Landscape controls on nutrient stoichiometry regulate lake primary production at the margin of the Greenland ice sheet
Global change is reshaping the physical environment and altering nutrient dynamics across the Arctic. These changes can affect the structure and function of biological communities and influence important climate-related feedbacks (for example, carbon (C) sequestration) in biogeochemical processing h...
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ftloughboroughun:oai:figshare.com:article/16699855 2023-05-15T15:00:41+02:00 Landscape controls on nutrient stoichiometry regulate lake primary production at the margin of the Greenland ice sheet Clay Prater Joanna Bullard Christopher L Osburn Sarah L Martin Michael J Watts Nicholas John Anderson 2021-08-17T00:00:00Z https://figshare.com/articles/journal_contribution/Landscape_controls_on_nutrient_stoichiometry_regulate_lake_primary_production_at_the_margin_of_the_Greenland_ice_sheet/16699855 unknown 2134/16699855.v1 https://figshare.com/articles/journal_contribution/Landscape_controls_on_nutrient_stoichiometry_regulate_lake_primary_production_at_the_margin_of_the_Greenland_ice_sheet/16699855 CC BY 4.0 CC-BY Uncategorized Diatom Biogenic silica Biogeochemistry Limnology Ecological stoichiometry Nutrient limitation Atmospheric deposition Arctic Text Journal contribution 2021 ftloughboroughun 2022-01-01T19:07:25Z Global change is reshaping the physical environment and altering nutrient dynamics across the Arctic. These changes can affect the structure and function of biological communities and influence important climate-related feedbacks (for example, carbon (C) sequestration) in biogeochemical processing hot spots such as lakes. To understand how these ecosystems will respond in the future, this study examined recent (< 10 y) and long-term (1000 y) shifts in autotrophic production across paraglacial environmental gradients in SW Greenland. Contemporary lake temperatures and light levels increased with distance from the ice sheet, along with dissolved organic C (DOC) concentrations and total nitrogen:total phosphorus (TN:TP) ratios. Diatom production measured as biogenic silica accumulation rates (BSiARs) and diatom contribution to microbial communities declined across these gradients, while total production estimated using C accumulation rates and δ13C increased, indicating that autochthonous production and C burial are controlled by microbial competition and competitive displacement across physiochemical gradients in the region. Diatom production was generally low across lakes prior to the 1800’s AD but has risen 1.5–3× above background levels starting between 1750 and 1880 AD. These increases predate contemporary regional warming by 115–250 years, and temperature stimulation of primary production was inconsistent with paleorecords for ~ 90% of the last millennium. Instead, primary production appeared to be more strongly related to N and P availability, which differs considerably across the region due to lake landscape position, glacial activity and degree of atmospheric nutrient deposition. These results suggest that biological responses to enhanced nutrient supply could serve as important negative feedbacks to global change. Other Non-Article Part of Journal/Newspaper Arctic Greenland Ice Sheet Loughborough University: Figshare Arctic Greenland |
institution |
Open Polar |
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Loughborough University: Figshare |
op_collection_id |
ftloughboroughun |
language |
unknown |
topic |
Uncategorized Diatom Biogenic silica Biogeochemistry Limnology Ecological stoichiometry Nutrient limitation Atmospheric deposition Arctic |
spellingShingle |
Uncategorized Diatom Biogenic silica Biogeochemistry Limnology Ecological stoichiometry Nutrient limitation Atmospheric deposition Arctic Clay Prater Joanna Bullard Christopher L Osburn Sarah L Martin Michael J Watts Nicholas John Anderson Landscape controls on nutrient stoichiometry regulate lake primary production at the margin of the Greenland ice sheet |
topic_facet |
Uncategorized Diatom Biogenic silica Biogeochemistry Limnology Ecological stoichiometry Nutrient limitation Atmospheric deposition Arctic |
description |
Global change is reshaping the physical environment and altering nutrient dynamics across the Arctic. These changes can affect the structure and function of biological communities and influence important climate-related feedbacks (for example, carbon (C) sequestration) in biogeochemical processing hot spots such as lakes. To understand how these ecosystems will respond in the future, this study examined recent (< 10 y) and long-term (1000 y) shifts in autotrophic production across paraglacial environmental gradients in SW Greenland. Contemporary lake temperatures and light levels increased with distance from the ice sheet, along with dissolved organic C (DOC) concentrations and total nitrogen:total phosphorus (TN:TP) ratios. Diatom production measured as biogenic silica accumulation rates (BSiARs) and diatom contribution to microbial communities declined across these gradients, while total production estimated using C accumulation rates and δ13C increased, indicating that autochthonous production and C burial are controlled by microbial competition and competitive displacement across physiochemical gradients in the region. Diatom production was generally low across lakes prior to the 1800’s AD but has risen 1.5–3× above background levels starting between 1750 and 1880 AD. These increases predate contemporary regional warming by 115–250 years, and temperature stimulation of primary production was inconsistent with paleorecords for ~ 90% of the last millennium. Instead, primary production appeared to be more strongly related to N and P availability, which differs considerably across the region due to lake landscape position, glacial activity and degree of atmospheric nutrient deposition. These results suggest that biological responses to enhanced nutrient supply could serve as important negative feedbacks to global change. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Clay Prater Joanna Bullard Christopher L Osburn Sarah L Martin Michael J Watts Nicholas John Anderson |
author_facet |
Clay Prater Joanna Bullard Christopher L Osburn Sarah L Martin Michael J Watts Nicholas John Anderson |
author_sort |
Clay Prater |
title |
Landscape controls on nutrient stoichiometry regulate lake primary production at the margin of the Greenland ice sheet |
title_short |
Landscape controls on nutrient stoichiometry regulate lake primary production at the margin of the Greenland ice sheet |
title_full |
Landscape controls on nutrient stoichiometry regulate lake primary production at the margin of the Greenland ice sheet |
title_fullStr |
Landscape controls on nutrient stoichiometry regulate lake primary production at the margin of the Greenland ice sheet |
title_full_unstemmed |
Landscape controls on nutrient stoichiometry regulate lake primary production at the margin of the Greenland ice sheet |
title_sort |
landscape controls on nutrient stoichiometry regulate lake primary production at the margin of the greenland ice sheet |
publishDate |
2021 |
url |
https://figshare.com/articles/journal_contribution/Landscape_controls_on_nutrient_stoichiometry_regulate_lake_primary_production_at_the_margin_of_the_Greenland_ice_sheet/16699855 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Ice Sheet |
genre_facet |
Arctic Greenland Ice Sheet |
op_relation |
2134/16699855.v1 https://figshare.com/articles/journal_contribution/Landscape_controls_on_nutrient_stoichiometry_regulate_lake_primary_production_at_the_margin_of_the_Greenland_ice_sheet/16699855 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
_version_ |
1766332758912663552 |