Word: plankton
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Dates: during 2010-2019
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...that it isn't easy - but it's possible nevertheless. A team of scientists led by Stephen Thackeray, an expert on lake ecology at the United Kingdom's Centre for Ecology and Hydrology, has combed through observations of more than 700 species of fish, birds, mammals, insects, amphibians, plankton and a wide variety of plants across the U.K. taken between 1976 and 2005, and found a consistent trend: more than 80% of "biological events" - including flowering of plants, ovulation among mammals and migration of birds - are coming earlier today than they were in the 1970s...
That's what makes them so dangerous to the lakes. Asian carp aren't direct predators, but they eat plankton, which knocks out the bottom layers of the food chain. If they were to successfully establish themselves in the Great Lakes and start breeding, they could utterly disrupt the existing ecosystem, potentially starving out the trout and other native fish that make the Great Lakes a tourism hot spot. (See 10 species nearing extinction...