13_ConsGen - Conservation Genetics 55.1, 55.2 and R4...

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55.1, 55.2 and R4Conservation Genetics
2Conservation biology is a young field thatintegrates:EcologyBehavioral ecologyPhysiologyMolecular biologyGeneticsEvolutionConservation Genetics
3Conservation biology has grown rapidly inresponse the biodiversity crisisSome depressing statisticsNearly 50% of land surface has been altered byhumansAbout 75% of marine fisheries are fully exploitedor overexploitedWe have increased atmospheric CO2concentrations by 30%Rate of species loss may be as much as 1000xhigher than at any point in the past 100,000 years
Genetic diversity in a vole populationSpecies diversity in a coastal redwood ecosystemCommunity and ecosystem diversityacross the landscape of an entire regionGenetic diversityGenetic variation withinand between populationsSpecies diversityThe number and relativeabundance of speciesEcosystem diversityThe diversity of habitats,communities andecological processes
5Why preserve biodiversity?1. For its own sake.
6Why preserve biodiversity?2. For our own sake.Rosy periwinklePacific Yew Tree
7Biodiversity particularly importantfor ecosystem servicesPollination, nutrient cycling, purification of air and water,detoxification and decomposition of wastes, moderation ofweather extremesWorth ~$33 trillion a year!
8Four Major Threats to BiodiversityHabitat destructionIntroduced speciesOverexploitationDisruption of “interaction networks”
9Habitat DestructionCalifornia GnatcatcherCoastal sage scrub habitat
10Over 90% of the big fish aregone?(Nature2003)Overexploitation
11Introduced Species
12Disruption of Interaction NetworksExtermination of one species can doom others
13How is genetics used toaid conservation?

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Term
Fall
Professor
11:00-01:50pm
Tags
Physiology, Ecology, molecular biology, Genetics, Biodiversity, Conservation Biology, Evolution, Population Genetics, San Clemente, low genetic variation, San Clemente Island, San Clemente Island Fox

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