Potential export of unattached benthic macroalgae to the deep sea through wind-driven Langmuir circulation
Potential export of unattached benthic macroalgae to the deep sea through wind-driven Langmuir circulation
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DOI：
10.1029/2008gl036188
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发表时间：
2009-02-18
影响因子：
5.2
通讯作者：
Burdige, D. J.
中科院分区：
文献类型：
--
作者：
Dierssen, H. M.;Zimmerman, R. C.;Burdige, D. J.
碳向深海的出口通常被归因于公海浮游植物的沉没。在这里，我们报道了一个由大风驱动的朗缪尔超级单体事件，它横跨浅的大巴哈马浅滩，将底栖非附着的大型藻类Colpomeia sp.组织成海底可见的窗帘。在风降前后获得的海洋颜色卫星图像显示，一片588平方公里的土地迅速从高产的大型藻类变成了裸露的沙子。我们评估了这种巨藻的一些可能的命运，并争辩说，这一事件潜在地将负浮力的巨藻以7x1010克碳的脉冲输出输送到大洋深处的舌状物中。这相当于热带北大西洋中上层浮游植物生物量的日碳通量和全球海洋日碳通量的0.2-0.8%。沿海河岸和海湾是生产力很高的生态系统，可能对向深海输出碳有很大贡献。引文：Dierssen，H.M.，R.C.Zimmerman，L.A.Drake和D.J.Burdige(2009)，通过风力驱动的朗缪尔环流，地球物理，可能将独立的底栖大型藻类出口到深海。莱特，36，L04602，DOI：10.1029/2008GL036188。
Carbon export to the deep sea is conventionally attributed to the sinking of open ocean phytoplankton. Here, we report a Langmuir supercell event driven by high winds across the shallow Great Bahama Bank that organized benthic non-attached macroalgae, Colpomenia sp., into visible windrows on the seafloor. Ocean color satellite imagery obtained before and after the windrows revealed a 588 km 2 patch that rapidly shifted from highly productive macroalgae to bare sand. We assess a number of possible fates for this macroalgae and contend that this event potentially transported negatively buoyant macroalgae to the deep Tongue of the Ocean in a pulsed export of > 7 x 10 10 g of carbon. This is equivalent to the daily carbon flux of phytoplankton biomass in the pelagic tropical North Atlantic and 0.2-0.8% of daily carbon flux from the global ocean. Coastal banks and bays are highly productive ecosystems that may contribute substantially to carbon export to the deep sea. Citation: Dierssen, H. M., R. C. Zimmerman, L. A. Drake, and D. J. Burdige (2009), Potential export of unattached benthic macroalgae to the deep sea through wind-driven Langmuir circulation, Geophys. Res. Lett., 36, L04602, doi: 10.1029/2008GL036188.