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:4/4/2017)... NEW YORK , April 4, 2017   ... solutions, today announced that the United States Patent and ... The patent broadly covers the linking of an iris ... the same transaction) and represents the company,s 45 th ... our latest patent is very timely given the multi-modal ...
(Date:3/29/2017)... the health IT company that operates the largest health ... today announced a Series B investment from BlueCross BlueShield ... investment and acquisition accelerates higi,s strategy to create the ... activities through the collection and workflow integration of ambient ... secures data today on behalf of over 36 million ...
(Date:3/23/2017)... , March 23, 2017 The report "Gesture Recognition and ... Industry, and Geography - Global Forecast to 2022", published by MarketsandMarkets, the market ... CAGR of 29.63% between 2017 and 2022. Continue ... ... ...
Breaking Biology News(10 mins):
(Date:9/20/2017)... Baltimore, MD (PRWEB) , ... September 20, 2017 ... ... for digital pathology, and Huron Digital Pathology , a provider of whole ... Association’s 2017 Pathology Visions conference . The workshop, entitled “Successfully Deploying a Best-in-Class ...
(Date:9/20/2017)... (PRWEB) , ... September 20, 2017 , ... From industry ... therapy succeeded after standard medicine failed. Many of these people had lost all hope. ... Regression Free Download (pdf) , “Neil takes readers on ...
(Date:9/20/2017)... ... September 20, 2017 , ... RoviSys, a leading independent ... the opening of an office in Taipei, Taiwan. This new location allows RoviSys ... developing new relationships in the region. Located in the Neihu area of Taipei, ...
(Date:9/19/2017)... ... 19, 2017 , ... Participants of this educational webinar will ... Along with the advantages and disadvantages of ductless, filtered fume hoods, they will ... laboratory. , Attendees will learn from an industry expert about the different types ...
Breaking Biology Technology: