Seasonal ecosystem metabolism across shallow benthic habitats measured by aquatic eddy covariance
Seasonal ecosystem metabolism across shallow benthic habitats measured by aquatic eddy covariance
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DOI：
10.1002/lol2.10107
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发表时间：
2019-06-01
影响因子：
7.8
通讯作者：
Norkko, Alf
中科院分区：
文献类型：
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作者：
Attard, Karl M.;Rodil, Ivan F.;Norkko, Alf
浅水底栖生境是碳循环和能量流动的热点，但对新陈代谢（初级生产和呼吸）动力学和特定生境的差异仍然知之甚少。我们调查了日常，季节性和年度代谢在波罗的海6个关键的底栖生物栖息地使用类似的2900小时的原位水生涡动协方差氧通量测量。岩石基质的代谢率最高。每平方米藻类年初级生产量的大小顺序为墨角藻冠层>紫贻贝冠层>大叶藻冠层>混合植物冠层>沙地，而呼吸作用的大小顺序为M. trossulus>F. vesiculosus>Z.滨海>混合水生植物>砂>无光沉积物。冬季代谢占年速率的22-31%。空间尺度放大显示，底栖生境驱动了沃茨90%以上的生态系统代谢
Shallow benthic habitats are hotspots for carbon cycling and energy flow, but metabolism (primary production and respiration) dynamics and habitat-specific differences remain poorly understood. We investigated daily, seasonal, and annual metabolism in six key benthic habitats in the Baltic Sea using similar to 2900h of in situ aquatic eddy covariance oxygen flux measurements. Rocky substrates had the highest metabolism rates. Habitat-specific annual primary production per m(2) was in the order Fucus vesiculosus canopy>Mytilus trossulus reef>Zostera marina canopy>mixed macrophytes canopy>sands, whereas respiration was in the order M. trossulus>F. vesiculosus>Z. marina>mixed macrophytes> sands>aphotic sediments. Winter metabolism contributed 22-31% of annual rates. Spatial upscaling revealed that benthic habitats drive >90% of ecosystem metabolism in waters