LSL2002-23 Macrofauna Data. Version 1.0

This dataset investigates the macrobenthos of the Canada Basin, which is one of the biologically least known areas of the Arctic deep sea. Macro-infauna was collected with 11 box cores at six stations ranging from 640 to 3250 m water depth between 16 August 2002 and 5 September 2002. Total abundance ranged from 3 to 265 individuals per 0.04 square meters (75 - 6625 individuals per square meter) and decreased with increasing depth. Biomass ranged from 0.04 to 228 mg wet weight per 0.04 m2 (1-5700 mg wet weight per square meter) and followed the same trend. Polychaetes, crustaceans and bivalves dominated the faunal densities, biomass and species numbers. Over 70 benthic invertebrate species from four biogeographic affinities were identified, including at least three new species of Isopoda. The evident low abundances and biomass are in agreement with findings from the Eurasian Arctic deep sea. This dataset is part of the Pacific Marine Arctic Regional Synthesis (PacMARS) Project. This data set is in Excel format, and presents the foundation for a scientific publication: Bluhm BA, MacDonald IR, Debenham C, Iken K (2005) "Macro- and megabenthic communities in the high Arctic Canada Basin: initial findings." Polar Biology (spec. issue) 28:218-231. Taxonomists that assisted with species identifications are listed in the publication. This data set has the unique catalog number 2005B1. This data set contains the raw counts for each box core replicate sample, mostly per 0.04 m2. In most cases, no replicates could be obtained due to time constraints. Limited environmental data as well as mean station totals of abundance and biomass are in the related publication. This dataset is not currently available online. For more information, email the point of contact.

本数据集针对加拿大海盆（Canada Basin）的大型底栖生物（macrobenthos）展开研究，该区域是北极深海中生物多样性认知最匮乏的区域之一。2002年8月16日至9月5日期间，研究人员在水深640至3250米的6个站位，通过11个箱式采泥器（box cores）采集大型内栖动物（macro-infauna）样本。总丰度范围为每0.04平方米3至265个个体（即每平方米75至6625个个体），且随水深增加而降低。生物量范围为每0.04平方米0.04至228毫克湿重（即每平方米1至5700毫克湿重），且呈现相同的变化趋势。多毛类（polychaetes）、甲壳类（crustaceans）和双壳类（bivalves）在动物密度、生物量及物种数量中占主导地位。研究识别出70余种来自4个生物地理区系的底栖无脊椎动物，其中包括至少3个等足类（Isopoda）新物种。显著偏低的丰度与生物量，与欧亚北极深海的研究结果一致。本数据集是太平洋海洋北极区域综合（PacMARS）项目的一部分。数据集以Excel格式呈现，是以下科学出版物的基础：Bluhm BA, MacDonald IR, Debenham C, Iken K (2005)《高北极加拿大海盆的大型与巨型底栖生物群落：初步发现》，《极地生物学》（特刊）28:218-231。协助物种鉴定的分类学家名单已在该出版物中列出。本数据集的唯一目录编号为2005B1。数据集包含每个箱式采泥器重复样本的原始计数，大部分为每0.04平方米的计数结果。多数情况下，由于时间限制无法获取重复样本。有限的环境数据以及各站位丰度与生物量的平均总值已收录于相关出版物中。本数据集目前未在线公开。如需更多信息，请发送邮件至联系人。