Depth and basin shape constrain ecosystem metabolism in lakes dominated by benthic primary producers
Metabolism is one of the most fundamental ecosystem processes, but the drivers of variation in metabolic rates among lakes dominated by benthic primary producers remain poorly constrained. Here, we report the magnitudes and potential drivers of whole-lake metabolism across 43 Swedish arctic–alpine l...
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Umeå universitet, Institutionen för ekologi, miljö och geovetenskap
2022
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-198783 https://doi.org/10.1002/lno.12236 |
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ftumeauniv:oai:DiVA.org:umu-198783 2023-10-09T21:49:17+02:00 Depth and basin shape constrain ecosystem metabolism in lakes dominated by benthic primary producers Klaus, Marcus Verheijen, Hendricus A. Karlsson, Jan Seekell, David A. 2022 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-198783 https://doi.org/10.1002/lno.12236 eng eng Umeå universitet, Institutionen för ekologi, miljö och geovetenskap Association for the Sciences of Limnology and Oceanography Limnology and Oceanography, 0024-3590, 2022, 67:12, s. 2763-2778 orcid:0000-0003-0747-3524 orcid:0000-0002-2858-6299 orcid:0000-0001-5730-0694 orcid:0000-0001-6700-6149 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-198783 doi:10.1002/lno.12236 ISI:000864192700001 Scopus 2-s2.0-85139442695 info:eu-repo/semantics/openAccess Environmental Sciences Miljövetenskap Physical Geography Naturgeografi Article in journal info:eu-repo/semantics/article text 2022 ftumeauniv https://doi.org/10.1002/lno.12236 2023-09-22T13:58:32Z Metabolism is one of the most fundamental ecosystem processes, but the drivers of variation in metabolic rates among lakes dominated by benthic primary producers remain poorly constrained. Here, we report the magnitudes and potential drivers of whole-lake metabolism across 43 Swedish arctic–alpine lakes, based on the free-water diel oxygen technique with sondes deployed during the open-water season near the surface and bottom of the lakes. Gross primary production (GPP) and ecosystem respiration (R) were strongly coupled and ranged from 0.06 to 0.45 mg and 0.05 to 0.43 mg L−1 d−1 among lakes. On average, GPP and R decreased eightfold from relatively shallow to deep lakes (mean depth 0.5–10.9 m) and twofold from concave to convex lakes (mean depth: maximum depth 0.2–0.5). We attribute this to light limitation and shape-specific sensitivity of benthic GPP to disturbance by lake ice. Net ecosystem production (GPP-R) ranged from −0.09 to 0.14 mg L−1 d−1 and switched, on average, from positive to negative towards deeper lakes and lakes richer in dissolved organic carbon (DOC; 0.5–7.4 mg DOC L−1). Uncertainties in metabolism estimates were high (around one and three times mean R and GPP), especially in deep lakes with low insulation and diurnally variable wind speed. Our results confirm the role of DOC in stimulating net heterotrophy and highlight novel effects of lake shape on productivity in benthic-dominated lake ecosystems and its response to changes in lake ice cover. Originally included in thesis in manuscript form. Article in Journal/Newspaper Arctic Umeå University: Publications (DiVA) Arctic Limnology and Oceanography 67 12 2763 2778 |
institution |
Open Polar |
collection |
Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
Environmental Sciences Miljövetenskap Physical Geography Naturgeografi |
spellingShingle |
Environmental Sciences Miljövetenskap Physical Geography Naturgeografi Klaus, Marcus Verheijen, Hendricus A. Karlsson, Jan Seekell, David A. Depth and basin shape constrain ecosystem metabolism in lakes dominated by benthic primary producers |
topic_facet |
Environmental Sciences Miljövetenskap Physical Geography Naturgeografi |
description |
Metabolism is one of the most fundamental ecosystem processes, but the drivers of variation in metabolic rates among lakes dominated by benthic primary producers remain poorly constrained. Here, we report the magnitudes and potential drivers of whole-lake metabolism across 43 Swedish arctic–alpine lakes, based on the free-water diel oxygen technique with sondes deployed during the open-water season near the surface and bottom of the lakes. Gross primary production (GPP) and ecosystem respiration (R) were strongly coupled and ranged from 0.06 to 0.45 mg and 0.05 to 0.43 mg L−1 d−1 among lakes. On average, GPP and R decreased eightfold from relatively shallow to deep lakes (mean depth 0.5–10.9 m) and twofold from concave to convex lakes (mean depth: maximum depth 0.2–0.5). We attribute this to light limitation and shape-specific sensitivity of benthic GPP to disturbance by lake ice. Net ecosystem production (GPP-R) ranged from −0.09 to 0.14 mg L−1 d−1 and switched, on average, from positive to negative towards deeper lakes and lakes richer in dissolved organic carbon (DOC; 0.5–7.4 mg DOC L−1). Uncertainties in metabolism estimates were high (around one and three times mean R and GPP), especially in deep lakes with low insulation and diurnally variable wind speed. Our results confirm the role of DOC in stimulating net heterotrophy and highlight novel effects of lake shape on productivity in benthic-dominated lake ecosystems and its response to changes in lake ice cover. Originally included in thesis in manuscript form. |
format |
Article in Journal/Newspaper |
author |
Klaus, Marcus Verheijen, Hendricus A. Karlsson, Jan Seekell, David A. |
author_facet |
Klaus, Marcus Verheijen, Hendricus A. Karlsson, Jan Seekell, David A. |
author_sort |
Klaus, Marcus |
title |
Depth and basin shape constrain ecosystem metabolism in lakes dominated by benthic primary producers |
title_short |
Depth and basin shape constrain ecosystem metabolism in lakes dominated by benthic primary producers |
title_full |
Depth and basin shape constrain ecosystem metabolism in lakes dominated by benthic primary producers |
title_fullStr |
Depth and basin shape constrain ecosystem metabolism in lakes dominated by benthic primary producers |
title_full_unstemmed |
Depth and basin shape constrain ecosystem metabolism in lakes dominated by benthic primary producers |
title_sort |
depth and basin shape constrain ecosystem metabolism in lakes dominated by benthic primary producers |
publisher |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
publishDate |
2022 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-198783 https://doi.org/10.1002/lno.12236 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Limnology and Oceanography, 0024-3590, 2022, 67:12, s. 2763-2778 orcid:0000-0003-0747-3524 orcid:0000-0002-2858-6299 orcid:0000-0001-5730-0694 orcid:0000-0001-6700-6149 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-198783 doi:10.1002/lno.12236 ISI:000864192700001 Scopus 2-s2.0-85139442695 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/lno.12236 |
container_title |
Limnology and Oceanography |
container_volume |
67 |
container_issue |
12 |
container_start_page |
2763 |
op_container_end_page |
2778 |
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