Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,Historical Ecology of Walrus in the Bering Sea,Erica Hill,University of Alaska Southeast,Historical Ecology,=framework used to study human-ecosystem interactions through time,Assumes that humans modified ancient landscapes and waterscapes,affecting:,biodiversity,abundance,distribution,and size of economically important species,“pristine land-and waterscapes dont exist,How have humans in the Bering Sea region interacted with walrus over the past 3000 years?,Why does this pattern exist?,Humans identified migratory paths of sea mammals and settled at sites where walrus passed,This explains why St.Lawrence Island and the coast of Chukotka were much more intensively occupied than much of the NW coast of Alaska,Research has generated new questions,Did humans overexploit walrus by taking primarily females with calves?,If so,did decline in walrus,emergence of whaling?,Next step in research:,+,