_HACQUETIA 12/1 • 2013, 165-171_
DOI: 10.2478/HACQ-2013-0006
GAGEA BOHEMICA in slovakia: 1. taxonomy
AND DISTRIBuTION
Jaroslav KOŠtAL\ Pavol ELIÁŠ jun.2, Helena VOJTEKOVÁi &
Daniel DÎTË3
Abstract
Distribution, morphological types and coenotic affinity of Gagea bohémica in Slovakia was studied during 2008-2011. Revision of herbarium material showed presence of three taxa in the flora: 1) subsp. bohémica, 2) subsp. bohémica var. stenochlamydea and 3) subsp. saxatilis. Taxonomic status of var. stenochlamydea is uncertain and requires further research. In total, 42 localities of G. bohemica sensu lato were documented. Nominate subsp. bohemica (including var. stenochlamydea) predominated and it was recently confirmed at 21 localities. These current sites represent about 50% of all known sites, therefore we re-assessed the status of G. bohemica in the Slovak Red List and we proposed the IUCN category EN (endangered) for this taxon. Subsp. saxatilis was found as new to Slovakia. The taxon occurred only at single locality (Vinosady) and it was not confirmed recently. We assessed it as data deficient (DD).
Keywords: dry grasslands, IUCN criteria, occurrence, pioneer vegetation, taxa. Izvleček
Proučevali smo razširjenost, morfološke tipe in fitocenološko navezanost vrste Gagea bohemica na Slovaškem v obdobju 2008-2011. Z revizijo herbarijskega materiala smo dokazali prisotnost treh taksonov: 1) subsp. bohemica, 2) subsp. bohemica var. stenochlamydea in 3) subsp. saxatilis. Taksonomski status var. stenochlamydea je negotov in potrebne so dodatne raziskave. Skupno smo zabeležili 42 lokalitet vrste G. bohemica sensu lato. Podvrsta subsp. bohemica (ki vključuje tudi var. stenochlamydea) prevladuje in je bila potrjena na 21 lokalitetah. Ta rastišča predstavljajo približno polovico vseh znanih, zato smo ponovno ocenili status vrste G. bohemica v Rdečem seznamu Slovaške in za ta takson predlagamo IUCN kategorijo EN (prizadeta vrsta). Pojavljenje podvrste subsp. saxatilis je novo na Slovaškem. Našli smo jo samo na eni lokaliteti (Vinosady) in uspevanje v zadnjem času ni bilo potrejno. Ocenjujemo jo s kategorijo DD (premalo podatkov). Ključne besede: suha travišča, IUCN kategorija, pojavljanje, pionirska vegetacija, taksoni.
1. INTRODUCTION
Gagea bohemica (Zauschn.) J. A. et J. H. Schult. is an Eastern-Mediterranean and Euro-continental taxon with the centre of distribution range in the Mediterranean area to the east to Turkey and Israel, with the westernmost localities found in Wales (Rix & Woods 1981, Slater 1990, Barina et al. 2010). In Central Europe, it occurs mainly in Germany (Saxony-Anhalt and Rhineland Palatinate), in the Bohemian basin (Czech Republic),
in the Vienna basin and in the north and northwest of the Pannonian basin (Austria, Moravia, Hungary and Slovakia) (Hrouda 1989a, b, Gruna et al. 1999, Király & Mesterházy 2009, Peterson et al. 2010).
