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首页> 外文期刊>Polar biology >Biodiversity and distribution of the genus Gromia (Protista, Rhizaria) in the deep Weddell Sea (Southern Ocean)
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Biodiversity and distribution of the genus Gromia (Protista, Rhizaria) in the deep Weddell Sea (Southern Ocean)

机译：韦德海深处（南部海洋）格罗米亚属（Protista，根iz属）的生物多样性和分布

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摘要

We present a survey of morphospecies of Gromia, a genus of testate protists, from bathyal and abyssal depths in the Weddell Sea and adjacent areas of the Southern Ocean. This material represents the most extensive and diverse available collection of deep-sea gromiids so far recorded. The twelve species, nine of which are undescribed, are recognized on the basis of morphological criteria, including the test size and shape, the appearance and structure of the oral capsule, and the characteristics of the test wall. Most species have a single oral capsule, which is circular in plan view with a conical nipple-like shape in lateral view. One morphospecies has three oral capsules. The appearance and structure of the wall displays great variability among Gromia species, ranging from very delicate and transparent with highly reflective highlights to relatively thick with distinct patterns of ridges covering the surface. More often, however, differences in wall structure are more subtle. Most morphospecies were distributed at bathyal depths along the continental margin, but one was sampled at ～4,800 m, representing the first record of an abyssal gromiid. Concurrent with findings from other regions of the World's oceans, the Weddell Sea gromiids were mostly found in surficial sediments in areas of elevated organic input, suggesting that deep-sea gromiids are likely to play an important role in carbon cycling in bathyal eutrophic regions through the ingestion and degradation of fresh organic matter.
机译：我们提供了从韦德海和南大洋邻近地区的深海和深海深度对格罗米亚的种形态进行的调查。该材料代表了迄今为止已记录的最广泛和最广泛的深海类小怪兽收藏。根据形态学标准（包括测试尺寸和形状，口服胶囊的外观和结构以及测试壁的特性）可以识别出十二种，其中九种尚未描述。大多数种类具有单个口服胶囊，其在平面图中为圆形，在侧视图中为圆锥形乳头状。一种形态学有三个口服胶囊。墙的外观和结构在格罗米亚树种之间显示出很大的变异性，从非常细腻，透明，具有高反射性的高光到相对厚，具有覆盖整个表面的独特脊纹。然而，更多时候，墙壁结构的差异更加微妙。大多数形态物种分布在沿大陆边缘的海床深度，但其中一个在〜4,800 m处采样，代表了深海格罗米德的第一个记录。与世界海洋其他地区的发现同时出现的是，韦德海的格罗米德人大多在有机物输入增加的区域的表层沉积物中发现，这表明深海格罗米德人可能在整个富营养化地区的海水富营养化地区的碳循环中发挥重要作用。摄入和降解新鲜有机物。

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