Name: Cape Canyon Suspended Particulate Matter CTD water sample
License: https://creativecommons.org/licenses/by-nc-sa/4.0/

DOI: 10.15493/DEA.MIMS.12652023

Title	Cape Canyon Suspended Particulate Matter CTD water sample
Project	Cape Canyon Exploration
Authors	Zoleka Filander Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Scientist; contact details: 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, email: zfilander@dffe.gov.za Tarron Lamont Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Specialist Scientist; contact details: 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, email: tlamont@dffe.gov.za
Publisher	Department of Forestry, Fisheries and the Environment (2024)
Contributors	Project Member: Eleonora Puccinelli Department of Coastal Systems, Royal Netherlands Institute for Sea Research (NIOZ); role: Scientist; contact details: Texel, The Netherlands, email: eleonora.puccinelli@nioz.nl Contact Person: Zoleka Filander Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Scientist; contact details: 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, email: zfilander@dffe.gov.za
Abstract	The Cape Canyon, situated on the western continental shelf of South Africa, stands as the country's largest bathymetric feature. Despite its prominence, understanding of the food web dynamics within the system and the significance of the benthic community for higher trophic levels remains incomplete. In response to this knowledge gap, the DFFE: Oceans and Coasts launched a multidisciplinary expedition aboard the RV Algoa. The expedition aimed to characterise the physical environment and investigate food web connections in the vicinity of the Cape Canyon by analysing isotopic signatures in suspended particulate matter (SPM) relative to those found in benthic tissue samples. Prior to dredge operations, conductivity, temperature, and depth (CTD) water samples were collected at each dredge station. However, due to the inherent challenges associated with sampling in canyon systems, not all dredge operations were successful in obtaining samples, resulting in an unbalanced design where the number of CTD stations did not correspond with the dredge samples. Consequently, SPM was collected at 26 stations, comprising 14 non-canyon and 12 canyon stations.
Methods	At each CTD station, SPM water samples were collected at the surface, thermocline and bottom, using remotely-fired Niskin bottles. Three replicates of 4L each, were collected from each depth (surface, thermocline, and bottom) at each station. Seawater samples were shaken to ensure homogeneity, then filtered gently (< 5cm Hg vacuum) onto pre-combusted (450°C for 5 hours) GF/F filters (0.7μm nominal pore size, 47mm diameter).
Data	Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) Cite 10.15493/DEA.MIMS.12652023 Style Terms of use These data are made available with the express understanding that any such use will properly acknowledge the originator(s) and publisher and cite the accession numbers and/or associated Digital Object Identifiers. Anyone wishing to use these data should properly cite and attribute the data providers listed as authors in the metadata provided with each dataset. It is expected that all the conditions of the data license will be strictly honoured. Use of any material herein should be properly cited using the dataset’s persistent identifiers such as accession numbers and DOIs. I agree to the terms of use
Temporal extent	07 Mar 2017 – 16 Mar 2017
Geographic extent	South East Atlantic North: -32.163 South: -33.698 West: 17.065 East: 18.283
Vertical extent	Max: -4 m Min: -656 m
Keywords	canyon, oceanographic processes, SOUTH ATLANTIC OCEAN, Stable isotope, suspended organic matter
Related resources	This digital object is referenced by https://doi.org/10.3389/fmars.2022.1025113

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