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JenaTron - An Experimental Approach to Study the Effects of Plant History and Soil History on Grassland Ecosystem Functioning

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Increasing drying changes the relationship between biodiversity and ecosystem multifunctionality.

Chaoran Li¹, Jun Hou¹, Ming Kong²

¹Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, People's Republic of China.

NPJ Biofilms and Microbiomes

|May 6, 2025

Summary

This summary is machine-generated.

Global climate change causes river drying and biodiversity loss. Long-term drying decouples biodiversity from community stability, with community assembly becoming key for ecosystem multifunctionality.

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Area of Science:

Ecology
Environmental Science
Microbiology

Background:

Global climate change is increasing river drying events worldwide.
River drying leads to significant biodiversity loss.
The impact of biodiversity loss on river ecosystem functions remains unclear.

Purpose of the Study:

To investigate how varying drying durations affect river biofilm community diversity.
To determine the consequences of altered biofilm diversity on ecosystem functions.
To understand the relationship between biodiversity, community assembly, and ecosystem multifunctionality under drying stress.

Main Methods:

An artificial stream mesocosm was used to simulate river drying.
Biofilm communities were exposed to different durations of drying (short-term: ~0-20 days; long-term: ~60-130 days).
Changes in microbial community composition and ecosystem functions were analyzed.

Main Results:

A critical drying duration of approximately 60 days was identified, marking a shift in microbial composition and functions.
Long-term drying (60-130 days) decoupled the relationship between biodiversity and community stability.
Community assembly, rather than biodiversity, emerged as the dominant factor in maintaining ecosystem multifunctionality with increased drying duration.

Conclusions:

River drying significantly alters microbial community structure and function.
Community assembly plays a crucial role in maintaining ecosystem multifunctionality in drying rivers, challenging traditional views of biodiversity's role.
This research extends theoretical understanding of biodiversity-ecosystem multifunctionality relationships under environmental stress.