[rgbrenner]

Dryden is the same person who made the "90%" loss claim. The key part of that paragraph is this part:

he has appeared to blame the problem on microplastics

Because Dryden owns Dryden Aqua, a water treatment/filtration company. And its interesting that he makes bold claims like these, and places the blame on something he stands to benefit from, assigning lesser blame on what we know is likely the larger impact on plankton loss (global warming).