2023 SF Bay Harmful Aglae Bloom
It is with great sadness that I'm asking your to join this project
https://www.inaturalist.org/projects/sf-bay-harmful-algae-bloom-2023
in preparation for another potentially high mortality event in the SF Bay caused by a Heterosigma bloom.
CDFW's Dr. Karen Odkins is the manager of the project and is asking that when you join you do so letting project admin see coordinates for sensitive organisms that are usually obscured as it will make tracking sturgeon mortality more streamlined. Also please mark your organisms as "dead" as this is one of the factors being used to pull observations into the project.
The Heterosigma tide is already hitting Berkeley's shoreline and there are dead fish already in the project from Emeryville.
https://oaklandside.org/2023/08/01/algae-bloom-that-caused-lake-merritt-fish-kill-is-spotted-along-east-bay-shoreline/
@merav
@damontighe
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תגובות
Thank you for setting up this valuable project. I think it is important to note that we do not know what caused the deaths of organisms found in the area of this project and that there are many possible causes. Specific HAB bloom reports must be considered tentative until verified by qualified scientific observers. I look forward to that happening and applaud iNaturalist, Damon and Dr. Odkins for making it easy for community observers to record and collect their observations.
Thank you for letting us know! I wasn't planning to revisit the site, but I won't turn down an excuse to go.
Thanks for setting this up and letting us know. I’ll be down in the Bay Area in several days and will go visit the shorelines and Lake. Hopefully this is nothing like last year.
@burtosa @graysquirrel @danielleward212 @leslie_flint
I appreciate the notice. I will certainly try to contribute as soon as I am able.
thanks so much for organizing! i'll be mainly active in the East Bay area between Albany and Emeryville
Thank you Damon!
@max_benningfield
Thanks for this update! I’ll keep a lookout when I’m on my walks around the marinas. I hope that it won’t be as bad as the last bloom!
Thank you to many of you that have contributed surveying the shorelines. Based upon microscopy from many sites around the east bay I think the bloom may not be growing as rapidly as last year. I know that CDFW has already found this observations useful, so thank you for all of your efforts and hopefully we don't see this bloom get to the size of 2022 which peaked ~ 8/22-26
Thanks for tagging me, @damontighe. Should I try surveying some south bay points? or is it mostly around the northern part of the bay for now?
@merav - it looks like the bloom has past at this point, so no more surveying is needed at this time. The SFEI satellite imaging tool for Chlorophyll has tracked really well: when i see large red zones it seems that when we see dead fish. The last bloom emerged over a 4 day period, culminating around July 30th and with dead fish showing up 2-3 days later.
https://fhab.sfei.org/?p=chlorophyll&c=max1day&d=20230809#
Thanks, @damontighe. I'm glad to hear it's gone for now. I'll join the surveys on the next one...
I just posted two very healthy bat rays at the entrance to the channel at 8th St.bridge , so positive signs of recovery.
Awesome!
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