Major implication of the littoral zone for methane release from boreal lakes
Major implication of the littoral zone for methane release from boreal lakes
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DOI：
10.1029/2003gb002105
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发表时间：
2003-12-13
影响因子：
5.2
通讯作者：
Silvola, J
中科院分区：
文献类型：
--
作者：
Juutinen, S;Alm, J;Silvola, J
[ 1]水生环境和陆地环境之间的过渡可被认为是支持高CH 4释放的生态地球化学活跃的生态交错带。我们研究了沿岸的CH 4通量和水生植被，水文条件和沉积物质量之间的联系，并集成到一个全湖的CH 4通量评估。甲烷通量进行了测量，使用一个封闭的室的方法在沿岸的和中上层区的三个芬兰中北部湖泊从5月至10月。累积的CH 4通量的空间集成在湖泊相对于植被覆盖的沿岸的，并在远洋区的深度区。在无冰期，沿岸的带释放了66-77%的CH 4，无冰期这些湖泊的平均CH 4排放量为0.08-0.42 mol m（-2）。沿岸的和水层的生产力反映在CH 4从湖泊释放。我们的研究结果表明，湖泊甲烷释放的估计应包括植被的沿岸的区的评估。
[ 1] Transitions between aquatic and terrestrial environments can be recognized as biogeochemically active ecotones that support high CH4 release. We studied the links between littoral CH4 fluxes and aquatic vegetation, hydrologic conditions, and sediment quality, and integrated the CH4 fluxes into a whole-lake assessment. Methane fluxes were measured using a closed chamber method in the littoral and pelagic zones of three Finnish mid-boreal lakes from May to October. The cumulative CH4 fluxes were spatially integrated over the lake relative to the vegetation coverage in the littoral, and to depth zones in the pelagic regions. During the ice-free period, 66-77% of the CH4 was released from the littoral zone, and the mean CH4 effluxes from these lakes were 0.08-0.42 mol m(-2) ice-free season(-1). Littoral and pelagic productivity was reflected in CH4 release from the lakes. Our results show that estimates of lake CH4 release should include an assessment of the vegetated littoral zone.