Global News Journal
Beyond the World news headlines
from Environment Forum:
Polar bears, sure. But grolar bears?
Most people have seen a polar bear, usually at the local zoo. And most zoo-goers know that wildlife advocates worry about the big white bears' future as their icy Arctic habitat literally melts away as a result of global climate change. But apparently more than the climate is changing above the Arctic Circle.
The new mammal around the North Pole is the grolar bear, a hybrid created when a polar bear and a grizzly bear mate. Then there's the narluga, a hybrid of the narwhal and beluga whale. The presence of these two new creatures and others produced by cross-breeding may be caused when melting sea ice allows them to mingle in ways they couldn't before, according to a comment in the journal Nature.
These hybrids could push some Arctic species to extinction, the three American authors said in their Nature piece. They identified 22 marine mammals at risk of hybridization, including 14 listed or candidates for listing as endangered, threatened or of special concern by one or more nations.
"Some people may say these are just a few freaks. Others will say the sky is falling," lead author Brendan Kelly, of the University of Alaska at Fairbanks, told the Natural Resources Defense Council's OnEarth website.
from Environment Forum:
So long, sardines? Lake Tanganyika hasn’t been this warm in 1,500 years
East Africa's Lake Tanganyika might be getting too hot for sardines.
The little fish have been an economic and nutritional mainstay for some 10 million people in neighboring Burundi, Tanzania, Zambia and the Democratic Republic of Congo -- four of the poorest countries on Earth. They also depend on Lake Tanganyika for drinking water.
But that could change, according to research published in the online version of the journal Nature Geoscience. Using samples of the lakebed that chart a 1,500-year history of the lake's surface water temperature, the scientists found the current temperature -- 78.8 degrees F (26 degrees C) -- is the warmest it's been in a millennium and a half. And that could play havoc with sardines and other fish the local people depend on.
