Ascidians (Tunicata, Ascidiacea) of Potter Cove, South Shetland Islands, Antarctica
Ascidians (Tunicata, Ascidiacea) of Potter Cove, South Shetland Islands, Antarctica
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南极洲南设得兰群岛波特湾的海鞘（Tunicata、Ascidiacea）
DOI：
10.1017/s0954102098000194
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发表时间：
1998
影响因子：
1.6
通讯作者：
G. Esnal
中科院分区：
文献类型：
--
作者：
M. Tatián;R. Sahade;M. Doucet;G. Esnal
某些物理因素、基质类型和冰作用似乎是海鞘分布的重要决定因素。通过水肺潜水在 0-30 m 的深度采样了三种不同的基质类型：软底、硬底和冰碛沉积物。发现的物种有Aplidium radiatum、Synoicum adareanum、Distaplia cylindrica、Sycozoa gaimardi、Sycozoa sigillinoides、Tylobranchion spiosum、Corella eumyota、Ascidia Challengeri、Cnemidocarpa verrucosa、Styela wandeli、Dicarpa insinuosa、Pyura bouvetensis、Pyura discoveryi、Pyura obesa、Pyura setosa、Molgula enodis 和 Molgula pedunculata。在不太严格的环境中发现了最高的多样性和不均匀的分布，其中外生是硬鳃海鞘的常见现象。在最丰富的物种 Molgula pedunculata 和 Cnemidocarpa verrucosa 中发现了茎发育的差异。冰作用可能是决定所有采样站15 m以上无海鞘的主要因素。
Certain physical factors, substrate type and ice action appear to be important determinants for ascidian distribution. Three different substrate types were sampled at depths between 0–30 m by SCUBA diving: soft bottoms, hard bottoms and moraine deposits. The species found were Aplidium radiatum, Synoicum adareanum, Distaplia cylindrica, Sycozoa gaimardi, Sycozoa sigillinoides, Tylobranchion speciosum, Corella eumyota, Ascidia challengeri, Cnemidocarpa verrucosa, Styela wandeli, Dicarpa insinuosa, Pyura bouvetensis, Pyura discoveryi, Pyura obesa, Pyura setosa, Molgula enodis and Molgula pedunculata. Highest diversity and patchy distribution was found in less stringent environments, where epibiosis is a commmon phenomenon on stolidobranch ascidians. Differences in stalk development were found in the most abundant species Molgula pedunculata and Cnemidocarpa verrucosa. Ice action may be the main factor that determines the absence of ascidians above 15 m in all the stations sampled.