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ASO Project
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Dreissena spp. native range and recent invasions – current knowledge, potential approaches and further actions


See also: http://www.aso.zsi.at

Start Date: May 2008

Project duration: 11 Months


Freshwater ecosystems were subject to dramatic changes due to human impact in the last decades. As a result, in European inland waters, many indigenous species have declined or disappeared, while other species have considerably extended their species range, thus causing ecological, economic and social damages. In this respect, very good example is the genus Dreissena which includes freshwater and brackish bivalve mollusc species with Ponto-Caspian origin. Two of its representatives the zebra mussel, Dreissena polymorpha and quagga mussel, D. bugensis, are known to be among the most aggressive aquatic invaders. Other representatives, such as D. stankovici, were considered endemic to the ancient tectonic lakes in the Balkan Peninsula. This project aims to contribute to the study of species with genus Dreissena in their native and invaded ranges in Europe. The main objectives are: 1) Compilation of existing data, exchange of experience and knowledge about the highly invasive Dreissena species in Austria, Bulgaria and Romania, and the native species in lakes in Macedonia; 2) Collection of new data on recently infested water bodies and newly established populations; 3) Exchange and integration of different methodological approaches and exchange of research results; 4) Planning and preparing of further collaborative research activities in this area. These objectives will be accomplished by organization of joint field trips in Austria, Bulgaria, Macedonia and Bulgarian-Romanian stretch of the Danube; by organization of working meeting; by preparation of joint publication/s and project draft. With the implementation of this project we expect: to initiate a scientific networking in the area of invasive biology and ecology of Dreissena spp.; to contribute to the development of national, regional and European policy strategies concerning the alien and native invasive species, as well as the preservation of biodiversity and protection of natural ecosystems from invasions; to promote and to obtain support for further actions at national and European level.

Project Website: not available yet



Project Website:




Bulgarian Academy of Sciences, Institute of Zoology
1 Tsar Osvoboditel Blvd., 1000 Sofia, BULGARIA
Project Manager: Teodora Trichkova

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Project Partners:

University of Innsbruck, Institute of Ecology
Technikerstrasse 25, A-6020 Innsbruck, AUSTRIA

Team Leader: Univ.-Prof. Dr. Leopold Füreder


Hydrobiological Institute Ohrid
Naum Ohridski 50, 6000 Ohrid, REPUBLIC OF MACEDONIA
Team Leader: Assist. Prof. Dr Sasho Trajanovski
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"Grigore Antipa" National Museum of Natural History
Sos. Kiseleff No. 1, Bucharest 011341, ROMANIA
Team Leader: Assist. Prof. Dr Luis Popa
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some photos:


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This website is developed with support from the Bulgarian Science Fund, Ministry of Education, Youth and Science,
within the Project "Assessment and Management of Dreissena spp. Invasions in the Bulgarian Water Bodies",
Contract Number: DO-02-283/2008.

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