The San Francisco Bay and all forms of life that depend upon it are in trouble. So declares a new study from The Bay Institute which finds that upstream water diversions have removed so much water from the Delta and the Bay estuary that artificially created “supercritically dry” years have become the norm — endangering the entire ecosystem as a result. No need to panic or anything.The Chronicle picked up the study, and noted that it shows evidence of “the planet’s Sixth Mass Extinction.” Yeah, so that’s a terrifying term.