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首页> 外文期刊>Estuarine Coastal and Shelf Science >Spatio-temporal structure of the nematode assemblages of the Brouage mudflat (Marennes Oleron, France)
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Spatio-temporal structure of the nematode assemblages of the Brouage mudflat (Marennes Oleron, France)

机译：Brouage滩涂线虫组合的时空结构（法国Marennes Oleron）

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摘要

The density and species composition of the nematode assemblage was investigated in the Brouage mudflat (Marennes-Oleron, France) at three stations over four seasons in relation to environmental parameters (organic matter percentage, chlorophyll a and heavy metal content). From the 43 species recorded, six dominant genera represented 75% of the assemblage. Fluctuations of these species were mainly in response to the observed temporal patterns. Over the course of a year, epigrowth feeders were the most important trophic group (43%) with three dominant species Metachromadoroides remanei, Chromadora macrolaima and Ptycholaimellus jacobi but some non-selective deposit feeders, notably Daptonema oxycerca, also contributed to the utilisation of primary production. The feeding strategies of the dominant species particularly for epistrate feeders are discussed. An assessment of the influence of nematodes grazing on microphytobenthos biomass and production was then performed. Comparison of nematode species grazing rates based on nematode abundance and ingestion rates and microphytobenthic production are discussed. Using the trophic structure of nematode populations to extend those results, grazing rates represent a significant part of microphytobenthic production in springtime.
机译：在四个季节的三个站点中，在布劳格（Brouage）滩涂调查了线虫组合的密度和物种组成，这些参数与环境参数（有机物百分比，叶绿素a和重金属含量）有关。在记录的43个物种中，六个优势属占75％。这些物种的波动主要是响应于观察到的时间模式。在一年的时间里，外生饲养者是最重要的营养种群（43％），其中三个优势种是曼氏嗜铬菌，大型嗜铬菌（Chromadora macrolaima）和Ptycholaimellus jacobi，但一些非选择性沉积饲养者，尤其是Daptonema oxycerca，也促进了初级种群的利用。生产。讨论了主要物种的喂养策略，尤其是epi鱼饲养者。然后评估了线虫对放线虫底栖生物量和产量的影响。讨论了基于线虫丰度和摄入率以及微生底虫生产的线虫种类放牧率的比较。利用线虫种群的营养结构扩展这些结果，放牧率在春季代表了微植物底栖动物生产的重要部分。

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