Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2008370117 |
Heterotrophic eukaryotes show a slow-fast continuum, not a gleaner–exploiter trade-off | |
Thomas Kiørboe; Mridul K. Thomas | |
2020-09-23 | |
发表期刊 | Proceedings of the National Academy of Sciences |
出版年 | 2020 |
英文摘要 | Gleaners and exploiters (opportunists) are organisms adapted to feeding in nutritionally poor and rich environments, respectively. A trade-off between these two strategies—a negative relationship between the rate at which organisms can acquire food and ingest it—is a critical assumption in many ecological models. Here, we evaluate evidence for this trade-off across a wide range of heterotrophic eukaryotes from unicellular nanoflagellates to large mammals belonging to both aquatic and terrestrial realms. Using data on the resource acquisition and ingestion rates in >500 species, we find no evidence of a trade-off across species. Instead, there is a positive relationship between maximum clearance rate and maximum ingestion rate. The positive relationship is not a result of lumping together diverse taxa; it holds within all subgroups of organisms we examined as well. Correcting for differences in body mass weakens but does not reverse the positive relationship, so this is not an artifact of size scaling either. Instead, this positive relationship represents a slow–fast gradient in the “pace of life” that overrides the expected gleaner–exploiter trade-off. Other trade-offs must therefore shape ecological processes, and investigating them may provide deeper insights into coexistence, competitive dynamics, and biodiversity patterns in nature. A plausible target for study is the well-documented trade-off between growth rate and predation avoidance, which can also drive the slow–fast gradient we observe here. |
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/296449 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Thomas Kiørboe,Mridul K. Thomas. Heterotrophic eukaryotes show a slow-fast continuum, not a gleaner–exploiter trade-off[J]. Proceedings of the National Academy of Sciences,2020. |
APA | Thomas Kiørboe,&Mridul K. Thomas.(2020).Heterotrophic eukaryotes show a slow-fast continuum, not a gleaner–exploiter trade-off.Proceedings of the National Academy of Sciences. |
MLA | Thomas Kiørboe,et al."Heterotrophic eukaryotes show a slow-fast continuum, not a gleaner–exploiter trade-off".Proceedings of the National Academy of Sciences (2020). |
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