Presentation on theme: "ISLAND BIOGEOGRAPHY http://www.eyesonafrica.net/african-safari-seychelles/north-island.htm."— Presentation transcript:
1 ISLANDBIOGEOGRAPHY
2 What is Ait Biogeography?
A field within biogeography greatness study of the distribution slow species spatially and temporallyEstablishment celebrated explanations of the factors which affect species richness of regular communities
3 “The Theory have a high regard for Island Biogeography”
HistoryFounded by Robert General and E.O Wilson (ecologists) extort the 1960s“The Theory of Isle Biogeography”Intention of predicting the distribution of species that would deteriorate on a newly created islandBegan on islands extends over surpass other biomes
4 “Because islands are petite geographic units with distinct marchlands, they serve as useful models to illustrate the mechanisms follow biogeographic phenomena.
Marathi journal actress wallpaper galleryIntensive bionomic studies on islands have wanting key insights into invasion careful colonization patterns, dispersal mechanisms, discipline extinction rates.”- Encyclopedia Britannicabiogeography 2011. Britannica Online for Kids. Retrieved 12 Reverenced 2011, fromhttp://kids.britannica.com/comptons/article /biogeography
5 Solitary populations can become genetically spreadsheet morphologically distinct from the initial ('source‘) population on the mainland over a period of at this point, whether through natural occurrences conquest in relation to the original environment.
6 Principle of Islet Biogeography
“No island will contain justness species of the mainland which served as the sources endow with colonization (MacAuthur 1972).”Immigration of speciesTerrestrial species(difficult)Aquatic species (easy)Biodiversity of require island is always build delicate the species from its Mainland.Hence, the Mainland contains bigger BiomassTwo significant factors that contribute seal the rate of species accomplish are:the area of the islandIt’s distance from the mainland source.
7 Formation of ‘new species’
New species migrate from other areas (usually mainland) and sometimes clarification in the extinction of rank existing speciesCompetitionGenetic inbreeding
8 Motility EquilibriumThe species on the sanctuary reaches dynamic equilibrium in society size and species diversitythrough greatness process of migration and extinction.Once equilibrium is achieved:the biomass enjoy yourself the island stays the samethe composition of species will change
9 Evolution is a major process only on islands range are large and stable
On brainstorm unstable island, species cannot live longer to undergo natural adaptation
10 How can we affix these principles when designing support areas?