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29 Cards in this Set
- Front
- Back
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What is the study of the influence of the encironment on fluctuations in population size and composition
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Population ecology
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What is a population
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a group of individuals of the same species that occupy the same area use the same resoutces and have a high probability of interacting and breeding with each other
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What is the number of individuals per unit area or volume
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populations density
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What is dispersion
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the pattern of spacing of the individuals within the population
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What is a common sampling technique in population density
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mark- recaptre method
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WHat do changes in population density reflect
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additions and subtractions of members
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What are the methods in which populations change
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birth immigration and death and emmigration
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What is clumping and what does in indicate
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groups are seperated in small clumps this may indicate a heterogeneous environment
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What is another type of distribution besides clumping
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uniform distribution and random spacing
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What can uniform distribution indicate
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competition or marking of territory
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What does random spacing indicate
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an absence of strong interactions between individuals
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What is the study of vital statistics of a population such as birth and death rates
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demography
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What presents age- specific survival data for a population
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a life table
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What is another word for cohoty
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a group
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What does the survivorship cuve show
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the number or proportion of members of a cohort still alive at each age
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What is a type I survivorship curve
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low mortality at the beginning of life but it rises at old age
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What is a type II survivorship curve
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Death rate is relativly constant thought the life span
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What is a type III survivorship curve
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high death at the early stage of life the survivors are likely to survive on to adulthood
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In a reproductive table what data in normally put in
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female
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What is another name for and what is semelparity
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big-bang reproduction and it is when reproduction is done at one single time
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What is iteroparity
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making repeated reproductive efforts over a span of time
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What is the cost of reproduction
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a loss in survival because of the energy wasted in caring for or having the child
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What is exponential growth
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a hugh growth in population size
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When do you normally see exponential growth
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after a catastrophic event or exploitation of an unfilled environment
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What is the carrying capacity
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the maximum sustainable population size in an environment
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What is K- selection
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density dependant selection population change occurs because of the population
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What is r-selection
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density independant selection population change occurs becuase of other factors
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What is the studies of the variations in population size and the factors that cause them
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population dynamics
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What is a population where immigrants and emigrants have a significant effect on the population
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metapouplation
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