Alameda Point Environmental Report
News About Cleanup, Sustainability, Parks, Open Space, and Wildlife at Alameda Point, Alameda, CA
Photos of a Great Egret foraging for Yellowfin Gobies in the shallow mudflat next to Breakwater Beach at the southeast corner of Alameda Point. After catching a Goby, the Egret would then have to fling the little fish into the air to maneuver the fish back to its mouth. Photos are from Friday, February 9, 2018.
A legacy of disappointment continues on the aircraft runway area at Alameda Point. In the nearly 20 years since the Navy ended operations there, the community has lost 74 acres of open space that was once slated to become city property. The community has also lost the possibility for a 550-acre national wildlife refuge and a state-of-the-art community hospital to be run jointly with Alameda Healthcare District to serve veterans and non-veterans.
There is still no groundbreaking scheduled for the veterans’ clinic and columbarium.
The only recent expenditures on the 624 acres of federal property, now owned by the Department of Veterans Affairs (VA), have been to fund landscaping over an underground dump and the management of the endangered least terns that nest on 10 acres, which includes the widespread application of herbicides and vegetation removal on 300 acres of pavement at the direction of the U.S. Fish and Wildlife Service.
Mitigating the loss of wetlands appears to be the only planning underway. Continue reading “VA project adds to legacy of letdowns on airfield”
The rain ended, the sun came out, and so did the harbor seals at Alameda Point. So many of them came out of the water to warm up on their new float on January 5, hardly any of the structure was visible. The number has many observers asking for a second float.
The regional ferry agency installed the new float after removing an old Navy dock used by the seals, in order to make way for a ferry maintenance facility.
“I nearly keeled over when I saw the platform,” said Lisa Haderlie Baker, harbor seal monitor and Alameda resident. “So many seals packed cheek by jowl, literally, that I had to count them four times using binoculars to make sure there were 60 of them, at least, basking in the sun, which I knew had to be close to a record. It was a tremendous thrill.” Continue reading “No vacancy on float for harbor seals”
Location, location, location! But for a fenced-off dilapidated navigation light stand on a jetty at the Seaplane Lagoon, ospreys would not have had a successful nesting season this year.
In late August two adult ospreys took flight from their Seaplane Lagoon perch for parts unknown with two healthy offspring. It was a welcome sight because for the past three years a series of frustrating avian soap operas featuring other ospreys and unwanted nesting attempts aboard the maritime ship Admiral Callaghan were marked with failure. Previously in 2012 they had raised one chick, the only other recorded case of osprey reproduction at Alameda Point.
Continue reading “Ospreys nest successfully in 2016 at Alameda Point”
Three thousand tons of sand was added to the nesting grounds for the least terns at Alameda Point in late February and early March. In the weeks that followed, volunteers from St. George Spirits and the Boy Scouts and Cub Scouts came out to help make the site ready for the arrival of the terns in mid-April.
The Water Emergency Transportation Authority (WETA) paid for enough sand to cover half of the 9.6-acre nesting area with three inches of sand, as well as for grading. The weeklong delivery of sand was a conservation mitigation requirement for the impact that WETA’s new ferry maintenance facility will have on the terns’ feeding area. As many as 12 ferries will make up to four passes per weekday through the Alameda Point Channel where the terns frequently dive for small fish.
Wind and water erosion take their toll on the sand substrate lying atop old airfield taxiway pavement, requiring periodic replenishment. This latest delivery of Angel Island coarse sand has built up the sand depth on much of the site to the point that it’s starting to feel like a real beach underfoot. Beaches are the traditional nesting habitat for terns.
In March, virtually all of the employees of nearby St. George Spirits showed up on a rainy Sunday morning to help distribute cinder block grid markers and clay tile chick shelters throughout the site. The high-spirited and determined crew trudged through puddles of water determined to get the job done regardless of how wet they got. Some of the volunteers worked in the old Quonset hut repainting and numbering the plaster markers that the Fish and Wildlife Service uses to identify each nest. Others re-stenciled cinder blocks.
The cinder blocks and the plaster markers allow for systematic data collection on nesting success. The blocks and markers were removed prior to the sand delivery and grading work.
In April, Alameda Boy Scouts of Troop 73 joined the Cub Scouts from Pack 1015 for the final preparations for the least tern arrival. “Overall, 25 youth from 4th grade to 12th grade and 15 parents joined this final chilly work day putting out oyster shells, flattening the area after a week of rain and pulling the last of the weeds,” said Dorinda von Stroheim, Webelos Den Leader Pack 1015. “The kids loved placing the shells and took extra care to make sure all the shells were evenly distributed.” The scouts were supposed to get pizza delivered at noon, but they hustled through their assignments so quickly that the pizza parlor was not even open yet. They accepted a rain check from the Audubon Society.
