Seasonal patterns in nutrient bioavailability in boreal headwater streams
Changes in nutrient bioavailability due to increased loading of dissolved organic matter (DOM) may impact boreal freshwaters. Yet, the relative bioavailability of carbon (C), nitrogen (N), and phosphorus (P) associated with terrestrial DOM remains poorly understood. We applied short-term bioassays w...
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Umeå universitet, Institutionen för ekologi, miljö och geovetenskap
2022
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ftumeauniv:oai:DiVA.org:umu-193315 2023-10-09T21:54:34+02:00 Seasonal patterns in nutrient bioavailability in boreal headwater streams Rulli, Mayra P. D. Bergström, Ann-Kristin Sponseller, Ryan A. Berggren, Martin 2022 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-193315 https://doi.org/10.1002/lno.12064 eng eng Umeå universitet, Institutionen för ekologi, miljö och geovetenskap Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden Limnology and Oceanography, 0024-3590, 2022, 67:5, s. 1169-1183 orcid:0000-0001-5102-4289 orcid:0000-0002-5758-2705 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-193315 doi:10.1002/lno.12064 ISI:000770606900001 Scopus 2-s2.0-85126488980 info:eu-repo/semantics/openAccess Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Article in journal info:eu-repo/semantics/article text 2022 ftumeauniv https://doi.org/10.1002/lno.12064 2023-09-22T13:56:02Z Changes in nutrient bioavailability due to increased loading of dissolved organic matter (DOM) may impact boreal freshwaters. Yet, the relative bioavailability of carbon (C), nitrogen (N), and phosphorus (P) associated with terrestrial DOM remains poorly understood. We applied short-term bioassays with natural bacterial inocula to determine seasonal variation in bioavailable organic nutrient pools from four boreal headwater streams in northern Sweden. Experiments were designed to exhaust bioavailable nutrients associated with DOM by inducing limiting conditions when all required resources except for the targeted nutrient (C, N, or P) are provided in excess. We hypothesized that the supply of different bioavailable nutrients to streams would reflect seasonal variations in terrestrial demand, hydrology, and temperature. The delivery of bioavailable DOM-associated resources from the four streams were, on average, 2%, 11%, and 38% of the total dissolved organic C, N, and P, respectively, emphasizing the relatively low C bioavailability in these DOM-rich waters. Bioavailable N : P ratios peaked in autumn for all sites, with lower values in winter and spring. Both in terms of relative (% of total) and absolute bioavailable organic nutrient concentrations, the seasonal pattern was characterized by systematically high values for the autumn period. Furthermore, links between bioavailable resources and temperature and hydrology varied across sites, time periods, and the different elements. Thus, elevated concentrations of bioavailable organic resources in autumn suggest the potential for leaf fall, as well as late season storms that rewet dry soils, to serve as considerable sources of C, N, and P to boreal aquatic ecosystems. Article in Journal/Newspaper Northern Sweden Umeå University: Publications (DiVA) Limnology and Oceanography |
institution |
Open Polar |
collection |
Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser |
spellingShingle |
Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Rulli, Mayra P. D. Bergström, Ann-Kristin Sponseller, Ryan A. Berggren, Martin Seasonal patterns in nutrient bioavailability in boreal headwater streams |
topic_facet |
Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser |
description |
Changes in nutrient bioavailability due to increased loading of dissolved organic matter (DOM) may impact boreal freshwaters. Yet, the relative bioavailability of carbon (C), nitrogen (N), and phosphorus (P) associated with terrestrial DOM remains poorly understood. We applied short-term bioassays with natural bacterial inocula to determine seasonal variation in bioavailable organic nutrient pools from four boreal headwater streams in northern Sweden. Experiments were designed to exhaust bioavailable nutrients associated with DOM by inducing limiting conditions when all required resources except for the targeted nutrient (C, N, or P) are provided in excess. We hypothesized that the supply of different bioavailable nutrients to streams would reflect seasonal variations in terrestrial demand, hydrology, and temperature. The delivery of bioavailable DOM-associated resources from the four streams were, on average, 2%, 11%, and 38% of the total dissolved organic C, N, and P, respectively, emphasizing the relatively low C bioavailability in these DOM-rich waters. Bioavailable N : P ratios peaked in autumn for all sites, with lower values in winter and spring. Both in terms of relative (% of total) and absolute bioavailable organic nutrient concentrations, the seasonal pattern was characterized by systematically high values for the autumn period. Furthermore, links between bioavailable resources and temperature and hydrology varied across sites, time periods, and the different elements. Thus, elevated concentrations of bioavailable organic resources in autumn suggest the potential for leaf fall, as well as late season storms that rewet dry soils, to serve as considerable sources of C, N, and P to boreal aquatic ecosystems. |
format |
Article in Journal/Newspaper |
author |
Rulli, Mayra P. D. Bergström, Ann-Kristin Sponseller, Ryan A. Berggren, Martin |
author_facet |
Rulli, Mayra P. D. Bergström, Ann-Kristin Sponseller, Ryan A. Berggren, Martin |
author_sort |
Rulli, Mayra P. D. |
title |
Seasonal patterns in nutrient bioavailability in boreal headwater streams |
title_short |
Seasonal patterns in nutrient bioavailability in boreal headwater streams |
title_full |
Seasonal patterns in nutrient bioavailability in boreal headwater streams |
title_fullStr |
Seasonal patterns in nutrient bioavailability in boreal headwater streams |
title_full_unstemmed |
Seasonal patterns in nutrient bioavailability in boreal headwater streams |
title_sort |
seasonal patterns in nutrient bioavailability in boreal headwater streams |
publisher |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
publishDate |
2022 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-193315 https://doi.org/10.1002/lno.12064 |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_relation |
Limnology and Oceanography, 0024-3590, 2022, 67:5, s. 1169-1183 orcid:0000-0001-5102-4289 orcid:0000-0002-5758-2705 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-193315 doi:10.1002/lno.12064 ISI:000770606900001 Scopus 2-s2.0-85126488980 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/lno.12064 |
container_title |
Limnology and Oceanography |
_version_ |
1779318192704847872 |