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Polar Biology

, Volume 36, Issue 10, pp 1441–1450 | Cite as

First records of primary producers of epiglacial and supraglacial lakes in western Dronning Maud Land, Antarctica

  • Jorma Keskitalo
  • Matti Leppäranta
  • Lauri Arvola
Original Paper

Abstract

Epiglacial and supraglacial lakes are characteristic lake types in Antarctica, and regardless of their mostly seasonal existence and ultraoligotrophy, some lakes have a relatively diverse microbial community. The results of water chemistry and phytoplankton, based on basic limnological methods, from five epiglacial and two supraglacial seasonal lakes are presented from western Dronning Maud Land, an area where only physical studies have been previously carried out. Electric conductivity varied mostly between 0.1 and 10 mS m−1 (25 °C), phosphorus concentration was <5 mg m−3, and nitrogen concentration was <300 mg m−3 except in some shore areas, and water pH ranged from 6 to 11. Low phytoplankton biomasses (in most cases <10 mg m−3) supported the ultraoligotrophic status of the lakes. Phytoplankton was found from both types of lakes, but less was found from supraglacial lakes. The charophyte Mesotaenium cf. berggrenii dominated the supraglacial lakes, while cyanoprokaryotes such as Gloeocapsopsis cf. magma, Planktothrix prolifica/rubescens, Nostoc cf. sphaericum, Cyanothece sp. and Phormidium sp. dominated the biomass in some epiglacial lakes. Chrysophytes (e.g. Pseudopedinella-type flagellates) were observed in both types of lakes, and they were occasionally dominant. The green alga Botryococcus braunii, some diatoms (Cyclotella sp., Diatoma tenuis, Luticola muticopsis), and non-planktonic microalgal colonies visible to the eye (incl. the cyanoprokaryote Nostoc commune) were also found. Signs of a living ecosystem with a food web were observed in one epiglacial lake, but not elsewhere, which indicates extreme circumstances in the Antarctic seasonal lakes. Altogether, only some 25 taxa were discovered.

Keywords

Lakes Summer Geochemistry Phytoplankton Antarctica Dronning Maud Land 

Notes

Acknowledgments

We thank the FINNARP logistics for its support in the field campaign, with special thanks to Mr. Mika Kalakoski, expedition chief, for his help in the transportation of the samples, and to Mr. Petri Heinonen for guidance and discussions. Funding was provided for our project “Evolution of snow cover and dynamics of atmospheric deposits in the snow in the Antarctica” (#127691) by the Academy of Finland. Species identifications were proposed by the participants of a workshop of the Finnish Phytoplankton Society. Four reviewers made excellent suggestions, which helped us to improve the manuscript. The manuscript was corrected for English by Dr. John Loehr.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Jorma Keskitalo
    • 1
  • Matti Leppäranta
    • 2
  • Lauri Arvola
    • 1
  1. 1.Lammi Biological StationUniversity of HelsinkiLammiFinland
  2. 2.Department of PhysicsUniversity of HelsinkiHelsinkiFinland

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