Structure of the pelagic cnidarian community in Lützow–Holm Bay in the Indian sector of the Southern Ocean
Structure of the pelagic cnidarian community in Lützow–Holm Bay in the Indian sector of the Southern Ocean
复制标题
南大洋印度区吕措夫-霍尔姆湾中上层刺胞动物群落的结构
DOI：
10.1016/j.polar.2010.05.007
复制
发表时间：
2010
期刊：
影响因子：
1.8
通讯作者：
T. Ishimaru
中科院分区：
文献类型：
--
作者：
Ryoji Toda;M. Moteki;Atsushi Ono;N. Horimoto;Yuji Tanaka;T. Ishimaru
2005年1月和2006年1月，对东南极洲印度区吕措-霍尔姆湾的浮游刺胞动物群落结构进行了调查。浮游动物样品从六个离散的深度（表面至2000米）获得使用RMT-8产生4666个个体的31种刺胞动物。2005年的刺胞动物丰度和碳生物量远远高于2006年。2005年大型浮游动物的生物量主要集中在200- 500 m，磷虾除外。优势种为南极Diphyesanarctica，其次为北极Dimophyesarctica和Muggiaeabargmanatica。有四个物种从未在东南极洲被采集到，其中，Solmissus incisa是南大洋的首次记录。聚类分析显示了以下三个主要群落：表层（0- 200米），在夏季表面，冬季，和上部改良的绕极深沃茨（MCDW）;上层中层（200- 500米），在上部MCDW;和较低的中层和深海（500- 2000米），在较低的MCDW。由于自下而上的控制，当初级生产力低时，上层和下层中层和深层群落的丰度/生物量可能减少，而上层中层群落保持稳定。
The structure of the pelagic cnidarian community in Lützow–Holm Bay in the Indian sector of East Antarctica was investigated in January 2005 and 2006. Zooplankton samples from six discrete depths (surface to 2000m) obtained using an RMT-8 yielded 4666 individuals of 31 species of cnidarian. Cnidarian abundance and carbon biomass were far greater in 2005 than in 2006. The biomass of macrozooplankton was large in the upper 200m in 2005, but concentrated at 200–500m in 2006, except for Euphausiacea. The most dominant species was Diphyes antarctica, followed by Dimophyes arctica and Muggiaea bargmannae. Four species had never been collected from East Antarctica; of these, Solmissus incisa was a first record in the Southern Ocean. Cluster analysis revealed the following three major communities: the epipelagic (0–200m), in summer surface, winter, and upper modified circumpolar deep waters (MCDW); the upper mesopelagic (200–500m), in upper MCDW; and the lower meso- and bathypelagic (500–2000m), in lower MCDW. The epipelagic and lower meso- and bathypelagic communities are likely reduced in abundance/biomass when primary production is low, due to bottom-up control, while the upper mesopelagic community remains stable.