不同的机制塑造了不同土地使用强化过程中的 prokaryotic 社区集会
Yuxin Hu1, Jing Zhang1, Yingcai Wang1
1Yangtze River Basin Ecological Environment Monitoring and Scientific Research Center, Yangtze River Basin Ecological Environment Supervision and Administration Bureau, Ministry of Ecology and Environment, Wuhan 430010, Hubei, China.
Water research
|September 14, 2023
概括
土地使用强度会影响河流水质和 prokaryotic 社区. 高强度有利于环境过 (利基理论),而低强度支持中性理论和长江流域的距离衰变模式.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 微生物学 微生物学
背景情况:
- 土地使用强度显著影响河流生态系统,影响水质和微生物社区结构.
- 了解 prokaryotic 社区组装机制对于有效的河流流域管理至关重要.
- 中立和利基理论在不同土地使用强度下对 prokaryotic 社区组装的相对贡献仍然不清楚.
研究的目的:
- 调查不同土地使用强度对长江流域河水质和 prokaryotic 社区聚集的影响.
- 确定中立理论和利基理论在 prokaryotic 社区组装中的作用,跨越土地使用强度的梯度.
- 阐明在不同的人类压力下驱动 prokaryotic 社区形成的生态过程.
主要方法:
- 在长江流域建立了251个采样地点,以代表不同的土地使用强度.
- 在每个地点分析了水质参数和原生生物群体组成.
- 应用了生态理论 (中立和利基理论) 并确定了五个关键的生态过程 (均选择,均分散,非主导过程,分散限制,变量选择) 来解释社区集会.
主要成果:
- 土地使用强度的增加与景观模式的破坏相关,导致水质恶化.
- 较高的土地利用强度加强了同质选择,导致盆地规模的原生物社区同质化.
- 低土地使用强度显示出距离衰退模式,中立理论主导社区集会.
- 高土地使用强度将组装转向利基理论,由于水生环境退化,环境过变得越来越有影响力.
结论:
- 土地使用强度是河流 prokaryotic 社区组装的关键驱动因素,改变中立和利基过程之间的平衡.
- 长江流域有效的土地利用管理需要考虑其对水生生态系统和微生物群落的影响.
- 研究结果提供了关于 prokaryotic 社区动态的见解,有助于制定管理土地利用和保护河流生物多样性的战略.
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