高潮时通过近底部水域定居。诸如Paraleptastacus kliei和Huntemannia jadensis的爬行物种在基质上最慢地爬行。根据自然偏好，物种在不同沉积物的定殖过程中会观察到一些差异。类胡萝卜素很容易定居在粒度组成接近于参考颗粒的细粒沙上。强烈定殖时期持续了大约一个周。在这个阶段，一些在参考容器中稀有或缺乏的物种，在实验容器中相对丰富。因此，该物种的总定殖池是潜在的类类拟生物多样性的来源，与实际的本地社区相比，具有更广泛的适应性。高度移动的池提供了对任何自由空间的快速和永久性沉降。三到四周后，所有实验群落的物种组成和丰度都在参考值中达到了这些参数，并且建立了平衡状态。结果表明，只有半月板定植的初期受沉积物粒度和物种运动性的影响;然后，其他因素变得更为重要，这使实验群落与周围群落之间的差异趋于平滑。这表明这种两阶段定殖的情况是一个普遍特征。大多数微型和中底栖动物群落。

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