Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/ele.13948 |
Dietary abundance distributions: Dominance and diversity in vertebrate diets | |
Matthew C. Hutchinson; Andrew P. Dobson; Robert M. Pringle | |
2021-12-30 | |
发表期刊 | Ecology Letters |
出版年 | 2021 |
英文摘要 | Diet composition is among the most important yet least understood dimensions of animal ecology. Inspired by the study of species abundance distributions (SADs), we tested for generalities in the structure of vertebrate diets by characterising them as dietary abundance distributions (DADs). We compiled data on 1167 population-level diets, representing >500 species from six vertebrate classes, spanning all continents and oceans. DADs near-universally (92.5%) followed a hollow-curve shape, with scant support for other plausible rank-abundance-distribution shapes. This strong generality is inherently related to, yet incompletely explained by, the SADs of available food taxa. By quantifying dietary generalisation as the half-saturation point of the cumulative distribution of dietary abundance (sp50, minimum number of foods required to account for 50% of diet), we found that vertebrate populations are surprisingly specialised: in most populations, fewer than three foods accounted for at least half the diet. Variation in sp50 was strongly associated with consumer type, with carnivores being more specialised than herbivores or omnivores. Other methodological (sampling method and effort, taxonomic resolution), biological (body mass, frugivory) and biogeographic (latitude) factors influenced sp50 to varying degrees. Future challenges include identifying the mechanisms underpinning the hollow-curve DAD, its generality beyond vertebrates, and the biological determinants of dietary generalisation. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/345147 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Matthew C. Hutchinson,Andrew P. Dobson,Robert M. Pringle. Dietary abundance distributions: Dominance and diversity in vertebrate diets[J]. Ecology Letters,2021. |
APA | Matthew C. Hutchinson,Andrew P. Dobson,&Robert M. Pringle.(2021).Dietary abundance distributions: Dominance and diversity in vertebrate diets.Ecology Letters. |
MLA | Matthew C. Hutchinson,et al."Dietary abundance distributions: Dominance and diversity in vertebrate diets".Ecology Letters (2021). |
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