mammals of New England
...that the lower species diversity among certain mammals of New England compared to mammals of the American West is thought to be due to fewer glacial refugia in the Eastern United States?
...that the lower <a href="./Species_diversity" id="mw_Q" rel="mw:WikiLink" title="Species diversity">species diversity</a> among certain <b id="mw_g"><a class="mw-redirect" href="./Mammals_of_New_England" id="mw_w" rel="mw:WikiLink" title="Mammals of New England">mammals of New England</a></b> compared to <a href="./Mammal" id="mwAQA" rel="mw:WikiLink" title="Mammal">mammals</a> of the <a class="mw-redirect" href="./American_West" id="mwAQE" rel="mw:WikiLink" title="American West">American West</a> is thought to be due to fewer <a href="./Glacier" id="mwAQI" rel="mw:WikiLink" title="Glacier">glacial</a> <a class="mw-redirect mw-disambig" href="./Refugia" id="mwAQM" rel="mw:WikiLink" title="Refugia">refugia</a> in the <a href="./Eastern_United_States" id="mwAQQ" rel="mw:WikiLink" title="Eastern United States">Eastern United States</a>?