Naslov
Biogeography of the Adriatic Orthoptera

Autori
Skejo, Josip ; Jelinčić, Antun ; Adžić, Karmela ; Deranja, Maks ; Pavlović, Marko ; Mihaljević, Maja ; Muhammad, Amira Aquilah ; Rebrina, Fran

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

Izvornik
European Congress on Orthoptera Conservation (ECOCIII) 1-2 April 2022 Leiden (The Netherlands) Program / - , 2022, 33-33

Skup
European Congress on Orthoptera Conservation (ECOCIII 2022)

Mjesto i datum
Liblice, Češka Republika, 01.04.2022. - 02.04.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Adriatic Sea ; relict species ; endemics ; species divergences ; biogeographic analyses

Sažetak
Being the northernmost Mediterranean bay, the Adriatic Sea has evolved into a unique biogeographic unit. The region covers eastern Italy in the west, and Slovenia, Croatia, Bosnia & Herzegovina, Montenegro, and Albania in the east. Only 13000 years ago, the Adriatic was a large valley with many mountains, whose highlands and peaks today represent islands and coasts. A lot of relict species, such as Epacromius coerulipes and E. tergestinus, have witnessed the formation of the Adriatic Sea by great post-glacial floods. Cycles of drying up and flooding were the signature events which shaped the biogeographical patterns of the Adriatic grasshoppers and crickets. Examples of unusually fragmented distributions include species with distinct northern and southern subpopulations (e.g., Andreiniimon nuptialis and Barbitistes ocskayi), and those with distinct eastern (Apennine) and western (Balkan) subpopulations, such as Barbitistes yersini, Platycleis escalerai, Poecilimon jonicus, or the complex of brachypterous Tesellana species (T. carinata, T. orina, T. nigrosignata). Furthermore, this area is characterized by endemic species, such as Barbitistes kaltenbachi, Bicolorana kraussi, Pseudoprumna baldensis, Rhacocleis buchichii, R. japygia, Roeseliana brunneri, Uromenus dyrrhachiacus, and Zeuneriana marmorata. These distributional patterns can, naturally, be explained by geological events in the Adriatic basin. Starting with the formation of Paratethys Ocean ~34 mya, through the Messinian salinity crisis ~5, 96 mya, the Zanclean flood ~5, 33 mya, decreasing sea level during the last glacial period, and another flood in the Adriatic basin as a consequence of ice melting which started around ~18 000 years ago, many events conditioned the current distribution patterns of the Adriatic Orthoptera. Correct timing of species divergences is important for the interpretation of speciation during the aforementioned events. For now, only a few case studies on trans-Adriatic taxa have been published. Examples of the known cases are the speciation in Troglophilus and Eupholidoptera, which took place ~5-3 mya and a few hundred thousand years ago, respectively. The most recent divergences, such as those of the subpopulations of B. yersini or P. jonicus, probably occurred after the last glaciation, whereas the older ones occurred after the Messinian salinity crisis (during the Zanclean flood). The oldest relicts originate from the period of the Paratethys Ocean formation. In order to better understand the history of speciation in the Adriatic, phylogeographic studies are planned, while biogeographic analyses are currently taking place.

Izvorni jezik
Engleski

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