Nutrients influence seasonal metabolic patterns and total productivity of Arctic streams
The seasonality of gross primary production (GPP) in streams is driven by multiple physical and chemical factors, yet incident light is often thought to be most important. In Arctic tundra streams, however, light is available in saturating amounts throughout the summer, but sharp declines in nutrien...
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Umeå universitet, Institutionen för ekologi, miljö och geovetenskap
2021
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176077 https://doi.org/10.1002/lno.11614 |
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ftumeauniv:oai:DiVA.org:umu-176077 2023-10-09T21:48:22+02:00 Nutrients influence seasonal metabolic patterns and total productivity of Arctic streams Myrstener, Maria Gómez-Gener, Lluís Rocher-Ros, Gerard Giesler, Reiner Sponseller, Ryan A. 2021 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176077 https://doi.org/10.1002/lno.11614 eng eng Umeå universitet, Institutionen för ekologi, miljö och geovetenskap Climate Impacts Research Centre, Umeå University, Umeå, Sweden Climate Impacts Research Centre, Umeå University, Umeå, Sweden; Stream Biolm and Ecosystem Research Laboratory, School of Architecture, Civil and Environmental Engineering, ÉcolePolytechnique Fédérale de Lausanne, Lausanne, Switzerland Limnology and Oceanography, 0024-3590, 2021, 66:S1, s. S182-S196 orcid:0000-0003-3279-3589 orcid:0000-0001-7853-2531 orcid:0000-0002-6381-4509 orcid:0000-0002-5758-2705 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176077 doi:10.1002/lno.11614 ISI:000574213000001 Scopus 2-s2.0-85091768445 info:eu-repo/semantics/openAccess Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Ecology Ekologi Article in journal info:eu-repo/semantics/article text 2021 ftumeauniv https://doi.org/10.1002/lno.11614 2023-09-22T13:54:19Z The seasonality of gross primary production (GPP) in streams is driven by multiple physical and chemical factors, yet incident light is often thought to be most important. In Arctic tundra streams, however, light is available in saturating amounts throughout the summer, but sharp declines in nutrient supply during the terrestrial growing season may constrain aquatic productivity. Given the opposing seasonality of these drivers, we hypothesized that "shoulder seasons"-spring and autumn-represent critical time windows when light and nutrients align to optimize rates of stream productivity in the Arctic. To test this, we measured annual patterns of GPP and biofilm accumulation in eight streams in Arctic Sweden. We found that the aquatic growing season length differed by 4 months across streams and was determined largely by the timing of ice-off in spring. During the growing season, temporal variability in GPP for nitrogen (N) poor streams was correlated with inorganic N concentration, while in more N-rich streams GPP was instead linked to changes in phosphorus and light. Annual GPP varied ninefold among streams and was enhanced by N availability, the length of ice-free period, and low flood frequency. Finally, network scale estimates of GPP highlight the overall significance of the shoulder seasons, which accounted for 48% of annual productivity. We suggest that the timing of ice off and nutrient supply from land interact to regulate the annual metabolic regimes of nutrient poor, Arctic streams, leading to unexpected peaks in productivity that are offset from the terrestrial growing season. Article in Journal/Newspaper Arctic Tundra Umeå University: Publications (DiVA) Arctic Limnology and Oceanography 66 S1 |
institution |
Open Polar |
collection |
Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Ecology Ekologi |
spellingShingle |
Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Ecology Ekologi Myrstener, Maria Gómez-Gener, Lluís Rocher-Ros, Gerard Giesler, Reiner Sponseller, Ryan A. Nutrients influence seasonal metabolic patterns and total productivity of Arctic streams |
topic_facet |
Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Ecology Ekologi |
description |
The seasonality of gross primary production (GPP) in streams is driven by multiple physical and chemical factors, yet incident light is often thought to be most important. In Arctic tundra streams, however, light is available in saturating amounts throughout the summer, but sharp declines in nutrient supply during the terrestrial growing season may constrain aquatic productivity. Given the opposing seasonality of these drivers, we hypothesized that "shoulder seasons"-spring and autumn-represent critical time windows when light and nutrients align to optimize rates of stream productivity in the Arctic. To test this, we measured annual patterns of GPP and biofilm accumulation in eight streams in Arctic Sweden. We found that the aquatic growing season length differed by 4 months across streams and was determined largely by the timing of ice-off in spring. During the growing season, temporal variability in GPP for nitrogen (N) poor streams was correlated with inorganic N concentration, while in more N-rich streams GPP was instead linked to changes in phosphorus and light. Annual GPP varied ninefold among streams and was enhanced by N availability, the length of ice-free period, and low flood frequency. Finally, network scale estimates of GPP highlight the overall significance of the shoulder seasons, which accounted for 48% of annual productivity. We suggest that the timing of ice off and nutrient supply from land interact to regulate the annual metabolic regimes of nutrient poor, Arctic streams, leading to unexpected peaks in productivity that are offset from the terrestrial growing season. |
format |
Article in Journal/Newspaper |
author |
Myrstener, Maria Gómez-Gener, Lluís Rocher-Ros, Gerard Giesler, Reiner Sponseller, Ryan A. |
author_facet |
Myrstener, Maria Gómez-Gener, Lluís Rocher-Ros, Gerard Giesler, Reiner Sponseller, Ryan A. |
author_sort |
Myrstener, Maria |
title |
Nutrients influence seasonal metabolic patterns and total productivity of Arctic streams |
title_short |
Nutrients influence seasonal metabolic patterns and total productivity of Arctic streams |
title_full |
Nutrients influence seasonal metabolic patterns and total productivity of Arctic streams |
title_fullStr |
Nutrients influence seasonal metabolic patterns and total productivity of Arctic streams |
title_full_unstemmed |
Nutrients influence seasonal metabolic patterns and total productivity of Arctic streams |
title_sort |
nutrients influence seasonal metabolic patterns and total productivity of arctic streams |
publisher |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
publishDate |
2021 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176077 https://doi.org/10.1002/lno.11614 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_relation |
Limnology and Oceanography, 0024-3590, 2021, 66:S1, s. S182-S196 orcid:0000-0003-3279-3589 orcid:0000-0001-7853-2531 orcid:0000-0002-6381-4509 orcid:0000-0002-5758-2705 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176077 doi:10.1002/lno.11614 ISI:000574213000001 Scopus 2-s2.0-85091768445 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/lno.11614 |
container_title |
Limnology and Oceanography |
container_volume |
66 |
container_issue |
S1 |
_version_ |
1779311451701248000 |