Forget “Needle in a Haystack.” Try Finding an Invasive Species in a Lake
When the tiny and invasive spiny water flea began appearing in University of Wisconsin–Madison researchers’ nets in 2009, scientists began to wonder how Lake Mendota, one of the most-studied lakes in the world, went from flea-free to infested seemingly overnight. Subsequent studies found the invader had persisted for years at low population densities that went …