Benthic resources are the key to Daphnia middendorffiana survival in a high arctic pond
Summary 1. Shallow arctic lakes and ponds have simple and short food webs, but large uncertainties remain about benthic–pelagic links in these systems. We tested whether organic matter of benthic origin supports zooplankton biomass in a pond in NE Greenland, using stable isotope analysis of carbon a...
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crwiley:10.1111/j.1365-2427.2011.02722.x 2024-06-02T08:01:28+00:00 Benthic resources are the key to Daphnia middendorffiana survival in a high arctic pond CAZZANELLI, MATTEO FORSSTRÖM, LAURA RAUTIO, MILLA MICHELSEN, ANDERS CHRISTOFFERSEN, KIRSTEN S. 2011 http://dx.doi.org/10.1111/j.1365-2427.2011.02722.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2427.2011.02722.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2427.2011.02722.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Freshwater Biology volume 57, issue 3, page 541-551 ISSN 0046-5070 1365-2427 journal-article 2011 crwiley https://doi.org/10.1111/j.1365-2427.2011.02722.x 2024-05-03T10:35:16Z Summary 1. Shallow arctic lakes and ponds have simple and short food webs, but large uncertainties remain about benthic–pelagic links in these systems. We tested whether organic matter of benthic origin supports zooplankton biomass in a pond in NE Greenland, using stable isotope analysis of carbon and nitrogen in the pond itself and in a 13 C‐enrichment enclosure experiment. In the latter, we manipulated the carbon isotope signature of benthic algae to enhance its isotopic discrimination from other potential food sources for zooplankton. 2. The cladoceran Daphnia middendorffiana responded to the 13 C‐enrichment of benthic mats with progressively increasing δ 13 C values, suggesting benthic feeding. Stable isotope analysis also pointed towards a negligible contribution of terrestrial carbon to the diet of D. middendorffiana . This agreed with the apparent dominance of autochthonous dissolved organic matter in the pond revealed by analysis of coloured dissolved organic matter. 3. Daily net production by phytoplankton in the pond (18 mg C m −2 day −1 ) could satisfy only up to half of the calculated minimum energy requirements of D. middendorffiana (35 mg C m −2 day −1 ), whereas benthic primary production alone (145 mg C m −2 day −1 ) was more than sufficient. 4. Our findings highlight benthic primary production as a major dietary source for D. middendorffiana in this system and suggest that benthic organic matter may play a key role in sustaining pelagic secondary production in such nutrient‐limited high arctic ponds. Article in Journal/Newspaper Arctic Greenland Phytoplankton Zooplankton Wiley Online Library Arctic Greenland Freshwater Biology 57 3 541 551 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Summary 1. Shallow arctic lakes and ponds have simple and short food webs, but large uncertainties remain about benthic–pelagic links in these systems. We tested whether organic matter of benthic origin supports zooplankton biomass in a pond in NE Greenland, using stable isotope analysis of carbon and nitrogen in the pond itself and in a 13 C‐enrichment enclosure experiment. In the latter, we manipulated the carbon isotope signature of benthic algae to enhance its isotopic discrimination from other potential food sources for zooplankton. 2. The cladoceran Daphnia middendorffiana responded to the 13 C‐enrichment of benthic mats with progressively increasing δ 13 C values, suggesting benthic feeding. Stable isotope analysis also pointed towards a negligible contribution of terrestrial carbon to the diet of D. middendorffiana . This agreed with the apparent dominance of autochthonous dissolved organic matter in the pond revealed by analysis of coloured dissolved organic matter. 3. Daily net production by phytoplankton in the pond (18 mg C m −2 day −1 ) could satisfy only up to half of the calculated minimum energy requirements of D. middendorffiana (35 mg C m −2 day −1 ), whereas benthic primary production alone (145 mg C m −2 day −1 ) was more than sufficient. 4. Our findings highlight benthic primary production as a major dietary source for D. middendorffiana in this system and suggest that benthic organic matter may play a key role in sustaining pelagic secondary production in such nutrient‐limited high arctic ponds. |
format |
Article in Journal/Newspaper |
author |
CAZZANELLI, MATTEO FORSSTRÖM, LAURA RAUTIO, MILLA MICHELSEN, ANDERS CHRISTOFFERSEN, KIRSTEN S. |
spellingShingle |
CAZZANELLI, MATTEO FORSSTRÖM, LAURA RAUTIO, MILLA MICHELSEN, ANDERS CHRISTOFFERSEN, KIRSTEN S. Benthic resources are the key to Daphnia middendorffiana survival in a high arctic pond |
author_facet |
CAZZANELLI, MATTEO FORSSTRÖM, LAURA RAUTIO, MILLA MICHELSEN, ANDERS CHRISTOFFERSEN, KIRSTEN S. |
author_sort |
CAZZANELLI, MATTEO |
title |
Benthic resources are the key to Daphnia middendorffiana survival in a high arctic pond |
title_short |
Benthic resources are the key to Daphnia middendorffiana survival in a high arctic pond |
title_full |
Benthic resources are the key to Daphnia middendorffiana survival in a high arctic pond |
title_fullStr |
Benthic resources are the key to Daphnia middendorffiana survival in a high arctic pond |
title_full_unstemmed |
Benthic resources are the key to Daphnia middendorffiana survival in a high arctic pond |
title_sort |
benthic resources are the key to daphnia middendorffiana survival in a high arctic pond |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.1111/j.1365-2427.2011.02722.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2427.2011.02722.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2427.2011.02722.x |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Phytoplankton Zooplankton |
genre_facet |
Arctic Greenland Phytoplankton Zooplankton |
op_source |
Freshwater Biology volume 57, issue 3, page 541-551 ISSN 0046-5070 1365-2427 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2427.2011.02722.x |
container_title |
Freshwater Biology |
container_volume |
57 |
container_issue |
3 |
container_start_page |
541 |
op_container_end_page |
551 |
_version_ |
1800745843536429056 |