Bear News: Web of Life, Two kinds of Bears, Birds, Berries, and squirrels

Alex Wierbinski's picture

By Alex Wierbinski - Posted on 18 January 2018


Bear News
Operating Within A Complex Web of Life

Two kinds of Bears, Birds, Berries, and squirrels...

Great scat! Bears -- not birds -- are the chief seed dispersers in Alaska,
Oregon State University, January 16, 2018.

Web of Life
Two kinds of Bears, Birds, Berries, and squirrels too...

"...bears, while foraging, can disperse through their scat about 200,000 devil’s club seeds per square kilometer per hour. Rodents then scatter and hoard those seeds, much like squirrels hoard acorns. "

"This is the first instance of a temperate plant being primarily dispersed by mammals through their gut, and suggests that bears may influence plant composition in the Pacific Northwest."

"The researchers found that in the study area along the Chilkat and Klehini rivers in southeastern Alaska, brown bears dispersed the most seeds..."

"... later in the season, black bears moved in and took over the role as principal seed dispersers. Black bears are subordinate to brown bears and avoid them."



Another example of interdependent behaviors:

The Complex Webs we Warp

Bear & Squirrel

Do squirrels teach bears to cross the railroad? Grizzlies dig squirrel middens for grains,
PENSOFT PUBLISHERS, August 30. 2017.



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