Population fluctuations can have a pronounced effect on genetic diversity, behavioral adaptations, and population viability in small mammals. Little is known as to how genetic diversity is associated with population dynamics, and whether genetic bottlenecks or genetic resilience occur in fluctuating populations of small rodents. Using DNA microsatellites and 6 years of data, we investigated changes in genetic diversity of the greater long-tailed hamster (Tscherskia triton) at 2 sites in the North China Plain. Genetic diversity was measured as mean number of alleles per locus (Na), allelic richness (A), expected heterozygosity (HE), and observed heterozygosity (HO). Genetic diversity changed rapidly with changes in population density, and the relationship was positive. A bottleneck effect was detected only in some low-density years. Our results demonstrate an obvious genetic resilience and capacity for recovery in this species. We discuss this pattern in the context of dispersal and other behaviors of greater long-tailed hamsters, and how agriculture-related disturbance affects their genetic diversity.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 91 • No. 1