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The Official Blog of Our City Forest offers gardening advice, tree care tips, arborist and urban forestry facts from multiple contributors. The Our City Forest Blog also shares stories from our community of volunteers and our AmeriCorps service members' experiences. 

Alviso

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Alviso

Once a town in its own right and a steamship port that served San José when it was the capital of California, Alviso is now a community in San Jose of about 2,000 people.  Alviso is overlooked by residents of the South Bay because of its location -- a pocket nestled against the southern end of San Francisco Bay without a major arterial passing through it.  Another reason it may go unnoticed is that Alviso has avoided the development that is endemic to neighboring cities. That is to say, restaurants, hotels, condos, and tech companies sprout up around Alviso rather than in it.

However, if people took the time to turn off CA-237, and drive towards the Bay on either Gold Street or North First, they would find a historical community that is a pleasant change from the wholesale impatience that increasingly characterizes Silicon Valley.  Alviso is dotted with historical markers that identify its old buildings, such as the Bayside Cannery (‘the third largest cannery in the United States by 1931”), the Union Warehouse and Docks, and the South Bay Yacht Club, which dates back to 1888.  Lifelong resident José Ruiz puts it this way: “Alviso is calm and tranquil, yet lively.” He talks of the immediacy of nature in Alviso; the marshlands by the town are a major stop on the Pacific Flyway that brings large numbers of birds, and residents go to bed at night soothed by winds blowing off the Bay. Days in Alviso can have a festive vibe--José says he often hears banda and cumbia music.

Alviso also is an important ecological junction. The South Bay’s two largest rivers, the Guadalupe River and Coyote Creek, both flow into the Bay at Alviso. The Guadalupe River drains Almaden County Park and the Sierra Azul in the vicinity of Mt. Umunhum; Coyote Creek, which flows through the Don Edwards San Francisco Bay National Wildlife Refuge on the eastern edge of Alviso, drains the foothills of the Diablo Range enroute to the Bay. Residents have endured flooding from both rivers to devastating effect: Alviso ls on a floodplain that is 12 feet below sea level.  Yet, it is the tidal marshland and bay that are more characteristic of the town than its rivers.

Diane R. Conradson, Ph.D. in Exploring our Baylands writes of the marshlands’ open space that borders Silicon Valley, but that it is not fully appreciated by its residents, “The salt marshes are a low and monotonous wasteland to many people. But nowhere else in the Bay Area is one able to see and feel so much space and solitude as in the vast stretches of marshlands.” This is especially true of Alviso, which is on the edge of immense space that is inhabited only by birds and native small animals. José points out that this vastness and the community’s distance from urban development, means less light pollution for Alviso than in neighboring cities and a darker sky with more visible stars. Noise pollution is minimal, too. The one exception is the Union Pacific Railroad whose tracks bisect the community on a levee facing the Bay.

Unfortunately, when land is viewed as a wasteland it is treated as such, particularly when it is a convenient backyard inhabited by no one. The east side of the Peninsula, from the South Bay to the Brisbane lagoon, long has been home to a string of municipal garbage dumps.  Remediation is ongoing.  At the same time Cargill, the privately held agricultural behemoth, created evaporation ponds for the harvest of salt by erecting dikes in the Bay.  For years Cargill's processing plant in Newark has maintained a white mountain of salt that is visible to hikers on Bay trails across the water and commuters on the Dumbarton Bridge.

The nadir of San Francisco Bay in terms of pollution, garbage, and eradication of tidal wetlands for commercial development, happened in the 1960’s.  Since that time, the Bay’s water quality has improved greatly, old-style landfills have closed, and wetlands are being protected.  Most importantly, what once was considered a wasteland is now valued.  A case in point is the public purchase in 2003 of most of Cargill’s property along the Bay. Led by Senator Dianne Feinstein, the deal secured 25 square-miles of wetland habitat for restoration.

Which brings us back to Alviso.  Alviso is one of three areas that is being restored under the South Bay Salt Pond Restoration Project (the other two are Ravenswood in Menlo Park and Eden Landing in Hayward). The largest area is Alviso. To date, 2,600 acres of salt ponds outside of Alviso have been connected to create tidal marshland along with the establishment of 240 acres of shallow pond habitat and 12 nesting islands.  More is to come, including additional flood protection for Mountain View and Alviso. The restoration of marshland itself affords some protection from flooding caused by storms and higher, climate change-induced Bay waters; the marsh acts like a sponge and absorbs water.

Diane Conradson’s comment on people dismissing a place because it isn’t sufficiently showy or entertaining is pertinent to Alviso.  It has history, quiet, stars, wildlife, and an immense landscape adjacent to it.  Even so, José, the lifelong resident of Alviso, says that “Alviso is more than just a nature area or a place to get away from city life. It is a home and peaceful community.”

