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In Europe, the implementation of the WFD requires the use of fish-based tools to assess the ecological status of all lentic water bodies, including reservoirs with an area of over 50 ha. The first multimetric, fishbased index developed by Karr has been mostly adapted to lotic systems; much less emphasis has been put on similar assessment of ecological conditions of lentic systems, especially reservoirs. In our study, a spatial analysis was done to assess the ecological status of three different, but geographically connected, water bodies: two reservoirs of the Kis-Balaton Water Protection System (KBWPS) and the western basin of Lake Balaton. The KBWPS was designed to function as a natural filter zone and to protect the water quality of Lake Balaton. The main aim of our study was to lay out the framework for assessing the ecological status of the Kis-Balaton Water Protection System and Lake Balaton and to present a preliminary approach to investigate what are the most applicable attributes and metrics which can be used later on in a more detailed study.
ecological status, fish-based index, Kis-Balaton Water Protection System, Lake Balaton, Water
[1] Padisak, J. & Reynolds, C.S., Shallow lakes: the absolute, the relative, the functional and the pragmatic. Hydrobiologia, 506–509, pp. 1–11, 2003. doi: http://dx.doi.org/10.1023/ B:HYDR.0000008630.49527.29
[2] Korponai, J., Braun, M., Buczkó, K., Gyulai, I., Forró, L., Nédli, J. & Papp I., Transition from shallow lake to a wetland: a multiproxy case study in Zalavári Pond, Lake Balaton, Hungary. Hydrobiologia, 641, pp. 225–244, 2010. doi: http://dx.doi.org/10.1007/s10750-009-0087-0
[3] Kovács, J., Hatvani, I.G., Korponai, J. & Kovácsné, Sz.I., Morlet wavelet and auto-correlation analysis of long term data series of the Kis-Balaton Water Protection System (KBWPS). Ecological Engineering, 36, pp. 1469–1477, 2010. doi: http://dx.doi.org/10.1016/j.ecoleng.2010.06.028
[4] Tátrai, I., Mátyás, K., Korponai, J., Paulovits, G. & Pomogyi, P., The role of the kis-balaton w ater protection system in the control of water quality of Lake Balaton. Ecological Engineering, 16, pp. 73–78, 2000. doi: http://dx.doi.org/10.1016/S0925-8574(00)00091-4
[5] Karr, J.R., Assessment of biotic integrity using fi sh communities. Fisheries, 6, pp. 21–27, 1981. doi: http://dx.doi.org/10.1577/1548-8446(1981)006<0021:AOBIUF>2.0.CO;2
[6] Karr, J.R., Fausch, K.D., Angermeier, P.L., Yan, P.R. & Schlosser, I.J., Assessing biological integrity in running waters: a method and its rationale. Special Publications 5. Champaign, IL: Illinois Natural History Survey, 1986.
[7] Appelberg, M., Bergquist, B.C. & Degerman, E., Using fi sh to assess environmental disturbance of Swedish lakes and streams –a preliminary approach. Verhandlungen Internationalen Vereiningun für Theoretische und Angewandte Limnologie, 27, pp. 311–315, 2000.
[8] Simon, T.P., Modifi cation of an index of biotic integrity and development of reference condition expectations for dunal, palustrine wetland fi sh communities along the southern shore of Lake Michigan. Aquatic Ecosystem Health and Management, 1, pp. 49–62, 1998.
[9] Irz, P., Odion, M., Argillier, C. & Pont, D., Comparison between the fi sh communities of lakes, reservoirs and rivers: can natural systems help defi ne the ecological potential of reservoirs? Aquatic Sciences, 68, pp. 109–116, 2006.
[10] Terra, B.F. & Araújo, F.G., A preliminary fi sh assemblage index for a transitional river–reservoir system in southeastern Brazil. Ecological Indicators, 11, pp. 874–88, 2011. doi: http://dx.doi.org/10.1577/1548-8446(1981)006<0021:AOBIUF>2.0.CO;2
[11] Petesse, M.L., Petrere, M. & Spigolon, R.J., Adaptation of the Reservoir Fish Assemblage Index (RFAI) for assessing the Barra Bonita Reservoir (São Paulo, Brazil). River Research and Applications, 23, pp. 595–612, 2007. doi: http://dx.doi.org/10.1002/rra.1001
[12] Launois, L., Veslot, J., Irz, P. & Argillier, C., Selecting fi sh-based metrics responding to human pressures in French natural lakes and reservoirs: towards the development of a fi sh-based index (FBI) for French lakes. Ecology of Freshwater Fish, 20, pp. 120–132, 2011. doi: http://dx.doi. org/10.1111/j.1600-0633.2010.00467.x
[13] Launois, L., Veslot, J., Irz, P. & Argillier, C., Development of a fi sh-based index (FBI) of biotic integrity for French lakes using the hindcasting approach. Ecological Indicators, doi:10.1016/j. ecolind.2011.03.028, 2011. doi: http://dx.doi.org/10.1016/j.ecolind.2011.03.028
[14] Simon,T.P. & Lyons, J., Application of the index of biotic integrity to evaluate water resource integrity in freshwater ecosystems. Biological Assessment and Criteria: Tools for Water R esource Planning and Decision Making, eds W.S Davis, T.P. Simon, Lewis Publishers, Boca Raton, FL, pp. 245–262, 1995.
[15] Roset, N., Grenouillet, G., Goffaux, D., Pont, D. & Kestemont, P., A review of existing fi sh a ssemblage indicators and methodologies. Fisheries Managament and Ecology, 14, pp. 393–40, 2007. doi: http://dx.doi.org/10.1111/j.1365-2400.2007.00589.x
[16] Hermoso V., Claveroc M., Blanco-Garridoe F. & Prenda J., Assessing the ecological status in species-poor systems: a fi sh-based index for Mediterranean Rivers (Guadiana River, SW Spain). Ecological Indicators, 10, pp. 1152–1161, 2010. doi: http://dx.doi.org/10.1016/j. ecolind.2010.03.018
[17] Hughes, R.M. & Oberdorff, T., Applications of IBI concepts and metrics to waters outside the United States and Canada. Levis Press: Boca Raton, Florida, 1999.
[18] Lyons, J., Gutierrez-Hernández, A., Díaz-Pardo, E., Soto-Galera, E., Medina-Nava, M. & Pineda-López, R., Development of a preliminary index of biotic integrity (IBI) based on fi sh assemblages to assess ecosystem condition in the lakes of central Mexico. Hydrobiologia, 418, pp. 57–72, 2000. doi: http://dx.doi.org/10.1023/A:1003888032756
[19] Er s T., Specziár A. & Bíró, P., Assessing fi sh assemblages in reed habitats of a large shallow lake -A comparison between gillnetting and electric fi shing. Fisheries Research, 96, pp. 70–76, 2009. doi: http://dx.doi.org/10.1016/j.fi shres.2008.09.009
[20] Zhu, D. & Chang, J., Annual variations of biotic integrity in the upper Yangtze River using an adapted index of biotic integrity (IBI). Ecological Indicators, 8, pp. 564–572, 2008. doi: http:// dx.doi.org/10.1016/j.ecolind.2007.07.004