A Primer of EcologyWith the aim of teaching students the essential models in population and community ecology, this book explains in detail the basic concepts of exponential and logistic population growth, age-structured demography, metapopulation dynamics, competition, predation and island biogeography. |
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Page 28
... death rates , b and d , remained constant . We did explore some models in which b and d fluc- tuated through time ... rate to decrease because less food and fewer resources are available for organisms to use for reproduction . The simplest ...
... death rates , b and d , remained constant . We did explore some models in which b and d fluc- tuated through time ... rate to decrease because less food and fewer resources are available for organisms to use for reproduction . The simplest ...
Page 31
Nicholas J. Gotelli. Rate do bo K Death rate ( d ) Birth rate ( b ) Population size ( N ) Figure 2.1 Density - dependent birth and death rates in the logistic model . The graph illustrates how the per capita rates of birth and death ...
Nicholas J. Gotelli. Rate do bo K Death rate ( d ) Birth rate ( b ) Population size ( N ) Figure 2.1 Density - dependent birth and death rates in the logistic model . The graph illustrates how the per capita rates of birth and death ...
Page 51
... rate for a population growing according to the logistic model occurs when N = K / 2 , so N = 250 butterflies . Plugging these values into Equation 2.1 gives : dN = r N ( 1 N dt K ... Rate 0.7 0.6 0.5 0.4 0.3 0.2 0.1 Death rate SOLUTIONS 51.
... rate for a population growing according to the logistic model occurs when N = K / 2 , so N = 250 butterflies . Plugging these values into Equation 2.1 gives : dN = r N ( 1 N dt K ... Rate 0.7 0.6 0.5 0.4 0.3 0.2 0.1 Death rate SOLUTIONS 51.
Contents
Logistic Population Growth Expens | 27 |
AgeStructured Population Growth | 55 |
MODEL PRESENTATION AND PREDICTIONS | 90 |
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abundance age class age structure Allee effect allenbyi assumptions axis birth and death birth rate calculate carrying capacity Chapter coexistence colonization competition competitors constant death rate decrease density-dependent depends E. O. Wilson ecology Euler equation example exponential growth Expression extinction rate Figure fluctuations functional response habitat immigration rate interspecific competition isocline of species iteroparous K-selection K₁ K₂ large islands Leslie matrix logarithmic logistic growth logistic model Lotka-Volterra equations Lotka-Volterra model MacArthur-Wilson model mathematical maximum metapopulation metapopulation models N₁ N₂ number of individuals Number of predators number of species Number of victims offspring parasite passive sampling model patches persist population cycles population growth rate population sizes predator and victim predator isocline predator population primer rate of increase red grouse represents reproductive value rescue effect schedule source pool species richness species-area relationship survivorship survivorship curve tion turnover ulation victim density victim isocline victim population zero