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GEOG 1400
Taly Drezner

Physical Geography 1400 Study notes  Coral Reefs stay within the equator  Kelp stay near colder water Species range is limited by a number of environmental factors  Exp. Temperature and salinity  Includes all biotic (living) and abiotic (nonliving) Niche Concept  The specific area where an organism inhabits  The role or function of an organism or species in an ecosystem  The interrelationship of a species with all the biotic and abiotic factors affecting it Potential ranges- (including invasive species)  Environments where a species could live  Zebra mussels in the 5 great lakes an invasive specie  Asian long-horned beetle Actual Range: (where the species actually live)  Areas of natural occurrence  Barriers may restrict spread of habitat areas  Dandelions can live anywhere Endemic:  Restricted to a geographical area Taxon:(Taxa, plural)  Groups of organisms that area related to each other Distjunct distributions:  Animals that are scattered all around the world in different places (cant beside by side)  Fairly recent common ancestors (alligators, Crocodiles)  May have been continuous in the past but discontinuous now. Dispersal:  Movement or spread of seed to new location  Pregnant female or mating pair can start new life Vicarine:  Population split by outside forces  Splitting continents from shifting plate tectonics (extinctions may have caused)  Rising mountains  Climate change  Rising and falling sea levels Evolutionary relicts:  Once widespread and now out competed  Magnolias today (threated to be extinct) Glacial Relicts:  Plants or animals widespread during ice ages now scattered in far north and on mountains Alfred Russel Walace and father of modern of biogeography  Zoologist created the evolution theory with Charles Darwin  Studied animals Bali and Lombok is separated by less than 100km of water Bali has South East Asian mammals Lombok has fewer mammals more of an Australian origin Wallace Line: The hypothetical boundary between the Oriental and Australasian zoogeographical regions, which runs between the Indonesian islands of Bali and Lombok Webers Line:  Australia’s continental shelf Adaptation and convergence  General principles: (genetic diversity)  Variability in all populations  Individuals express genetic traits  Interact with environments
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