ecosystems

While threatened southern sea otters bob and sun in the gentle waves of this central California estuary, wildlife experts up and down the West Coast are struggling to figure out how to restore the crucial coastal predator to an undersea world that's falling apart in their absence.

Climate change could be altering northern ecosystems more quickly and profoundly than anyone surmised, suggests a study that focused on a large Arctic lake.

The federal government appears poised to commit what some believe could be a significant amount of cash in next week's budget to protect more of Canada's lands, inland waters and oceans.

Municipalities and residents in British Columbia are set to argue that the proposed route of the Trans Mountain pipeline expansion would damage sensitive ecosystems, harm public parks and trails and adversely impact homeowners.

The fishermen were dubious when ocean experts suggested they could save their dwindling marine stocks just by switching to new nets.