Archive for the ‘research’ Category

SAN FRANCISCO IMAGES: AFTER 1860

November 13, 2017

The city in 1864:SF AERIAL--1864Lake Merced, 1868:lake-merced-1868

Plowing the dunes in preparing to create Golden Gate Park, 1870s:GGP-plowing-dunes

1875 map:sf 1875

The city in 1877, looking south over Telegraph Hill:sf--1877

Golden Gate Park as trees take root, 1880, along Ocean Beach:GGP-1880San Francisco, 1890:SF--1890

Golden Gate Park, 1892, for Mid-winter Exposition:GG PARK 18921897 map:sf 1897San Francisco before earthquake:OLD WATERFRONTCutting through sand hill to make Second Street near Rincon Point, before 1900.Second-Street-Cut-1869-A12.28.752nLiving with sand after earthquake:sand hillsTheodore Wores’ painting of dunes looking across to Lake Merced in early 1900s, lupine in bloom where houses now stand:1914San-Francisco-Sand-Dunes-and-Lake-merced

1914, as automobiles begin to dominate the city:sf aeriaL--1914Lake Merced Boulevard construction:LakeMercedBlvdConstruction

Fort Funston, preparing for war. Below that is Lake Merced at top of image with the peninsula leading to today’s golf course visible:Ft_Funston_Cantonment_Areafunston2

Sunset District just after WW2:Sunset_dunes_1947Richmond District today, note the small pockets of private open space between houses:richmond aerialrichmond aerial2Lake Merced today:merced todaySan-Francisco-Natural-Heritage-Map

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SAN FRANCISCO’S NATURAL HISTORY: SOME RELATED LINKS

September 10, 2017

Thousands of scientists from around the globe are warning us to pay attention and change our ways.  This isn’t about some promise of heaven in the by-and-by.  This is a warning about hell here on earth, man-made.   Now that the U.S. is the only nation on earth not pledged to deal with climate change, there is some faint glimmer of hope.  But in the 25 years since the first such communal warning from science most trends have been negative.  Too many people, habitat destruction is rampant, fresh water depleted.  The nations of the earth did deal with ozone depletion, but that was a problem that didn’t threaten oil companies, coal mining, global shipping, airplane travel, fracking or use of pesticides by industrial agriculture.  In a word, it was fairly simple: don’t use that chemical, use this one.  We can’t even keep from poisoning one another with sugared drinks and opioids, how are we seriously going to stop population growth, chemical-based food production and depletion of forest and ocean?

Extinction does not make exceptions.

Human-caused toxic algae blooms. One culprit: fertilizers.

2017 National Climate Assessment from U.S. agencies.

Sea level rise, temperature rise and sunken cities of the future.

The great British environmental reporter on “INSECTAGEDDON.”

Bedbugs even make airplane rides.  Aren’t you itching to read about that?

Climate change: the modern world as a massive killing field.

Limpets, climate change and health of marine ecosystems.

Will the 1017-8 Dungeness Crab season be a safe one?

Warmer soil loses carbon to the atmosphere as global warming produces this negative feedback loop of more carbon into the air.

Neonicotinoids are contaminating bees and their honey around the world.  Bee-saster in the the making.

Click here for information on the herpes epidemic attacking commercial oyster beds using Asian oyster species.  The herpes microbes have been found in some oysters in California, not the native oysters.

Click here for info on Monsanto’s latest powerful poison and one state’s fight to prevent its use.

How bad can global warming extinctions become? https://www.theguardian.com/environment/2017/sep/09/this-is-how-your-world-could-end-climate-change-global-warming