闽江口红树林树干呼吸时间动态研究
首发时间:2020-11-19
摘要:在全球变暖的背景下,湿地碳循环过程受到广泛关注。本研究开展了闽江河口秋茄(Kandelia obovata)红树林湿地树干呼吸的研究。于2017年12月至2018年11月,对闽江河口粗芦岛红树林生态系统中的秋茄树干呼吸和土壤呼吸进行了为期一年的测定。结果表明:不同胸径的秋茄树干呼吸速率:DBH>3.8cm的秋茄树木的树干呼吸速率要显著大于DBH<3.8cm的树干呼吸速率。树干呼吸和土壤呼吸均在季节上表现为在夏季显著高于其他季节;在0.35m、0.75m和1.15m树干高度树干呼吸,表现为0.35m显著高于0.75m和1.15m处;秋茄树干呼吸和土壤呼吸均与温度存在极强的相关关系(p<0.01),与其他环境因子的相关关系不显著。?????
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Temporal Dynamics of Stem Respiration of Mangrove in Minjiang Estuary
Abstract:Under the background of global warming, wetland carbon cycle has attracted wide attention. In this study, stem respiration of Kandelia obovata of mangrove wetland in Minjiang Estuary was studied. From December 2017 to November 2018,stem respiration and soil respiration of Kandelia obovata Mangrove of Culu Island in Minjiang Estuary were measured for one year. The results showed that the stem respiration rate of Kandelia obovata with DBH>3.8cm was significantly higher than that of trees with DBH < 3.8cm. Stem respiration and soil respiration were significantly higher in summer than in other seasons; Stem respiration at height of 0.35m, was significantly higher than that at 0.75m and 1.15m.height; Stem respiration and soil respiration were strongly correlated with temperature (p<0.01), but not with other environmental factors.
Keywords: Physicalgeography Stem respiration Soil respiration Mangrove Minjiang Estuary
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