Epipelagic mesozooplankton distribution and abundance in Southern Ocean Atlantic sector and the North Atlantic and Arctic 1996-2013 ...

• Main Authors: Ward, Peter, Tarling, Geraint, Shreeve, Rachael, ten Hoopen, Petra
• Format: Dataset
• Language: English
• Published: UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation 2020
• Subjects: "EARTH SCIENCE","BIOSPHERE","ECOLOGICAL DYNAMICS","COMMUNITY DYNAMICS","BIODIVERSITY FUNCTIONS"; "EARTH SCIENCE","BIOSPHERE","ECOSYSTEMS","AQUATIC ECOSYSTEMS","PLANKTON","ZOOPLANKTON"; "EARTH SCIENCE","OCEANS","MARINE ENVIRONMENT MONITORING"; Amphipods; Chaetognaths; Copepods; Euphausiids; Polychaetes; Arctic; Atlantic Arctic; Atlantic-Arctic; North Atlantic; Southern Ocean; Zooplankton
• Online Access: https://dx.doi.org/10.5285/5a711904-ef42-46a3-9f47-3f0d6b231f65; https://data.bas.ac.uk/full-record.php?id=GB/NERC/BAS/PDC/01316

Mesozooplankton were collected with a motion-compensated Bongo net (61 cm mouth diameter, 100 and 200 micrometre meshes) and a mini- Bongo net (18 cm mouth diameter, 50 micrometre mesh nets). Both nets fished to a maximum depth of 400 m but sometimes shallower. Specimens were categorised to the lowest possible taxonomic level, which in some cases encompassed developmental stages but in other cases was limited to higher order taxa. Each taxa was enumerated to determine abundance in units of individuals m-2. The dataset allows examination of the distribution and abundance of these species within the Atlantic sector of the Southern Ocean over a number of years and covering much of the productive season from spring to autumn. The data for the North Atlantic and Arctic covers one season only (summer) and is limited to providing a spatial perspective on the distribution and abundance of mesozooplankton. ... : Data were gathered on a series of oceanographic cruises aboard the RRS James Clark Ross during expeditions to the Atlantic Sector of the Southern Ocean and the North Atlantic/Arctic. Samples were retrieved by either a motion compensation Bongo net or a mini Bongo net, and then preserved with Borax buffered 10% formalin for analysis back at the home laboratory. Taxa were identified through examination by light microscopy. The abundance of each taxa within a sample was determined through examining a known fraction of the sample and then making an inverse multiplication of that fraction. Known fractions were principally achieved through the use of a Folsom splitter. Volumetric abundances (individuals m-2) were determined through dividing sample abundance by the volume of water sampled by the respective net. Net volume was mainly derived through multiplying the net opening diameter by the maximum depth of sampling. This calculation assumes 100% net sampling efficiency and that specimens were only captured during ...