The city of Los Angeles is preparing to remove parts of the LA River's concrete lining, but that may not be enough to bring back native fish, reported Zoie Matthew in Los Angeles Magazine.
"It's hard to do piece-by-piece restoration projects for things adapted to river and stream systems. And it's impossible for steelhead," said Sabrina Drill, UC Cooperative Extension natural resources advisor in Los Angeles and Ventura counties.
Steelhead need a continuous, rapidly flowing channel to complete their life cycle. Other...
- Author: Pamela Kan-Rice
Enormous wildfires spark scramble to improve fire models
(Nature) Jeff Tollefson, Aug. 31
…“Something is definitely different, and it raises questions about how much we really know,” says Max Moritz, a fire scientist at the University of California, Santa Barbara.
… The problem, Moritz says, is that most of the fire models in use today are based on data from the past two or three decades. But it seems that fire behaviour might be shifting in response to climate faster than anybody expected, and that makes it increasingly problematic to extrapolate from past trends, he adds.
Even after wildfires have burned homes and taken lives, communities allow for rebuilding in wildland-urban interface areas prone to such disasters, reported Alistair Bland in the East Bay Express.
Van Butsic, a UC Cooperative Extension specialist at UC Berkeley, has studied the alarming trend of building homes in known fire-risk areas.
"We studied 30 of the largest fires since 1970," he said.
On average, 20 years after an inhabited area burns, most of the destroyed homes are rebuilt and many new homes were added — about twice as...
As the human population on planet earth, now about 7.6 billion people, continues to grow, more will settle in areas prone to wildfire, reported Mary Beth Griggs in Popular Science magazine.
The reporter spoke with UC Cooperative Extension natural resources advisor Sabrina Drill about wildfire preparation.
First, make sure that an
Biologists believe a high volume of water flowing through the Los Angeles River this winter due to El Niño rain will favor native fish, reported Louis Sahagun in the Los Angeles Times. Native species - who evolved in river systems prone to sudden torrents of water, mud, bolders and debris in winter and pools and damp patches in summer - main gain an edge when the river rages.
Currently, the fish population in the river is almost entirely non-native. Released as bait by anglers, dumped by the city to eat unwelcome species, and aquarium fish set free by their owners now populate the...