Ábrahám Levente (szerk.): Válogatott tanulmányok X. - Natura Somogyiensis 25. (Kaposvár, 2014)
Cozma N. J. - Juhász P. - Müller Z. - Olajos P. - Kiss B.: The true bug (Heteroptera: Nepomorpha, Gerromorpha) fauna of some soda pans and sodic water bodies of Great Hungarian Plain
42 Natura Somogyiensis Csányi et al. (1988), Horváth (1950), Richnovszky (1970, 1977), Richnovszky et al. (1978), as well as Szabó (1980, 1990, 1993) studied molluscs. The most tipical sodic beetles - Berosus fulvus, Berosus spinosus, Enochrus bicolor, Enochrus hamifer - were explored in the southern part of the Great Hungarian Plain by Csabai and Móra (2003) and Csabai et al. (2010). The typical dragonfly fauna in soda pans and sodic waters is mainly composed of Lestes and Sympetrum species. The most representative sodic species are Lestes macrostigma, L. barbarus, L. sponsa, L. dry as, Sympetrum fonscolombii, S. meridionale and .S', sanguineum. Additionally, Ischnura pumilio, Ischnura elegáns pontica, Orthetrum albistylum, rarely Hemianax ephipigger and other species with wide salinity tolerance can be observed (Ambrus et al. 1996a, 1996b, 1998, Olajos et al. 1998). The knowledge on the Odonata fauna of soda pans has been expanded by Juhász et al. (1998a) and Kiss et al. (2001) during the study of organisms among vegetation. The exploration of the bug fauna of these habitats began with intensive research on the Lake Fertő (Horváth 1923, Moldoványi 1977). Bakonyi and Vásárhelyi (1981, 1987) conducted faunistic surveys in the areas of Hortobágy and Kiskunság. Scattered data on the Heteroptera fauna of sodic waters in the region of Tiszántúl can be found in studies by Csongor (1956), Dosztál (1974), Juhász et al. (1998b) and Kiss et al. (1999a). According to these studies, semiaquatic bugs (Gerromorpha) are represented by Mesovelia furcata, Microvelia reticulata and some Gerris species in sodic waters. The most characteristic and dominant sodic aquatic bugs (Nepomorpha) are Paracorixa concinna and Cymatia rogenhoferi. Other very abundant species in these water bodies are Sigara lateralis and Corixa affinis (Bakonyi and Vásárhelyi 1987, Boros 1999, Csabai et al. 2010, Juhász et al. 1998a,b, Kiss et al. 2001, Petri et al. 2012, Soós 1963). This paper aims to present the true bug fauna of some soda pans and sodic water bodies in the Great Hungarian Plain. Material and methods Studied water bodies Soda pans are a special type of inland athalassohaline waters (Hammer 1986). These shallow and astatic habitats are characterized by large fluctuations of water level and high levels of conductivity coupled with high alkalinity in the lowland parts of the Carpathian Basin. A pan can be regarded as natural or semi-natural if it was not strongly disturbed by human activities and it was of natural origin or constructed in the former decades (Horváth et al. 2014). Faunistic data was gathered countrywide from 29 soda pans and sodic water bodies at 474 sampling events (Table 1). Localities were mainly selected based on a soda pan survey in 2010-2011 (Emil Boros, personal communication, Horváth et al. 2013). Most samples were collected from four typical soda pans (Böddi-szék, Kelemen-szék, Büdösszék (Szabadszállás) and Zab-szék) and one macrophyte-dominated soda pan (Fehérszék) in Kiskunság. These water bodies were sampled regularly for several years. Sampling Heteropterans were sampled in 1997-2001, 2004-2005, 2007-2008, as well as in 2010 (Table 2). The faunistic sampling was conducted by hand netting with a pond net (0.25x0.25 m2, meshsize0.95 mm) in 1997, 1998, 1999, 2000,2001,2004, 2005. Quantitative sampling
