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Testate Amoebae (Testaceae) of Lithuania

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Testate Amoebae (Testaceae) of Lithuania BIOLOGIJA. 2014. Vol. 60. No. 2. P. 59–69 © Lietuvos mokslų akademija, 2014 Testate amoebae (Testaceae) of Lithuania Ingrida Šatkauskienė* Lithuania is situated in the geographical centre of Europe, on the eastern coast of the Baltic Sea. The landscape is formed by lakes, Vytautas Magnus University, rivers, some wetlands and woodlands. The majority of vertebrate Faculty of Natural Sciences, and invertebrate fauna of Lithuania are explored sufficiently well. Vileikos str. 8, However, free living protists in Lithuania are studied very scantily. Kaunas LT-44404, The aim of this study was to provide an overview of testate Lithuania amoebae in Lithuania on the basis of own results and of literature data recorded by other researchers. Fifty seven testate amoebae species of 13 genera were identified. 28 species of testate amoebae were revealed from soil mosses, 7 from lichen X. parietina and 29 from various types of freshwater habitats. Species of genus Difflugia (16 species) dominated in freshwater habitats. The most diverse genera in moss and lichen were Euglypha (9 species). Key words: biogeography, testate amoebae, diversity, Lithuania INTRODUCTION Testate amoebae are abundant in aquatic eco systems and simultaneously comprise a sig- Testate amoebae are free living single called euka- nificant part of microbial biomass in the soil (Es- ryotes which are distinguishable from other shel- teban et al., 2006) and moss (Balik, 1996; Mit- led amoeboid eukaryotes such as foraminifera, ra- chel et al., 2004, 2008; Mieszcan, 2007). Eating diolarians and heliozoans by their one chamber ed bac teria, microscopic fungi and algae, amoebae shell and their pseudopodia that can be lobose in clude these organisms into common nutritio- or filose. The most characteristic feature of these nal network of ecosystems (Gilbert et al., 1998) organisms is the shell, which can be agglutinated and become own food for larger than themsel- from mineral particles; proteinaceous, calcareous ves microinvertebrates. Thus, although invisible or siliceous (Meisterfeld, 2002a, b). to the naked eye, these microscopic creatures are important for the normal functioning of * Corresponding author. E-mail: [email protected] eco systems. No less important that free living 60 Ingrida Šatkauskienė amoebae may become vectors and hosts of Lithuania” (Mažeikaitė, 2003). However, this fungi, bacteria and other microorganisms work was written in the Lithuanian language, (Loret and Greub, 2010; Winiecka-Krusnell so it is not available for English speaking and Linder, 2001). scientists. Testate amoebae are useful as indicators. Data on the terrestrial amoebae are even The se protists can be valuable indicators of more scanty. The main causes of insufficient soil quali ty (Foissner, 1987) or can be used research of testate amoebae and other free living as bioindica tors for environmental pol lu tion protists in Lithuania might be the following: as sessment (Balik, 1991). The mac ro in ver- firstly, it is believed that investigations of these teb rates (Ple cop te ra, Trichoptera, Ephe me­ protists are less topical because they are not rop tera) are mostly used as bioindicators of parasitic (?), not pathogenic (?) and do not aqua tic ecosys tems for the assessment (Ro- provide economic benefit, thus their analysis is sen berg and Resh, 1992; Hodkinson and Jack- not necessary. In the above, I tried to reject this son, 2005; Holt and Mil ler, 2011). For the approach and to highlight the importance of eva luating the state of the terrestrial ecosys - testate amoebae. The second, perhaps equally tems lichen are used (Conti and Cecchetti, important reason – microscopic analysis of most 2001; Perlamutter, 2010) and mos ses (Har- free living protozoa and identification is quite mens et al., 2008; Shröder et al., 2010a). Ac- complicated, time-consuming and patience- cording to Nqueyen (Nqueyen et al., 2004), consuming work, so many investigators find it testate amoebae can be a good indicator for unattractive. monitoring, assessment of air pollution for Thus, the testate amoebae are abundant several reasons: 1) they live in the mosses and and important in different ecosystems, and are directly exposed to airborne contaminants, for practical applications. Although many 2) testate amoebae are abundant and diverse, European countries are intensively researched 3) most species are cosmopolitan and preva- in respect of testate amoebae, Lithuania in lent everywhere, 4) their relatively easy iden- this respect is as empty and does not complete tifi ca tion of inclusions with tests remains after the gap of biogeographically important data death of the organism. The main testate amoe- deficiencies. Hence the objective of present bae “symptoms” in response to the pollu tion study was a) to introduce testate amoebae which of the environment is a decrease in diversity are found in freshwater by Mažeikaitė (2003), and abundance, changes in the distribution b) to document the taxonomic composition of (Balik, 1991). moss and lichen testate amoebae in Lithuania, Testate amoebae are sensitive to physical c) to assess their distribution with regard to changes of the surrounding environment, the ecological preference (on the basis of literature moisture content (Beyene et al., 1986; Sullivan data and own research). and Booth, 2011), temperature (Tsyganov et al., 2013), hence they can be used as a model or- MATERIALS AND METHODS ganism for the environmental studies and eco toxicology (Nguyen-Viet et al., 2007; Pay- Study area ne et al., 2012). Lithuania is located in the eastern part of Europe The testate amoebae have long been not on the coast of the Baltic Sea. The rainiest investigated in Lithuania. Mažeikaitė, carrying months are July and August (precipitation out research of freshwater heterotrophic 92–95 mm); the driest month is May (30 mm). protists, described many species of ciliates and The average temperature in July is 17 °C (the also 29 species of testate amoebae found in mean of the maximum temperatures 35 °C), the freshwater (Mažeikaitė, 2003). The author in winter – 5 °C (the mean of the minimum summarized the results of research in the book tem peratures –25––30 °C). The climate is tem- “Freshwater plankton heterotrophic protists of perate. Testate amoebae (Testaceae) of Lithuania 61 Sampling sites lected in Nida (Šatkauskienė and Vosyliūtė, The samples examined by the above cited 2010). Mažeikaitė (Mažeikaitė, 2003) and Šat kaus- V. 3. Raudondvaris (54.9431° N, 23.7833° E) kie nė (Šatkauskienė et al., 2010, 2012, 2013) is a village on the Nemunas River in Kaunas were collected from the following types of district. The samples of soil moss Dicranium po­ ha bitats in Lithuania: I – Natural and Karst lysetum, Brachytecium albicans were collected Lakes, II – Rivers; III – Lagoons; IV – Artificial (Šatkauskienė and Vosyliūtė, 2010). re servoirs; V – Soil and epiphytic mosses; V. 4. Zarasai (55°43′59″ N, 26°15′00″ E) is VI – Epiphytic lichens. The studied localities of located in the north-eastern Lithuania, 3 km these habitats are given below. from the border with Latvia. This town is called I – Natural and Karst Lakes: Balsys; Ba- City of Lakes as more than 10% of territory of luo šas; Bedugnis; Burgis; Buržoras; Drūkšiai; Zarasai district is covered by water. The moss Duobulis; Dusia; Ešerinis; Gulstas; M. Gulbi- Pleurozium schreberi, Dicranium scoparium nai, D. Gulbinai; Kreivasis; Kirkilai; Šlavantas; were collected from soil (Šatkauskienė and Vo- Il gis (Mažeikaitė, 2003). Karst lakes (investiga t- sy liūtė, 2010). ed in 1997, 1998, 2000, 2001): Kirkilai, Katilny - V. 5. Domeikava village (54°58′ 0″ N, čia (Mažeikaitė, 2003). 23°55′ 10″ E) is located in Kaunas district, on the II – Rivers: Baltelė; Katilnyčia; Neris; Ne- right bank of the Neris River. Moss (Pleurozium vėžis; Tatula; Spėra (Mažeikaitė, 2003). schreberi) samples were collected from the III – Lagoons: Curonian Lagoon (55°5′ 34″ N, ground in a pine forest with several deciduous 20°54′ 59″ E) (Mažeikaitė, 2003) is separated trees (rowan and oak) (Šatkauskienė et al., 2013). from the Baltic Sea by Curonian Spit. The V. 6. Sereikiškės Park (54 41′ 0″ N, Lagoon is classified as brackish. 25 17′ 49″ E) is a public park in Vilnius City. It IV – Artificial reservoirs: Elektrėnai Reser - is located on the right bank of the Vilnia River. voir (Mažeikaitė, 2003). Elektrėnai Reservoir is The park will feature botanical exposition the third-biggest artificial lake in Lithuania. It (Šatkauskienė et al., 2013). supplies cooling water to 1.800 MW Elektrėnai V. 7. Pilėnai forest (N 54°57′32″, E 24°1′17″) Power Plant. The reser voir covers about 1 264 is located in Kaunas district. The forest mainly hectares with depth of over 30 metres. consists of pine, birch, fir, aspen and also oak, V – Soil and epiphytic moss: alder and ash. The moss (Pleurozium schre­ V. 1. Jonava (55.0722° N, 24.2806° E) locat ed beri) was collected from the ground (Šat kaus- in Kaunas County in central Lithuania. The ci ty kienė et al., 2013). is an important industrial (in particular, che mi- V. 8. Verkiai Regional Park (54 47′ 0″ N, cal industry) and transport centre. Ache ma, the 25 18′ 0″ E) is located in Vilnius municipality. largest fertilizer factory in the Bal tic States, is The park occupies 2670 hectares. More than located nearby. Samples of moss (epiphytic moss 76% of the park area is covered by forests. Brachytecium albicans; soil moss Pleurozium Ver kiai are landscape, architectural and small schre beri, Dicranium sco parium, Brachytecium lakes geomorphological reserve. For rare and sale brosum) were col lec ted beside factory Ache­ endangered species habitats four areas of the ma (Šatkauskienė and Vosyliūtė, 2010). park are included in European network of V. 2. Nida (55°18′N 21°00′ E, 55.300° pro tected areas – Natura 2000 (http://www. N 21.000° E) is a resort town located on the pavilniai-verkiai.lt/lt/?pid=4).
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