数字农科院2.0

Integrative analysis of nutrient dynamics and its hydrological pathways in a tropical montane forest watershed: Implications for landscape management

文献类型： 外文期刊

作者： Pengtao Wang;Dongyang Han;Chi Zhang;Fei Yu;Xin Wang;Pengfei Huang;Ganggang Zhang;Shaoqing Liu

作者机构：

关键词： Lateral flow;Nutrient limitation;Organic N losses;Tropical forests;Watershed simulation

期刊名称： Catena

ISSN： 0341-8162

年卷期： 2024 年 246 卷

页码：

收录情况： SCIE（2024版）

摘要： This study addresses a significant knowledge gap regarding the relationship between nutrient exports and abiotic factors in tropical forested watersheds. Focusing on a tropical forest watershed located on Hainan Island, we investigated the interactions between nitrogen (N) and phosphorus (P) exports and topographic, hydrological, and landscape elements. Using a model-data integration approach, our findings revealed that nutrient exports are predominantly in organic N and P forms, with the values of 15.66 ± 1.87 kg ha−1 yr−1 and 0.26 ± 0.07 kg ha−1 yr−1, respectively. Inorganic N and P were primarily sourced from orchards, while organic N predominantly originates from forest areas. Additionally, lateral flow was identified as the dominant hydrological pathway for nutrient transport, significantly influenced by topographical gradients. A parabolic relationship between organic N export and forest landscape fragmentation was also observed. These findings emphasize the importance of targeted landscape management strategies, such as selective logging, to mitigate N limitation in tropical forest watersheds, advancing the understanding of nutrient export dynamics and providing practical implications for sustainable forest management and conservation efforts.

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