...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Microbiology and molecular biology reviews >Bathyal cumacean assemblages from the southern margin of the Cap Ferret Canyon (SE Bay of Biscay)
【24h】

Bathyal cumacean assemblages from the southern margin of the Cap Ferret Canyon (SE Bay of Biscay)

机译：Bathyal cumacean assemblages from the southern margin of the Cap Ferret Canyon (SE Bay of Biscay)

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

The structure of the cumacean assemblages from the southern margin of the Cap Ferret Canyon was studied at 13 stations ranging from 346 to 1099 m depth with a modified Macer-GIROQ suprabenthic sledge (four superimposed nets; 0.5 mm mesh size). A total of 1885 specimens were collected and classified into 5 families and 42 species. The total abundances fluctuated between 2.8 ind./100 m(2) (station TS04; 484-485 m) and 55.8 ind./100 m(2) (station TS08; 714-708 m). The highest values of species richness and diversity were recorded at station TS13 (1097-1099 m): S=25 species; H'(log(2))=4.05. The near-bottom vertical distribution of the cumacean fauna showed the same pattern at all stations: at least 60 of the individuals were sampled by the lower net of the sledge and a drastic abundance decrease occurred between the two lowermost water layers sampled by the sledge. The multivariate analysis carried out on abundance data discriminated three main groups of stations distributed across depth (T509 excluded): group Ia (346-485 m) characterized by the dominance of Nannastacidae (57.2) at family level and Campylaspis sulcata, Leptostylis macntra at species level; group lb (522-714 m) characterized by the dominance of Nannastacidae (66.1) at family level and Campylaspis squamifera, C. laevigata and Leptostylis macrura at species level; and group II (790-1099 m) characterized by the dominance of Diastylidae (40.3) at family level and Makrokylindrus (Adiastylis) josephinae, Leucon (Epileucon) pusillus and Diastyloides serratus at species level. According to this analysis, the main faunal change occurs between group I and II between 714 and 790 m, in relation to changes in the texture of surficial sediments. Although bathyal cumacean assemblages appear to be less abundant than those studied on continental shelves, they are significantly more diverse. However, such results could be in part related to the use of different sampling methods.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号