Polar Biology

, Volume 18, Issue 6, pp 363–370

Temporal patterns of primary production in a large ultra-oligotrophic Antarctic freshwater lake

  • Peter Bayliss
  • J. Cynan Ellis-Evans
  • Johanna Laybourn-Parry
ORIGINAL PAPER

DOI: 10.1007/s003000050201

Cite this article as:
Bayliss, P., Ellis-Evans, J. & Laybourn-Parry, J. Polar Biol (1997) 18: 363. doi:10.1007/s003000050201

Abstract

A large ultra-oligotrophic Antarctic freshwater lake, Crooked Lake, was investigated between January 1993 and November 1993. The water column supported a small phytoplankton community limited by temperature, nutrient availability and, seasonally, by low photosynthetically active radiation. Chlorophyll a concentrations were consistently low (<1 g l−1) and showed no obvious seasonal patterns. Production rates were low, ranging from non-detectable to 0.56 g C l−1 h−1, with highest rates generally occurring towards the end of the austral winter and in spring. The pattern of carbon fixation indicated that the phytoplankton was adapted to low light levels. Chlorophyll a specific photosynthetic rates (assimilation numbers) ranged from non-detectable to 1.27 gC (g chlorophyll a)−1 h−1. Partitioning of photosynthetic products revealed carbon incorporation principally into storage products such as lipids at high light fluxes with increasing protein synthesis at depth. With little allochthonous input the data suggest that lake dynamics in this Antarctic system are driven by phytoplankton activity.

Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Peter Bayliss
    • 1
  • J. Cynan Ellis-Evans
    • 2
  • Johanna Laybourn-Parry
    • 3
  1. 1.British Antarctic Survey, High Cross, Madingley Road, Cambridge, UK and Institute of Environmental and Biological Sciences, University of Lancaster, LAY 4YQ, UKGB
  2. 2.British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 OET, UKGB
  3. 3.Department of Physiology and Environmental Science, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UKGB

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