Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Scientists map out potential for restoring California fisher populations

14.01.2008
Study examines possible reintroduction efforts for elusive carnivore

U.S. Forest Service and U.C. Santa Barbara scientists believe they have identified the habitat needs for Pacific fishers, a rare California mammal that is a candidate for reintroduction efforts and listing under the Endangered Species Act.

Their findings were published in the current edition of Ecological Applications and focused on the state’s two remaining fisher populations. Land managers can apply the research to examine areas for reintroduction, identify barriers to natural dispersal, plan habitat restoration and explore climate change implications.

Fishers are weasel-like mammals weighing 4 to 13 pounds that have declined the past 150 years because of trapping, logging and fires. They were once found in much of the West, but now only live in parts of California, Oregon, Idaho and Montana.

California fishers occupy less than half their historic range. Remnant populations in the southern Sierra Nevada Mountains live more than 250 miles from the nearest populations in northwestern California.

Dr. Frank Davis of the Donald Bren School of Environmental Science and Management at U.C. Santa Barbara led the research, which compared where fishers now live in California and the environmental factors influencing their distribution. The information is critical because California Department of Fish and Game managers are considering reintroducing the secretive carnivore to parts of the state.

The data suggests potential habitat in the central and northern Sierra Nevada Mountains is limited to a few areas in densely-forested river canyons, according to Dr. William Zielinski, a U.S. Forest Service research ecologist at the Pacific Southwest Research Station’s Arcata, Calif., lab and one of the study’s authors.

These areas are smaller and less connected than where California fishers currently live. The study suggested caution in implementing reintroduction efforts in the northern Sierra Nevada Mountains and additional analyses to determine if these areas could sustain a viable population.

But, it also found the northern Sierra Nevada Mountains to be the most likely settling place for fishers that might naturally disperse south and east from the northwestern California population. Wildlife biologists might therefore consider concentrating future fisher detection efforts here.

Zielinski said scientists have never reintroduced fishers into California forests. Reintroductions will be more successful if scientists repeatedly release fishers in the same area for several years, he said.

Bill Zielinski | EurekAlert!
Further information:
http://www.fs.fed.us
http://www.esajournals.org/perlserv/?request=get-document&doi=10.1890%2F06-1484.1

More articles from Ecology, The Environment and Conservation:

nachricht Project provides information on energy recovery from agricultural residues in Germany and China
13.02.2020 | Deutsches Biomasseforschungszentrum

nachricht New exhaust gas measurement registers ultrafine pollutant particles for the first time
21.01.2020 | Technische Universität Graz

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A step towards controlling spin-dependent petahertz electronics by material defects

The operational speed of semiconductors in various electronic and optoelectronic devices is limited to several gigahertz (a billion oscillations per second). This constrains the upper limit of the operational speed of computing. Now researchers from the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg, Germany, and the Indian Institute of Technology in Bombay have explained how these processes can be sped up through the use of light waves and defected solid materials.

Light waves perform several hundred trillion oscillations per second. Hence, it is natural to envision employing light oscillations to drive the electronic...

Im Focus: Freiburg researcher investigate the origins of surface texture

Most natural and artificial surfaces are rough: metals and even glasses that appear smooth to the naked eye can look like jagged mountain ranges under the microscope. There is currently no uniform theory about the origin of this roughness despite it being observed on all scales, from the atomic to the tectonic. Scientists suspect that the rough surface is formed by irreversible plastic deformation that occurs in many processes of mechanical machining of components such as milling.

Prof. Dr. Lars Pastewka from the Simulation group at the Department of Microsystems Engineering at the University of Freiburg and his team have simulated such...

Im Focus: Skyrmions like it hot: Spin structures are controllable even at high temperatures

Investigation of the temperature dependence of the skyrmion Hall effect reveals further insights into possible new data storage devices

The joint research project of Johannes Gutenberg University Mainz (JGU) and the Massachusetts Institute of Technology (MIT) that had previously demonstrated...

Im Focus: Making the internet more energy efficient through systemic optimization

Researchers at Chalmers University of Technology, Sweden, recently completed a 5-year research project looking at how to make fibre optic communications systems more energy efficient. Among their proposals are smart, error-correcting data chip circuits, which they refined to be 10 times less energy consumptive. The project has yielded several scientific articles, in publications including Nature Communications.

Streaming films and music, scrolling through social media, and using cloud-based storage services are everyday activities now.

Im Focus: New synthesis methods enhance 3D chemical space for drug discovery

After helping develop a new approach for organic synthesis -- carbon-hydrogen functionalization -- scientists at Emory University are now showing how this approach may apply to drug discovery. Nature Catalysis published their most recent work -- a streamlined process for making a three-dimensional scaffold of keen interest to the pharmaceutical industry.

"Our tools open up whole new chemical space for potential drug targets," says Huw Davies, Emory professor of organic chemistry and senior author of the paper.

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

70th Lindau Nobel Laureate Meeting: Around 70 Laureates set to meet with young scientists from approx. 100 countries

12.02.2020 | Event News

11th Advanced Battery Power Conference, March 24-25, 2020 in Münster/Germany

16.01.2020 | Event News

Laser Colloquium Hydrogen LKH2: fast and reliable fuel cell manufacturing

15.01.2020 | Event News

 
Latest News

Active droplets

21.02.2020 | Medical Engineering

Finding new clues to brain cancer treatment

21.02.2020 | Health and Medicine

Beyond the brim, Sombrero Galaxy's halo suggests turbulent past

21.02.2020 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>