RT Journal Article
T1 Disparate dispersal limitation in Geomalacus slugs unveiled by the shape and slope of the genetic–spatial distance relationship
A1 Gómez Rodríguez, Carola
A1 Miller, Kirsten E.
A1 Castillejo Murillo, José
A1 Iglesias Piñeiro, Francisco Javier
A1 Baselga Fraga, Andrés
K1 Distance decay
K1 Geographic genetic structure
K1 Historic dispersal
K1 Incomplete range filling
K1 Power-law
K1 Terrestrial molluscs
AB Long‐term dispersal ability is a key species’ trait constraining species ranges and thus large‐scale biodiversity patterns. Here we infer the long‐term dispersal abilities of three Geomalacus (Gastropoda, Pulmonata) species from their range‐wide genetic–spatial distance relationships. This approach follows recent advances in statistical modelling of the analogous pattern at the community level: the distance decay in assemblage similarity. While linear relationships are expected for species with high long‐term dispersal abilities, asymptotic relationships are expected for those with more restricted mobility. We evaluated three functional forms (linear, negative exponential and power‐law) for the relationship between genetic distance (computed from mitochondrial cox1 sequences, n = 701) and spatial distance. Range fragmentation at present time and at the Last Glacial Maximum was also estimated based on the projection of climatic niches. The power‐law function best fit the relationship between genetic and spatial distances, suggesting strong dispersal limitation and long‐term population isolation in all three species. However, the differences in slope and explained variance pointed to disparities in dispersal ability among these weak dispersers. Phylogeographic patterns of Geomalacus species are thus largely driven by the same major process (i.e. dispersal limitation), operating at different strengths. This strong dispersal limitation results in geographic clustering of genetic diversity that makes these species highly vulnerable to genetic erosion due to climate chang
PB Wiley
YR 2020
FD 2020
LK http://hdl.handle.net/10347/23396
UL http://hdl.handle.net/10347/23396
LA eng
NO Gómez‐Rodríguez, C., Miller, K.E., Castillejo, J., Iglesias‐Piñeiro, J. and Baselga, A. (2020), Disparate dispersal limitation in Geomalacus slugs unveiled by the shape and slope of the genetic–spatial distance relationship. Ecography, 43: 1229-1240. doi:10.1111/ecog.05142
NO The authors were supported by the Spanish Ministry of Economy and Competitiveness and the European Regional Development Fund (ERDF) through grant CGL2016‐76637‐P and fellowship IJCI‐2014‐20881 to CG‐R
DS Minerva
RD 23 abr 2026