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Early succession of the macroinvertebrate community in a shallow lake: Response to changes in the habitat condition

机译：浅湖中大型无脊椎动物群落的早期演替：对生境条件变化的响应

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摘要

In the present study the initial succession of the aquatic macroinvertebrate communities of a newly created shallow lake in a wetland area was monitored during 15 months. Three different types of macroinvertebrate samples (multihabitat, associated to the Phragmites australis stands and associated to the sediment) were collected monthly from May 2004 to July 2005. Additional samples were collected in the reed stand in 2007, when the reed belt had become much taller and thicker. Colonization of the lake was fast, and the colonization sequence was mainly related to the dispersal abilities of the taxa. Habitat-specific changes in the assemblage's structure and composition were registered. The communities associated to the sediment showed a decrease in overall biomass, density and species richness along time. The density of the gastropod Physella acuta and the chironomid species Dicrotendipes pallidicornis, Polypedilum nubifer and Tanytarsus horni decreased significantly, after Chara stands declined; while the chironomid Chironomus riparius became dominant. The epiphytic macroinvertebrate communities associated with the reed stands followed a seasonal pattern, with a warm-period community dominated by the chironomid species Ablabesmyia monilis and Psectrocladius sordidellus-group, and a cold-period community dominated by the chironomid species Cricotopus ornatus and D. pallidicornis.
机译：在本研究中，在15个月内监测了湿地地区一个新建浅水湖泊的大型水生无脊椎动物群落的初始演替。从2004年5月至2005年7月，每月采集三种不同类型的大型无脊椎动物样本（多栖动物，与芦苇林相关，并与沉积物相关）。2007年，当芦苇带变得更高时，在芦苇林中采集了其他样品。和更厚。湖泊的定居速度很快，定居顺序主要与分类单元的扩散能力有关。记录了组合结构和组成的栖息地特定变化。随着时间的推移，与沉积物相关的群落显示出总体生物量，密度和物种丰富度下降。在Chara林分下降后，腹足纲Physella acuta和chironomid种Dicrotendipes pallidicornis，Polypedilum nubifer和Tanytarsus horni的密度显着下降;而Chironomid riparius成为优势。与芦苇林相关的附生大型无脊椎动物群落遵循季节性模式，其中以猫科物种Ablabesmyia monilis和Psectrocladius sordidellus-group为主的温暖时期群落，以及以猫科动物Cricotopus ornatus和D. pallidicornis为主的冷周期群落。 。

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