Ecology and Adaptation
Ecology and Adaptation BIOL 131
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This 2 page Class Notes was uploaded by Mrs. Rollin Kunde on Monday October 19, 2015. The Class Notes belongs to BIOL 131 at Radford University taught by Darrell White in Fall. Since its upload, it has received 13 views. For similar materials see /class/224708/biol-131-radford-university in Biology at Radford University.
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Date Created: 10/19/15
Population Ecology ch 53 Density number ofindividuals per unit area 3 Questions in Ecology How many Where Why Dispersal pattern of spacing Clumped Random Uniform Type 1 Survivorship Curve Flat in beginning low death rate early and middle age Drops steeply as death rate increases among older age groups Few offspring but much parental care Many large mammals Type 2 Survivorship Curve Intermediate between I and III Constant death rate over life of organism Some rodents lizards annual plants Type 3 Survivorship Curve Curve drops sharply in beginning Flattens out for those who survive early dieoff Produce large number of offspring Provide little or no parental care some plants fishes oysters MARCH 2 8i11 Per capita rate ofincrease per capita br per capita dr Per capita rate ofincrease Exponential growth model dN dt rmax N dN dt is expected deaths per unit of time rmax N is maximum per capita rate of increase under idealized conditions Carrying Capacity K Number ofindividuals the environment can support over time March 30111 TEST REVIEW o Liebig s Law of the Minimum I Limiting Factors the factor in shortest supply determines the crop yield I The success of an organism depends on resources in habitat if some resources are in limited supply that determines species success Shelford Law of Tolerance 0 There are zones in which animals have no limiting factors or optimum living success 0 Biotic factors and competition determine where the species live 0 o Osmoregulation maintaining watersalt balance 0 Adaptive feature in marine environments 0 Nasal Salt Glands o Hummingbirds survive cold nights through temper I Lower body temp 104 to 64 I Lower heart rate Life History Patterns Allocation of Energy Growth Reproduction Maintenance Sign Stimulus external stimulus instinctive response to that stimulus depending on organism ex Baby bird automatically opens mouth when mom comes home with food Fixed Action Patterns Circadian Rhytms based off of moon Communication or signal transmission visual chemical tactile auditory Behavior Genetics nature Enviroment nurture Learned Behavior Territorial Optimal Foraging Sexual Selection and choosing a mate starlings use wild carrot to make nest females see nest as successful Males fending off bugs for female giving food to female Sexual Dimorphism Male and Females look different ex Lion peacock
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