Effects of soil temperature and tidal condition on variation in carbon dioxide flux from soil sediment in a subtropical mangrove forest
Effects of soil temperature and tidal condition on variation in carbon dioxide flux from soil sediment in a subtropical mangrove forest
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DOI：
10.1017/s026646741800024x
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发表时间：
2018-07
影响因子：
1.4
通讯作者：
M. Tomotsune;S. Yoshitake;Yasuo Iimura;Morimaru Kida;N. Fujitake;H. Koizumi;T. Ohtsuka
中科院分区：
文献类型：
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作者：
M. Tomotsune;S. Yoshitake;Yasuo Iimura;Morimaru Kida;N. Fujitake;H. Koizumi;T. Ohtsuka
翻译后摘要：从森林地面的CO2通量的变化是很重要的，在了解红树林森林作为碳汇的作用。为了阐明土壤温度和潮汐条件对CO2通量变化的影响，于2012年6月至2013年5月测量了沉积物-大气CO2通量。在日本西南部的一片红树林中，我们使用了两个地块的封闭室方法，海拔差为0.5 m（B，高海拔; R-B，低海拔）。CO2通量在温暖的季节最高，并表现出弱的正相关性与土壤温度在两个森林。估算的月CO2通量表现出温和的季节变化，根据暴露时间的土壤表面下的潮汐波动。此外，测得的CO2通量和土壤温度略高于在R-B图比B图，虽然估计的年CO2通量较高的B图比R-B图由于不同的曝光时间。这些结果表明，在暴露持续时间的森林地面，季节性变化和微地理的变化，是重要的，在评估年度CO2通量在当地尺度和理解的作用，红树林生态系统作为调节器的大气CO2。
Abstract: The variation in CO2 flux from the forest floor is important in understanding the role of mangrove forests as a carbon sink. To clarify the effects of soil temperature and tidal conditions on variation in CO2 flux, sediment–atmosphere CO2 fluxes were measured between June 2012 and May 2013. We used the closed chamber method for two plots, with a 0.5 m difference in elevation (B, high elevation; R-B, low elevation), in a mangrove forest in south-western Japan. CO2 fluxes were highest in the warm season and showed a weak positive correlation with soil temperature in both forests. Estimated monthly CO2 flux showed moderate seasonal variation in accordance with the exposure duration of the soil surface under tidal fluctuation. Additionally, measured CO2 flux and soil temperature were slightly higher in the R-B plot than the B plot, although estimated annual CO2 flux was higher in the B plot than the R-B plot due to different exposure durations. These results suggest that variation in the exposure duration of the forest floor, which changes seasonally and microgeographically, is important in evaluating the annual CO2 flux at a local scale and understanding the role of mangrove ecosystems as regulators of atmospheric CO2.