Gawinski Christine, Huwer Bastian, Munk Peter, Jaspers Cornelia
National Institute of Aquatic Resources, Technical University of Denmark, DTU Aqua, Denmark.
GEOMAR - Helmholtz Centre for Ocean Research Kiel, Evolutionary Marine Ecology, Germany.
Data Brief. 2019 Jul 9;25:104186. doi: 10.1016/j.dib.2019.104186. eCollection 2019 Aug.
This article describes the biodiversity of gelatinous macrozooplankton and presents quantitative field data on their community composition and distribution pattern in the North Sea during August 2018. The data set consists of jellyfish and comb jelly species abundance estimates which are based on sampling at 62 stations in the central and southern North Sea covering Danish waters, the German Bight, waters off the Dutch coast as well as the western North Sea off the UK coast and the central North Sea. The sampling gear was a 13 m long MIK-net (modified Methot Isaac Kidd net; Ø 2 m, mesh size 1 mm, mesh size cod end 500 μm) deployed in double oblique hauls from the surface to 5 m above the sea floor. Samples were visually analysed for gelatinous macrozooplankton (>2 mm) using a light table. Samples were processed within 1 hour after catch. In total, 6239 gelatinous macrozooplankton specimen were caught. Spatial distribution pattern described in this article include the jellyfish species sp, , sp., , , , , , , , sp as well as the comb jelly species and . Further, size frequency distributions of abundant taxa are provided together with a summary of abundances as well as average, maximum and minimum sizes of all species. This dataset has not previously been published and is of high value for comparison with other - and future - investigations of gelatinous macrozooplankton in the North Sea. The data were obtained during an internationally coordinated, standard fishery survey which is carried out annually (Quarter 3 - North Sea - International Bottom Trawl Survey - Q3 NS-IBTS). The gained information could be used as baseline for a monitoring of potential changes in gelatinous macrozooplankton abundances to address the long standing question if gelatinous zooplankton are on the rise due to climate change induced stressors.
本文描述了大型凝胶状浮游动物的生物多样性，并给出了2018年8月北海海域其群落组成和分布模式的定量实地数据。数据集包括水母和栉水母物种丰度估计值，这些估计值基于在北海中部和南部62个站点的采样，采样区域覆盖丹麦海域、德国湾、荷兰海岸附近海域、英国海岸附近的北海西部以及北海中部。采样设备是一个13米长的MIK网（改良的梅索特·艾萨克·基德网；直径2米，网目尺寸1毫米，网囊网目尺寸500微米），以双斜拖方式从海面拖至海底上方5米处。使用灯箱对样本进行目视分析，以确定大型凝胶状浮游动物（>2毫米）的种类。样本在捕获后1小时内进行处理。总共捕获了6239个大型凝胶状浮游动物标本。本文描述的空间分布模式包括水母物种、、、、、、、、、以及栉水母物种和。此外，还提供了优势类群的大小频率分布，以及所有物种的丰度总结、平均大小、最大大小和最小大小。该数据集此前未曾发表，对于与北海其他及未来的大型凝胶状浮游动物调查进行比较具有很高的价值。这些数据是在一项国际协调的年度标准渔业调查（第三季度 - 北海 - 国际底拖网调查 - Q3 NS - IBTS）期间获得的。所获得的信息可作为监测大型凝胶状浮游动物丰度潜在变化的基线，以解决长期存在的问题，即凝胶状浮游动物是否因气候变化引发的压力因素而呈上升趋势。
