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!
How does the loss of species alter ecosystems?
18.05.2017 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig
Excess diesel emissions bring global health & environmental impacts
16.05.2017 | International Institute for Applied Systems Analysis (IIASA)
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
26.05.2017 | Life Sciences
26.05.2017 | Life Sciences
26.05.2017 | Physics and Astronomy