Taking the long view: examining factors which influence Northern Spotted Owls

igh survival and successful reproductive output for the owls contained a mixture of old growth forest and other vegetation types. Interior old growth forest allowed for better bird survival, possibly providing them with an area in which to hide from predators, such as the Great Horned Owl (Bubo virginianus). Great Horned Owls primarily depend upon their sense of sight when hunting, and so the darker areas of the forest provide Spotted Owls with ample hiding places.

But an uneven edge between old growth forest and other vegetation types promoted higher reproduction rates and was also an important part of the Spotted Owls' territories. These edge areas can be abundant with dusky-footed woodrats, the primary prey species for Spotted Owls. Thus a mosaic of mature and old growth forest interspersed with other vegetation types may be very beneficial to the birds, at least in Northwestern California.

In the area of this study, this mosaic appeared to provide the highest quality habitat. In addition, those individuals living in these high quality habitats had a much better chance of surviving unfavorable weather. Those in poorer quality habitat showed a survival rate decrease of as much as 26 percent in cold, wet years. Good quality habitat buffered owls during the unfavorable weather periods much better than did poor quality habitat.

The researchers assert, however, that current logging practices do not generate the type of mosaic observed to be best for the owls. Logging clearcuts are currently conducted by making large, regularly shaped patches with clean edges.

Past forest disturbances, the researchers point out, were governed primarily by wildfires, not logging. Wildfires tend to leave smaller, irregularly shaped patches with uneven edges. Fire disturbance also leaves a variety of successional stages based upon the frequency of low, moderate and severe burns over time. In contras

Contact: Alison Gillespie
202-833-8773 ext 211
Ecological Society of America

Page: 1 2 3 4

Related biology news :

1. Taking aim at bioterrorism: UH professor gets HHS funding to battle anthrax
2. Taking the show on the road - Leading researchers to conduct hands-on science symposium for 500 San Francisco area high school students
3. Taking the pulse of giants: Detecting change and its consequences in western mountain ecosystems
4. Taking vitamin supplements is a common behavior in the U.S.
5. Taking a SNP in the gene pool: Scientists harvest human gene differences
6. Taking The Animal Out Of Animal Testing
7. Possible Dangers Of Taking Over-The-Counter Medications For Hepatitis C Patients
8. National Science Foundation Is Taking Small Business Into A New Phase Of Innovation
9. Digging In And Taking Cover
10. Taking The "Ouch" Out Of Needles: Arrays Of "Microneedles" Offer New Technique For Drug Delivery
11. Intake Of Acetaminophen Increases Risk Of Excessive Anticoagulation In Patients Taking Warfarin

Post Your Comments:

(Date:11/27/2019)... ... ... Though the forecast for the Thanksgiving holiday might look a bit grim, ... the roads and the skies. It’s a new personal recipe organizer app called MINE ... simple design, mouth-watering pictures of food, an optional social component and an easy-to-navigate recipe ...
(Date:11/22/2019)... ... 21, 2019 , ... The inventors of a new and ... major step forward with that therapy, known as SurVaxM. MimiVax LLC principals Robert ... from Roswell Park in 2012, has entered into a China-exclusive licensing agreement for ...
(Date:11/19/2019)... (PRWEB) , ... November 19, 2019 , ... The inaugural ... Times Square in New York City. The one-day event will be chaired by Dr ... of leaders in the space. , “We are witnessing significant innovation in cell ...
Breaking Biology News(10 mins):
(Date:12/18/2019)... , ... December 17, 2019 , ... ... is pleased to announce that it has hired Dr. Alia Orbin, Ph.D., ... Orbin is experienced in the preparation, filing and prosecution of patent applications related ...
(Date:12/4/2019)... ... 03, 2019 , ... A new survey by MedReps ( http://www.medreps.com ), a ... overall best medical sales companies to work for in 2020. , The ... professionals from the MedReps community to identify which medical sales companies are currently the ...
(Date:12/4/2019)... Indiana (PRWEB) , ... December 04, 2019 , ... ... strategy to further enhance dissolution and stabilize amorphous materials. Additionally, their PDF Synchrotron ... enhance the ability to describe these compositions both in regulatory and patent applications.  ...
(Date:11/22/2019)... (PRWEB) , ... November 22, ... ... chain engineering firm, hosted a live webinar covering a step-by-step cold chain ... antibodies, antibody-drug conjugates, and cell therapies. Targeting complex cold chain biopharmaceutical industry ...
Breaking Biology Technology:
Cached News: