Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15772 |
Phytoplankton mortality in a changing thermal seascape | |
Kirralee G. Baker; Richard J. Geider | |
2021-07-10 | |
发表期刊 | Global Change Biology
![]() |
出版年 | 2021 |
英文摘要 | Predicting spatiotemporal distributions of phytoplankton biomass and community composition heavily relies on experimental studies that document how environmental conditions influence population growth rates. In unicellular phytoplankton, the net population growth rate is the difference between the cell division rate and the death rate. Along with predation and disease, phytoplankton mortality arises from abiotic stress. Although the effect of temperature on the net population growth rate is well understood, studies examining thermally induced death rates in phytoplankton are scarce. We investigated how cell division and death rates of the diatom Phaeodactylum tricornutum varied within its thermal tolerance limits (thermal niche), and at temperatures just above its upper thermal tolerance limit. We show that death rates were largely independent of temperature when P. tricornutum was grown within its thermal niche, but increased significantly at temperatures that approached or exceeded its upper thermal tolerance limit. Furthermore, the sensitivity of mortality increased with the duration of exposure to heat stress and was affected by the pre-acclimation temperature. Heat waves can be expected to significantly affect phytoplankton mortality episodically. The increasing frequency of heat waves accompanying global warming can be expected to drive changes in phytoplankton community structure due to interspecific variability of thermal niches with potential implications for food web dynamics and biogeochemical cycles. |
领域 | 气候变化 ; 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/333710 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Kirralee G. Baker,Richard J. Geider. Phytoplankton mortality in a changing thermal seascape[J]. Global Change Biology,2021. |
APA | Kirralee G. Baker,&Richard J. Geider.(2021).Phytoplankton mortality in a changing thermal seascape.Global Change Biology. |
MLA | Kirralee G. Baker,et al."Phytoplankton mortality in a changing thermal seascape".Global Change Biology (2021). |
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