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<p>This study conducted a comprehensive investigation of the spatial patterns of sediment and leaf carbon (C): nitrogen (N): phosphorus (P): potassium (K) stoichiometry and the drivers of leaf stoichiometry in mangrove forests across entire Hainan Island, China. Across Hainan Island, the sediment C:K, N:K, and P:K ratios increased with latitude, while the sediment C:P, C:K, and N:K ratios increased with longitude. The leaf C:P and N:P ratios decreased with increasing latitude. The leaf C:K and N:K ratios decreased, while the leaf C:P and N:P ratios initially increased then decreased with longitude. Among collected environmental factors, climatic factors explained the greatest proportion of the spatial variations in leaf C:N:P:K stoichiometry, far exceeding the contributions of sediment (especially sediment C:N:P:K stoichiometry) and vegetation characteristics. Sediment and leaf C:N:P:K stoichiometry exhibited distinct and opposing patterns. Spatial variations of mangrove leaf C:N:P:K stoichiometry showed a more pronounced longitudinal gradient, particularly for K. Climate emerged as the dominant factor shaping the spatial patterns of leaf C:N:P:K stoichiometry in mangroves on Hainan Island. These findings enhance our understanding of nutrient limitations in mangroves and provide valuable insights for conservation and management these vital coastal ecosystems to maintain their ecological functioning and contributions to marine biogeochemical cycles.</p>

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Geographic patterns and drivers of leaf C:N:P:K stoichiometry in mangrove forests across Hainan Island: climatic forcing overwhelms sedimentary effect

  • 期刊论文

  • 发表日期：

    2026年2月16日

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  • Qian Chen,
  • Lin Du,
  • Chengqian He,
  • Jingyi Cui,
  • Mengli Wang,
  • Zhongyi Sun,
  • Quan Chen

摘要

This study conducted a comprehensive investigation of the spatial patterns of sediment and leaf carbon (C): nitrogen (N): phosphorus (P): potassium (K) stoichiometry and the drivers of leaf stoichiometry in mangrove forests across entire Hainan Island, China. Across Hainan Island, the sediment C:K, N:K, and P:K ratios increased with latitude, while the sediment C:P, C:K, and N:K ratios increased with longitude. The leaf C:P and N:P ratios decreased with increasing latitude. The leaf C:K and N:K ratios decreased, while the leaf C:P and N:P ratios initially increased then decreased with longitude. Among collected environmental factors, climatic factors explained the greatest proportion of the spatial variations in leaf C:N:P:K stoichiometry, far exceeding the contributions of sediment (especially sediment C:N:P:K stoichiometry) and vegetation characteristics. Sediment and leaf C:N:P:K stoichiometry exhibited distinct and opposing patterns. Spatial variations of mangrove leaf C:N:P:K stoichiometry showed a more pronounced longitudinal gradient, particularly for K. Climate emerged as the dominant factor shaping the spatial patterns of leaf C:N:P:K stoichiometry in mangroves on Hainan Island. These findings enhance our understanding of nutrient limitations in mangroves and provide valuable insights for conservation and management these vital coastal ecosystems to maintain their ecological functioning and contributions to marine biogeochemical cycles.