Biology and Diversity of Desmids

Uppsala 14-17 September 2001

A desmid course was held in Uppsala in September 2001 organized by the Department of Environmental Assessment at the Swedish University of Agricultural Sciences in cooperation with the Nordic Phytoplankton and Periphyton Group (NPPG)* . Dr. Peter Coesel, Institute for Biodiversity and Ecosystem Dynamics at the University of Amsterdam was invited as a course leader.

Altogether ca 100 desmid species were identified from fresh material sampled in the littoral and pelagial zones of four boreal lakes in the county of Uppland, Central Sweden. A selected number of species is illustrated below. The digital pictures were taken by Roland Bengtsson, Tore Lindholm, Kirsten Olrik and Eva Willén from both fresh and preserved material.

The following main determination keys were used:

Coesel, P.F.M. 1982, 1983, 1985, 1991, 1994, 1997. Teil 1–6. Wetenschappelijke Mededelingen 153, 157, 170, 202, 210, 220. KNNV Uitgeverij, Utrecht.

Förster, K. 1982. Conjugatophyceae – Zygnematales und Desmidiales. In Huber-Pestalozzi: Das Phytoplankton des Süsswassers. Teil 8:1. E. Schweizerbart´sche Verlagsbuchhandlung, Stuttgart.

Krieger, W. & Gerloff, J. 1962–1969. Die Gattung Cosmarium. J. Cramer, Weinheim. Lieferung 1–4.

Lenzenweger, R. 1996, 1997,1999. Desmidiaceenflora von Österreich. Bibliotheca Phycologica 101, 102, 104. J. Cramer, Stuttgart.

Lind, E. & Brook, A. 1980. A key to the commoner desmids of the English Lake District. Freshwater Biological Association, scientific publication 42.

Ruzicka, J. 1977, 1981. Die Desmidiaceen Mitteleuropas. E. Schweizerbart´sche Verlagsbuchhandlung, Stuttgart.

Teiling, E. 1967. The desmid genus Staurodesmus. Arkiv för Botanik. Royal Swedish Academy of Sciences Serie 2, Tome 6 no 11.

W. & G.S. West 1904–1923. A monograph of the British Desmidiaceae. Ray Society, London. Volume 1–5.

* Eva Willén, Ann-Marie Wiederholm and Isabell Quintana were responsible organizers.