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JPR Advance Access originally published online on June 3, 2009
Journal of Plankton Research 2009 31(8):877-884; doi:10.1093/plankt/fbp038
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© The Author 2009. Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org

Air-dispersed phytoplankton in a Mediterranean River-Reservoir System (Aliakmon-Polyphytos, Greece)

Anastasia Chrisostomou1, Maria Moustaka-Gouni1,*, Stefanos Sgardelis2 and Thomas Lanaras1

1 Department of Botany, School of Biology, Aristotle University of Thessaloniki, Box 109, GR-541 24 Thessaloniki, Greece 2 Department of Ecology, School of Biology, Aristotle University of Thessaloniki, Box 119, GR-541 24 Thessaloniki, Greece

* CORRESPONDING AUTHOR: mmustaka{at}bio.auth.gr

Received on December 18, 2008; revised on May 6, 2009; accepted on May 7, 2009


  Abstract

The air-dispersed phytoplankton diversity and colonization potential, in a Mediterranean River-Reservoir System (Aliakmon-Polyphytos, Northern Greece), were studied. Phytoplankton samples were collected weekly, from five sampling sites in the river-reservoir system (for 11 weeks) and from jars replaced weekly for 10 successive weeks placed at one colonization site (CS) (for 10 weeks). The algal diversity in the river-reservoir system was high. The air-dispersed algae in the CS jars included taxa of the local species pool (reservoir phytoplankton), including taxa of the airborne algae common in most biogeographic regions. Both small- and large-sized phytoplankton in the vegetative form of unicells, small coenobia, large colonies and filaments were observed in the CS jars. Nanoplanktic algae and among them the known allergenic chlorophyte Chlorella were the most frequent and abundant air-dispersed algae. The large-sized chlorophytes Mougeotia sp. and Ulothrix sp. were also frequently air-dispersed in the CS jars. Chlorophytes exhibited the highest colonization potential, followed by diatoms and cyanobacteria. Evidence is provided that over short distances, the wind is an important agent for the dispersal of phytoplankton with different colonization potentials, including the bloom-forming toxic cyanobacterium Microcystis aeruginosa.

Corresponding editor: John Dolan


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