BULLSHIT.
Your article does NOT even suggest that this is common behavior. The article does mention three times that walrus prefer shallow water where they can reach the bottom to feed. It also states that walrus are at severe risk from climate change. An excerpt from your article:
Ecology and Behaviour
Walruses tend to prefer the pack ice to haul out for resting, but in the absence of ice they haul out on land. Preference for the pack encourages the animals to migrate following the advance of the ice: southwards in the fall and northwards in the spring. However, parts of the populations, largely males, do not participate in this migration and occupy the southern part of the range all year round.
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Normally, the southern edge of the pack ice would be over shallow water. The walrus could haul out there and feed. But as stated in the OP, that edge is now over deep water where the walrus cannot reach bottom and would starve if they tried to remain there.
The 35,000 walrus pulled out on this beach could easily represent 20% of the entire world's walrus population.
Your article does NOT even suggest that this is common behavior. The article does mention three times that walrus prefer shallow water where they can reach the bottom to feed. It also states that walrus are at severe risk from climate change. An excerpt from your article:
Ecology and Behaviour
Walruses tend to prefer the pack ice to haul out for resting, but in the absence of ice they haul out on land. Preference for the pack encourages the animals to migrate following the advance of the ice: southwards in the fall and northwards in the spring. However, parts of the populations, largely males, do not participate in this migration and occupy the southern part of the range all year round.
************************************************************************************
Normally, the southern edge of the pack ice would be over shallow water. The walrus could haul out there and feed. But as stated in the OP, that edge is now over deep water where the walrus cannot reach bottom and would starve if they tried to remain there.
The 35,000 walrus pulled out on this beach could easily represent 20% of the entire world's walrus population.