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首页> 外文期刊>Estuarine Coastal and Shelf Science >Methane sources, sinks and fluxes in a temperate tidal Lagoon: The Arcachon lagoon (SW France)
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Methane sources, sinks and fluxes in a temperate tidal Lagoon: The Arcachon lagoon (SW France)

机译：温带潮汐泻湖中的甲烷源，汇和通量：阿尔卡雄泻湖（法国西南部）

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摘要

The Arcachon lagoon is a 156 km~2 temperate mesotidal lagoon dominated by tidal flats (66% of the surface area). The methane (CH_4) sources, sinks and fluxes were estimated from water and pore water concentrations, from chamber flux measurements at the sediment-air (low tide), sediment-water and water-air (high tide) interfaces, and from potential oxidation and production rate measurements in sediments. CH_4 concentrations in waters were maximal (500-1000 nmol l~(-1)) in river waters and in tidal creeks at low tide, and minimal in the lagoon at high tide (<50 nmol l(-1)). The major CH_4 sources are continental waters and the tidal pumping of sediment pore waters at low tide. Methanogenesis occurred in the tidal flat sediments, in which pore water concentrations were relatively high (2.5-8.0 μmol l~(-1)). Nevertheless, the sediment was a minor CH_4 source for the water column and the atmosphere because of a high degree of anaerobic and aerobic CH_4 oxidation in sediments. Atmospheric CH_4 fluxes at high and low tide were low compared to freshwater wetlands. Temperate tidal lagoons appear to be very minor contributor of CH_4 to global atmosphere and to open ocean.
机译：阿卡雄泻湖是一个156 km〜2的温带中速泻湖，以滩涂为主（占表面积的66％）。甲烷（CH_4）源，汇和通量是根据水和孔隙水的浓度，沉积物-空气（低潮），沉积物-水和水-空气（高潮）界面处的通量测量值以及潜在的氧化作用估算的和沉积物的生产率测量。退潮时河水中和潮汐小溪中的CH_4浓度最高（500-1000 nmol l（-1）），泻湖中退潮时CH_4的浓度最低。 CH_4的主要来源是大陆水和退潮时沉积物孔隙水的潮汐泵送。甲烷生成发生在潮滩沉积物中，孔隙水浓度较高（2.5-8.0μmoll〜（-1））。然而，由于沉积物中高度的厌氧和好氧CH_4氧化，沉积物是水柱和大气中次要的CH_4来源。与淡水湿地相比，涨潮和退潮时的CH_4大气通量均较低。温带潮汐泻湖似乎对CH_4对全球大气和开放海洋的贡献很小。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2010年第4期|p.256-266|共11页
  • 作者

    Jonathan Deborde; Pierre Anschutz; Frederic Guerin; Dominique Poirier; Danielle Marty; Guy Boucher; Gerard Thouzeau; Mathieu Canton; Gwenaeel Abril;

  • 作者单位

    Universite Bordeaux 1 CNRS UMR 5805 Environnements et Paleoenvironnements OCeaniques (EPOC), 33405 Talence, France Institut de Recherche pour le Developpement (IRD), Centre de Noumea, BPA5, 98848 Noumea, New Caledonia;

    rnUniversite Bordeaux 1 CNRS UMR 5805 Environnements et Paleoenvironnements OCeaniques (EPOC), 33405 Talence, France;

    rnUniversite de Toulouse, UPS (OMP), LMTG, 14 Av Edouard Belin, F-31400 Toulouse, France CNRS, LMTG, F-31400 Toulouse, France IRD, LMTG, F-31400 Toulouse, France;

    rnUniversite Bordeaux 1 CNRS UMR 5805 Environnements et Paleoenvironnements OCeaniques (EPOC), 33405 Talence, France;

    rnCentre d'Oceanologie de Marseille (COM), CNRS UMR 6117 LMGEN, 13288 Marseille, France;

    rnBiologie des Organismes Marins et Ecosystemes (BOME), USM 0401 CNRS UMR 5178, MNHN, 75231 Paris, France;

    rnInstitut Universitaire Europeen de la Mer, CNRS UMR 6539 LEMAR 29280 Plouzane, France;

    rnUniversite Bordeaux 1 CNRS UMR 5805 Environnements et Paleoenvironnements OCeaniques (EPOC), 33405 Talence, France;

    rnUniversite Bordeaux 1 CNRS UMR 5805 Environnements et Paleoenvironnements OCeaniques (EPOC), 33405 Talence, France;

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  • 正文语种 eng
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  • 关键词

    methane; chamber flux measurements; coastal environment; arcachon lagoon;

    机译：甲烷腔室通量测量;沿海环境;阿卡雄泻湖;

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