The benthic zone is critical habitat for most aquatic species, especially fish ... producing oxygen as a byproduct. Unlike land ecosystems the lake system is contained, almost like a closed Tupperware ...

"It is the first time that zebrafish have survived for 43 days in such a closed aquatic ecosystem," said Sun, adding that the completely enclosed aquarium enabled unobstructed observation aboard ...

To make matters worse, new applications for water access have been closed since 2006 ... overcome when trying to retain river water for aquatic ecosystems—a goal often referred to as ...