Hanz, Ulrike; Mienis, Furu; Riekenberg, Philip (2020): Isotope data of deep sea fauna, organic matter and sediment of a sponge ground on an Arctic North Atlantic seamount [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.923765
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Abstract:
Sponge grounds are hotspots of biomass and biodiversity in the otherwise barren deep sea. It remains unknown how these ecosystems can thrive in such food limited environments, since organic matter settling from the surface ocean covers only small parts of their carbon demand. In this study, the food-web interactions and potential food sources of a North Atlantic deep-sea sponge reef were identified by bulk and compound-specific stable isotope analysis of amino and fatty acids. The elevated bulk δ15N values of sponges with relatively low abundance of associated microbes (LMA) is in line with a position at the top of the benthic food web, while the relatively high δ13C and intermediate δ15N values of high microbial abundance (HMA) sponges suggest considerable reliance on an alternate resource. Trophic positions based on amino acid δ15N values placed HMA sponges at the base of the food web. Fatty acid analysis of δ13C indicated transfer of sponge derived organic matter to the wider food web. Our results show that sponges drive both bottom-up and top-down processes, shunting organic carbon to higher trophic levels that would otherwise be inaccessible to other fauna. In this way, sponges are key to the sustenance of thriving deep-sea ecosystems.
Related to:
Hanz, Ulrike; Riekenberg, Philip; de Kluijver, Anna; van der Meer, Marcel T J; Middelburg, Jack J; de Goeij, Jasper M; Bart, Martijn C; Wurz, Erik; Colaço, Ana; Duineveld, Gerard C A; Reichart, Gert-Jan; Rapp, Hans Tore; Mienis, Furu (accepted): The important role of sponges in carbon and nitrogen cycling in a deep-sea biological hotspot. Functional Ecology
Project(s):
Funding:
Horizon 2020 (H2020), grant/award no. 679849: Deep-sea Sponge Grounds Ecosystems of the North Atlantic
Coverage:
Median Latitude: 45.901157 * Median Longitude: 34.664478 * South-bound Latitude: 5.562300 * West-bound Longitude: 7.442300 * North-bound Latitude: 73.982650 * East-bound Longitude: 73.830200
Date/Time Start: 2016-06-20T15:34:00 * Date/Time End: 2018-08-06T07:10:00
Event(s):
GS2016109A-07-LAN-01 * Latitude: 73.816000 * Longitude: 7.523470 * Date/Time: 2016-06-20T22:25:00 * Elevation: -669.0 m * Location: Schultz Bank * Campaign: GS2016109A (GS16A-202) * Basis: G. O. Sars (2003) * Method/Device: Bottom lander (B_LANDER) * Comment: deployment
GS2017110-17-LAN-04 * Latitude: 73.816000 * Longitude: 7.523467 * Date/Time: 2017-07-27T11:10:00 * Elevation: -663.0 m * Location: Schultz Bank * Campaign: GS2017110 * Basis: G. O. Sars (2003) * Method/Device: Bottom lander (B_LANDER) * Comment: Retrievement of lander from 2016
GS2017110-18-ROV9 * Latitude: 73.815000 * Longitude: 7.442300 * Date/Time: 2017-07-27T07:17:00 * Elevation: -1037.0 m * Location: Schultz Bank * Campaign: GS2017110 * Basis: G. O. Sars (2003) * Method/Device: Remote operated vehicle (ROV) * Comment: Deployment of two in situ chambers at 1037 m. Video and ROVmultibeam along trawl track as well as on each side of track. Ref to sampling info from 2014 and preliminary list of taxa and video from ROV 8-2017
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
2 datasets
Download Data
Datasets listed in this bundled publication
- Hanz, U; Mienis, F; Riekenberg, P (2020): Amino acid isotope data of deep sea fauna, organic matter and sediment of a sponge ground on an Arctic North Atlantic seamount. https://doi.org/10.1594/PANGAEA.923764
- Hanz, U; Mienis, F; Riekenberg, P (2020): Bulk isotope data of deep sea fauna, organic matter and sediment of a sponge ground on an Arctic North Atlantic seamount. https://doi.org/10.1594/PANGAEA.923749