New study shows mountain lions dispersing from Nevada to California

Oct 09, 2012
This is a female mountain lion captured and collared in western Nevada for the field component of study. Credit: Jake Willers

Using data collected over the course of seven years, the study looked at DNA in tissue samples collected from 739 mountain lions. In the first-of-its-kind study at this scale, the authors used only the gathered genetic information to discover population structures and history, and to identify what areas in the region serve as "sinks" (habitat that animals move to at a greater rate than they disperse from) and "sources" (areas that animals disperse from at a greater rate to live elsewhere).

The study, "Identification of Source-Sink Dynamics in Mountain Lions of the Great Basin" appears online in August's early-view edition of the journal Molecular Ecology. Authors of the study include: Alyson M. Andreasen of the University of Nevada; Jon P. Beckmann of WCS; and Matthew L. Forester, William S. Longland, and Kelley M. Stewart of the University of Nevada.

The scientists expected to see an influx of lions from California, where lions are not hunted, into Nevada where mountain lion hunting is allowed and leaves vacant territories for outside lions to claim. The opposite occurred. Lions mostly moved in a north and south direction following the topography of the many mountain ranges throughout the area, resulting in distinct genetic populations. However, when moving between populations in an east or west direction, the results suggested that more lions moved west from Central Nevada to the mountains of the , than vice versa—potentially taking advantage of better habitat quality.

Study author and University of Nevada PhD student Alyson Andreasen said, "The results are surprising and telling in that in most situations where you have hunting, the animals move in the direction of the resultant vacant territories. While this appears to be occurring in other areas of the state, habitat differences between the Sierra Nevada and the arid may be attracting dispersal age mountain lions west into California whereas the abrupt ecotone may act as a barrier for lions residing in the Sierra Nevada."

Study co-author and WCS Scientist Jon Beckmann said, "In this case, a hunted population is the source for the non-hunted/protected population. This is somewhat counterintuitive: Some might think that in remote mountainous terrain of Nevada, the impacts of hunting on lion populations would outweigh those associated with more people and roadways in the Sierra of California but this appears to not be the case."

The scientists are currently working on questions arising from this study and on studies to discern how interact with other species and select habitat in the region.

Explore further: Adjusting wind power production during migration season saves bats

add to favorites email to friend print save as pdf

Related Stories

Origin of the Blue Mountains studied

Oct 30, 2007

A U.S. study suggests northern Oregon's Blue Mountains may have originated from the Klamath Mountains of southern Oregon and the Sierra Nevada of California.

Wild cats roam the Tucson Mountains

Oct 22, 2010

(PhysOrg.com) -- For the first time, mountain lions and bobcats have been photographed as part of an in-depth monitoring study in the Tucson Mountains, a small island of habitat facing increasing segregation ...

Recommended for you

Reducing pesticides and boosting harvests

20 hours ago

Scientists in Italy are experimenting with sound vibrations to replace pesticides. Adapting different eco-friendly methods they are able to boost harvests and open up a new chapter in sustainable farming.

Native vegetation makes a comeback on Santa Cruz Island

20 hours ago

On islands, imported plants and animals can spell ecological disaster. The Aleutians, the Galápagos, the Falklands, Hawaii, and countless other archipelagoes have seen species such as rats, goats, brown ...

Power lines offer environmental benefits

21 hours ago

Power lines, long considered eyesores or worse, a potential threat to human health, actually serve a vital role in maintaining the health of a significant population, according to new research out of the ...

User comments : 0