The species is a member of the section Didymo-bulbos which includes Gagea species without sub-cylindrical and/or without broadly hollow first basal leaf as well as solid first cauline leaf (Richardson 1980, Tison 2009). Infraspecific variability of Gagea bohemica was assessed at three dif-
1	Administration of Ponitrie Protected Landscape Area, Samova 2, SK-949 01 Nitra, Slovakia, kostaljar@gmail.com, helena.vojtekova@sopsr.sk
2	Department of Botany, Slovak University of Agriculture, Tr. A. Hlinku 2, SK-949 76 Nitra, Slovakia, pelias@afnet.uniag.sk
8 Institute of Botany, Slovak Academy of Sciences, Dubravska cesta 9, 845 23, Bratislava, Slovakia, daniel.dite@savba.sk
ferent levels: (1) as two separate species Gagea bohémica and G. saxatilis (Richardson 1980), (2) two subspecies bohémica and saxatilis (Mert. & W. D. J. Koch) Asch. & Graebn. (Hrouda 1989, 2010, John et al. 2004, Peterson et al. 2004, Fischer et al. 2008) or (3) as an extremely variable single species G. bohémica (Slater 1990, Peruzzi & Gargano 2005). Recently, Peterson et al. (2010) found that a differentiation between specific and infraspe-cific taxa is not possible based on the molecular and morphological data of 43 populations from Western Europe to the Mediterranean area and eastern Caucasus. Although they recognized two extreme morphological types (subsp. saxatilis and subsp. bohémica) of four morphological key features (form and length of the perianth segments and the pilosity of the peduncle and pedicels), several G. bohémica individuals were found with intermediate morphological characters and several populations displayed different morphological types. The same morphological types were found in populations from different regions, e.g. in Mediterranean and Central European populations. These results indicate that the distribution of morphological types is not connected with geographical distribution (Peruzzi & Tison 2004, Peterson et al. 2010).
Gagéa bohémica is rare in many countries of Central Europe and it was also included in some Red Lists. While in Slovakia the species is evaluated as critically endangered (Feráková et al. 2001), it is included in lower categories in other neighbouring countries - in Austria and the Czech Republic it is evaluated as vulnerable (Niklfeld & Schratt-Ehrendorfer 1999; Procház-ka 2001) and it is considered near threatened in Hungary (Király 2009).
The aims of this study were (1) to describe in detail historical and current distribution of G. bohémica in Slovakia and (2) to assess the occurrence of different morphological types.
2. MATERIAL AND METHODS
The study was carried out during the period 20082011. The historical data concerning the distribution of the species were achieved from herbaria BP, BRA, BRNU, BRNM, LTM, NI, KO, PMK, PR, PRC, SAV, SLO and ZV. Specimens collected during this research are stored in herbarium NI. Herbarium abbreviations are according to Holmgren et al. (1990) and Vozarova & Sutory (2001).
The active floristic survey was carried out to confirm recent localities of the species. Results of this study are presented on the point map. The map was designed by program ArcGis, version 9.2. The grid on the map follows one that was described by Niklfeld (1971). Coordinates of historical localities were taken from Google Earth. Coordinates of recent localities were obtained during field research using GPS equipment Garmin CS 60. The abbreviations of works published before 1956 are cited following Futâk & Domin (1960), the nomenclature of flowering plants follows Marhold & Hindâk (1998) and phytogeographical divisions follow Futâk (1980).
4. RESULTS AND DISCUSSION
From the taxonomic point of view, three different G. bohémica taxa were distinguished in Slovakia: subsp. bohémica, subsp. saxatilis and subsp. bohémica var. sténochlamydéa Borbás (Fig. 1, 2).
Figure 1: Gagea bohémica: A - growth habit of G. bohémica subsp. bohémica, B - detail of flower of G. bohémica subsp. bohémica var. stenochlamydea, C - detail of flower of G. bohémica subsp. saxatilis (drawn by Renata Grošaftovd, 2011). Slika 1: Gagéa bohémica: A - rastne značilnosti G. bohémica subsp. bohémica, B - podroben prikaz cveta G. bohémica subsp. bohémica var. sténochlamydéa, C - podroben prikaz G. bohémica subsp. saxatilis (risba Renata Grošaftovd, 2011).
J. KoSTÁL, P. ElIÁS JUN., H. VOJTEKOVÁ & D. DíTE: GAGEA BOHEMICA IN SLOVAKIA: 1. TAXONOMY AND DISTRIBUTION
Occurrence of the nominate subspecies and var. stenochlamydea was known relatively long ago (Hrouda 1998a, b, Gruna et al. 1999), but the occurrence of subsp. saxatilis was not found until our study. Individuals of G. bohémica subsp. saxatilis have lanceolate perianth segments, 10 to 13.5 mm in length and are very hairy on the stem and the pedicels. On the contrary, G. bohemica subsp. bohémica is characteristic by spathulate perianth segments, 13 to 16.5 mm in length, with sparse pi-losity of the stem, rarely there are even individuals without hairs (Hrouda 1998a, b, Peterson et al. 2004). According to Peterson et al. (2010), populations of subsp. bohémica var. stenochlamydea represented morphological type different from the two morphologically extreme forms evaluated as subsp. saxatilis and subsp. bohemica. Hrouda (1989b) considers the morphological differences so serious, that he evaluated the taxon to the subspecies level as G. bohemica subsp. stenochlamydea (Borbás) Hrouda ined. For confirmation of this assessment the plants from the Tribec Mts have to be analyzed by the molecular methods in the future. According to Gruna et al. (1999), we believe that the use of the temporary name subsp. bohemica var. stenochlamydea is warranted for now.
