Impact of Temperature & Sea Level on Climatic Zones & Biogeography, Slides of Geology

Download Impact of Temperature & Sea Level on Climatic Zones & Biogeography and more Slides Geology in PDF only on Docsity! Temperature • From ¹⁶O ¹⁸O ratio (more ¹⁸O  warmer temp) Docsity.com Sea level changes • During glaciations sea level dropped (up to 160 m compared to current sea level!) • During previous interglacials it may have been 70 m higher than now Docsity.com Biogeographic Responses to Glaciation • Changes in location, extent, and configuration of prime habitat • Changes in the nature of climatic and environmental zones • Formation and dissolution of dispersal routes Docsity.com Biogeographic consequences ¢ Migration ¢ Refugia ¢ Pleistocene extinctions (®) Docsity.com Migration ¢ Altitudinal migration of entire biomes Elevation (m) Elevation (m) 5000 -} -------------------- 14,000-20,000 years B.P. 4000 L------------------ Perennial snow 3000 L---------- Superparamo Paramo Subparamo 2000 -------- Andean forest Xerophytic vegetation Subandean forest 1000 ----F777 Lower tropical forest Ce / Savanna and dry / tropical woodland 0 Li Present 5000 --------------------- 4000 }- ----------------- 3000 }--------- 2000 +} ------- 1000 K----7