Flashcards
Principles of Biogeography
Cards in this deck (9)
- 1What is biogeography?The relationship between geographic distance/ecogeographic characteristics and biodiversity.
All species differ in ability to adapt to ecogeographic characteristics - 2From which principles interacting in a non-random manner do biogeographic patterns arise?Immigration
Extinction
Evolution - 3What are Brown and Lomolino's Five tenets (1998)?- Climate and taxonomic similarity are correlated
- Present biota strongly influenced by geological and climatic history
- Competition, predation, etc have a determining role in biota distrib, dispersal, and extinction
- If 2 land masses unite, it will result in extinction due to new competition
- To understand biota distrib. w/in a region, we must study biota distrib. outside this region and their close relatives - 4What are Alfred Russell Wallace's world bioregions?- Wallace line (b/w Australian and SE Asian fauna and flora)
- Bali and Lombok (35km apart) - 5What is the Arrhenius relationship, and what does each letter stand for?LogS = c + zlogA
S = no of species
A = area
c and z are constants - 6What main abiotic factors are organisms' distribution determined by?- Sunlight
- Temp (most important)
- Water
All dependent on solar radiation in some way - 7How much solar energy is received by the earth?170,000TW
- 8Name 3 causes of speciation- Abiotic-biotic heterogeneity
- Continuous population move to disjunct populations
- Cosmopolitan species vs restricted species - 9Give 3 problems with hotspots- Indicator taxa: are plants appropriate indicators for areas of species richness and endemism?
- Complementarity: do areas of endemism and richness for diff taxa coincide?
- Sustainability: Can species diversity be maintained in highly threatened habitats?
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- Year 1 BIO171 - Ecology + Plants Flashcards on Principles of Biogeography, created by Sophie Byrne on 18/04/2018.
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- Sophie Byrne
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