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61 Cards in this Set
- Front
- Back
Population equilibrium among organisms and their environments resulting from continuous interaction and interdependency
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Balance of Nature
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Limiting factors that can act from outside the population (abiotic factors)
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Extrinsic Limiting Factors
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Limiting factors that can act from inside the population
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Intrinsic Limiting Factors
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Living, physical factors
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Biotic Limiting Factors
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Without life, physical factors
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Abiotic Limiting Factors
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Limiting factors can have the same effect regardless of how dense the population has become
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Density Independent Limiting Factor
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Limiting factors can act in proportion to how dense the population has become
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Density Dependent Limiting Factor
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Forces that disrupt a natural ecosystem
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Disturbance
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Occurs when two or more organisms use the same resource in a way that affects the birth rate or death rate of the competitors
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Competition
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Competition between members of the same species
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Intraspecific Competition
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The type of competition that exists betweeen members of different species
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Interspecific competition
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the ecological role that a species plays in a biological community; how you fit into things
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Niche
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Determines intensity of competition between individuals or species
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Niche overlap
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the natural environment of an organism
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Habitat
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It shows the full potential of species when there is no competition
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Fundamental Niche
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shows what a species can do in the presence of others
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Realized Niche
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Occurs when one species is a better competitor than another, and forces it into local extinction
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Competitive Exclusion
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To exist together peacefully in the same place or at the same time despite differences
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Coexistence
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Different species that move together
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Mixed Species Foraging Flock
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Different species use a different part of the resource if they live in the same area, habitat, or feed during the same time of day
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Resource Partioning
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Modify your physical shape through natural selection so species can coexist
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Character Displacement
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Exploit resources by using them up so there is nothing left for others
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Scramble Competition
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Engage in a face to face contest over limited resources
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Contest Competition
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Any area that an animal defends against other animals
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Territory
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The behavior of an animal in defining and defending its territory
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Territoriality
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Species that float from territory to territory looking to take an empty one over
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Floaters
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Any organism that eats another organism
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Predator
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The organism that is injured or killed and used for food
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Prey
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An organism that eats another by killing it and eating it
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True Predator
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Insects that lays their eggs in hosts, the young hatch and the host is eaten alive
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Parasitoid
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An animal that eats flesh
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Carnivore
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Prey upon plants
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Herbivore
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An organism that chases and then kills its prey
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Active Pursuit
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Lone predators
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Solo Pursuit
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A group of predators
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Pack Pursuit
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An organism that hides and waits for its prey to come to it
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Ambush Predator
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A bold, distinctive pattern of color characteristics of a poisonous or inedible organism used to warn off potential predators
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Warning Coloration
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Predetors evolve with their prey so to remain dominant
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Coevolution
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Theory suggests that when prey are numerous, the number of predators increaes, reducing the prey population, which in turn causes predator numbers to decline
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Predator/Prey Cycles
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A species that plays a critical role in the ecosystem and even if the species is a small part of the ecosystem, it keeps other species in check by keeping the number of that species at a stable level
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Keystone Predators
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Examines the ways in which behavior is adaptive, how behavior varies, and how it evolves
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Behavioral Ecology
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Bats that mainly eat flowers, fruit, nectar
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Megachiropterans
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Smaller bats that feed on insects, most of which are captured in flight
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Microchiropterans
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Ability of bats to hunt by sounds and to detect and locate objects by emitting high pitched sounds that reflect off objects and return to the ears of the animal
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Echolocation
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A special type of natural selection in which the sexes aquired distinct forms either because the members of one sex choose mates with particular features or because the competition for mates amoung members with those certain traits succeed
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Sexual Selection
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Male's appearance, his ability to thrive, suggest that he has good genes which will be passed on to his children
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Good Genes Model
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If the male can carry around huge tails or antlers and still avoid predators, feed himself, etc, he must be a great choice
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Handicap Model
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Females are simply making an aesthetic choice, like the way you look, posture, grooming, etc
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Aesthetic Preference Model
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Trait becomes reinforced generation after generation until it is greatly exaggerated, can be a dangerous burden
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Runaway Selection
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A pecking order established by fighting one another
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Dominance Hierarchy
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An order for getting mates
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Pecking Order
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Elaborate ritualized behaviors that include songs and dances
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Courtship Display
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The number of songs a male bird can sing and can be correlated to his reproductive success; the stock of skills
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Repertoire
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A curious courtship behavior in which the males offers something to a female to show that he is interested
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Tidbitting
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A courtship arena where birds compete by gathering together and performing for groups of females
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Leks
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A type of bird with many species
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Bowerbirds
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Little structures built to attract a female
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Bowers
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One male mate with several females
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Polygynous
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Males practice making structures because it takes several years before they can build a good enough bower to attract a mate
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Practice Bower
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Certain physical traits attract a mate and these traits become replaced by external objects, such as bower decoractions
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Transfer Effect
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When nature is out of whack, and if disturbances do not occur
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Non-equilibrium Theory
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