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Title: Seasonal and regional controls of phytoplankton production along a climate gradient in South-West Greenland during ice-cover and ice-free conditions
Authors: Whiteford, Erika J.
McGowan, Suzanne
Barry, Chris D.
Anderson, N. John
Issue Date: 2016
Publisher: University of Colorado at Boulder, Institute of Arctic and Alpine Research (INSTAAR)
Citation: WHITEFORD, E.J. ... et al, 2016. Seasonal and regional controls of phytoplankton production along a climate gradient in South-West Greenland during ice-cover and ice-free conditions. Arctic, Antarctic, and Alpine Research, 48(1), pp.139-160.
Abstract: Across a small geographic area (< 180 km), the region of South West Greenland covers a natural climate gradient. Variation in temperature and precipitation result in marked differences in limnology at three discrete locations: ice sheet margin, inland and the coast. Replicate lakes from each location were sampled for physical (temperature, light), chemical (dissolved oxygen, pH, conductivity, nutrients) and biological (chlorophyll a (Chl a), photosynthetic pigments) variables on three occasions within a 12 month period: July - August 2010, April - May 2011 and June - July 2011 spanning ice cover. Variation in ice phenology was linked to the climate gradient; however phytoplankton production and community composition did not differ regionally. Large-scale seasonal fluctuations in temperature and nutrient availability were the strongest predictors of phytoplankton production, with a shift from nitrate to phosphorus controlled production between ice cover and ice free conditions. Underlying seasonal drivers, variables predicting production were unique to each location: ice sheet margin (soluble reactive phosphorus), inland (temperature) and coast (silicate) and reflect local differences in nutrient availability. Results from the current study have important consequences when controls over phytoplankton production in Arctic lakes are inferred from a limited number of sites, but up-scaled to represent pan-Arctic trends.
Description: This paper is closed access until publication as Open Access in the journal.
Version: Published
DOI: 10.1657/AAAR0015-003
URI: https://dspace.lboro.ac.uk/2134/18741
Publisher Link: http://dx.doi.org/10.1657/AAAR0015-003
ISSN: 1523-0430
Appears in Collections:Closed Access (Geography)

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