Published Data Library (PDL)

SSB Benthic macrofaunal activity under climate change (DY008)

Title

Quantification of macrofaunal activity under climate change scenarios from RRS Discovery cruise DY008.

Author(s) Godbold J.A. (1); Hale R. (1)

(1) University of Southampton School of Ocean and Earth Science

Subject biota, geoscientificInformation, oceans, environment
Abstract

This data set contains incubations with sediment cores to assess climate change on macrofaunal activity in the Celtic Sea. The data were collected between 1st April 2014 – 31st October 2014 on board the RRS Discovery cruise DY008 and subsequent mesocosm incubation at the Biodiversity Ecosystem Futures Facility (BEFF) at the National Oceanography Centre, Southampton (University of Southampton). The authors do not have any concerns over the quality of the data set and values are consistent with similar data reported in the wider literature. Replicate sediment cores (n = 10) of size 20 cm by 20 cm and depth 12 cm were collected from NIOZ cores taken at 4 sites (Muddy, site A; Sandy Mud, site G; Muddy Sand, site H; and Sand, site I) in the Celtic Sea. These sediment cores were transferred to clear perspex mesocosms and at the end of the cruise, all aquaria were transferred to and maintained in the BEFF for a 6 month incubation. Five cores from each site were allocated to one of two scenarios: ambient or future conditions. In the BEFF aquaria were held in large water bath tanks in the dark, representative of bottom conditions in the Celtic Sea, and continually aerated by bubbling either ambient air or a treatment specific air-CO2 gas mixture through a glass pipette. Aquaria receiving ambient environmental conditions were held at 10.92 +/- 0.40 degrees C (approximating the mean annual bottom temperature in the Celtic Sea) and 391.07 +/- 0.05 ppm atmospheric [CO2]. Aquaria receiving an environment representative of future climate conditions were held at ambient+4 degrees C (14.56 +/- 0.20 degrees C) and 1026 +/- 0.24 ppm atmospheric [CO2]. Levels of [CO2] were controlled using a CO2-air mixing which maintained and monitored the supply of the air mixture to each aquarium using infrared gas analysers (Licor LI-840A, 1 per CO2 treatment). After 6 months, luminophores, coloured sand (pink) which fluoresces under ultra-violet light, were added to assess bioturbation. The mesocosms were then inoculated with sodium bromide to enable bioirrigation analysis. Sediments were analysed for pH, temperature, salinity, alkalinity and inorganic nutrients (ammonium (NH4-N), nitrite + nitrate (NOx-N) and phosphate (PO4-P)), bicarbonate (H2CO3-), carbonate (CO32-) and pCO2, particle size, percentage organic carbon content, faunal mediated sediment particle reworking and faunal abundance, biomass and functional trait composition. The data were collected as part of the Shelf Sea Biogeochemistry (SSB) research programme as part of the Biogeochemistry, Macronutrient and Carbon Cycling in the benthic layer (BMCC) research programme. SSB was co-funded by the Natural Environment Research Council (NERC) and the Department for Environment, Food and Rural Affairs (Defra). The programme took a holistic approach to the cycling of nutrients and carbon and the controls on primary and secondary production in UK and European shelf seas, to increase understanding of these processes and their role in wider biogeochemical cycles. The British Oceanographic Data Centre (BODC) created the metadata entry and is responsible for holding master copies of the data.

Temporal coverage 01 April 2014 - 31 October 2014
Spatial coverage Celtic Sea
File format Image, Delimited, Documents
Language English
Discovery metadata record Link to the related European Directory of Marine Environmental Data (EDMED) record
Publisher British Oceanographic Data Centre - Natural Environment Research Council, UK
Publication date 07 June 2017
Digital Object Identifier (DOI) doi:10.5285/47634703-04c9-31e5-e053-6c86abc046e3
Short DOI doi:10/b8ds
Citation text Godbold J.A.; Hale R. (2017). Quantification of macrofaunal activity under climate change scenarios from RRS Discovery cruise DY008. British Oceanographic Data Centre - Natural Environment Research Council, UK. doi:10/b8ds.

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