Community functional traits shift under long-term nitrogen addition: Roles of intraspecific trait variability and species turnover

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ID: 313959
2026
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Abstract
Abstract Plant functional traits at the community level determine ecosystem responses to environmental change. Despite globally increasing nitrogen deposition, the roles of intraspecific trait variability (ITV) and species turnover in shaping community composition of functional traits under long-term nitrogen deposition remain unclear. We conducted a 10-yr nitrogen addition experiment in an alpine meadow and measured five key leaf traits: leaf nitrogen content (LNC), specific leaf area (SLA), leaf dry matter content (LDMC), leaf thickness (LT), and leaf area (LA). Nitrogen addition increased community-weighted means (CWMs) of LNC and SLA but decreased LT. Sum of squares decomposition revealed that ITV primarily drove changes in LNC, SLA, and LDMC, whereas species turnover mainly influenced LT. ITV was shaped by soil inorganic nitrogen and light availability, while species turnover was mainly driven by soil inorganic nitrogen. These findings reflect the complex adaptive strategies of plant communities in nitrogen-enriched environments and offer insights into the mechanisms driving community composition changes of functional traits under nitrogen addition.
Reference Key
openalex_W7161595733 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Chen Chen, Jinlong Peng, Jiaqiang Liao, Fangfang Ma, Dashuan Tian, Han Y H Chen, Shuli Niu
Journal journal of plant ecology
Year 2026
DOI
10.1093/jpe/rtag101
URL
https://doi.org/10.1093/jpe/rtag101
Keywords Keywords not found

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