| bald eagles and sea otters in the aleutian archipelago: indirect effects of trophic cascades. | because sea otters (enhydra lutris) exert a wide array of direct and indirect effects on coastal marine ecosystems throughout their geographic range, we investigated the potential influence of sea otters on the ecology of bald eagles (haliaeetus leucocephalus) in the aleutian islands, alaska, usa. we studied the diets, productivity, and density of breeding bald eagles on four islands during 1993-1994 and 2000-2002, when sea otters were abundant and scarce, respectively. bald eagles depend on nea ... | 2008 | 18959310 |