Naslov
Karstification and micro-scale vicariance - diversification of stream insects in the Dinaric western Balkan

Autori
Previšić, Ana ; Schnitzler, Jan ; Kučinić, Mladen ; Graf, Wolfram ; Ibrahimi, Halil ; Kerovec, Mladen ; Pauls, Steffen U.

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

Izvornik
BalkBioDiv Consortium and Croatian Botanical Society. International Symposium on "Evolution of Balkan Biodiversity" / Rešetnik, Ivana ; Bogdanović, Sandro ; Alegro, Antun - Zagreb, 2012

Skup
International Symposium on "Evolution of Balkan Biodiversity"

Mjesto i datum
Zagreb, Hrvatska, 28.06.2012. - 30.06.2012

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
karstification; divergence; caddisflies; Drusinae

Sažetak
The Dinaric western Balkan karst area is a European biodiversity hotspot with particularly high degrees of endemism in the freshwater and subterranean fauna. For animals inhabiting surface waters karst development results in increased fragmentation of habitats. The reduction of surface waters and parallel development of higher energy relief may drive small scale vicariance of aquatic insect populations. We hypothesise that karstification mediated fragmentation of suitable surface water habitats for caddisflies and drove small scale vicariant diversification in the region. Using mtDNA sequence data, we apply a comparative phylogeographic approach to analyse population genetic structure of four ecologically similar Drusus species (Trichoptera, Limnephilidae) with different distribution ranges, date intra- and interspecific divergence of our target species, and link our findings with geological events. We observed marked differences in population genetic structure of our target species: three range-restricted endemics exhibited extremely high intraregional population differentiation dating to the late Pliocene/Pleistocene ; the widespread species had shallower divergence (Pleistocene) among regional clades of polyphyletic origin. These results suggest that the population histories of the endemic species differ from those of the more widespread species: populations of the endemic species differentiated within the study area due to regional fragmentation, potentially resulting from intensified karstification ; whereas the more widespread species repeatedly colonised the region from different sources.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA