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  3. Responses Of Depth-dependence Of C:n:p Stoichiometry To Check Dam In Mangrove Wetlands.
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  3. Responses Of Depth-dependence Of C:n:p Stoichiometry To Check Dam In Mangrove Wetlands.

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Responses of depth-dependence of C:N:P stoichiometry to check dam in mangrove wetlands.

Xingyun Huang1, Fangyuan Guan1, Yi Zhong2

  • 1Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, PR China; South China National Botanical Garden, Guangzhou, 510650, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China.

Journal of Environmental Management
|November 14, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

Check dams significantly boost carbon (C), nitrogen (N), and phosphorus (P) accumulation in mangrove soils. These structures enhance nutrient content and alter C, N, P depth-dependency, aiding coastal management.

Keywords:
Carbon sequestrationCheck damDepthElemental stoichiometryPearl river estuary

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Area of Science:

  • Environmental Science
  • Ecology
  • Soil Science

Background:

  • Mangrove wetlands are crucial for climate regulation and nutrient removal.
  • Check dams are used for mangrove protection and restoration.
  • The impact of check dams on mangrove soil C, N, P dynamics is not well understood.

Purpose of the Study:

  • To investigate the effects of check dams on carbon (C), nitrogen (N), and phosphorus (P) content and stoichiometry in mangrove soils.
  • To determine the depth-dependence of these elements in natural versus check dam-affected mangroves.
  • To elucidate the mechanisms by which check dams influence soil nutrient dynamics.

Main Methods:

  • Determined soil deposition depth in natural and check dam-affected mangroves.
  • Analyzed C, N, P content and stoichiometry in bulk soil, microbial biomass, and extracellular enzymes.
  • Examined element depth-dependence across various soil components and vegetation types.
  • Utilized structural equation models to identify causal relationships.

    • Main Results:

    • Check dams significantly increased soil C, N, and P content (15.42%-851.15%) and C:P and N:P stoichiometry (79.81%-94.48%).
    • Check dams altered the depth-dependence of soil C, N, and P.
    • Hydrological processes regulated by check dams influenced nutrient content via soil physical properties and stoichiometry via chemical properties.

    Conclusions:

    • Check dams effectively promote carbon accumulation in mangrove ecosystems.
    • Coastal management strategies involving check dams can enhance nutrient pollution removal.
    • Understanding these impacts is vital for effective mangrove conservation and restoration.