It found that a tree’s growth rate increases with its size, in some cases adding the mass of a small tree every year.
That has huge implications for the amount of carbon dioxide an older tree can absorb.
“One of the analogies I use is if you’re managing a sports team, you’ve got to know who your star players are." says forest ecologist Nathan Stephenson with the USGS, and the study’s lead author.
"This would be the equivalent of discovering that your 90-year-old players are the stars of the team," he says.
A study published June 16 by UC Davis and other researchers shows that wild bee diversity is declining. The researchers said steps must be taken to conserve them -- and not just those that are the main pollinators of agricultural crops.
Warmer weather is bringing out snakes, including rattlesnakes, in Northern California.
The company responsible for the crude oil spill off the Santa Barbara coast said Wednesday that cleanup costs are $3 million a day.
Groups sue California, U.S. officials over management of water supply, claiming fish and the Delta estuary are being short-changed.
Relatively few of the cars on the road in California are responsible for most of the pollution. Now the state is trying to do more to get them off the road.