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  Harley warns B.C.'s beaches and waters will transform if species like mussels and barnacles are replaced by populations that thrive in warmer temperatures. "Mussels and barnacles filter out a lot of the gunk in the water. What would False Creek look like if we lost those filters or replaced them with something that might work a little bit differently? There are questions that we hadn't even thought to ask prior to last summer, because we weren't expecting this sort of thing to happen this quickly," he said. "I expect in another five, 10, 15 years, this is going to be, instead of a mussel-dominated shore, it's going to be more of an oyster-dominated shore. And it might actually look like subtropical parts of of East Asia at that point." Harley and his students aren't the only group looking at how climate change is impacting the waters off B.C. William Cheung, a marine biologist at UBC, analyzed 340 menus from restaurants in the Vancouver area be