气候变化领域集成服务门户(CCPortal): Counts of benthos communities in Kongsfjorden in 2009

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.753197
	Counts of benthos communities in Kongsfjorden in 2009
	Laudien; Jürgen; Orchard; Julia-Berenice
发布日期	2012-01-23
数据集类型	dataset
英文简介	In order to reveal the structure of the sparsely known deeper sublittoral hard bottom communities of glacial Kongsfjorden, the macroepibenthos from six depth zones (30-200 m) was analysed. A total of 180 still images derived from 6-h video recorded at the Kongsfjordneset remotely operated vehicle station were assessed quantitatively. Overall 27 mainly suspension-feeding species/taxa were observed. Of these, two-thirds have an arcto-boreal distribution, while the remainder are cosmopolitan. The overall mean epibenthos abundance was 33 ind./m2 with maximum values at 150 m depth (97.9 ind./m2). The majority of the taxa inhabited the entire depth range. Encrusting red algae, an unidentified sponge and the sea anemone Urticina eques, characterized the assemblage of the shallow zone. The sea anemones Hormathia spp. were important below 30 m, the Serpulid polychaete Protula tubularia was characteristic for the community below 50 m and the demosponge Haliclona sp. was a key taxon between 100 and 200 m depth. Cluster analysis and non-metrical multidimensional scaling based on abundance data showed differences between the assemblages along the bathymetric gradient, but only in the shallower depths in relation to the substratum surface incline. As surface and tidal current impacts attenuate with increasing depth, there is a gradual trend from robust key species towards more fragile ones (i.e. P. tubularia), in line with the 'Physical control hypothesis'.
空间范围	Median Latitude: 78.979017 * Median Longitude: 11.486945 * South-bound Latitude: 78.977667 * West-bound Longitude: 11.476867 * North-bound Latitude: 78.980583 * East-bound Longitude: 11.495617
时间范围	2009-06-09T12:00:00 - 2009-06-12T12:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/217814
推荐引用方式 GB/T 7714	Laudien,Jürgen,Orchard,et al. Counts of benthos communities in Kongsfjorden in 2009.2012-01-23.https://doi.org/10.1594/PANGAEA.753197.