ES 10_7_09 Biodiversity

ES 10_7_09 Biodiversity - middle Chthamalus alone Balanus...

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10/7/09 1 Biodiversity Biodiversity = Speciation - Extinction • Species Diversity • Genetic Diversity • Habitat Diversity Evolution – My concept map
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10/7/09 2 Speciation • What community interactions aid natural selection and differential reproduction in speciation? • Can community interactions create new niches for new species? Community Relationships • Getting Energy – Grazing – Predator/Prey – Scavenging & Decomposing – Parasitism • Symbiosis – Mutualism – Commensalism • Competition
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10/7/09 3 Competitive Exclusion • “Complete competitors cannot coexist.” –Fundamental niche depends on physical (abiotic) conditions –Realized niche depends on biotic as well as abiotic conditions; due to competition
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10/7/09 4 growth rate Location in intertidal zone low high
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Unformatted text preview: middle Chthamalus alone Balanus alone Balanus fundamental niche Chthamalus fundamental niche growth rate Location in intertidal zone low high middle Balanus realized niche Chthamalus realized niche Balanus and Chthamalus together 10/7/09 5 Resource Partitioning Intraspecies and Interspecies Reducing Competition Speciation Why are there many species in some places and not in others? 10/7/09 6 Extinction Fate of all species (99% of all species ever existing are extinct) Background extinction Mass extinction Survival or Extinction 10/7/09 7 Importance of Biodiversity Contemporary Causes Habitat Alteration Introduced Species Changes in Biogeochemical Cycles - interruption of nitrogen, phosphorus carbon ( =climate change ) cycles Hunting and Harvesting...
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This note was uploaded on 12/26/2009 for the course LSP T07.5005.0 taught by Professor Caseyking during the Fall '09 term at NYU.

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ES 10_7_09 Biodiversity - middle Chthamalus alone Balanus...

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