Naslov
Zooplankton populations isolated in marine lakes: Natural laboratories of evolution?

Autori
Peijnenburg, Katja T. C. A. ; Batistić, Mirna ; Becking, Lisa E. ; Garić, Rade

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

Izvornik
Population Connections, Community Dynamics, and Climate Variability / Keister, Julie ; Bonnet, Delphine ; Escribano, Ruben - Pucón, 2011, 101-101

Skup
5th International Zooplankton Production Symposium

Mjesto i datum
Pucón, Čile, 14.03.2011. - 18.03.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
marine lakes; Sagitta setosa; Calanus helgolandicus; fast evolution; zooplankton

Sažetak
Little is known about how pelagic (open ocean) biodiversity is created and maintained. Understanding evolutionary processes in the open sea is particularly difficult because barriers to migration are often obscure and fossil records are typically lacking. We have studied populations of the copepod Calanus helgolandicus and the chaetognath Sagitta setosa isolated in marine lakes in Ireland and Croatia. Marine lakes provide extraordinary opportunities to study evolution of zooplankton because populations have invaded these lakes by known flooding events (during the Holocene) from ancestral populations in the adjacent sea. Preliminary results (based on mitochondrial gene sequences) suggest that zooplankton populations in the Irish lakes are not significantly isolated from the adjacent sea, whereas populations in Croatian lakes are strongly differentiated. Furthermore, we found strong evidence of fast adaptive evolution of S. setosa populations isolated in the Croatian lakes based on morphometric (17 measurements), nuclear DNA (four microsatellites), and mitochondrial DNA (two genes) data. These findings force a careful re-evaluation of the tempo and mode of marine zooplankton evolution.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA