Tag Archives: food web

Lake Michigan has become dramatically clearer in last 20 years — but at a steep cost

Decades ago, Lake Michigan teemed with nutrients and green algae, casting a brownish-green hue that resembled the mouth of an inland river rather than a vast, open-water lake. Back then, the lake’s swampy complexion was less than inviting to swimmers and kayakers, but it supported a robust fishing industry as several commercial companies trawled for perch, and sport fishermen cast their lines for trout. But in the past 20 years, Lake Michigan has undergone a dramatic transformation. >click here to read< 16:38

Disease in herring threatens broader food web

0131_KSLO_HerringTiny herring eggs and larvae are eaten by a multitude of invertebrates, such as crabs and amphipods. They are also important to fish, such as juvenile salmon and smelt, as well as numerous marine and diving birds. As herring grow into juveniles and adults, they enter into the larger food web, including numerous marine mammals, from harbor seals to orcas; vast numbers of birds, from tufted puffins to great blue herons; and a wide variety of fish, from Chinook salmon to halibut. Paul Hershberger, research fisheries biologist with the U.S. Geological Survey, has been studying diseases of herring at his lab on Marrowstone Island near Port Townsend. Read the article here 21:22