TY  - JOUR
A1  - Ketmaier, Valerio
A1  - Marrone, Federico
A1  - Alfonso, Giuseppe
A1  - Paulus, Kirsten B.
A1  - Wiemann, Annika
A1  - Tiedemann, Ralph
A1  - Mura, Graziella
T1  - Mitochondrial DNA regionalism and historical demography in the extant populations of chirocephalus kerkyrensis (Branchiopoda: Anostraca)
JF  - PLoS one
N2  - Background: Mediterranean temporary water bodies are important reservoirs of biodiversity and host a unique assemblage of diapausing aquatic invertebrates. These environments are currently vanishing because of increasing human pressure. Chirocephalus kerkyrensis is a fairy shrimp typical of temporary water bodies in Mediterranean plain forests and has undergone a substantial decline in number of populations in recent years due to habitat loss. We assessed patterns of genetic connectivity and phylogeographic history in the seven extant populations of the species from Albania, Corfu Is. (Greece), Southern and Central Italy.
 Methodology/Principal Findings: We analyzed sequence variation at two mitochondrial DNA genes (Cytochrome Oxidase I and 16s rRNA) in all the known populations of C. kerkyrensis. We used multiple phylogenetic, phylogeographic and coalescence-based approaches to assess connectivity and historical demography across the whole distribution range of the species. C. kerkyrensis is genetically subdivided into three main mitochondrial lineages; two of them are geographically localized (Corfu Is. and Central Italy) and one encompasses a wide geographic area (Albania and Southern Italy). Most of the detected genetic variation (approximate to 81%) is apportioned among the aforementioned lineages.
 Conclusions/Significance: Multiple analyses of mismatch distributions consistently supported both past demographic and spatial expansions with the former predating the latter; demographic expansions were consistently placed during interglacial warm phases of the Pleistocene while spatial expansions were restricted to cold periods. Coalescence methods revealed a scenario of past isolation with low levels of gene flow in line with what is already known for other co-distributed fairy shrimps and suggest drift as the prevailing force in promoting local divergence. We recommend that these evolutionary trajectories should be taken in proper consideration in any effort aimed at protecting Mediterranean temporary water bodies.
Y1  - 2012
U6  - https://doi.org/10.1371/journal.pone.0030082
SN  - 1932-6203
VL  - 7
IS  - 2
PB  - PLoS
CY  - San Fransisco
ER  - 
TY  - JOUR
A1  - Wiemann, Annika
A1  - Andersen, Liselotte W.
A1  - Berggren, Per
A1  - Siebert, Ursula
A1  - Benke, Harald
A1  - Teilmann, Jonay
A1  - Lockyer, Christina
A1  - Pawliczka, Iwona
A1  - Skora, Krysztof
A1  - Roos, Aanna
A1  - Lyrholm, Thomas
A1  - Paulus, Kirsten B.
A1  - Ketmaier, Valerio
T1  - Mitochondrial Control Region and microsatellite analyses on harbour porpoise (Phocoena phocoena) unravel population differentiation in the Baltic Sea and adjacent waters
N2  - The population status of the harbour porpoise (Phocoena phocoena) in the Baltic area has been a continuous matter of debate. Here we present the by far most comprehensive genetic population structure assessment to date for this region, both with regard to geographic coverage and sample size: 497 porpoise samples from North Sea, Skagerrak, Kattegat, Belt Sea, and Inner Baltic Sea were sequenced at the mitochondrial Control Region and 305 of these specimens were typed at 15 polymorphic microsatellite loci. Samples were stratified according to sample type (stranding vs. by- caught), sex, and season (breeding vs. non-breeding season). Our data provide ample evidence for a population split between the Skagerrak and the Belt Sea, with a transition zone in the Kattegat area. Among other measures, this was particularly visible in significant frequency shifts of the most abundant mitochondrial haplotypes. A particular haplotype almost absent in the North Sea was the most abundant in Belt Sea and Inner Baltic Sea. Microsatellites yielded a similar pattern (i.e., turnover in occurrence of clusters identified by STRUCTURE). Moreover, a highly significant association between microsatellite assignment and unlinked mitochondrial haplotypes further indicates a split between North Sea and Baltic porpoises. For the Inner Baltic Sea, we consistently recovered a small, but significant separation from the Belt Sea population. Despite recent arguments that separation should exceed a predefined threshold before populations shall be managed separately, we argue in favour of precautionary acknowledging the Inner Baltic porpoises as a separate management unit, which should receive particular attention, as it is threatened by various factors, in particular local fishery measures.
Y1  - 2010
UR  - http://www.springerlink.com/content/105709
U6  - https://doi.org/10.1007/s10592-009-0023-x
SN  - 1566-0621
ER  - 
TY  - THES
A1  - Wiemann, Annika
T1  - Population genetics and social dynamics in harbour porpoises and bottlenose dolphins (Cetacea) : posibble implications for nature conservation
Y1  - 2009
CY  - Potsdam
ER  -