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Tidal effects on the organic carbon mineralization rate under aerobic conditions in sediments of an intertidal estuary

机译：有氧条件下潮间带河口沉积物中潮汐对有机碳矿化速率的影响

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摘要

Laboratory experiments and field measurements were conducted to examine the effect of tide on the organic carbon mineralization rate in sediments under aerobic conditions of an intertidal estuary. Core samples of surface sediments were collected from an intertidal estuary of the Kurose River, Hiroshima, Japan. To mimic low and high tide in the intertidal estuary, organic carbon mineralization rates in the samples were measured in the laboratory under both air-exposed and submerged conditions. Mineralization rates under air-exposed conditions were two to five times higher than those under submerged conditions. Field measurements of the rate of CO_2 emission from the sediment surface revealed a rapid increase in the rate as the sea level fell during ebb tide. The estimated amount of daily organic carbon mineralization assuming a constantly submerged condition was 30% less than that estimated when considering the semi-diurnal fluctuation in sea level. These results indicate that tide has a marked impact on the organic carbon mineralization rate in sediments under aerobic conditions on an intertidal estuary, and tidal effects need to be considered when the amount of mineralized organic carbon is estimated.
机译：进行了实验室实验和现场测量，以检验潮汐对潮汐河口好氧条件下沉积物有机碳矿化速率的影响。地表沉积物的核心样品是从日本广岛的黑濑河的潮间河口采集的。为了模拟潮间河口的低潮和高潮，在暴露于空气和浸入水中的条件下，在实验室中测量样品中的有机碳矿化速率。暴露于空气条件下的矿化率比浸没条件下高2至5倍。实地测量沉积物表面的CO_2排放速率表明，随着退潮期间海平面下降，速率迅速增加。假设持续处于淹没状态，则每日有机碳矿化量的估算值比考虑半日海平面波动时的估算值低30％。这些结果表明，潮汐对潮间河口好氧条件下沉积物中有机碳的矿化速率有显着影响，在估算矿化的有机碳量时需要考虑潮汐影响。

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  • 来源
    《Ecological research》 |2009年第4期|723-729|共7页
  • 作者

    Akiko Sasaki; Yu Hagimori; Takayuki Nakatsubo; Akira Hoshika;

  • 作者单位

    Coastal Environment and Monitoring Research Group,Institute of Geology and Geoinformation,National Institute of Advanced Industrial Science and Technology (A1ST), 2-2-2 Hiro-Suehiro, Kure, Hiroshima 737-0197, Japan;

    Department of Environmental Dynamics and Management. Graduate School of Biosphere Science, Hiroshima University. 1-7-1 Higashi-Hiroshima, Hiroshima 739-8521. Japan;

    Department of Environmental Dynamics and Management. Graduate School of Biosphere Science, Hiroshima University. 1-7-1 Higashi-Hiroshima, Hiroshima 739-8521. Japan;

    Coastal Environment and Monitoring Research Group,Institute of Geology and Geoinformation,National Institute of Advanced Industrial Science and Technology (A1ST), 2-2-2 Hiro-Suehiro, Kure, Hiroshima 737-0197, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    CO_2 emission; intertidal estuary; O_2 consumption; organic carbon mineralization; tide;

    机译：CO_2排放;潮间河口O_2消耗;有机碳矿化;浪潮;

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