TY  - JOUR
A1  - Zarattini, Paola
A1  - Mura, Graziella
A1  - Ketmaier, Valerio
T1  - Intra-specific variability in the thirteen known populations of the fairy shrimp Chirocephalus ruffoi (Crustacea: Anostraca) -  resting egg morphometrics and mitochondrial DNA reveal decoupled patterns of deep divergence
JF  - Hydrobiologia : acta hydrobiologica, hydrographica, limnologica et protistologica
N2  - Chirocephalus ruffoi is a fairy shrimp endemic to the Italian peninsula, where it is known only from thirteen high mountain locations. Twelve of these are in the Northern Apennines while the thirteenth is about 700 km away in the Calabrian Apennines (Southern Italy). We quantified degree of genetic divergence within the species by sequencing a fragment of the mitochondrial DNA encoding for Cytochrome Oxidase I. We then combined genetic data with the re-analysis of two different datasets on the morphometrics of the resting eggs (cysts) produced by the species as an adaptation to survive seasonal droughts. Genetic data revealed profound divergence; we identified four clusters of haplotypes within the species phylogeography, three in the Northern Apennines and one in the Calabrian Apennines with most of the genetic variation (a parts per thousand 70%) being apportioned among haplogroups. We found high variability in cyst morphometrics, especially in cyst size and height of the spines ornamenting the surface. Genetic and morphometric data are decoupled suggesting that cyst morphology is either under selection or a plastic trait. We, therefore, caution against using cyst morphology for taxonomic purposes in anostracans.
KW  - Anostraca
KW  - Resting eggs
KW  - Morphometrics
KW  - Cytochrome oxidase I
KW  - Population structure
Y1  - 2013
U6  - https://doi.org/10.1007/s10750-013-1487-8
SN  - 0018-8158
VL  - 713
IS  - 1
SP  - 19
EP  - 34
PB  - Springer
CY  - Dordrecht
ER  - 
TY  - JOUR
A1  - Gemeinholzer, B.
A1  - May, F.
A1  - Ristow, Michael
A1  - Batsch, C.
A1  - Lauterbach, D.
T1  - Strong genetic differentiation on a fragmentation gradient among populations of the heterocarpic annual Catananche lutea L. (Asteraceae)
JF  - Plant systematics and evolution
N2  - In landscapes which are predominately characterised by agriculture, natural ecosystems are often reduced to a mosaic of scattered patches of natural vegetation. Species with formerly connected distribution ranges now have restricted gene flow among populations. This has isolating effects upon population structure, because species are often confined by their limited dispersal capabilities. In this study, we test the effects of habitat fragmentation, precipitation, and isolation of populations on the genetic structure (AFLP) and fitness of the Asteraceae Catananche lutea. Our study area is an agro-dominated ecosystem in the desert-Mediterranean transition zone of the Southern Judea Lowlands in Israel. Our analysis revealed an intermediate level of intra-population genetic diversity across the study site with reduced genetic diversity on smaller scale. Although the size of the whole study area was relatively small (20 x 45 km), we found isolation by distance to be effective. We detected a high level of genetic differentiation among populations but genetic structure did not reflect spatial patterns. Population genetic diversity was correlated neither with position along the precipitation gradient nor with different seed types or other plant fitness variables in C. lutea.
KW  - AFLP
KW  - Heterocarpy
KW  - Population structure
KW  - Precipitation gradient
KW  - Asteraceae
Y1  - 2012
U6  - https://doi.org/10.1007/s00606-012-0661-1
SN  - 0378-2697
VL  - 298
IS  - 8
SP  - 1585
EP  - 1596
PB  - Springer
CY  - Wien
ER  -