3 6.2013 #17: What most likely causes the trends in oxygen concentration shown in the graph below?
7.2013 #37: In the Arctic Ocean, the predominant primary producers are phytoplankton. Phytoplankton are consumed by zooplankton, which in turn are eaten by codfish. In years when there is more open water (less ice coverage), there are more zooplankton and fish than in years with less open water (more ice coverage). Based on the graph below, the difference is most likely because