What satellites can tell us about how animals will fare in a changing climate

What satellites can tell us about how animals will fare in a changing climate.
The presenters discussed how changes in Arctic sea ice cover have helped scientists predict a 30 percent drop in the global population of polar bears over the next 35 years.
"When we look forward several decades, climate models predict such profound loss of Arctic sea ice that there’s little doubt this will negatively affect polar bears throughout much of their range, because of their critical dependence on sea ice," said Kristin Laidre, a researcher at the University of Washington’s Polar Science Center in Seattle and co-author of a study on projections of the global polar bear population.
He found that there is a very strong relationship between plant productivity and deer and mountain lion density.
For mountain lions, it’s even worse," Stoner said.
Using maps of vegetation productivity during a severe drought that occurred in the southwestern United States in 2002, Stoner modeled what would be the deer and mountain lion distribution and abundance, should extreme drought become the norm.
"Using measurements of vegetation stressed by drought, our model predicted a 22 percent decrease in deer density.
For mountain lions, the decline was 43 percent.
Petrov examined historical data going back to 1969 and determined that there are ongoing changes in the distribution and migration patterns of the wild reindeer due to climate change and human pressure.
"Taimyr reindeer now have to travel longer distances between their winter and summer grounds, and this is causing a higher calf mortality," Petrov said.

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