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Peter Wohlleben’s The Hidden Lives of Trees

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Peter Wohlleben’s The Hidden Lives of Trees

The essential idea in the book is that the forest is a community of trees whose members care for one another rather than compete for water and canopy space.  Wohlleben states his case early on: “A tree is not a forest. On its own, a tree cannot establish a consistent local climate. It is at the mercy of wind and weather. But together, many trees create an ecosystem that moderates extremes of heat and cold, stores a great deal of water, and generates a great deal of humidity. And in this protected environment, trees can live to be very old.”

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23 of Our Trees Were Cut Down: What Now?

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23 of Our Trees Were Cut Down: What Now?

We lost 23 trees last week. They were saplings, planted only months ago. They were yew pines, chinese fringes. Their holes were dug by more than one hundred volunteers and led by AmeriCorps members. They were bought with money provided by San Jose, by Councilman Pierluigi Oliverio. They were grown in our nursery, tended to by our volunteers, by school groups and dedicated AmeriCorps members. These trees took time, effort and cooperation to raise. They took money, community investment and muscle to put into the ground. They took dedication to tend on our weekly watering runs. In a way, these trees were representations of us, as a community. If they had been allowed to continue growing they would have provided shade, flowers and air-cleaning to a hot and busy street. 

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Valley Carpenter Bees: Big, Beautiful Thieves

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Valley Carpenter Bees: Big, Beautiful Thieves

Imagine that you’re a honey bee (Apis spp.) that has left your hive in search of nectar. After a short flight, you have found it: a beautiful sage flower, full of sweet nectar. You zero in on your flower. A deep buzz comes from your right. You see a black object twice your size fly right by and land on the flower you had set your simple-heart-tube on. That object was your distant cousin, a female Valley Carpenter Bee (Xylocopa varipuncta) and your cousin is very important to the pollination of native plants. 

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Why is Everything Named Humboldt?

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Why is Everything Named Humboldt?

What’s the first thing you think of when I say Humboldt? If you’re from California you could be thinking of the countycollegebayfortstate park or wildlife refuge. If you’re from Nevada you might think of the river, the national forestwildlife areasinksaltmarshlake, mountain rangescounty or creepy ghost townDewy-Humboldt in Arizona, Humboldt IllinoisHumboldt KansasHumboldt IowaHumboldt OhioHumboldt WisconsinHumboldt Saskatchewan, it’s hard to escape Humboldt. Humboldt is everywhere. The Humboldt name graces multiple mountains and mountain ranges, forestsnational parkswaterfallsglaciersan ocean current. and a giant sinkhole Animals and plants including, penguins, squid, bat, monkey(s), skunk, snail, an entire genus of flowering plants, legumes, endangered cactus, a beetle, river dolphins, a carnivorous plant, oak, orchid, lily and mushroom all bear his name. Humboldt is in outer space, the Mare Humboldt on the moon and two asteroids bear the name. That doesn’t even touch the organizationsinstitutions, monuments and other random things that are all called Humboldt.

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Coral Root: Parasite in the Redwood Forest

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Coral Root: Parasite in the Redwood Forest

The orchid family, Orchidaceae is enormous, containing 28,000 species. That’s just slightly more species than the population of Monterey, California. The species count does not include the 100,000 or so cultivars that have been bred by humans. California has only 31 native orchids (most of them live in the tropics). I didn’t realize that I had seen my first one.

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The Destroyer of Plants

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The Destroyer of Plants

A field of  tomatoes wilts. A stand of tanoak trees dies. A forest of bay laurels and manzanita withers. An orchard of citrus yellows and decays. A wildland restoration project crumbles into dust. Potatoes turn rancid and spongy. These are the calling cards of Phytophthora, the destroyers of plants

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Growing and Taming the Matijila Poppy

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Growing and Taming the Matijila Poppy

Five feet tall, and half a foot wide, a white flower with bright gold stamens in the center, loomed over the nursery path. Since moving from Michigan four months ago, I had yet to see a plant that really blew me away. 

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Rivers of Trees in the Urban Forest

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Rivers of Trees in the Urban Forest

In their natural state riparian corridors are rich in vegetation and wildlife. A presentation by the the Santa Clara Water District states that “native plants are ecologically best suited to the creek environment.”  Plants and wildlife benefit from the sediment and organic material that streams transport and deposits on their banks. In this way, soil is enriched, erosion offset, and aquifers replenished.  Native plants and aquatic life are adapted to seasonal variances in river flow, including annual flooding.  As F. Thomas Griggs writes, “Cottonwood and willows, as well as all other riparian plant species, are directly dependent on patterns of sediment erosion and deposition.”  

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What is Our City Forest?

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What is Our City Forest?

Our City Forest is a nonprofit organization dedicated to cultivating a green and healthy Silicon Valley by engaging the community in the protection, growth and maintenance of our urban ecosystem, with special focus on our urban forest.

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