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APES Unit 2

QuestionAnswer
Species Richness Number of species in a given area
Species Eveness Relative proportion of individuals within the different species in a given area
Provisional Services Goods humans can directly use EX: Trees
Regulating Services Maintain environmental conditions EX:Removal of carbon dioxide by plants
Supporting Services Services that would be costly for humans to generate EX: Pollination
Cultural Services Intrinsic and aesthetic benefits for certain groups of people EX: Natural beauty like canyons
How many mass extinctions have there been Five
Intermediate disturbance hypothesis Having intermediate levels of disturbance will help an ecosystem develop higher diversity due to the build up of resistance and resilience
Genotype Set of traits an organism may potentially posses
Phenotype The actual set of traits expressed in that individual like anatomy or behavior
Mutations A random change in the genetic code produced by a mistake in the copying process
Recombination The genetic process by which one chromosome breaks off and attaches to another chromosome during reproductive cell divison
Artificial Selection When adaptations go on to lead to changes
Natural selection Evolution through natural mechanisms, often termed "Survival of the fittest"
Random Processes Changes that alter genetic composition of a population over time
Gene Flow Individuals moving from one population to another
Genetic drift Simple change in genes over time due to random mating
Bottleneck effect A reduction in the size of a population's genetic variation
Founder effect A few individuals begin a new population with genotypes not representative of a larger group
Allopatric Speciation A geographic separation in a population leading to a new species
Sympatric Speciation Genetic isolation without geographic separation in a population, leading to a new species
Primary Succesion Ecological succession occurring on surfaces that are initially devoid of soil
Secondary Succession The succession of plant life that occurs in areas that have been disturbed but have not lost their soil
Created by: sydeboswell
 

 



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