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Drought And Beetle Infestation Killing California Forests

  •  Amy Quinton 
Monday, August 31, 2015 | Sacramento, CA
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Amy Quinton / Capital Public Radio

Trees dying from drought and beetle infestation in Mariposa County.

Amy Quinton / Capital Public Radio

Aerial surveys around the state show more than 20 million dead trees so far this year. The drought has a partner in crime – the pine beetle. If this deadly combination continues it could drastically change California’s forested landscape.  

To understand the impact of the drought in the Sierra Nevada forests, one need only visit Al Anderson’s 800-acre ranch in Mariposa County.

 0828AQ_DEADWOODp2
Robert Giorgi saws limbs off dead trees in Mariposa County. Amy Quinton / Capital Public Radio

Loggers are busy cutting down dead trees on his property. Anderson says over the last two years, he’s watched his trees die.

“We took out more than 40 loads in April and May and we thought we pretty much had it," says Anderson. "Then, the day after the loggers left, we noticed more trees were dying.”

 0828AQ_DEADWOOD7
Al Anderson holds cup full of the western pine beetle caught in a pheromone trap on his property in Jerseydale, CA.   Amy Quinton / Capital Public Radio.

Trees are falling victim to three things right now; drought, the pine beetle, and wildfires. 

Each of these stressors on its own is bad enough but together they feed on each other.  That’s accelerating the pace of the die-off. 

Robert Giorgi has been helping Anderson cut down the trees. He holds up a stump he cut just a few hours earlier.

“The very center of the trees are just dry, almost hollow sounding to hit, no water, they can’t fight them off,” says Giorgi.

0828AQ_DEADWOODp3

Robert Giorgi holds up stump of tree diseased from the western pine beetle. Amy Quinton / Capital Public Radio.

It doesn’t help that Anderson’s property is next to the Sierra National Forest. Dead trees from a wildfire two years ago are attracting the bugs and they’re spreading onto Anderson’s property. 

Anderson stands on a ridge overlooking a valley with huge swaths of dead brown trees.

“This entire ridge up here, the part that wasn’t burnt, the bugs got the rest of it,” says Anderson.

 0828AQ_DEADWOODp4
Al Anderson stands on the top of Buckingham Ridge in Mariposa County. Amy Quinton / Capital Pubic Radio

Aerial surveys by the Forest Service show more than 18 million dead trees in the Sierra forests. But there are millions more around the state. 

“Mortality in our state’s forests is as bad as we’ve seen in any recent history, going back decades at least, if not recorded history.” says Matt Dias, acting executive officer with the California Board of Forestry and Fire Protection.

Aerial Detection Survey April 15-17 Figure 3

 

Dias says the board recently took the unprecedented step of relaxing rules that limit the amount of trees a landowner can remove – because all the dead trees increase the wildfire risk.  

 0828AQ_DEADWOODp8Dead Ponderosa pine trees on Al Anderson's property. Amy Quinton / Capital Public Radio.

 

What to do with all the dead trees is another problem. Al Anderson says saw mills are backlogged.

“There’s so much supply that it’s outstripping demand," says Anderson. "The mills are full of logs because of all the fires and bug kill, and some mills won’t take any more trees at all period.”

For now, the dead trees sit in his yard wrapped in plastic until he can get a saw mill to take them.

 0828AQ_DEADWOODp5Al Anderson stands in front of his dead trees. They're wrapped in plastic to prevent the beetle from spreading. Amy Quinton / Capital Public Radio.

The dead trees aren’t just a burden for landowners.

About four hours north of Anderson’s property, PG&E crews are cutting down four dead Ponderosa pine trees that threaten to take down power lines.  

“Three months ago we were out here and these trees were not dead and now they are," says Jeff Mussel, vegetation program manager for PG&E.  "So the amount of time that’s it’s taken for the trees to go from a healthy green appearance to ultimately dead is extremely rapid,” he says.

0828AQ_DEADWOODp6

PG&E crews cut down Ponderosa pine trees that threaten power lines. Amy Quinton / Capital Public Radio

 

Mussell says watching the hillsides turn brown is devastating to witness. 

Aerial Detection Survey South Sierra Foothills July 6 - 10 Figure 3

 

Bridget Fithian with the Sierra Foothill Conservancy agrees. She says if this continues there will be no conifers left.

“It’s really, it’s like a freight train basically moving through the whole Sierra and in our lifetime we’re probably going to see a dramatic conversion of this landscape.”

Aerial Detection Survey South Sierra Foothills July 6 - 10 Figure 5

Fithian says the Sierra could be transformed into a landscape that mirrors Southern California. All Al Anderson can do is watch.

“Emotionally it’s pretty difficult. This was my pride and joy. And to sit here and watch it get destroyed by a little bug is hard to take,” says Anderson.

Sierra Nevada tree mortality from Steve Dunsky on Vimeo.

Aerial Survey Of Tree Mortality July 10. Video by Steve Dunsky, U.S. Forest Service. Location: Bass Lake on the Stanislaus National Forest.


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 droughtsierra nevadatreesCalifornia droughtdead treesforestssierra foothills conservancy

Amy Quinton

Former Environment Reporter

Amy came to Sacramento from New Hampshire Public Radio (NHPR) where she was Environment Reporter. Amy has also reported for NPR member stations WFAE in Charlotte, WAMU in Washington D.C. and American Public Media's "Marketplace."  Read Full Bio 

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