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首页> 外文期刊>Estuarine Coastal and Shelf Science >Nutrient fluxes in a semi-arid microtidal mangrove wetland in the Gulf of California
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Nutrient fluxes in a semi-arid microtidal mangrove wetland in the Gulf of California

机译：加利福尼亚湾半干旱微潮红树林湿地的养分通量

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摘要

Nutrient (C, N and P) fluxes were monitored in a microtidal semi-arid mangrove system, which links a semi-enclosed shallow coastal lagoon with the Gulf of California. We assessed the role of the mangrove ecosystem as a nutrient sink/source and determined how mangrove litterfall rates, tidal regime and climate factors influence these fluxes. Despite high seasonal differences in DOC, POC, N-NO_3~- and TP levels, nutrient concentrations were only marginally influenced by either hydrological variables or the concentration of these fractions in the adjacent lagoon. The carbon budget appeared to be balanced throughout the study. Retention rates in the mangrove system were related to litterfall rates. Export of DIN was observed mainly in the wet season due to the low nitrogen assimilation efficiency of the system. Import of organic nitrogen was related to the high retention efficiency of particulate organic nitrogen. Phosphorus fractions were imported and retained in the mangrove supporting previous findings that mangroves are phosphorus sinks. Finally, through a simple meta-analysis we tested the quantitative importance of main variables (tidal flow, tidal elevation, tidal range, rainfall, mangrove catchment area, litterfall) controlling mangrove nutrient dynamics. Although results suggest that generalizations can be made about factors regulating nutrient export from mangroves, the lack of statistical significance highlights the relative importance of the local environment for the magnitude of nutrient exchange in mangroves. Future research should focus on finding mechanistic models to explain these general patterns, taking into account the main biogeochemical processes and their roles in coastal ecosystem ecology.
机译：在微潮半干旱红树林系统中监测了养分（C，N和P）通量，该系统将半封闭的浅海泻湖与加利福尼亚湾相连。我们评估了红树林生态系统作为养分汇/源的作用，并确定了红树林凋落率，潮汐状态和气候因素如何影响这些通量。尽管DOC，POC，N-NO_3〜-和TP的季节差异很大，但营养盐浓度仅受水文变量或邻近泻湖中这些馏分浓度的轻微影响。在整个研究过程中，碳预算似乎保持平衡。红树林系统中的保留率与凋落物发生率有关。由于系统的氮同化效率低，主要在雨季观察到DIN的出口。有机氮的进口与颗粒状有机氮的高保留效率有关。磷馏分被输入并保留在红树林中，这支持了先前的研究，即红树林是磷的汇。最后，通过简单的荟萃分析，我们测试了控制红树林养分动态的主要变量（潮汐流量，潮高，潮差，降雨量，红树林集水区，凋落物）的定量重要性。尽管结果表明可以对调节红树林养分输出的因素进行概括，但是缺乏统计意义突出了当地环境对于红树林养分交换量的相对重要性。未来的研究应集中在寻找机制模型来解释这些一般模式，同时考虑到主要的生物地球化学过程及其在沿海生态系统生态中的作用。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2009年第4期|654-662|共9页
  • 作者

    S. Sanchez-Carrillo; R. Sanchez-Andres; L.C. Alatorre; D.G. Angeler; M. Alvarez-Cobelas; J.A. Arreola-Lizarraga;

  • 作者单位

    CSIC - Institute of Natural Resources, Serrano 115 dpdo, E-28006 Madrid, Spain;

    CSIC - Royal Botanic Garden, Pza. de Murillo 2, E-28014 Madrid, Spain;

    CSIC - Pyrenean Institute of Ecology, Avda. Montanana 1005, E-50080 Zaragoza, Spain;

    Institute of Environmental Sciences (ICAM), University of Castilla-La Mancha, Avda. Carlos Ⅲ s, E-45071 Toledo, Spain Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment, PO Box 7050, SE-750 07 Uppsala, Sweden;

    CSIC - Institute of Natural Resources, Serrano 115 dpdo, E-28006 Madrid, Spain;

    The Northwestern Center of Biological Research-CIBNOR, Unidad Guaymas, Can. a Las Tinajas Predio El Tular s, Cuaymas, Sonora CP.85454, Mexico;

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  • 正文语种 eng
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  • 关键词

    mangrove; semi-arid; nutrient flux; nutrient export; Gulf of California;

    机译：红树;半干旱营养通量营养物质出口;加利福尼亚湾;

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