Limnological Review Volume 1/2001 Editorial Board A. Choiński - Adam Mickiewicz University in Poznań J. Drwal - Gdansk University H. Gawrońska - University of Warmia and Mazury in Olsztyn R. Glazik — Nicholas Copernicus University in Toruń A. Górniak - University of Białystok A. T. Jankowski - Silesian University in Katowice J. Jańczak - Institute of Meteorology and Water Management, Branch of Poznań W. Lange - Gdańsk University K. Lossow - University of Warmia and Mazury in Olsztyn W. Marszelewski - Nicholas Copernicus University in Toruń Z. Michalczyk - Maria Curie-Skłodowska University in Lublin R. Skowron - Nicholas Copernicus University in Toruń M. Turczyński - Maria Curie-Skłodowska University in Lublin R. Wiśniewski - Nicholas Copernicus University in Toruń Editorial staff of volume 1/2001 - W. Marszelewski and R. Skowron The proof in English by Hazel Pearson Cover design by I. Skowrońska and P. Kabaciński Correspondence to the editors: Limnological Review, Nicholas Copernicus University, ul. Fredry 6, 87-100 Toruń; e-mail: limrevncu@geo.uni.torun.pl This volume of Limnological Review was sponsored by the Voivodeship Fund of Environmental Protection and Water Management in Toruń All Rights Reserved. No part of this periodical may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except as described below, without permission in writing from the Publisher. Printed in Poland © Copyright by Wydawnictwo Uniwersytetu Mikołaja Kopernika Toruń 2001 ISSN 1642-5952 WYDAWNICTWO UNIWERSYTETU MIKOŁAJA KOPERNIKA ul. Gagarina 11, 87-100 Toruń Editor's office: tel. (056) 611 42 95; Promotion and publicity: tel./fax (056) 611 42 98; fax 654 29 48; email: ksiazki@cc.uni.torun.pl; www.uni.torun.pl/wyd Wydanie I. Nakład 350 egz. Composition: Studio KROPKA dtp - Piotr Kabaciński, tel. (056) 66 01 737; (0 602) 303 814 Druk: Zakład Poligraficzno-Wydawniczy POZKAL; ul. Cegielna 10/12, 88-100 Inowrocław Limnological Review 1(2001) 1-2 Introduction Among naturalists there are several approaches as regards the subject and scope of limnology. The first of them draws on the definition formulated about 100 years ago by F. A. Forel and defines limnology as a discipline which is concerned with research on lakes and which lies on the borders of hydrology, geography and biology. According to another view, limnology as the study of lakes is part of hydrology, and limnological studies and research may be conducted in several disciplines (for example, biology, chemistry, geography, physics and mechanics). The third view identifies limnology with the biology of all continental waters, and even with hydrobiology. Limnology is, however, an interdisciplinary science which connects elements from biology, cartography, chemistry, climatology, ecology, geography, hydrology and physics, and which gives special significance to the environment surrounding lakes and in accordance with the International Hydrological Dictionary - is concerned with studying lakes and open water bodies. Such a definition of limnology concurs with the view of F. A. Forel and seems to be the most appropriate for the varied directions of research on lakes, including the aspect of their changes under the influence of natural and anthropogenic factors. The problems connected with natural and anthropogenic changes of lakes and with the determination of their causes, effects, tendencies and the methods allowing the rate of degradation, excess eutrophication and the disappearance of lakes to be checked are undoubtedly among the most important in contemporary limnology. They can only be solved thanks to the integration and co-operation of a wide range of specialists in limnology who are joined by the common aim of their research - lakes and their catchment areas. Such integrated co-operation among limnologists began in Poland in the 1980s, and its result was the scientific conference organised by Nicholas Copernicus University in 1988, entitled ,,Natural and anthropogenic changes of lakes and wetlands in Poland". Closer co-operation and exchange of views followed during subsequent national limnological conferences in the years 1997-2001, organised by Adam Mickiewicz University (1997), Gdansk University (1998), Adam Mickiewicz University and Institute of Meteorology and Water Management (1999), Warmia and Mazury University (2000) and Nicholas Copernicus University (2001), which were devoted to similar problems. During these conferences the idea was conceived of the need to publish a separate scientific periodical promoting scientific achievements in this field. The present volume is the first of a new series of publications entitled Limnological Review. The subject matter of this and subsequent volumes will be all aspects and types of changes in lakes and the search for and introduction of effective methods to prevent the further degradation of the whole lacustrine ecosystem. Papers concerning artificial reservoirs may be presented within a narrow scope of research, especially as regards the presentation of new research methods. Original, unpublished research papers will be accepted for publication. In accordance with the current plans, Limnological Review will come out once a year. We hope that the publications in Limnological Review will contribute both to the development of scientific knowledge in the sphere of limnology arid to the elaboration and application of more effective methods for the protection of lakes. This will be possible thanks to the presentation of the results of studies and of opinions regarding the causes and effects of any changes taking place in lakes, including those that lead to their increased eutrofication. Wlodzimierz Marszelewski