Local effects of large food-falls on nematode diversity at an arctic deep-sea site: results from an in situ experiment at the deep-sea observatory HAUSGARTEN
To study the response of the smaller benthic biota to larger food-falls and their possible effects on the biodiversity at the deep seafloor, we deployed the halves of a sagittally bisected porpoise (1.3 m in length: each half approximately 18 kg) at 2500 m and 5400 m water depth at the LTER (Long-Te...
Published in: | Journal of Experimental Marine Biology and Ecology |
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Language: | English |
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2018
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Online Access: | https://www.vliz.be/imisdocs/publications/313302.pdf |
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ftvliz:oai:oma.vliz.be:295432 2023-05-15T15:09:54+02:00 Local effects of large food-falls on nematode diversity at an arctic deep-sea site: results from an in situ experiment at the deep-sea observatory HAUSGARTEN Soltwedel, T. Guilini, K. Sauter, E. Schewe, I. Hasemann, C. 2018 application/pdf https://www.vliz.be/imisdocs/publications/313302.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000430034100013 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.jembe.2017.03.002 https://www.vliz.be/imisdocs/publications/313302.pdf info:eu-repo/semantics/openAccess %3Ci%3EJ.+Exp.+Mar.+Biol.+Ecol.+502%3C%2Fi%3E%3A+129-141.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.jembe.2017.03.002%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.jembe.2017.03.002%3C%2Fa%3E Nematoda [Nematodes] info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftvliz https://doi.org/10.1016/j.jembe.2017.03.002 2022-05-01T10:59:29Z To study the response of the smaller benthic biota to larger food-falls and their possible effects on the biodiversity at the deep seafloor, we deployed the halves of a sagittally bisected porpoise (1.3 m in length: each half approximately 18 kg) at 2500 m and 5400 m water depth at the LTER (Long-Term Ecological Research) observatory HAUSGARTEN in the eastem Fram Strait. Five weeks after the porpoise deployment, sediments beneath the carcasses and at different distances (0, 20, 40 cm) from these artificial food-falls were sampled with push-corers handled by a Remotely Operated Vehicle. The samples provided empirical evidence for a quick response by sediment-inhabiting bacteria and metazoan meiofauna to the carcasses at both water depths. Compared to control sediments, the substantial pulse of organic matter also led to generally increased meiofauna/nematode densities around the artificial food-falls. The comparison of nematode communities in sediments affected by the carcasses with those in control sediments exhibited shifts in the structural composition and the associated trophic and functional diversity of the nematodes. Our results confirmed that the impact of large food-falls on the deep benthic community largely depend on environmental factors (water depth, alternative food sources) as well as the background species composition, i.e., the structure of the prevailing meiofauna/nematode assemblages and the composition of the necrophagous community present in the wider area. Article in Journal/Newspaper Arctic Fram Strait Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Arctic Journal of Experimental Marine Biology and Ecology 502 129 141 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
topic |
Nematoda [Nematodes] |
spellingShingle |
Nematoda [Nematodes] Soltwedel, T. Guilini, K. Sauter, E. Schewe, I. Hasemann, C. Local effects of large food-falls on nematode diversity at an arctic deep-sea site: results from an in situ experiment at the deep-sea observatory HAUSGARTEN |
topic_facet |
Nematoda [Nematodes] |
description |
To study the response of the smaller benthic biota to larger food-falls and their possible effects on the biodiversity at the deep seafloor, we deployed the halves of a sagittally bisected porpoise (1.3 m in length: each half approximately 18 kg) at 2500 m and 5400 m water depth at the LTER (Long-Term Ecological Research) observatory HAUSGARTEN in the eastem Fram Strait. Five weeks after the porpoise deployment, sediments beneath the carcasses and at different distances (0, 20, 40 cm) from these artificial food-falls were sampled with push-corers handled by a Remotely Operated Vehicle. The samples provided empirical evidence for a quick response by sediment-inhabiting bacteria and metazoan meiofauna to the carcasses at both water depths. Compared to control sediments, the substantial pulse of organic matter also led to generally increased meiofauna/nematode densities around the artificial food-falls. The comparison of nematode communities in sediments affected by the carcasses with those in control sediments exhibited shifts in the structural composition and the associated trophic and functional diversity of the nematodes. Our results confirmed that the impact of large food-falls on the deep benthic community largely depend on environmental factors (water depth, alternative food sources) as well as the background species composition, i.e., the structure of the prevailing meiofauna/nematode assemblages and the composition of the necrophagous community present in the wider area. |
format |
Article in Journal/Newspaper |
author |
Soltwedel, T. Guilini, K. Sauter, E. Schewe, I. Hasemann, C. |
author_facet |
Soltwedel, T. Guilini, K. Sauter, E. Schewe, I. Hasemann, C. |
author_sort |
Soltwedel, T. |
title |
Local effects of large food-falls on nematode diversity at an arctic deep-sea site: results from an in situ experiment at the deep-sea observatory HAUSGARTEN |
title_short |
Local effects of large food-falls on nematode diversity at an arctic deep-sea site: results from an in situ experiment at the deep-sea observatory HAUSGARTEN |
title_full |
Local effects of large food-falls on nematode diversity at an arctic deep-sea site: results from an in situ experiment at the deep-sea observatory HAUSGARTEN |
title_fullStr |
Local effects of large food-falls on nematode diversity at an arctic deep-sea site: results from an in situ experiment at the deep-sea observatory HAUSGARTEN |
title_full_unstemmed |
Local effects of large food-falls on nematode diversity at an arctic deep-sea site: results from an in situ experiment at the deep-sea observatory HAUSGARTEN |
title_sort |
local effects of large food-falls on nematode diversity at an arctic deep-sea site: results from an in situ experiment at the deep-sea observatory hausgarten |
publishDate |
2018 |
url |
https://www.vliz.be/imisdocs/publications/313302.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Fram Strait |
genre_facet |
Arctic Fram Strait |
op_source |
%3Ci%3EJ.+Exp.+Mar.+Biol.+Ecol.+502%3C%2Fi%3E%3A+129-141.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.jembe.2017.03.002%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.jembe.2017.03.002%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000430034100013 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.jembe.2017.03.002 https://www.vliz.be/imisdocs/publications/313302.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.jembe.2017.03.002 |
container_title |
Journal of Experimental Marine Biology and Ecology |
container_volume |
502 |
container_start_page |
129 |
op_container_end_page |
141 |
_version_ |
1766341001586147328 |