Human impact in naturally patched small populations: genetic structure and conservation of the burrowing rodent, tuco-tuco (Ctenomys lami)

The Journal of Heredity
Carla M Lopes, T R de Freitas

Abstract

Isolated or semi-isolated small populations are commonly found among species, due to a naturally patchy occupancy of suitable habitats or also as a result of habitat alterations. These populations are subject to an increased risk of local extinction because they are more vulnerable to demographic, genetic, and environmental stochasticity. Considering that natural areas have been becoming progressively more fragmented and smaller, understanding the genetic structure and evolutionary dynamics of small populations is critical. Ctenomys lami has 26 karyotypes distributed in a small area (936 km(2)) continually modified by human actions. We assessed the genetic geographical structure of this species, examining 178 specimens sampled on a fine scale, using information from chromosomal variability, mitochondrial DNA control region and cytochrome c oxidase subunit I sequences, and 14 microsatellite loci. The observed isolation-by-distance pattern and a clinal genetic variation suggest a stepping-stone population model. The results did not indicate genetic structuring associated with distinct karyotypes. However, mitochondrial and nuclear molecular markers demonstrated the existence of 2 demes, which are not completely isolated but are p...Continue Reading

References

Nov 1, 1989·The Journal of Psychology·A S Luchins
Aug 1, 1989·Proceedings of the National Academy of Sciences of the United States of America·T D KocherA C Wilson
Jan 20, 1989·Deutsche medizinische Wochenschrift·R Müller-Gerharz, R Zapf
Nov 20, 2002·Cytogenetic and Genome Research·M D GiménezJ B Searle
Mar 26, 2003·Cardiovascular Research·Robert H G SchwingerKeld Kjeldsen
Nov 3, 2004·Genetics·Gilles GuillotJean François Cosson
May 10, 2007·Molecular Biology and Evolution·Koichiro TamuraSudhir Kumar
Feb 19, 2008·Brazilian Journal of Biology = Revista Brasleira De Biologia·F A FernandesT R O Freitas
Oct 1, 1994·Trends in Ecology & Evolution·C Moritz
Jan 1, 2008·Molecular Ecology Resources·François Rousset

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Citations

Feb 1, 2020·Scientific Reports·Bruno Busnello KubiakThales Renato Ochotorena de Freitas

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