Vegetation transitions drive the autotrophy–heterotrophy balance in Arctic lakes
“Arctic greening” will alter vegetation quantity and quality in northern watersheds, with possible consequences for lake metabolic balance. We used paleolimnology from six Arctic lakes in Greenland, Norway, and Alaska to develop a conceptual model describing how climate‐driven shifts in terrestrial...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:10049492 2023-12-24T10:12:43+01:00 Vegetation transitions drive the autotrophy–heterotrophy balance in Arctic lakes McGowan, S Anderson, NJ Edwards, ME Hopla, E Jones, V Langdon, PG Law, A Solovieva, N Turner, S Whiteford, EJ van Hardenbroek, M Wiik, E 2018-05-04 text https://discovery.ucl.ac.uk/id/eprint/10049492/1/McGowan_et_al-2018-Limnology_and_Oceanography_Letters-FINAL.pdf https://discovery.ucl.ac.uk/id/eprint/10049492/ eng eng https://discovery.ucl.ac.uk/id/eprint/10049492/1/McGowan_et_al-2018-Limnology_and_Oceanography_Letters-FINAL.pdf https://discovery.ucl.ac.uk/id/eprint/10049492/ open Limnology and Oceanography: Letters , 3 (3) pp. 246-255. (2018) Article 2018 ftucl 2023-11-27T13:07:29Z “Arctic greening” will alter vegetation quantity and quality in northern watersheds, with possible consequences for lake metabolic balance. We used paleolimnology from six Arctic lakes in Greenland, Norway, and Alaska to develop a conceptual model describing how climate‐driven shifts in terrestrial vegetation (spanning herb to boreal forest) influence lake autotrophic biomass (as chlorophyll and carotenoid pigments). Major autotrophic transitions occurred, including (1) optimal production of siliceous algae and cyanobacteria/chlorophytes at intermediate vegetation cover (dwarf shrub and Betula; dissolved organic carbon (DOC) range of 2–4 mg L−1), below and above which UVR exposure (DOC; < 2 mgL−1) and light extinction (DOC; > 4 mgL−1), respectively limit algal biomass, (2) an increase in potentially mixotrophic cryptophytes with higher forest cover and allochthonous carbon supply. Vegetation cover appears to influence lake autotrophs by changing influx of (colored) dissolved organic matter which has multiple interacting roles—as a photoprotectant—in light attenuation and in macronutrient (carbon, nitrogen) supply. Article in Journal/Newspaper Arctic Greening Arctic Greenland Alaska University College London: UCL Discovery Arctic Greenland Norway |
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University College London: UCL Discovery |
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ftucl |
language |
English |
description |
“Arctic greening” will alter vegetation quantity and quality in northern watersheds, with possible consequences for lake metabolic balance. We used paleolimnology from six Arctic lakes in Greenland, Norway, and Alaska to develop a conceptual model describing how climate‐driven shifts in terrestrial vegetation (spanning herb to boreal forest) influence lake autotrophic biomass (as chlorophyll and carotenoid pigments). Major autotrophic transitions occurred, including (1) optimal production of siliceous algae and cyanobacteria/chlorophytes at intermediate vegetation cover (dwarf shrub and Betula; dissolved organic carbon (DOC) range of 2–4 mg L−1), below and above which UVR exposure (DOC; < 2 mgL−1) and light extinction (DOC; > 4 mgL−1), respectively limit algal biomass, (2) an increase in potentially mixotrophic cryptophytes with higher forest cover and allochthonous carbon supply. Vegetation cover appears to influence lake autotrophs by changing influx of (colored) dissolved organic matter which has multiple interacting roles—as a photoprotectant—in light attenuation and in macronutrient (carbon, nitrogen) supply. |
format |
Article in Journal/Newspaper |
author |
McGowan, S Anderson, NJ Edwards, ME Hopla, E Jones, V Langdon, PG Law, A Solovieva, N Turner, S Whiteford, EJ van Hardenbroek, M Wiik, E |
spellingShingle |
McGowan, S Anderson, NJ Edwards, ME Hopla, E Jones, V Langdon, PG Law, A Solovieva, N Turner, S Whiteford, EJ van Hardenbroek, M Wiik, E Vegetation transitions drive the autotrophy–heterotrophy balance in Arctic lakes |
author_facet |
McGowan, S Anderson, NJ Edwards, ME Hopla, E Jones, V Langdon, PG Law, A Solovieva, N Turner, S Whiteford, EJ van Hardenbroek, M Wiik, E |
author_sort |
McGowan, S |
title |
Vegetation transitions drive the autotrophy–heterotrophy balance in Arctic lakes |
title_short |
Vegetation transitions drive the autotrophy–heterotrophy balance in Arctic lakes |
title_full |
Vegetation transitions drive the autotrophy–heterotrophy balance in Arctic lakes |
title_fullStr |
Vegetation transitions drive the autotrophy–heterotrophy balance in Arctic lakes |
title_full_unstemmed |
Vegetation transitions drive the autotrophy–heterotrophy balance in Arctic lakes |
title_sort |
vegetation transitions drive the autotrophy–heterotrophy balance in arctic lakes |
publishDate |
2018 |
url |
https://discovery.ucl.ac.uk/id/eprint/10049492/1/McGowan_et_al-2018-Limnology_and_Oceanography_Letters-FINAL.pdf https://discovery.ucl.ac.uk/id/eprint/10049492/ |
geographic |
Arctic Greenland Norway |
geographic_facet |
Arctic Greenland Norway |
genre |
Arctic Greening Arctic Greenland Alaska |
genre_facet |
Arctic Greening Arctic Greenland Alaska |
op_source |
Limnology and Oceanography: Letters , 3 (3) pp. 246-255. (2018) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/10049492/1/McGowan_et_al-2018-Limnology_and_Oceanography_Letters-FINAL.pdf https://discovery.ucl.ac.uk/id/eprint/10049492/ |
op_rights |
open |
_version_ |
1786176111926837248 |