In total, 41 localities of Gagea bohemica sensu lato were found in Slovakia when compiling together data from field research, herbarium revisions and excerption of published and unpublished works (Fig. 2). Our data confirmed earlier knowledge on distribution of the species (Dostál & Cervenka 1992, Hrouda 1998b, Gruna et al. 1999), but the information now is much more clear and expanded. The species has occurred in the five, more or less separate, areas at the edges of Pannonicum and Carpaticum phytogeo-graphical districts (see Appendix): 1) in a wider area of Bratislava, 2) in the Zoborské vrchy Hills near Nitra, 3) in the Burda Hills near Stúrovo, 4) around the municipalities of Hronsky Benadik and Tlmace, and 5) around the town of Zvolen. During the study of herbarium material we came across one doubtful locality - Vel'ká Stozka Hill in the Muránska Planina Mts. (Soják 1958 PRC, subsp. bohemica). We believe that this represent a confusion of the herbarium material, because species occurrence at an altitude of about 1000 m above sea level is highly unlikely. Also, no other data on the incidence of the species in this area are known (Hrouda 1998a, b, Gruna at al. 1999, Kochjarová et al. 2004).
49°
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74
75
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80 81 82
67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101
Figure 2: Distribution of Gagea bohemica in Slovakia: o - historical occurrence of the species, • - recent localities of G. bohemica subsp. bohemica, C» - occurrence of G. bohemica subsp. saxatilis.
Slika 2: Razširjenost vrste Gagea bohemica na Slovaškem: o - zgodovinski podatki, • - trenutne lokalitete G. bohemica subsp. bohemica, O - pojavljanje G. bohemica subsp. saxatilis.
48°
Revision of herbarium material revealed that nominate subsp. bohemica predominated in all above mentioned areas (13 sites) except at the Zoborske vrchy Hills and the area around Zvo-len. As mentioned above, the different taxon named subsp. bohemica var. stenochlamydea was recognized in the Zoborske vrchy Hills (Hrouda 1998b, Gruna et al. 1999, Fig. 3). Only 3-5 localities of this taxon were published in the past (Halada 1991, Svobodova et al. 2007), but at present 15 sites are known (for details see Kostal & Rosinova 2010).
Accurate differentiation of Gagea bohemica taxa in the Zvolen area (3 sites) was not possible because herbarium vouchers are missing and there are only literature data. According to Hrouda (1998b), we believe that it was the nominate subs. bohemica there. On the other hand, it is also possible, that the species did never grow in this area and published data represent confusion with other species of the genus Gagea. Despite a fairly intensive research (Manica 1975, 1984, 2004, Vlcko & Manica 1989, Hrivnak & Letz 2010 ined.), the species was not confirmed here at least for more than 50 years. Similar situation is at some localities on the south-western foothills of the Stiavnicke vrchy Mts. - around Hronsky
Beñadik (3 localities), at Burda Hills (2 localities) and at sites around Bratislava - in the Devínska Kobyla Hills (Feráková et al. 1997), near Záhor-ská Ves (1 locality) and in the Malé Karpaty Mts. (6 localities). Finally, recent occurrence of subsp. bohemica (including var. stenochlamydea) was confirmed at 20 localities; this means that there still exist about 50% of all identified sites of nominate subspecies in Slovakia. The sizes of local populations were very variable during our surveys (varying from a few individuals to thousands of individuals per single local population), mostly depending on weather conditions of the particular year. As the main threats of the subspecies survival we consider changes in habitat quality - local populations are threatened especially by quarrying and secondary succession (overgrowing of open space by perennial plants and trees). Using all available field data and IUCN criteria (IUCN 2001), we suggest to move the subspecies from IUCN category CR (critically endangered, Feráková et al. 2001) to category EN B1a(i)c(iv) (endangered).
