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营养输入对河流微核细胞稳定的级联影响:息地异质性驱动的组装机制

Yifei Fan¹, Tao Xiang¹, Zetao Dai¹

¹Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of Environment and Ecology, Xiamen University, Xiamen, 361102, Fujian, China.

Journal of environmental management

|May 7, 2025

概括

土地利用变化和营养污染对河流微核细胞群体产生重大影响. 高的营养水平减少了生物多样性,通过改变物种相互作用和促进专业化来破坏生态系统的稳定性.

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:

河流生态系统的健康状况是由微核细胞组合和稳定性表明的.
土地利用变化对水生生物多样性和生态系统功能产生重大影响.
农业和城市地区的营养污染改变了河流息地.

研究的目的:

调查土地利用和季节性变化的影响河流中的微核细胞群落.
分析物种组成,社区聚集和网络稳定性的变化.
为了确定驱动这些变化的机制.

主要方法:

18S rDNA amplicon测序用于分析微核细胞物种组成.
社区汇集分析,包括并发网络和稳定性指标.
评估环境因素,如总和的度.

主要成果:

农业和城市河流段的营养度明显高于森林段.
土地利用变化减少了微核细胞的多样性,简化了食物网,并有利于低营养水平的物种.
高营养环境导致利基收缩,专业化增加,社区稳定性下降.
干旱季节的决定性过程更为明显,而雨季的环境过则占主导地位.
营养投入被确定为微核细胞社区不稳定的主要驱动因素.

结论:

土地利用和营养污染从根本上改变了河流微核细胞社区的结构和功能.
季节性变化与土地使用相互作用,影响社区聚集和稳定.
营养管理对于保持河流生态系统的健康和稳定至关重要.

关键词:

社区的集会社区的集会生态网络生态网络土地使用情况土地使用情况微型单核细胞是如何形成的网络稳定性网络稳定性

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相关概念视频

Primary Production

Primary Production

The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.

What is an Ecosystem?

What is an Ecosystem?

What are Biogeochemical Cycles?

What are Biogeochemical Cycles?

The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.

Ecological Disturbance

Ecological Disturbance

An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.

Production Efficiency

Production Efficiency

Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).