植物浮游植物相关微生物组中的生物多样性调节宿主生理学,宿主社区生态学和营养循环
Jonathan R Dickey1, Nikki M Mercer1, Mirte C M Kuijpers1
1Department of Ecology, Behavior and Evolution, University of California San Diego School of Biological Sciences, La Jolla, California, USA.
mSystems
|January 28, 2025
概括
植物浮游生物微生物群中的微生物多样性下降会损害宿主细胞,但会促进植物浮游生物群落. 这些影响被环境压力因素 (如变暖和营养变化) 放大.
科学领域:
- 微生物生态学 微生物生态学
- 细胞宿主-微生物群相互作用
- 生态系统功能 生态系统功能
背景情况:
- 生物多样性在全球范围内正在下降,这影响了 prokaryotes 和它们在宿主生理和生态中的作用.
- 与宿主相关的微生物组越来越被认为是真核宿主健康和生态系统过程的关键调节者.
- 人类活动正在推动微生物多样性的下降,以及气候变暖和营养物质可用性的改变等环境压力因素.
研究的目的:
- 研究微生物群多样性下降对浮游植物及其相关环境微生物群的独立和互动影响.
- 测试如何减少微生物群多样性,单独和压力因素 (升高的温度,改变的营养素),影响宿主生理学,社区动态和生态系统营养循环.
- 了解微生物多样性下降在全球变化和人类影响的背景下所带来的影响.
主要方法:
- 利用植物浮游生物及其相关的环境微生物群作为模型系统.
- 进行了一项多因素操纵实验,以改变微生物群的多样性.
- 引入的压力因素,包括温度升高和营养物质可用性变化,以评估相互作用影响.
主要成果:
- 低微生物群多样性导致宿主细胞应激增加,由升高的 δ13C 和 δ15N 表示,并影响宿主细胞形态.
- 尽管宿主压力增加,但微生物群多样性减少导致植物浮游生物群多样性和生物量增加.
- 微生物群的多样性下降导致环境中溶解的和总量的减少,在营养物质稀缺的条件下和高温下,效应会放大.
结论:
- 与宿主相关的微生物多样性下降具有广泛的影响,影响宿主细胞生理学,社区生态学和生态系统营养循环.
- 微生物群多样性丧失的影响在环境压力因素 (如营养物质耗尽和温度升高) 下得到放大.
- 这些发现强调了微生物多样性在生态系统稳定中的关键作用,以及生物多样性丧失和全球变化的协同影响的潜力.
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