Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Fewer Marten Detections in California Forest Linked to Decline in Habitat

25.10.2011
Pacific Southwest Research Station/USDA Forest Service
Science that makes a difference. . .

The reclusive American marten is getting even harder to find in the Sierra Nevada, according to a study by a team of researchers from the U.S. Forest Service and Oregon State University. A new study at the Sagehen Experimental Forest found that marten detections have dropped 60 percent since the 1980s—a decrease that may be caused by a degradation of the wooded areas in which they live, researchers say. Their findings appeared in the current issue of the Journal of Wildlife Management.

“Previous work had revealed that marten populations in the northern Sierra and southern Cascades in California have become more fragmented since the early 1900s, but the current work at Sagehen may help explain the mechanism for this pattern,” says co-author Bill Zielinski, research ecologist for the USDA Forest Service’s Pacific Southwest Research Station in Arcata, Calif.

In the early 1900s, American marten could be found in many continuous areas in the higher elevations of the northern Sierra Nevada. Today, populations of the small mammal, which is related to the weasel family and looks like a cross between a mink and a fox, are isolated and discontinuous. Causes for this phenomenon are unclear, but researchers believe that timber harvesting and thinning—the removal of downed woody material on the forest floor—may play a part in the population decline.

The Sagehen Experimental Forest is located in the Tahoe National Forest about 30 miles north of Lake Tahoe and is managed by the Pacific Southwest Research Station and the University of California, Berkeley. Researchers recorded marten detections using track plates—long, baited rectangular boxes which martens enter and leave their tracks on contact paper. The data, which was collected in 2007 and 2008, was then compared to survey results from 1980 to 1993.

“We’ve estimated that there has been about a 25 percent loss in suitable habitat for martens since the 1980s,” says lead author and Oregon State University researcher Katie Moriarty. In their journal article, the authors cite the loss of prime marten habitat in the Sagehen Experimental Forest of more than 270 hectares, or nearly 700 acres.

Based on the results of their findings, the research team suggests the following land management strategies for preserving marten habitat:

Retain the remaining patches of old-growth forest habitat, especially near streams and retain patches of fir in the upper elevations.
Retain corridors of dense, old forest between areas where fire considerations make it is necessary to reduce the forest density (i.e., "thin" the forest).

Strive for an approach to forest management that retains old, dead and malformed trees and logs because of their important value as refuges for martens and as habitat for their prey.

Read the full article.
http://www.fs.fed.us/psw/publications/zielinski/psw_2011_zielinski002(moriarty).pdf

Headquartered in Albany, Calif., the Pacific Southwest Research develops and communicates science needed to sustain forest ecosystems and other benefits to society. It has laboratories and research centers in California, Hawaii and the U.S.-affiliated Pacific Islands. For more information, visit www.fs.fed.us/psw/.

Sherri Eng | EurekAlert!
Further information:
http://www.fs.fed.us

Further reports about: Forest Service Nevada Pacific coral Sierra Southwest forest ecosystem habitat

More articles from Agricultural and Forestry Science:

nachricht Are cover crops negatively impacting row crops?
30.07.2020 | American Society of Agronomy

nachricht Space to grow, or grow in space -- how vertical farms could be ready to take-off
14.07.2020 | John Innes Centre

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

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

Im Focus: ScanCut project completed: laser cutting enables more intricate plug connector designs

Scientists at the Fraunhofer Institute for Laser Technology ILT have come up with a striking new addition to contact stamping technologies in the ERDF research project ScanCut. In collaboration with industry partners from North Rhine-Westphalia, the Aachen-based team of researchers developed a hybrid manufacturing process for the laser cutting of thin-walled metal strips. This new process makes it possible to fabricate even the tiniest details of contact parts in an eco-friendly, high-precision and efficient manner.

Plug connectors are tiny and, at first glance, unremarkable – yet modern vehicles would be unable to function without them. Several thousand plug connectors...

Im Focus: New Strategy Against Osteoporosis

An international research team has found a new approach that may be able to reduce bone loss in osteoporosis and maintain bone health.

Osteoporosis is the most common age-related bone disease which affects hundreds of millions of individuals worldwide. It is estimated that one in three women...

Im Focus: AI & single-cell genomics

New software predicts cell fate

Traditional single-cell sequencing methods help to reveal insights about cellular differences and functions - but they do this with static snapshots only...

Im Focus: TU Graz Researchers synthesize nanoparticles tailored for special applications

“Core-shell” clusters pave the way for new efficient nanomaterials that make catalysts, magnetic and laser sensors or measuring devices for detecting electromagnetic radiation more efficient.

Whether in innovative high-tech materials, more powerful computer chips, pharmaceuticals or in the field of renewable energies, nanoparticles – smallest...

Im Focus: Tailored light inspired by nature

An international research team with Prof. Cornelia Denz from the Institute of Applied Physics at the University of Münster develop for the first time light fields using caustics that do not change during propagation. With the new method, the physicists cleverly exploit light structures that can be seen in rainbows or when light is transmitted through drinking glasses.

Modern applications as high resolution microsopy or micro- or nanoscale material processing require customized laser beams that do not change during...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“Conference on Laser Polishing – LaP 2020”: The final touches for surfaces

23.07.2020 | Event News

Conference radar for cybersecurity

21.07.2020 | Event News

Contact Tracing Apps against COVID-19: German National Academy Leopoldina hosts international virtual panel discussion

07.07.2020 | Event News

 
Latest News

Rare Earth Elements in Norwegian Fjords?

06.08.2020 | Earth Sciences

Anode material for safe batteries with a long cycle life

06.08.2020 | Power and Electrical Engineering

Turning carbon dioxide into liquid fuel

06.08.2020 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>