what role do the bears discussed above play in maintaining ecological balance?
The relationship between ringed seals and polar bears is so close that the abundance of ringed seals in some areas appears to regulate the density of polar bears, while polar bear predation in turn regulates density and reproductive success of ringed seals.
Polar bear
The relationship between ringed seals and polar bears is so close that the abundance of ringed seals in some areas appears to regulate the density of polar bears, while polar bear predation in turn regulates density and reproductive success of ringed seals
where did the polar bear live with her family In the Arctic Circle, encompassing the Arctic Ocean what do they eat? ringed and bearded seals are they very strict about their diet? No. in what way? They consume a wide variety of other wild foods, including muskox birds, eggs, rodents, crabs, other crustaceans and other polar bears. did these birds exist since prehistoric days? UNANSWERABLE does the first animal has any links to prehistoric period? Yes, during the Pleistocene period, muskoxen were much more widespread. what are the names of their extinct relatives? "Euceratherium",  "Soergelia",  "Praeovibos", etc. what is the first one? A shrub-ox that is an extinct genus and species of ovibovine caprine native to North America
wiki:25639091
Polar bear [SEP] Ecological role
The polar bear is the apex predator within its range, and is a keystone species for the Arctic. Several animal species, particularly Arctic foxes ("Vulpes lagopus") and glaucous gulls ("Larus hyperboreus"), routinely scavenge polar bear kills. The relationship between ringed seals and polar bears is so close that the abundance of ringed seals in some areas appears to regulate the density of polar bears, while polar bear predation in turn regulates density and reproductive success of ringed seals. The evolutionary pressure of polar bear predation on seals probably accounts for some significant differences between Arctic and Antarctic seals. Compared to the Antarctic, where there is no major surface predator, Arctic seals use more breathing holes per individual, appear more restless when hauled out on the ice, and rarely defecate on the ice.