Of course other explanations may exist since NO proof has been offered for CO2 acidification.
Dissident Voice : The Weeds of Willapa Bay
"....
The WSDA believes it is in Cohen’s interest to rid the bay of the weed, as the $16 million oyster industry relies on ample, healthy habitat for productive harvests.
In the first round of spraying the WSDA used Rodeo, a glyphosate based herbicide manufactured by Monsanto. The Sierra Club of Canada states of Monsanto’s plant poison, “[G]lyphosate has been linked to respiratory problems, birth defects, miscarriage, and cancer, and has also been shown to be toxic to fish and persistent in the soil.”
Now the marshes around Willapa Bay are being sprayed with imazapyr, a purportedly less poisonous substance than glyphosate. Nonetheless the EPA still believes imazapyr may be slightly toxic to fish and aquatic vertebrae."
And check out this oysterman's comments on the article cited above:
I am the oysterman for the moby dick and have tide flats of my own.
I would like to point out that we grow our oysters in the spartina with great results and we rely on the natuaral catch for our oysters.
The chems that they are using in the bay are toxic to all natural spat ,salmon and ducks .We have the info on this and we also have spent thousands on our own lab tests with the results that come back we in goodfaith can not sell our oysters. Yet all other companies in the bay do sell theres and there oysters are worse because ours are caontaminated from drift and all the other companies spray there land directly.recently taylor shell fish was dropped as a heritage food supplier because of there pesticide practices and there will be more the lies that led to the posioning of our bay will be answered for
Note also that all of this was written ove TWO years ago after 4-5 yyears of pesticide treatments to the Spartina on the bay.
Now...all of a sudden it is global warming to blame...when none has been measured and ocean temperatures have actually declined a little bit.