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Environmental group reports high number of fish deaths around the Bay

Original post made on Aug 29, 2022

Environmental group San Francisco Baykeeper reported Sunday a harmful algae bloom is killing fish in massive numbers around the bay.

Read the full story here Web Link posted Monday, August 29, 2022, 12:56 PM

Comments (5)

Posted by Harold Sorenson
a resident of Leland Manor/Garland Drive
on Aug 29, 2022 at 2:11 pm

Harold Sorenson is a registered user.

Turbulent storms churn the ocean in winter, adding nutrients to sunlit waters near the surface. This sparks a feeding frenzy each spring/summer that gives rise to massive blooms of phytoplankton.

Now whether these storms are the result of global warming/climate change is subject to debate as there are countless storms every winter, some harsher than others.

Massive algae blooms can deplete the water of oxygen and the result is dead fish.

Posted by Harold Sorenson
a resident of Leland Manor/Garland Drive
on Aug 29, 2022 at 2:18 pm

Harold Sorenson is a registered user.

Forgot to mention that excess nutrients like nitrogen and phosphorus can also generate algae blooms.

Agricultural and industrial runoffs are often the prime culprits.

Posted by StephenM
a resident of Duveneck/St. Francis
on Aug 30, 2022 at 12:01 am

StephenM is a registered user.

Well actually (speaking as someone who does physical oceanography for a living) the major natural input of nutrients (particularly N) in the coastal ocean comes from upwelling, which is caused by spring/summer winds and the earth's rotation. The major source of nutrients to South Bay and much of the rest of the Bay is sewage treatment plants. From the north, ag sources can also be important. Estimates of the breakdown of the contributions from various sources can be found in Web Link This article, authored by retired USGS scientist Jim Cloern, has some excellent discussion of the dynamics of phytoplankton (algae) in the Bay historically and potentially in the future.

Posted by Jake Garrand
a resident of Mountain View
on Aug 30, 2022 at 7:07 am

Jake Garrand is a registered user.

Kelp is the largest form of oceanic algae.

Posted by Mimi Cassidy
a resident of Midtown
on Aug 30, 2022 at 8:28 am

Mimi Cassidy is a registered user.

Couldn't algae-eating fish be introduced to reduce these swells?

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