Phenological shifts in lake stratification under climate change

Woolway, R. Iestyn; Sharma, Sapna; Weyhenmeyer, Gesa A.; Debolskiy, Andrey; Golub, Malgorzata; Mercado-Bettín, Daniel; Perroud, Marjorie; Stepanenko, Victor; Tan, Zeli; Grant, Luke; Ladwig, Robert; Mesman, Jorrit; Moore, Tadhg N.; Shatwell, Tom; Vanderkelen, Inne; Austin, Jay A.; DeGasperi, Curtis L.; Dokulil, Martin; La Fuente, Sofia; Mackay, Eleanor B.; Schladow, S. Geoffrey; Watanabe, Shohei; Marcé, Rafael; Pierson, Don C.; Thiery, Wim; Jennings, Eleanor. 2021 Phenological shifts in lake stratification under climate change. Nature Communications, 12, 2318. 11, pp.

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One of the most important physical characteristics driving lifecycle events in lakes is stratification. Already subtle variations in the timing of stratification onset and break-up (phenology) are known to have major ecological effects, mainly by determining the availability of light, nutrients, carbon and oxygen to organisms. Despite its ecological importance, historic and future global changes in stratification phenology are unknown. Here, we used a lake-climate model ensemble and long-term observational data, to investigate changes in lake stratification phenology across the Northern Hemisphere from 1901 to 2099. Under the high-greenhouse-gas-emission scenario, stratification will begin 22.0 ± 7.0 days earlier and end 11.3 ± 4.7 days later by the end of this century. It is very likely that this 33.3 ± 11.7 day prolongation in stratification will accelerate lake deoxygenation with subsequent effects on nutrient mineralization and phosphorus release from lake sediments. Further misalignment of lifecycle events, with possible irreversible changes for lake ecosystems, is also likely.

Item Type: Publication - Article
Digital Object Identifier (DOI):
UKCEH and CEH Sections/Science Areas: Water Resources (Science Area 2017-)
ISSN: 2041-1723
Additional Information. Not used in RCUK Gateway to Research.: Open Access paper - full text available via Official URL link.
Additional Keywords: limnology, projection and prediction
NORA Subject Terms: Ecology and Environment
Date made live: 21 May 2021 16:03 +0 (UTC)

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