but others can survive or feed only in certain climates. Take the polar bear, which depends on sea ice for hunting and mating. Scientists note that climate change is causing sea ice to disappear at an alarming rate, threatening the polar bear's survival. Losing the polar bear, as well as...
Dr. Silber – Polar Bears and Glaciers Dr. Silber – Reflections of Africa Exploring Darwin’s Galapagos with Dr. Silber Reproduction and Calving Season in Africa Playing with The Grizzlies: Before Pebble Mine Destroys Our Wilderness Penguin Reproductive Behavior Dr. Silber – Reflections on...
Why You Should Be Scared:Asian black bears are typically not aggressive, tending to favor shy behavior and caution around humans. They can become aggressive if threatened and are more aggressive than other brown bear species across Eurasia. When threatened, they can become incredibly savage and vic...
Keystone species are species that help hold an ecosystem together, like glue. Even if they don't interact directly with other species, their behavior helps keep all the populations in homeostasis.Answer and Explanation: Grizzly bears are a keystone species because they help move nutrients through ...
A species whose presence, absence, or relative well-being in a given environment is a sign of the overall health of its ecosystem. By monitoring the condition and behavior of an indicator species, scientists can determine how changes in the environment are likely to affect other species that ar...
The mere presence of apex predators can alter the behavior of other animals. Prey species may change their grazing patterns and habitats to avoid predation, a phenomenon known as the ‘landscape of fear.’ This, in turn, shapes the vegetation and physical aspects of their habitat. When wolves...
As we discussed above, these owls must perform this hunting behavior in light levels at or below the minimum they can detect (Figure 2). How do they manage then to fly and capture prey in the forest at night? Part of the answer lies in their exquisite hearing: many owls, notably the ...
Bear Island Trough, however, is the deepest point of the Barents Sea. An alternative explanation might be the large variations of current velocities of the area (Ingvaldsen, Asplin, & Loeng, 2004) and the potentially associated turbidity that might constraint this species movement or predation. ...
We used mlRho v2.943to estimate the heterozygosity of modern mammals: dugong—D. dugon, beluga whale—D. leucas, polar bear—U. maritimus, walrus—O. rosmarus, and narwhal—M. monoceros; and extinct mammals: two specimens of woolly mammoth (M. primigenius) from Oimyakon (the Late Pleistoce...
91. The Red Colobus Monkeys: Variation In Demography, Behavior, And Ecology Of Endangered Species. 92. The group's Doug Honnold told the Idaho Statesman newspaper: "It's the endangered species that need to be protected, not the states' rights to kill wolves." 93. It would deeply affect ...