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首页> 外文期刊>Estuarine Coastal and Shelf Science >Diet and gut microbiota of two supralittoral amphipods Orchestia montagui and Talitrus saltator living in different microhabitats
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Diet and gut microbiota of two supralittoral amphipods Orchestia montagui and Talitrus saltator living in different microhabitats

机译：生活在不同微生境中的两个腹足类两栖纲Orchestia montagui和Talitrus saltator的饮食和肠道菌群

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摘要

Talitrus saltator (Montagu) and Orchestia montagui Audouin live in different microhabitats of the same supralittoral belt. T. saltator can be found in the damp sand of beaches with scarce or absent wracked material near the water line. 0. montagui is frequently found in the Posidonia banquettes or under wracked material, often in contact with the substrate. This study investigates the effect of diet on species-specific gut microbiota patterns in these talitrid species. Adults were collected and fed with artificial food (commercial fish food and pieces of blotting paper) for 51 days. Gut microbiota were analyzed at five time intervals (0 h, 24 h, 7, 23 and 51 days) by 16S rRNA gene metagenomic analysis and by estimating the relative abundance of cellulases (glycosyl hydrolase gene family 48, GHF48) gene copies. The gut microbiota of 0. montagui was more affected than that of T. saltator by diet shift. Although the taxonomic profile of the gut microbiota varied with time in both species, with an increase of Protobacteria in 0. montagui and of Actinobacteria and Bacteroidetes in T. saltator, genes involved in cellulose degradation (GHF48 family) showed a large-scale increase in 0. montagui but not in T saltator. We conclude that the diet variation has different influence on the composition of gut microbiota in the two talitrid species in accordance with their different alimentary habits: the more generalist T. saltator (detritivore, grazer, and scavenger) showed less changes in its gut microbiota composition than the more specialist 0. montagui (detritivore and grazer), which strongly modified its gut microbiota composition by the captivity diet. (C) 2017 Elsevier Ltd. All rights reserved.
机译：塔利特鲁盐沼（Montagu）和Orchestia montagui Audouin居住在同一sup上带的不同微生境中。在水线附近稀少或缺少包裹物的海滩潮湿沙滩中可找到丁香盐分器。 0. montagui经常出现在Posidonia宴会中或包裹的材料下，通常与基材接触。这项研究调查了饮食对这些速生物种中特定物种肠道微生物群模式的影响。收集成虫并用人造食物（商业鱼类食物和吸水纸片）喂养51天。通过16S rRNA基因宏基因组分析并通过评估纤维素酶（糖基水解酶基因家族48，GHF48）的相对丰度，在五个时间间隔（0小时，24小时，7、23和51天）分析肠道菌群。饮食转移对蒙太奇0的肠道菌群的影响比盐杆菌更重要。尽管两个物种中肠道菌群的分类学特征均随时间而变化，但随着蒙塔吉氏菌中原细菌的增加以及盐沼盐杆菌中放线菌和拟杆菌的增加，参与纤维素降解的基因（GHF48家族）显示出大量增加。 0. montagui，但不在T saltator中。我们得出的结论是，饮食变化对两种滑石粉种类的肠道微生物群组成具有不同的影响，这取决于它们的不同饮食习惯：更具普遍性的T.盐沼（碎屑，掠食性动物和清道夫）显示其肠道微生物群组成的变化较小比更专业的0. montagui（杀虫剂和放牧者）要好得多，后者通过人工饲养饮食极大地改变了肠道菌群的组成。 （C）2017 Elsevier Ltd.保留所有权利。

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