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The White Coral Community In The Central Mediterranean Sea Revealed By ROV Surveys

机译：ROV调查显示地中海中部的白色珊瑚群落

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White coral communities consist of scleractinian corals that thrive in the ocean's bathyal depths (～ 200-4000 m). In the Atlantic Ocean, white corals are known to form complex, three-dimensional structures on the seabed that attract vast amounts of other organisms, accumulate suspended detritus, and influence the local hydrodynamic flow field. These attributes coincide with what we generally describe as a coral reef. With time, environmental change causes decline of the framework-constructing corals; this is followed by erosion of the reef sequence or its draping with noncoral-related deposits. After several such sequences, the structures are known as coral carbonate mounds, which can grow as high as 350 m. Both bathyal white coral reefs and mounds are widely distributed in the Atlantic Ocean and adjacent marginal seas, such as the Gulf of Mexico. The Mediterranean Sea, however, known for its richness of fossil white coral communities exposed in land outcrops, harbors very few extant coral communities. The HERMES project extended its study sites deep into the Mediterranean with state-of-the-art mapping and visualization technology. By doing so, many previously unknown coral sites were discovered during inspections of Mediterranean narrow shelves, canyon walls, escarpments, and seamounts by remotely operated vehicles. Such shelf and continental margin settings are characteristic of the dynamic margins of the Mediterranean Sea and contrast significantly with the much broader shelves of the Atlantic Ocean. This paper reports on a HERMES cruise that was dedicated to exploring these rough submarine topographies in search of white coral communities in the central Mediterranean, and re-evaluates the general perception of the assumed paucity of white corals in this sea.
机译：白色珊瑚群落由Scleractinian珊瑚组成，它们在海洋的海底深度（〜200-4000 m）中壮成长。在大西洋中，已知白色珊瑚在海床上形成复杂的三维结构，这些结构会吸引大量其他生物，积累悬浮的碎屑并影响局部流体动力流场。这些属性与我们通常所说的珊瑚礁相吻合。随着时间的流逝，环境变化会导致构成框架的珊瑚数量下降；接下来是珊瑚礁层序的侵蚀或与非珊瑚相关沉积物的覆盖。经过几次这样的排列后，这些结构被称为碳酸珊瑚丘，可以长到350 m。白色的白色珊瑚礁和土丘广泛分布在大西洋和邻近的边缘海域，例如墨西哥湾。然而，地中海以其丰富的化石白色珊瑚群落而闻名，这些珊瑚群落暴露于陆地露头，却几乎没有现存的珊瑚群落。 HERMES项目使用最新的制图和可视化技术将其研究地点扩展到地中海深处。这样一来，在遥控车辆对地中海狭窄的架子，峡谷壁，悬崖和海山进行检查时，发现了许多以前未知的珊瑚礁。这种大陆架和大陆边缘的设置是地中海动态边缘的特征，并且与大西洋更广阔的大陆架形成鲜明对比。本文报道了HERMES邮轮，该邮轮致力于探索这些粗糙的海底地形，以寻找地中海中部的白珊瑚群落，并重新评估人们对该海中假设的白珊瑚稀缺性的普遍认识。

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  • 来源
    《Oceanography》 |2008年第4期|58-74|共17页
  • 作者

    ANDRE FREIWALD; LYDIA BEUCK; ANDRES RUEGGEBERG; MARCO TAVIANI; DIERK HEBBELN;

  • 作者单位

    GeoZentrum Nordbayern, Universitaet Erlangen-Nuernberg Erlangen, Germany;

    GeoZentrum Nordbayern, Universitaet Erlangen-Nuernberg Erlangen, Germany;

    IFM-GEOMAR, Leibniz Institute of Marine Sciences, Kiel, Germany;

    Istituto di Scienze Marine-Consiglio Nazionale delle Ricerche (ISMAR-CNR), Bologna, Italy;

    MARUM-Zentrum fuer Marine Umweltwissenschaften, Universitaet Bremen, Bremen, Germany;

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