Posted on Categories Climate Change & Energy, Habitats, Sonoma Coast, WildlifeTags , ,

California’s early June heat wave cooked coastal mussels in place

Eric Simons, BAY NATURE

Bodega Marine Reserve research coordinator Jackie Sones has worked in or walked on the rocky shores of the North Coast almost every day for the last 15 years. But while she was surveying the reserve for sea stars in mid-June, she saw something new: strips of bleached algae draped across the rocks, like frost, and a swath of dead mussels, hundreds or maybe thousands of them, black shells agape, orange tissue shining in the sun, stretching across 500 feet of rocky tidepools.

“It’s one of the first things you see, coming down the rocks into the middle of the intertidal zone,” she said. “They were very visibly dead.”

In all her time in Bodega Bay, she wrote in her blog The Natural History of Bodega Head, she’d never seen a mussel die-off that size, or affecting so many individual mussels.

She suspected immediately that the algae had bleached and the mussels had overheated earlier in the month. While many Bay Area residents fled toward fans or movie theaters or air-conditioned libraries to escape the record-breaking early June heat wave, the mussels, which attach themselves to rocks with super-strong threads and never look back, would have just roasted in place. The air temperature in Bodega Bay on June 11 hit an unusually warm 75 degrees Fahrenheit. The normal June sea breeze disappeared. A series of mid-day low tides stranded the tidepool animals out of the water for hours while the sun beat down from high overhead.

“In the past we’ve seen patches die, but in this case it was everywhere,” Sones said. “Every part of the mussel bed I touched, there were mussels that had died.”

She went back to the lab and talked to BML marine biologist Eric Sanford, who had seen the same thing in the part of the reserve where he’d been working. The next day Sones walked a longer stretch of shoreline, covering about a quarter-mile, and still saw the same pattern of mussel death. Further reports came in of die-offs around Bodega Bay at Dillon Beach and Pinnacle Gulch, at Sea Ranch, and at Kibesillah Hill north of Fort Bragg.

Northeastern University marine ecologist Brian Helmuth, who studies the effects of air temperature on marine creatures, said that on a 75 degree Fahrenheit day, the tissues inside a marine creature glued to a rock out of the water might rise to 105 degrees. The animals try to vent the heat building up inside of them but can’t without a breeze to carry it away. The mussels’ black shells trap even more heat. “They were just literally cooking out there,” Helmuth said. “Unfortunately this was the worst possible time.”

Read more at https://baynature.org/2019/06/26/californias-early-june-heat-wave-cooked-coastal-mussels-in-place/

Posted on Categories Climate Change & EnergyTags , , ,

Climate change will be deadlier, more destructive and costlier for California than previously believed, state warns

Tony Barboza, Bettina Boxall and Rosanna Xia, THE LOS ANGELES TIMES

Heat waves will grow more severe and persistent, shortening the lives of thousands of Californians. Wildfires will burn more of the state’s forests. The ocean will rise higher and faster, exposing California to billions in damage along the coast.

These are some of the threats California will face from climate change in coming decades, according to a new statewide assessment released Monday by the California Natural Resources Agency.

The projections come as Californians contend with destructive wildfires, brutal heat spells and record ocean temperatures that scientists say have the fingerprints of global warming.

“This year has been kind of a harbinger of potential problems to come,” said Daniel Cayan, a climate researcher at the Scripps Institution of Oceanography and one of the scientists coordinating the report. “The number of extremes that we’ve seen is consistent with what model projections are pointing to, and they’re giving us an example of what we need to prepare for.”

State leaders vowed to act on the research, even as the Trump administration moves to unravel climate change regulations and allow more pollution from cars, trucks and coal-fired power plants.

Read more at http://www.latimes.com/local/california/la-me-california-state-climate-change-assessment-20180827-story.html

Posted on Categories Agriculture/Food System, Climate Change & EnergyTags , , ,

Sonoma County’s Gravenstein apple crop a mixed bag this year

Robert Digitale, THE PRESS DEMOCRAT

Apple farmer Lee Walker also has noticed more falling fruit this year. He and other farmers speculate the numerous hot days this summer may be partly to blame.

“Normally we get maybe one” hot spell per summer that hovers around 100 degrees, he said. However, this year there have been several heat waves.

The Gravenstein apple crop is a mixed bag this season for Sonoma County farmers.
As they gear up for the typically short harvest, some apple farmers said they expect a good crop of the red-and-green streaked fruit, an iconic but fairly delicate local variety and the earliest to be picked in the orchards around Sebastopol.
But others report their gravs suffered from long spring rains during bloom or from prolonged heat this summer.
Joe Dutton, an apple and grape grower outside Graton, said that this season, one block of trees in an orchard shows plenty of fruit, while another nearby block didn’t fare as well.
“The microclimates are for sure showing what they can do,” said Dutton, who farms grapes and apples at Dutton Ranch with his brother, Steve Dutton. Joe Dutton called the farm’s Gravenstein crop “spotty” and advised consumers to get fresh gravs soon because “they will not last long.”
The west county is gearing up for apple season, where for decades the Gravenstein has been a staple in juices and pies.
Apples remain one of the county’s million-dollar crops, though the value lags far behind such areas as livestock, nursery products, eggs, dairy and wine. Last year, the Gravenstein crop amounted to nearly $1.6 million, while the value of late variety apples, such as Jonathans and Golden Delicious, totaled almost $3.9 million.
Read more at: Sonoma County’s Gravenstein apple crop a mixed bag this year | The Press Democrat