Good morning. By way of background, could you tell me where your interest in wetlands comes from?
It was a gradual process. The topic of my M.Sc. thesis at the Prague Charles University (studies in 1951-56) was “Biological Effects of Peat andSphagnum”. When collecting samples from about 8 mires in Czechoslovakia, I learned to know wetland conditions for the first time in my life. Then, a gap in my interest in wetlands came, because my Ph.D. dissertation at the Czechoslovak Academy’s of Sciences Institute of Botany at Průhonice was on the “Production Ecology of the Herbaceous Layer”. Even then, though, some sample sites were in alluvial forests.
In 1963, I returned to the Ecology Department of the Institute of Botany in Brno from my 1962-63 postgraduate training at the University of Oxford, England, where I learned to use correctly the methods of growth analysis. Immediately after my return I became partly involved in the ecosystem study of alluvial meadows in South Moravia. In the same year, Dagmar Dykyjová attracted my attention to wetlands in the littoral zones of fishponds, which are, in fact, human-made shallow lakes used for rearing fish. This was at the beginning of the International Biological Programme (IBP, 1965-74) in which reed (Phragmites spp.) was recommended for comparative production ecological studies as an almost cosmopolitan genus with a high potential production. In Central Europe, the fishpond littoral vegetation is mostly dominated by common reed (Ph. australis). Thus, we identified the fishpond reed belts as highly suitable objects for assessing the productivity of Central European wetlands.
About 1968, we formed two small teams studying the fishpond littoral ecosystems: one at Třeboň, working in the climatically suboceanic South Bohemia, the other in Brno, in the more continental South Moravia. The results of this IBP project are summarized in a monograph edited by D. Dykyjová and myself (1978). In the meantime, in 1973, I moved from Brno to the Třeboň Hydrobotany Department of the Institute of Botany, founded by Slavomil Hejný in 1971. After IBP, we continued our wetland studies within the UNESCO programme MAB (Man and the Biosphere) and gradually widened our interest to whole fishponds, wet grassland, floodplains and mires..
The results of the MAB research of the upper Lužnice River and its floodplain are summarized in a monograph edited by Karel Prach et al. (1994). The results obtained in the other wetland ecosystems of the Třeboň Basin Biosphere Reserve are presented in another monograph, edited by myself, Jan Jeník and the late Lenka Soukupová (2002). Our studies on the functional ecology of wetlands are naturally continuing. My own present research interests concentrate on the production ecology of alluvial meadows and on the comparison between native Eurasian and invasive North American populations of the wetland plant purple loosestrife (Lythrum salicaria L.).
Why do wetlands fascinate you?
For me, wetlands are larger or smaller islands in the landscape, where the ecosystem functions predominantly in accordance with the rules of nature. I am fascinated by the diversification of wetlands according to the climatic, hydrological and trophic conditions. Wetlands host a great number of plant and animal species not occurring anywhere else. Among the wetland functions, I consider their heat and water balance as being of utmost importance for the role of wetlands as effective air-conditioning systems. Equally important is the role of wetlands as biological filters, which is also the principle behind the use of wetlands constructed for waste management. In littoral wetlands and in mires, one is free of the civilization stress, even if the distance to the nearest human settlements is only a few hundred meters.
What should be the world trend in the conservation and wise use of wetlands and of natural resources in general?
My understanding of this concept is quite broad. The general trend should lead to the sustainable use and management of such precious ecosystems as wetlands - for the benefit of both nature and people. In most cases, wetlands conservation cannot be separated from their wise use. Exceptions are wetlands requiring the application of strict conservation rules and measures which must be carefully and responsibly conceived, and then respected.
What do you value as your greatest success?
Strangely enough, this success is not purely scientific: it is my contribution to the elaboration of the Czech “Law on Nature and Landscape Conservation” at the time I was a deputy in the Czech National Council (1990-92). Naturally, I also value my contributions to a successful implementation of various scientific projects dealing with the functional ecology of wetlands. The results of our Třeboň team are summarized in the monographs I have already talked about, and in other publications of which I am the author or co-author. Of my awards, I ascribe a high value to the “International Fellowship Award” by the Society of Wetland Scientists (2001), membership in the Learned Society of the Czech Republic, corresponding membership of the Austrian Academy of Sciences, and my honorary membership of the Slovak Ecological Society. The first important acknowledgement of the results of our Brno team came in 1973 – the Czechoslovak Academy of Sciences prize for our achievements in the study of fishpond littoral and alluvial meadow ecosystems in South Moravia. Naturally, at present, I feel great pride over the “Recognition of Excellence” being awarded by the international Ramsar Committee.