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首页> 外文期刊>Ecology letters >Individuals' diet diversity influences gut microbial diversity in two freshwater fish (threespine stickleback and Eurasian perch)
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Individuals' diet diversity influences gut microbial diversity in two freshwater fish (threespine stickleback and Eurasian perch)

机译：个体的饮食多样性会影响两条淡水鱼（threespine棘背鱼和欧亚鲈鱼）的肠道微生物多样性

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摘要

Vertebrates' diets profoundly influence the composition of symbiotic gut microbial communities. Studies documenting diet-microbiota associations typically focus on univariate or categorical diet variables. However, in nature individuals often consume diverse combinations of foods. If diet components act independently, each providing distinct microbial colonists or nutrients, we expect a positive relationship between diet diversity and microbial diversity. We tested this prediction within each of two fish species (stickleback and perch), in which individuals vary in their propensity to eat littoral or pelagic invertebrates or mixtures of both prey. Unexpectedly, in most cases individuals with more generalised diets had less diverse microbiota than dietary specialists, in both natural and laboratory populations. This negative association between diet diversity and microbial diversity was small but significant, and most apparent after accounting for complex interactions between sex, size and diet. Our results suggest that multiple diet components can interact nonadditively to influence gut microbial diversity.
机译：脊椎动物的饮食深刻影响着共生肠道微生物群落的组成。记录饮食-微生物群落相关性的研究通常集中在单变量或分类饮食变量上。但是，在自然界中，个人经常食用多种食物。如果饮食成分独立发挥作用，每个成分都提供独特的微生物菌落或营养，则我们期望饮食多样性与微生物多样性之间存在正相关关系。我们在两种鱼类（stick背和鲈鱼）的每一种中测试了这种预测，其中个体食用沿海或上层无脊椎动物或两种猎物的混合物的倾向不同。出乎意料的是，在大多数情况下，自然和实验室人群中，饮食更普遍的个体比饮食专家的微生物群多样性要少。饮食多样性和微生物多样性之间的这种负相关关系很小但很明显，并且在考虑了性别，大小和饮食之间的复杂相互作用后最明显。我们的结果表明，多种饮食成分可以通过非加性相互作用来影响肠道微生物多样性。

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