Subsp. saxatilis was found only at a single locality near the Vinosady settlement (Fig. 2). The taxon (as G. bohemica) was mentioned here since the end of the fifties of the last century (Ptacovsky
Figure 3: Gagea bohemica subsp. bohemica var. stenochlamydea in Žibrica Nature Reserve (Tribeč Mts., photo J. Koštal). Slika 3: Gagea bohemica subsp. bohemica var. stenochlamydea v naravnem rezervatu Žibrica (gorovje Tribeč, foto J. Koštal).
1959), but it was reliably documented by herbarium voucher only in the eighties (Ondrasek 1983 BRA). The locality has not been confirmed at present. Using IUCN criteria (IUCN 2001), we evaluated the taxon in the category DD (data deficient). The subspecies saxatilis is regarded as a western-European taxon, and it is reported from the Iberian Peninsula, France, Wales, Germany, Czech Republic (Moravia) and the north-western Hungary (Hrouda 2010, Peterson et al. 2010). The site in Slovakia fill the gap in the distribution of the species between the sites in Moravia (Namest na Hane, Senicka na Hane) and in Hungary (near the Tihany). Based on our data we believe, that the eastern limit of the subspecies range passes through the territory of western Slovakia and potentially new localities will be here discovered.
5. ACKNOWLEDGEMENTS
We are indebted to Radoslav Pozgaj (Administration of Ponitrie Protected Landscape Area, Nitra) and Vladimir Pavlovic (Department of Ecology and Environmental Sciences, Constantinus the Philosopher University, Nitra) for their help with the field research and Maria Hajnalova (Department of Archaeology, Constantine the Philosopher University, Nitra) for English language revision. We are also thankful to Renata Grosaftova for illustrations. This paper was supported by the Slovak Grant Agency for Science VEGA (grants No. 1/0814/09 and 1/0308/13) and KEGA (grant No. 3/7356/09).
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Received 27. 9. 2011 Revision received 20. 12. 2012 Accepted 21. 12. 2012
APPENDIX
List of localities of Gagea bohémica taxa in Slovakia [numbers of phytogeographical regions according to Futák (1980)].
1.	Burda Hills: Burda Hill (F. A. Novák 1922 PRC, subsp. bohemica). - Kovácovské kopce Hills (Májovsky et Jurko 1958). = Skaly site, rare, 120 m a. s. l. (F. A. Novák 1922 PRC, subsp. bohemica).
2.	Ipel'sko-rimavská brázda Region: Rybník
-	Cajkov - Tekovská Nová Ves (Suza 1945: 5).
4.	Borská nízina Lowland: Záhorská Ves (Neilreich 1859: 49, 1870: 254; Knapp 1864b: 305).
5.	Devínska Kobyla Hills: Bratislava [Pressburg], Devínska Kobyla (F. A. Novák 1923a: 72; Cerny 1934 PRC, subsp. bohemica). - Bratislava, Borik [Tümlerberg] (Scheffer 1926: 22; Neumeyer 1929: 400; Schidlay sine data BRA, subsp. bohemica). 6. Podunajská nízina Lowland: Bratislava, Mudronova ul. [Pozsony, Császár út mell.] (Mergl 1902 SAV, subsp. bohemica). - Svaty Jur, dry grasslands upper the village, 150 m a. s. l. (Weber 1929 BRA, subsp. bohemica; Schidlay
1930	BRA, subsp. bohemica; Cerny et Weber 1932 BRA, subsp. bohemica; Cerny 1935 PR, subsp. bohemica; Nábelek sine data SAV, subsp. bohemica; Ptacovsky 1936 BRA, subsp. bohemica; Schidlay 1941 BRA, SLO, subsp. bohemica). - Svaty Jur, grasslands upper the chapel (Ptacovsky 1924,
1931	SAV, subsp. bohemica; Kostál et Rosinová 2010). - Svaty Jur, railway embankment under the chapel (Ptacovsky 1937 SAV, subsp. bohemica). - Svaty Jur, edge of Súr site near chapel (Ptacovsky 1938 SAV, subsp. bohemica). - Vino-sady, Holubyho lúka site - Vinosady, Brableco-va lúka site (both Kost'ál 2009; Válková 2010 in verb., subsp. bohemica). - Vinosady [Malé Tínie] (Michálková 1957 in Ptacovsky 1959; Ondrásek 1983 BRA, subsp. saxatilis). - Nitra, Kalvária Hill, near the chapel on the top (Kostál et Ros-inová 2010; Eliás jun. 2008 NI, subsp. bohemica var. stenochlamydea). - Nitra, Kalvária Hill, near the water tank (Kostál et Rosinová 2010, subsp. bohemica var. stenochlamydea). - Psiare (Suza 1945: 5; Novák 1954). - Mochovce (Suza 1945: 5).
