Navigation Links
Fewer marten detections in California forest linked to decline in habitat
Date:10/24/2011

TAHOE NATIONAL FOREST, Calif.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 1980sa 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 thinningthe removal of downed woody material on the forest floormay 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 plateslong, 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.


'/>"/>

Contact: Sherri Eng
sleng@fs.fed.us
510-559-6327
USDA Forest Service - Pacific Southwest Research Station
Source:Eurekalert

Related biology news :

1. Cooked green vegetables, dried fruit, legumes, and brown rice associated with fewer colon polyps
2. Fewer aphids in organic crop fields
3. Fewer multiple births in states with insurance coverage for infertility
4. Erlotinib effective and with fewer side-effects after first-line treatment
5. Vet meds big shift to more women, fewer men driven by falling barriers, more female grads
6. Rapid growth in adolescence leads to fewer offspring, UC Riverside biologists find
7. Rise in new terror groups globally, fewer coordinated attacks, report finds
8. Kids now see fewer television ads for sweets and beverages, but more for fast food
9. Fragmented forests result in more snakes, fewer birds
10. Fewer honey bee colonies and beekeepers throughout Europe
11. Even small dietary reductions in salt could mean fewer heart attacks, strokes and deaths
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/26/2016)... 2016 Research and Markets has ... Market 2016-2020"  report to their offering.  , ,     ... The analysts forecast the global multimodal biometrics market ... the period 2016-2020.  Multimodal biometrics is ... as the healthcare, BFSI, transportation, automotive, and government ...
(Date:4/15/2016)... April 15, 2016  A new partnership announced ... accurate underwriting decisions in a fraction of the ... priced and high-value life insurance policies to consumers ... With Force Diagnostics, rapid testing (A1C, Cotinine ... readings (blood pressure, weight, pulse, BMI, and activity ...
(Date:4/14/2016)... Israel , April 14, 2016 ... Authentication and Malware Detection, today announced the appointment of ... assumed the new role. Goldwerger,s leadership appointment ... on the heels of the deployment of its platform ... BioCatch,s behavioral biometric technology, which discerns unique cognitive and ...
Breaking Biology News(10 mins):
(Date:5/19/2016)... -- There is no saying when exactly ... pressures in pricing and lack in consumer confidence. One ... - numerous opportunities are up for grabs but this ... four names in this sector: Portola Pharmaceuticals Inc. (NASDAQ: ... VTAE ), Anthera Pharmaceuticals Inc. (NASDAQ: ...
(Date:5/18/2016)... (PRWEB) , ... May 18, 2016 , ... Tech ... the Luis Villalobos Award to Cognition Therapeutics at the annual ACA Summit last week ... that is financed by one of ACA’s member angel groups. It is the highest ...
(Date:5/18/2016)... Washington, PA (PRWEB) , ... May 18, 2016 ... ... at least 1,200 hospitalizations are a direct result of asthma complications.* Costing more ... challenge across the country. , “For too many, the suffering ...
(Date:5/17/2016)... ... May 17, 2016 , ... DryLet, LLC, a biotechnology company ... it will be showcasing ManureMagic™ at booth V1061 at the World Pork Expo, ... Street Journal last year and more recently made news as the results were ...
Breaking Biology Technology: