Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
WasserCluster Lunz (WCL), Inter-university Research Institute, Lunz am See, Austria.
Environ Sci Pollut Res Int. 2020 Apr;27(12):13166-13179. doi: 10.1007/s11356-020-07921-2. Epub 2020 Feb 3.
Biotic interactions shape the community structure and function of ecosystems and thus play an important role in ecosystem management and restoration. To investigate how water temperature (related to the season) and water depth (related to spatial patterns of river morphology) affect macrophyte-bacterioplankton interactions in a groundwater-fed river, we conducted the structural equation modeling on datasets grouped by hydrological conditions. In addition to direct effects on macrophyte growth and/or bacterioplankton development, water temperature and water depth could both regulate the role of different nutrients (inorganic and organic) on affecting these biological indicators. Deeper water depth intensified the positive relationship between macrophytes and bacterioplankton, while higher temperature switched the relationship from being positive to negative. Our study provides empirical evidences that abiotic variables, even with relatively low fluctuations, play a critical role in regulating the patterns and strengths of interaction between macrophytes and bacterioplankton.
生物相互作用塑造了生态系统的群落结构和功能，因此在生态系统管理和恢复中发挥着重要作用。为了研究水温（与季节有关）和水深（与河流形态的空间格局有关）如何影响地下水补给河流中的大型植物-细菌浮游生物相互作用，我们根据水文学条件对数据集进行了结构方程建模。除了对大型植物生长和/或细菌浮游生物发育的直接影响外，水温和水深还可以调节不同养分（无机和有机）对这些生物指标的影响作用。更深的水深加剧了大型植物和细菌浮游生物之间的正相关关系，而较高的温度则使这种关系从正相关转变为负相关。本研究提供了经验证据，表明即使是相对较小波动的非生物变量在调节大型植物和细菌浮游生物之间相互作用的模式和强度方面也起着关键作用。
