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

第一作者： Wang, Pengtao

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

作者机构：

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

期刊名称：CATENA （ 影响因子：5.7； 五年影响因子：6.3 ）

ISSN： 0341-8162

年卷期： 2024 年 246 卷

页码：

收录情况： SCI

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) y(-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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