Vegetation transitions drive the autotrophy–heterotrophy balance in Arctic lakes

Suzanne McGowan; N. John Anderson; Mary E. Edwards; Emma Hopla; Viv Jones; Pete G. Langdon; Antonia Law; Nadia Solovieva; Simon Turner; Maarten van Hardenbroek; Erika J Whiteford; Emma Wiik

doi:10.1002/lol2.10086

Vegetation transitions drive the autotrophy–heterotrophy balance in Arctic lakes

Suzanne McGowan (Corresponding author), N. John Anderson, Mary E. Edwards, Emma Hopla, Viv Jones, Pete G. Langdon, Antonia Law, Nadia Solovieva, Simon Turner, Maarten van Hardenbroek, Erika J Whiteford, Emma Wiik

Research output: Contribution to journal/periodical › Article › Scientific › peer-review

Abstract

“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.

Original language	English
Pages (from-to)	246-255
Number of pages	10
Journal	Limnology & Oceanography Letters
Volume	3
Issue number	3
DOIs	https://doi.org/10.1002/lol2.10086
Publication status	Published - 2018
Externally published	Yes

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McGowan, Suzanne ; Anderson, N. John ; Edwards, Mary E. ; Hopla, Emma ; Jones, Viv ; Langdon, Pete G. ; Law, Antonia ; Solovieva, Nadia ; Turner, Simon ; van Hardenbroek, Maarten ; Whiteford, Erika J ; Wiik, Emma. / Vegetation transitions drive the autotrophy–heterotrophy balance in Arctic lakes. In: Limnology & Oceanography Letters. 2018 ; Vol. 3, No. 3. pp. 246-255.

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title = "Vegetation transitions drive the autotrophy–heterotrophy balance in Arctic lakes",

abstract = "“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.",

author = "Suzanne McGowan and Anderson, {N. John} and Edwards, {Mary E.} and Emma Hopla and Viv Jones and Langdon, {Pete G.} and Antonia Law and Nadia Solovieva and Simon Turner and {van Hardenbroek}, Maarten and Whiteford, {Erika J} and Emma Wiik",

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doi = "10.1002/lol2.10086",

language = "English",

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journal = "Limnology & Oceanography Letters",

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publisher = " Association for the Sciences of Limnology and Oceanography (ASLO)",

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Vegetation transitions drive the autotrophy–heterotrophy balance in Arctic lakes. / McGowan, Suzanne (Corresponding author); Anderson, N. John; Edwards, Mary E.; Hopla, Emma; Jones, Viv; Langdon, Pete G.; Law, Antonia; Solovieva, Nadia; Turner, Simon; van Hardenbroek, Maarten; Whiteford, Erika J; Wiik, Emma.

In: Limnology & Oceanography Letters, Vol. 3, No. 3, 2018, p. 246-255.

Research output: Contribution to journal/periodical › Article › Scientific › peer-review

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AU - McGowan, Suzanne

AU - Anderson, N. John

AU - Edwards, Mary E.

AU - Hopla, Emma

AU - Jones, Viv

AU - Langdon, Pete G.

AU - Law, Antonia

AU - Solovieva, Nadia

AU - Turner, Simon

AU - van Hardenbroek, Maarten

AU - Whiteford, Erika J

AU - Wiik, Emma

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AB - “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.

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JO - Limnology & Oceanography Letters

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SN - 2378-2242

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ER -

Vegetation transitions drive the autotrophy–heterotrophy balance in Arctic lakes

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