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July 1, 2026DiversityOpen Access

Responses of a Dominant Wetland Grass, Cynodon dactylon, to Flooding and Drought Stress in the Drawdown Zone of the Three Gorges Reservoir, China: A Trait-Based Meta-Analysis

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Authors

YHYanxia HuJZJinhui ZhaoCWCe Wang

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Overview

Meta-analysis reveals flooding stress impacts on Cynodon dactylon, highlighting its vulnerability in artificial wetlands.

Key Points

  • This research aims to synthesize the responses of Cynodon dactylon to flooding and drought stress in the Three Gorges Reservoir's drawdown zone.
  • Conducted a PRISMA 2020 literature search and screening, synthesizing 169 effect sizes from 12 studies.
  • Compared flooding effects using subgroup analyses with bootstrap confidence intervals.
  • Calculated natural log response ratios (lnRR) for various physiological traits.
  • Shallow flooding increased total biomass by +47.2%, while deep flooding reduced plant height by -46.5% and root length by -22.3%.
  • Flooding increased malondialdehyde content (MDA) by 31.7%, indicating oxidative damage.
  • Drought effects on biomass, plant height, and chlorophyll were non-significant, showing limited influence compared to flooding.

Cite This Study

Hu et al. (2026) studied this question.

synapsesocial.com/papers/6a44b0085cd2549c8bc44d09https://doi.org/10.3390/d18070395
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Effects of Flooding Duration on Plant Root Traits and Soil Erosion Resistance in Water-Level Fluctuation Zones: A Case Study from the Three Gorges Reservoir, China2025
  2. 2Stress Memory in Cynodon dactylon (L.) Pers During Succession in Drawdown Zones: Implications for Vegetation Restoration and Sustainable Management2026 · 1 citations
  3. 3Cynodon dactylon and Sediment Interaction in the Three Gorges Reservoir: Insights from a Three-Year Study2024 · 1 citations
  4. 4Anti-seasonal flooding drive substantial alterations in riparian plant diversity and niche characteristics in a unique hydro-fluctuation zone2024
  5. 5Assessing leaf physiological traits in response to flooding among dominant riparian herbs along the Three Gorges Dam in China2024 · 5 citations