-	Kozárovce, Plesovica Hill, SW stony slope, 260 m a. s. l. (David 1984 LTM, subsp. bohemica; Kostál 2011, subsp. bohemica). - Kozárovce, Chríb Hill, andesitic hill near the village above train, 210 m a. s. l. (David 1990 LTM, subsp. bohemica; Eliás jun. 2011 NI, subsp. bohemica). -
Kozárovce, elevation point 236 m a. s. l. (Suza 1945: 5; Futák 1947: 30; Novák 1954; Májovsky et Jurko 1958). = Kozárovce, Skala hill (David 1988 LTM, subsp. bohemica; Kostal et Rosinová 2009, subsp. bohemica). 12. Tríbec Mts.: Lupka Hill, quarcitic rocks (Kostál et Rosinová 2010, subsp. bohemica var. stenochlamydea). - Malá Skalka Hill (Kostál et Rosinová 2010; Eliás jun. 2011 NI, subsp. subsp. bohemica var. stenochlamydea). - Nitra, grasslands upper the monastery = Nitra, Zoborská lesostep Nature Preserve (Vlach 1925, 1926 PRC, subsp. bohemica var. stenochlamydea; Vlach 1929: 271-273; Kostál et Rosinová 2010, subsp. bohemica var. stenochlamydea). - small dolomite hill west from the Zoborská lesostep Nature Preserve, ca 403 m a. s. l. - elevation point 400 m a. s. l. between Plieska Hill and Meskov vrch Hill - Plieska Hill - Meskov vrch Hill (all data Kostál et Rosinová 2010, subsp. bohemica var. stenochlamydea) - Zobor Hill (Knapp 1865: 23; Pax 1908: 179; Sourek 1951 PR, subsp. bohemica var. stenochlamydea; Kostál et Rosinová 2010, subsp. bohemica var. stenochlamydea). - Pyramída Hill, southern and southwestern slopes (Kostál et Rosinová 2010; Eliás jun. 2008 NI, subsp. stenochlamydea). - Nitrianske Hrnciarovce, elevation point 220 m a. s. l. (Vlach 1929: 271-273). - Dolné Stitáre, vrch Haranc [Garanc], SW slope near the top (Svobodová 1974 NI, subsp. bohemica var. stenochlamydea; Kostál et Rosinová 2010, subsp. bohemica var. stenochlamydea). - Dolné Stitáre, meadows under the Zibrica Hill (Eliás jun. 2008 NI, subsp. bohemica var. stenochlamydea; Kostál et Rosinová 2010, subsp. bohemica var. stenochlamydea). - Vápeník Hill, southern slopes (Kostál et Rosinová 2010, subsp. bohemica var. stenochlamydea). 14a. Pohronsky Inovec Mts.: Hronsky [Svaty] Benadik (Suza 1945: 5). 14c. Kremnické vrchy Mts.: Budca, Bucan Hill - Zvolen, Vel'ká Stráz Hill (both data Májovsky et Jurko 1958). 14e. Stiavnické vrchy Mts.: Psiare, Krivín Hill (Futák 1943: 25; Májovsky et Jurko 1958; Jochi-mová 2011 in verb, subsp. bohemica?) - Zvolen, Vel'ky vrch Hill upper the Neresnická dolina Valley (Suza 1945: 5; Futák 1943: 28; Dostál & Cervenka 1992)
Doubtful locality: 16. Muránska planina Mts.: Vel'ká Stozka Hill, 1100-1250 m a. s. l. (So-ják 1958 PRC, subsp. bohemica).
General data (not maped): 10. Malé Karpaty Mts. (F. A. Novák 1954).