Bathymetric zonation of deep-sea macrofauna in relation to export of surface phytoplankton production
Bathymetric zonation of deep-sea macrofauna in relation to export of surface phytoplankton production
复制标题
深海大型动物的水深分区与表层浮游植物产量出口的关系
DOI：
10.3354/meps08388
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发表时间：
2010
影响因子：
2.5
通讯作者：
Yuning Wang
中科院分区：
文献类型：
--
作者：
Chih‐Lin Wei;G. Rowe;G. F. Hubbard;A. Scheltema;G. Wilson;I. Petrescu;J. M. Foster;M. Wicksten;Min Chen;R. Davenport;Yousria Soliman;Yuning Wang
采用箱形岩心（0.2 m2）对墨西哥湾（GoM）北方深水区的大型底栖动物进行了沿着多个深度剖面取样，剖面深度从200 m延伸至盆地最大深度3700 m。根据地理位置之间共有的物种，记录了6个主要类群（共957种）的大型底栖动物群落的水深（深度）带;确定了4个主要深度带，2个中等深度带分为东部和西部亚带。动物区系组成随深度的变化反映了一个潜在的无明显边界的物种更替连续体。的纬向格局与深度和碎屑颗粒有机碳（POC）的输出通量估计从遥感浮游植物色素浓度在地表水。密西西比河及其相关的中尺度涡旋、海底峡谷和深层沉积扇似乎通过从海洋表面和邻近大陆边缘输出有机碳来影响水平分带模式。在局部尺度上，近底流可能通过改变沉积物粒度、食物供应和幼虫扩散来塑造分带模式。这项研究表明，深度，出口POC通量，和CO2- tion之间的宏观生态关系，简约的地带性阈值需要独立测试其他大陆边缘生态系统。
Macrobenthos of the deep, northern Gulf of Mexico (GoM) was sampled with box cores (0.2 m 2 ) along multiple cross-depth transects extending from depths of 200 m to the maximum depth of the basin at 3700 m. Bathy- metric (depth) zonation of the macrofaunal community was documented for 6 major taxa (a total of 957 species) on the basis of shared species among geographic locations; 4 major depth zones were identified, with the 2 intermediate- depth zones being divided into east and west subzones. Change of faunal composition with depth reflects an underlying continuum of species replacements without dis- tinct boundaries. The zonal patterns correlated with depth and detrital particulate organic carbon (POC) export flux estimated from remotely-sensed phytoplankton pigment concentrations in the surface water. The Mississippi River and its associated mesoscale eddies, submarine canyon, and deep sediment fan appear to influence the horizontal zonation pattern through export of organic carbon from the ocean surface and the adjacent continental margin. On the local scale, near-bottom currents may shape the zonation pattern by altering sediment grain size, food availability, and larval dispersal. This study suggests a macroecological relationship between depth, export POC flux, and zona- tion; parsimonious zonal thresholds need to be tested independently for other continental margin ecosystems.