Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2012443117 |
Constrained optimal foraging by marine bacterioplankton on particulate organic matter | |
Yutaka Yawata; Francesco Carrara; Filippo Menolascina; Roman Stocker | |
2020-09-24 | |
发表期刊 | Proceedings of the National Academy of Sciences
![]() |
出版年 | 2020 |
英文摘要 | Optimal foraging theory provides a framework to understand how organisms balance the benefits of harvesting resources within a patch with the sum of the metabolic, predation, and missed opportunity costs of foraging. Here, we show that, after accounting for the limited environmental information available to microorganisms, optimal foraging theory and, in particular, patch use theory also applies to the behavior of marine bacteria in particle seascapes. Combining modeling and experiments, we find that the marine bacterium Vibrio ordalii optimizes nutrient uptake by rapidly switching between attached and planktonic lifestyles, departing particles when their nutrient concentration is more than hundredfold higher than background. In accordance with predictions from patch use theory, single-cell tracking reveals that bacteria spend less time on nutrient-poor particles and on particles within environments that are rich or in which the travel time between particles is smaller, indicating that bacteria tune the nutrient concentration at detachment to increase their fitness. A mathematical model shows that the observed behavioral switching between exploitation and dispersal is consistent with foraging optimality under limited information, namely, the ability to assess the harvest rate of nutrients leaking from particles by molecular diffusion. This work demonstrates how fundamental principles in behavioral ecology traditionally applied to animals can hold right down to the scale of microorganisms and highlights the exquisite adaptations of marine bacterial foraging. The present study thus provides a blueprint for a mechanistic understanding of bacterial uptake of dissolved organic matter and bacterial production in the ocean—processes that are fundamental to the global carbon cycle. |
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/296447 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Yutaka Yawata,Francesco Carrara,Filippo Menolascina,et al. Constrained optimal foraging by marine bacterioplankton on particulate organic matter[J]. Proceedings of the National Academy of Sciences,2020. |
APA | Yutaka Yawata,Francesco Carrara,Filippo Menolascina,&Roman Stocker.(2020).Constrained optimal foraging by marine bacterioplankton on particulate organic matter.Proceedings of the National Academy of Sciences. |
MLA | Yutaka Yawata,et al."Constrained optimal foraging by marine bacterioplankton on particulate organic matter".Proceedings of the National Academy of Sciences (2020). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论