Fate of organic matter in Arctic intertidal sediments: is utilisation by meiofauna important?
This paper presents (1) a study of the fate of high-quality detritus in Arctic sandy beaches, in particular its use by the sandy beach meiobenthos, and (2) a comparison of organic matter mineralisation rates with those in other climatic regions. We performed a tracer experiment in which lyophilised...
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Language: | English |
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ftvliz:oai:oma.vliz.be:102811 2023-05-15T14:53:08+02:00 Fate of organic matter in Arctic intertidal sediments: is utilisation by meiofauna important? Urban-Malinga, B. Moens, T. 2006 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=102811 en eng info:eu-repo/semantics/altIdentifier/wos/000241097700003 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.seares.2006.05.003 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=102811 info:eu-repo/semantics/restrictedAccess %3Ci%3EJ.+Sea+Res.+56%283%29%3C%2Fi%3E%3A+239-248.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.seares.2006.05.003%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.seares.2006.05.003%3C%2Fa%3E Arctic zone Beaches Carbon isotopes Fate Meiobenthos Organic matter Sediments PNE Norway Spitsbergen info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2006 ftvliz https://doi.org/10.1016/j.seares.2006.05.003 2022-05-01T08:57:28Z This paper presents (1) a study of the fate of high-quality detritus in Arctic sandy beaches, in particular its use by the sandy beach meiobenthos, and (2) a comparison of organic matter mineralisation rates with those in other climatic regions. We performed a tracer experiment in which lyophilised 13 C-labelled cyanobacteria were added to sediments of two intertidal beaches (Tyskehytte and Breoyane) at Kongsfjorden (Spitsbergen) with contrasting sediment properties, benthic metabolic rates and meiobenthic communities. Tyskehytte was characterised by coarse sands on an exposed beach and Breoyane by medium sands on a relatively sheltered beach. Organic matter addition stimulated benthic metabolism in the coarser sediment but not in the finer one. Correspondingly, the added carbon was metabolised faster in the coarser sediment, respiration being its major short-term fate. Faster mineralisation of organic matter in coarser sediments was probably linked to a better availability to microbes and fauna in deeper sediment strata, resulting from a higher sediment porosity and a faster penetration of (labelled) organic matter to deeper sediment layers. Overall, organic matter mineralisation rates at both beaches compared favourably with those in temperate sediments. All major meiofauna taxa incorporated the added carbon source on both beaches, but specific uptake was substantially higher in the coarser sediment than in the finer one. Oligochaetes accounted for the largest share of meiobenthic carbon uptake. Despite a very high specific uptake, meiofaunal consumption accounted for but a small portion (< 5% at both beaches) of the total 13 C-mineralisation. Thus our results do not support the hypothesis that meiofauna have a comparatively larger role in Arctic sandy beaches impoverished in macrofauna. However, more research including analyses on different spatial and temporal scales is needed before generalisations can be made. Article in Journal/Newspaper Arctic Kongsfjord* Kongsfjorden Spitsbergen Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Arctic Norway Sandy Beach ENVELOPE(-55.731,-55.731,49.917,49.917) Journal of Sea Research 56 3 239 248 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
topic |
Arctic zone Beaches Carbon isotopes Fate Meiobenthos Organic matter Sediments PNE Norway Spitsbergen |
spellingShingle |
Arctic zone Beaches Carbon isotopes Fate Meiobenthos Organic matter Sediments PNE Norway Spitsbergen Urban-Malinga, B. Moens, T. Fate of organic matter in Arctic intertidal sediments: is utilisation by meiofauna important? |
topic_facet |
Arctic zone Beaches Carbon isotopes Fate Meiobenthos Organic matter Sediments PNE Norway Spitsbergen |
description |
This paper presents (1) a study of the fate of high-quality detritus in Arctic sandy beaches, in particular its use by the sandy beach meiobenthos, and (2) a comparison of organic matter mineralisation rates with those in other climatic regions. We performed a tracer experiment in which lyophilised 13 C-labelled cyanobacteria were added to sediments of two intertidal beaches (Tyskehytte and Breoyane) at Kongsfjorden (Spitsbergen) with contrasting sediment properties, benthic metabolic rates and meiobenthic communities. Tyskehytte was characterised by coarse sands on an exposed beach and Breoyane by medium sands on a relatively sheltered beach. Organic matter addition stimulated benthic metabolism in the coarser sediment but not in the finer one. Correspondingly, the added carbon was metabolised faster in the coarser sediment, respiration being its major short-term fate. Faster mineralisation of organic matter in coarser sediments was probably linked to a better availability to microbes and fauna in deeper sediment strata, resulting from a higher sediment porosity and a faster penetration of (labelled) organic matter to deeper sediment layers. Overall, organic matter mineralisation rates at both beaches compared favourably with those in temperate sediments. All major meiofauna taxa incorporated the added carbon source on both beaches, but specific uptake was substantially higher in the coarser sediment than in the finer one. Oligochaetes accounted for the largest share of meiobenthic carbon uptake. Despite a very high specific uptake, meiofaunal consumption accounted for but a small portion (< 5% at both beaches) of the total 13 C-mineralisation. Thus our results do not support the hypothesis that meiofauna have a comparatively larger role in Arctic sandy beaches impoverished in macrofauna. However, more research including analyses on different spatial and temporal scales is needed before generalisations can be made. |
format |
Article in Journal/Newspaper |
author |
Urban-Malinga, B. Moens, T. |
author_facet |
Urban-Malinga, B. Moens, T. |
author_sort |
Urban-Malinga, B. |
title |
Fate of organic matter in Arctic intertidal sediments: is utilisation by meiofauna important? |
title_short |
Fate of organic matter in Arctic intertidal sediments: is utilisation by meiofauna important? |
title_full |
Fate of organic matter in Arctic intertidal sediments: is utilisation by meiofauna important? |
title_fullStr |
Fate of organic matter in Arctic intertidal sediments: is utilisation by meiofauna important? |
title_full_unstemmed |
Fate of organic matter in Arctic intertidal sediments: is utilisation by meiofauna important? |
title_sort |
fate of organic matter in arctic intertidal sediments: is utilisation by meiofauna important? |
publishDate |
2006 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=102811 |
long_lat |
ENVELOPE(-55.731,-55.731,49.917,49.917) |
geographic |
Arctic Norway Sandy Beach |
geographic_facet |
Arctic Norway Sandy Beach |
genre |
Arctic Kongsfjord* Kongsfjorden Spitsbergen |
genre_facet |
Arctic Kongsfjord* Kongsfjorden Spitsbergen |
op_source |
%3Ci%3EJ.+Sea+Res.+56%283%29%3C%2Fi%3E%3A+239-248.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.seares.2006.05.003%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.seares.2006.05.003%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000241097700003 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.seares.2006.05.003 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=102811 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.seares.2006.05.003 |
container_title |
Journal of Sea Research |
container_volume |
56 |
container_issue |
3 |
container_start_page |
239 |
op_container_end_page |
248 |
_version_ |
1766324545236500480 |