Biogeochemical responses over 37 years to manipulation of phosphorus concentrations in an Arctic river: The Upper Kuparuk River Experiment

Abstract The climate of the Arctic region is changing rapidly, with important implications for permafrost, vegetation communities, and transport of solutes by streams and rivers to the Arctic Ocean. While research on Arctic streams and rivers has accelerated in recent years, long‐term records are re...

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Published in:Hydrological Processes
Main Authors: Iannucci, Frances M., Beneš, Joshua, Medvedeff, Alexander, Bowden, William B.
Other Authors: Division of Environmental Biology, National Science Foundation
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2021
Subjects:
Online Access:http://dx.doi.org/10.1002/hyp.14075
https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.14075
https://onlinelibrary.wiley.com/doi/full-xml/10.1002/hyp.14075
https://onlinelibrary.wiley.com/doi/am-pdf/10.1002/hyp.14075
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spelling crwiley:10.1002/hyp.14075 2024-06-02T08:00:49+00:00 Biogeochemical responses over 37 years to manipulation of phosphorus concentrations in an Arctic river: The Upper Kuparuk River Experiment Iannucci, Frances M. Beneš, Joshua Medvedeff, Alexander Bowden, William B. Division of Environmental Biology National Science Foundation 2021 http://dx.doi.org/10.1002/hyp.14075 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.14075 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/hyp.14075 https://onlinelibrary.wiley.com/doi/am-pdf/10.1002/hyp.14075 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor Hydrological Processes volume 35, issue 3 ISSN 0885-6087 1099-1085 journal-article 2021 crwiley https://doi.org/10.1002/hyp.14075 2024-05-03T10:46:10Z Abstract The climate of the Arctic region is changing rapidly, with important implications for permafrost, vegetation communities, and transport of solutes by streams and rivers to the Arctic Ocean. While research on Arctic streams and rivers has accelerated in recent years, long‐term records are relatively rare compared to temperate and tropical regions. We began monitoring the upper Kuparuk River in 1983 as part of a long‐term, low‐level, whole‐season phosphorus enrichment of a 4–6 km experimental reach, which was subsequently incorporated into the Arctic Long‐Term Ecological Research (Arctic LTER) programme. The phosphorus enrichment phase of the Upper Kuparuk River Experiment (UKRE) ran continuously for 34 seasons, fundamentally altering the community structure and function of the Fertilized reach. The objectives of this paper are to (a) update observations of the environmental conditions in the Kuparuk River region as revealed by long‐term, catchment‐level monitoring, (b) compare long‐term trends in biogeochemical characteristics of phosphorus‐enriched and reference reaches of the Kuparuk River, and (c) report results from a new ‘ReFertilization’ experiment. During the UKRE, temperature and discharge did not change significantly, though precipitation increased slightly. However, the UKRE revealed unexpected community state changes attributable to phosphorus enrichment (e.g., appearance of colonizing bryophytes) and long‐term legacy effects of these state changes after cessation of the phosphorus enrichment. The UKRE also revealed important biogeochemical trends (e.g., increased nitrate flux and benthic C:N, decreased DOP flux). The decrease in DOP is particularly notable in that this may be a pan‐Arctic trend related to permafrost thaw and exposure to new sources of iron that reduce phosphorus mobility to streams and rivers. The trends revealed by the UKRE would have been difficult or impossible to identify without long‐term, catchment level research and may have important influences on connections between ... Article in Journal/Newspaper Arctic Arctic Ocean permafrost Wiley Online Library Arctic Arctic Ocean Hydrological Processes 35 3
institution Open Polar
collection Wiley Online Library
op_collection_id crwiley
language English
description Abstract The climate of the Arctic region is changing rapidly, with important implications for permafrost, vegetation communities, and transport of solutes by streams and rivers to the Arctic Ocean. While research on Arctic streams and rivers has accelerated in recent years, long‐term records are relatively rare compared to temperate and tropical regions. We began monitoring the upper Kuparuk River in 1983 as part of a long‐term, low‐level, whole‐season phosphorus enrichment of a 4–6 km experimental reach, which was subsequently incorporated into the Arctic Long‐Term Ecological Research (Arctic LTER) programme. The phosphorus enrichment phase of the Upper Kuparuk River Experiment (UKRE) ran continuously for 34 seasons, fundamentally altering the community structure and function of the Fertilized reach. The objectives of this paper are to (a) update observations of the environmental conditions in the Kuparuk River region as revealed by long‐term, catchment‐level monitoring, (b) compare long‐term trends in biogeochemical characteristics of phosphorus‐enriched and reference reaches of the Kuparuk River, and (c) report results from a new ‘ReFertilization’ experiment. During the UKRE, temperature and discharge did not change significantly, though precipitation increased slightly. However, the UKRE revealed unexpected community state changes attributable to phosphorus enrichment (e.g., appearance of colonizing bryophytes) and long‐term legacy effects of these state changes after cessation of the phosphorus enrichment. The UKRE also revealed important biogeochemical trends (e.g., increased nitrate flux and benthic C:N, decreased DOP flux). The decrease in DOP is particularly notable in that this may be a pan‐Arctic trend related to permafrost thaw and exposure to new sources of iron that reduce phosphorus mobility to streams and rivers. The trends revealed by the UKRE would have been difficult or impossible to identify without long‐term, catchment level research and may have important influences on connections between ...
author2 Division of Environmental Biology
National Science Foundation
format Article in Journal/Newspaper
author Iannucci, Frances M.
Beneš, Joshua
Medvedeff, Alexander
Bowden, William B.
spellingShingle Iannucci, Frances M.
Beneš, Joshua
Medvedeff, Alexander
Bowden, William B.
Biogeochemical responses over 37 years to manipulation of phosphorus concentrations in an Arctic river: The Upper Kuparuk River Experiment
author_facet Iannucci, Frances M.
Beneš, Joshua
Medvedeff, Alexander
Bowden, William B.
author_sort Iannucci, Frances M.
title Biogeochemical responses over 37 years to manipulation of phosphorus concentrations in an Arctic river: The Upper Kuparuk River Experiment
title_short Biogeochemical responses over 37 years to manipulation of phosphorus concentrations in an Arctic river: The Upper Kuparuk River Experiment
title_full Biogeochemical responses over 37 years to manipulation of phosphorus concentrations in an Arctic river: The Upper Kuparuk River Experiment
title_fullStr Biogeochemical responses over 37 years to manipulation of phosphorus concentrations in an Arctic river: The Upper Kuparuk River Experiment
title_full_unstemmed Biogeochemical responses over 37 years to manipulation of phosphorus concentrations in an Arctic river: The Upper Kuparuk River Experiment
title_sort biogeochemical responses over 37 years to manipulation of phosphorus concentrations in an arctic river: the upper kuparuk river experiment
publisher Wiley
publishDate 2021
url http://dx.doi.org/10.1002/hyp.14075
https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.14075
https://onlinelibrary.wiley.com/doi/full-xml/10.1002/hyp.14075
https://onlinelibrary.wiley.com/doi/am-pdf/10.1002/hyp.14075
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volume 35, issue 3
ISSN 0885-6087 1099-1085
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