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The Tropical Savanna EcosystemLEE M TALBOT and Richard h kesel
Marshesthe Wet Grasslandsw G smith and JUDITH A monte
Vanishings and Future of the PrairiePAUL s martin
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Africa Alaska alpine tundras animals annual Arctic Arctic Tundra areas average beach ridges Bison Bliss buffalo burning Carex caribou climate coast coastal Costin Curatella Curatella americana cushion plants Devon Island dominated dry season Dryas Dryas integrifolia ecological ecosystem environment Eriophorum extinct fauna Festuca fire flora forage forest GEOSCIENCE Geum rossii glacial grass grazing habitat heath herbfields herbivores herbs herds High Arctic hunters important Indian Jour lands large herbivores lemming lichens major mammals mangrove marshes Mexico mosses mountain musk ox native nitrogen North America northern numbers occur peat percent plains plant cover Pleistocene Polar Desert pollen population prairie production protein rainfall range Rupununi Salix arctica sedge meadows shrubs slopes snow soils southern Spartina species summer swamps tall Tedrow temperature Texas tidal tion Toxodon trees tropical savanna Truelove Lowland tussock grasslands ungulates Univ upland Valley vascular plants vegetation wetlands winter woodland woody zone