Population Ecology - Population Ecology(HL Objectives...

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Population Ecology Population Ecology (HL) (HL)
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Objectives Objectives Review – population characteristics and growth. G.5.1 – Distinguish between r-strategies and K-strategies. G.5.2 – Discuss the environmental conditions that favor either r- strategies or K-strategies .
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Objectives Objectives Review – Population sampling G.5.3 – Describe one technique used to estimate the population size of an animal species based on a capture-mark-release-recapture method. G.5.4 – Describe the methods used to estimate the size of commercial fish stocks. G.5.5 – Outline the concept of maximum sustainable yield in the conservation of fish stocks. G.5.6 – Discuss the international measures that would promote the conservation of fish.
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Review: Review: Population Population Characteristics Characteristics A population is a group of individuals of a single species that simultaneously occupy the same general area. Characteristics of populations are shaped by the interactions between individuals and their environment. Populations have size and geographic boundaries. Density is the number of individuals per unit area. Dispersion is the pattern of spacing among individuals within geographic boundaries. Darker color = greater density
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Review: Review: Population Population Characteristics Characteristics The exponential model of population growth describes an idealized population in an unlimited environment. Exponential growth increases faster and faster unchecked, like compound interest. Change in population size (N) = Births during - Deaths during during time interval (t) time interval time interval or in mathematical notation: ΔN ∕ Δt = B - D (where Δ [ delta] means change in” ) If B = D then there is zero population growth.
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Review: Review: Population Population Characteristics Characteristics The logistic model of population growth shows a leveling-off due to carrying capacity (K) : the maximum population size that can be supported by available resources.
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