Naslov
Diversification of highland caddisflies from the subfamily Drusinae

Autori
Pauls, Steffen U. ; Graf, Wolfram ; Previšić, Ana ; Waringer, Johann

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

Izvornik
BioSystematics Berlin 2011 / - , 2011

Skup
BioSystematics Berlin 2011

Mjesto i datum
Berlin, Njemačka, 21.02.2011. - 27.02.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
cold-tolerant species; climate change; refugia; allopatric diversification; feeding ecology

Sažetak
Aquatic species are subject to a thermally buffered environment which allowed coldtolerant species to persist in permanently flowing streams and rivers in their ancestral range through periods of past climate change. The terrestrial environment in these refugia however varied dramatically over time. Changes in the terrestrial environment could have indirectly influenced abiotic and biotic environmental conditions of thermally buffered streams and rivers, and thus the microhabitat of aquatic insects. The Drusinae are a group of cold-adatped caddisflies, that live in permanent, fast-flowing spring brooks and headwater streams, and persisted in their current range and extra- Mediterranean refugia throughout the Pleistocene. We previously observed a shift in feeding ecology from shredders to grazers that promoted diversification of the Drusinae. We now test if the shift in feeding ecology and periods of increased diversification coincide with drier climates during the Pliocene and Pleistocene. The rationale is that during periods of drier climate there was 1) less suitable environment available, thus promoting allopatric diversification, and 2) the riparian habitat along streams was predominantly grass rather than trees and bushes. This latter aspect changed nutrient dynamics within headwater streams from systems dominated by allochtonous inputs to systems dominated by primary production. This shift could have promoted grazers, thus driving diversification within this functional feeding group within Drusinae. We use a phylogenetic framework to test these ideas.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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