Diversity. Galapagos Islands Located about 600 miles west of Ecuador Located about 600 miles west of...
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Transcript of Diversity. Galapagos Islands Located about 600 miles west of Ecuador Located about 600 miles west of...
DiversityDiversity
Galapagos IslandsGalapagos Islands
Galapagos IslandsGalapagos Islands
Located about 600 miles west of Located about 600 miles west of EcuadorEcuador
Consists of 13 volcanic islands and Consists of 13 volcanic islands and numerous islets and rocksnumerous islets and rocks
Discovered by accident in 1535Discovered by accident in 1535 First scientific study done in 1835 by First scientific study done in 1835 by
Charles Darwin while aboard the HMS Charles Darwin while aboard the HMS BeagleBeagle
Galapago’s FinchesGalapago’s Finches
Diversity of Beak FormsDiversity of Beak Forms
Beak form and Beak form and function are function are related to survivialrelated to survivial
Natural SelectionNatural Selection
Organisms with characteristics suited Organisms with characteristics suited to their environment will survive and to their environment will survive and produce the most offspringproduce the most offspring
““Survival of the fittest”Survival of the fittest” Adaptations will be passed to future Adaptations will be passed to future
generationsgenerations
NichesNiches
Role of an organism in an ecosystemRole of an organism in an ecosystem Includes resources utilized, Includes resources utilized,
relationships, and activities the relationships, and activities the organism engagesorganism engages
Each species has its own nicheEach species has its own niche
TerminologyTerminology
Ecosystem – all living organisms in a Ecosystem – all living organisms in a given area and their interactions with given area and their interactions with their environmenttheir environment
Species – a group of organisms that Species – a group of organisms that is able to breed freely and produce is able to breed freely and produce viable offspringviable offspring
Bird’s FeetBird’s Feet
Diversity of Beak FormsDiversity of Beak Forms
Diversity of Beak FormsDiversity of Beak Forms
Diversity of Beak FormsDiversity of Beak Forms
Habitat RequirementsHabitat Requirements
What do you need to survive?What do you need to survive?
Habitat RequirementsHabitat Requirements
FoodFood WaterWater ShelterShelter SpaceSpace
Biotic PotentialBiotic Potential
Limiting FactorsLimiting Factors
Interspecies competitionInterspecies competition Intraspecies competitionIntraspecies competition DiseaseDisease PredationPredation DisastersDisasters Balance other factors such as birth Balance other factors such as birth
rate, early reproductive age.rate, early reproductive age. Effect is to increase death rateEffect is to increase death rate Produces S-curveProduces S-curve
S Shaped CurveS Shaped Curve
Carrying Capacity
Number of individuals an ecosystem can support
indefinitely.
Resources are not used faster than they are replaced!
Human InterferenceHuman Interference
Increase available food sourcesIncrease available food sources Decrease available spaceDecrease available space Elimination of predatorsElimination of predators