The least terns, an endangered species, have enjoyed phenomenal success on the old airfield at Alameda Point. Pushed to the brink of extinction by human encroachment on their traditional Southern California coastal nesting areas, the terns began taking up residence on a number of military bases in California during the past four decades. With early and continued stewardship by the Navy through 2014, and the addition of volunteers after the base closed, the Alameda Point colony went from a few nests to over 300 today.
During the 2015 nesting season, the Alameda Point terns were the top performers statewide, both in terms of the total number of fledglings produced, and the key data point — ratio of fledglings per nest — according to recently released data.
The public is invited to see the terns during the annual “Return of the Terns” event on June 18. Tours by bus leave from the Crab Cove Visitor Center after an educational presentation. Reservations are required for one of the three tours via the visitor center, or the East Bay Regional Park District’s website https://apm.activecommunities.com/ebparks using the search keyword “terns.”
Originally published in the Alameda Sun.
About 100 California Brown Pelicans made an unusual appearance on the old wooden dock on the south side of Alameda Point near the U.S.S. Hornet on December 23. The visit provided a rare close-up view of this colorful and iconic bird, but also a reminder of their struggle to survive as a species. Only one of the pelicans could be identified as a one- or two-year-old.
During the past four years, the breeding rate for California Brown Pelicans has been dismal. This recent trend has been directly attributable to the dwindling supply of sardines along the California coast, according to a Brown Pelican status report issued in October by the Washington State Department of Fish and Wildlife. The sardine population has dropped so low that in April of 2015, the agency responsible for managing Pacific Coast fisheries banned commercial fishing of sardines until the end of June 2016.
In May, the U.S. Fish and Wildlife Service urged the same agency to consider additional management measures to stave off a decline in northern anchovy, another important food source for pelicans and other marine life.
Brown Pelicans were removed from the federal endangered species list in 2009 with great fanfare after recovering from the devastating effects of the agricultural pesticide DDT on their eggs. But they no sooner recovered from chemical contamination than they fell victim to a plunge in food supply.
“Although most essential nesting and roosting habitat throughout the subspecies’ range is protected, the California Brown Pelican has experienced unusual mortality events and a multi-year decline in breeding success since delisting, both of which appear to be due to the lack of adequate forage,” wrote the U.S. Fish and Wildlife Service to the Pacific Fishery Management Council on May 14, 2015.
About 10 percent of California Brown Pelicans nest on two islands in Channel Islands National Park off the coast of Southern California. The remainder nest and rear their young off the western coast of Mexico.
The University of California at Davis and the Mexican national conservation agency conducted a study of the 2014 nesting season off the coast of Mexico. The U.C. Davis news summary of the study results stated, “The scientists found that this year, areas that typically host hundreds or thousands of nesting pairs held only a few hundred at most, and in some cases zero nesting pairs.” Co-author of the study, U.C. Davis wildlife biologist Dan Anderson, is quoted in the story saying, “That’s what we call a failure, a bust. The bottom dropped out.” Anderson has been monitoring Brown Pelicans for 46 years.
Breeding normally begins in January. Whether the pelicans currently at Alameda Point will make the journey south is yet to be seen.
Breakwater Island along the south side of the Alameda Point Channel serves as the most popular resting site for Brown Pelicans on San Francisco Bay during the warmer months.
Immature Brown Pelicans are distinguishable by being entirely brown, except for their whitish underbelly. By their third year, the neck becomes white and the head yellow. During breeding season, the neck of adults becomes dark chestnut and the pouch under their bill becomes red.
Reprinted on Golden Gate Birder, Golden Gate Audubon Society’s blog.
Featured on Bay Nature’s Nature News.
Further reading:
“Periodic Status Review for the Brown Pelican,” October 2015, State of Washington Department of Fish and Wildlife.
“Failure to launch: California brown pelicans’ breeding rate dismal,” June 2, 2014, UC Davis News and Information.
“Letter from U.S. Fish and Wildlife Service to Pacific Fishery Management Council,” May 14, 2015.
Additional photos and video from December 23, 2015, Alameda Point:
A photo gallery of birds sighted at Alameda Point during the Fall of 2014. They include: Black-necked Stilt, Red-shouldered Hawk, Northern Flicker, White-crowned Sparrow, Cedar Waxwing, Chestnut-backed Chickadee, Northern Shoveler, Black-crowned Night Heron, and Western Bluebird.
Continue reading “Bird sightings at Alameda Point – Fall 2014”
