The Eugen Seibold coral mounds offshore western Morocco: oceanographic and bathymetric boundary conditions of a newly discovered cold-water coral province
The Eugen Seibold coral mounds offshore western Morocco: oceanographic and bathymetric boundary conditions of a newly discovered cold-water coral province
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摩洛哥西部近海的尤金·塞博尔德珊瑚丘：新发现的冷水珊瑚省的海洋学和测深边界条件
DOI：
10.1007/s00367-015-0405-7
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发表时间：
2015
影响因子：
2.1
通讯作者：
Glogowski S
中科院分区：
文献类型：
--
作者：
Glogowski S
这项研究报告了一个新的冷水珊瑚（CWC）省，覆盖约410平方公里的摩洛哥西部（约。31°N）~阿加迪尔峡谷系统以北40海里，水深678至863米，这里被命名为Eugen Seibold珊瑚土丘。个别土丘高达12米，坡度在3°至12°之间。水声数据显示丘轴长度为80至240米。坡角、丘高和土丘密度随水深的增加而减小。最深的土丘是由死亡和破碎的Lophelia pertusabranches组成的。主要是活的CWC L.在678米至719米水深之间，用箱式岩心对Pertusa进行了取样。电导率-温度-深度（CTD）测量显示，在北大西洋中央水域（NACW;保守温度Θ为9.78-9.94 °C，绝对盐度SA约为1.00 - 1.00 ° C）的较深部分存在活的CWC菌落。35.632 g/kg，海水密度σ θ为27.31-27.33 kg/m3）。毛里塔尼亚外海（北纬17 -18度）和加迪斯湾雷纳德海岭（北纬35度）上的类似化学武器公约珊瑚礁也位于地中海流出水稍上方的北大西洋公约组织深层，后者仅由一个死的化学武器公约组构组成。新的化学武器公约区覆盖着薄薄的活珊瑚，死灌木丛和破碎的珊瑚碎石堆积量大得多，通过CTD勘测，利用海水密度作为化学武器公约发生的潜在指标，然后进行水声测绘，成功地发现了这个新的化学武器公约区。对宏观蚀变埋藏的Lopheliamaterial（25 cm沉积深度）进行U-Th同位素系统学研究，得出至少可追溯到全新世晚期的绝对年龄。
This study reports a new cold-water coral (CWC) province covering ~410 km2off western Morocco (ca. 31°N) ~40 nautical miles north of the Agadir Canyon system between 678 and 863 m water depth, here named the Eugen Seibold coral mounds. Individual mounds are up to 12 m high with slope angles varying between 3° and 12°. Hydroacoustic data revealed mound axes lengths of 80 to 240 m. Slope angle, mound height, and density of mounds decrease with increasing water depth. The deepest mounds are composed of dead and fragmentedLophelia pertusabranches. Living CWCs, mainlyL. pertusa, were sampled with box cores between 678 and 719 m water depth. Conductivity-temperature-depth (CTD) measurements revealed living CWC colonies to occur within the deeper part of the North Atlantic Central Water (NACW; conservative temperature Θ of 9.78–9.94 °C, absolute salinity SAof ca. 35.632 g/kg, and seawater density σΘ of 27.31–27.33 kg/m3). Comparable CWC reefs off Mauritania (17°N–18°N) and on the Renard Ridge (35°N) in the Gulf of Cadiz, the latter consisting only of a dead CWC fabric, are also located in the deeper layer of the NACW slightly above the Mediterranean Outflow Water. The new CWC province, with its thin cover of living corals and much larger accumulations of dead thickets and fragmented coral rubble, was successfully discovered by CTD reconnaissance applying seawater density as a potential indicator of CWC occurrences, followed by hydroacoustic mapping. U-Th isotope systematics for macroscopically altered buriedLopheliamaterial (25 cm sediment depth) yielded absolute ages dating back to the late Holocene at least.
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DOI：
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发表时间：
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