跨物种相互作用决定了微生物群落中生物聚合物降解种群的生长动态
Glen D'Souza1,2, Julia Schwartzman3, Johannes Keegstra4
1Microbial Systems Ecology Group, Department of Environmental Systems Sciences, Institute of Biogeochemistry and Pollutant Dynamics, ETH-Zurich, Zurich 8006, Switzerland.
概括
海洋微生物分解生物聚合物受到其他社区成员的影响. 非降解的细胞,称为交叉养器,改变了降解细胞的生长和酶的产生,影响了碳重矿化.
科学领域:
- 微生物生态学 微生物生态学
- 生物地质化学生物地质化学
- 海洋微生物学 海洋微生物学
背景情况:
- 微生物群落对于生态系统中有机碳生物聚合物的再矿化至关重要.
- 生物聚合物矿化始于降解剂释放营养物质,推动开发者和食尸动物的生长.
- 这些社区的微观组合和动态,特别是工会之间的互动,仍然不太了解.
研究的目的:
- 研究生态相互作用如何影响海洋微生物群落的生长和空间分布.
- 了解非降解的社区成员 (交叉养者) 对生物聚合物降解群体的影响.
- 量化利用者和食尸动物对酸盐降解海洋微生物功能的影响.
主要方法:
- 利用批量生长试验来研究微生物社区动态.
- 采用微流体学与时隔显微镜相结合,用于高分辨率观察单细胞行为的行为.
- 定量分析了海洋微生物群落降解酸盐的生长速度和空间分布模式.
主要成果:
- 开发者和食尸动物 (交叉养者) 的存在显著改变了生物聚合物降解细胞的空间分布.
- 交叉养剂通常导致降解细胞生长率的降低.
- 与交叉养者共存改变了对聚合物分解负责的降解细胞的细胞外酶的产生.
结论:
- 与非降解的社区成员的生态相互作用对微生物社区在碳生物聚合物重矿化中的功能作用产生了深刻的影响.
- 交叉料活动影响生物聚合物降解剂在微观尺度上的生长和酶活性.
- 了解这些微观相互作用对于预测海洋碳循环的动态和功能至关重要.
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