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- https://bio.libretexts.org/Courses/Gettysburg_College/02%3A_Principles_of_Ecology_-_Gettysburg_College_ES_211/06%3A_Population_Ecology/6.04%3A_Population_Dynamics_and_RegulationThe logistic model of population growth, while valid in many natural populations and a useful model, is a simplification of real-world population dynamics. Implicit in the model is that the carrying c...The logistic model of population growth, while valid in many natural populations and a useful model, is a simplification of real-world population dynamics. Implicit in the model is that the carrying capacity of the environment does not change, which is not the case. The carrying capacity varies annually: for example, some summers are hot and dry whereas others are cold and wet. In many areas, the carrying capacity during the winter is much lower than it is during the summer.
- https://bio.libretexts.org/Bookshelves/Botany/Botany_(Ha_Morrow_and_Algiers)/05%3A_Ecology_and_Conservation/5.01%3A_Population_Ecology/5.1.04%3A_Population_Dynamics_and_RegulationPopulations are regulated by a variety of density-dependent and density-independent factors. Species are divided into two categories based on a variety of features of their life history patterns: r-se...Populations are regulated by a variety of density-dependent and density-independent factors. Species are divided into two categories based on a variety of features of their life history patterns: r-selected species, which have large numbers of offspring, and K-selected species, which have few offspring.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/15%3A_Competition/15.03%3A_Interspecific_(Two_Species)_Competitionwhere Nj is the density of species j, R is the density of the resource, a is the rate at which species j eats the resource, d is species j's death rate, and r is the rate at which resources grow ...where Nj is the density of species j, R is the density of the resource, a is the rate at which species j eats the resource, d is species j's death rate, and r is the rate at which resources grow when not consumed.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_15%3A_Competition/15.3%3A_Interspecific_(Two_Species)_Competitionwhere N j is the density of species j, R is the density of the resource, a is the rate at which species j eats the resource, d is species j's death rate, and r is the rate at which resources grow when...where N j is the density of species j, R is the density of the resource, a is the rate at which species j eats the resource, d is species j's death rate, and r is the rate at which resources grow when not consumed.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_14%3A_Introduction_to_Community_EcologyFigure 9: Foundational species increase food web complexity by facilitating species higher in the food chain. (A) Seven ecosystems with foundation species were sampled: coastal (seagrass, blue mussel,...Figure 9: Foundational species increase food web complexity by facilitating species higher in the food chain. (A) Seven ecosystems with foundation species were sampled: coastal (seagrass, blue mussel, cordgrass), freshwater (watermilfoil, water-starwort) and terrestrial (Spanish moss, marram grass). (B) Food webs were constructed for both bare and foundation species-dominated replicate areas. (C) From each foundation species structured-food web, nodes (species) were randomly removed until the s…
- https://bio.libretexts.org/Workbench/BIOL-11B_Clovis_Community_College/19%3A_Population_and_Community_Ecology/19.04%3A_Population_Dynamics_and_RegulationThese are grouped into density-dependent factors, in which the density of the population at a given time affects growth rate and mortality, and density-independent factors, which influence mortality i...These are grouped into density-dependent factors, in which the density of the population at a given time affects growth rate and mortality, and density-independent factors, which influence mortality in a population regardless of population density. The three photos include: (a) 1916 mural of a mammoth herd from the American Museum of Natural History, (b) the only stuffed mammoth in the world, from the Museum of Zoology located in St.
- https://bio.libretexts.org/Courses/University_of_Pittsburgh/Environmental_Science_(Whittinghill)/14%3A_Population_Ecology/14.02%3A_Population_Growth_and_RegulationThe logistic model of population growth, while valid in many natural populations and a useful model, is a simplification of real-world population dynamics. Implicit in the model is that the carrying c...The logistic model of population growth, while valid in many natural populations and a useful model, is a simplification of real-world population dynamics. Implicit in the model is that the carrying capacity of the environment does not change, which is not the case. The carrying capacity varies annually: for example, some summers are hot and dry whereas others are cold and wet. In many areas, the carrying capacity during the winter is much lower than it is during the summer.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/General_Biology_1e_(OpenStax)/8%3A_Ecology/45%3A_Population_and_Community_Ecology/45.4%3A_Population_Dynamics_and_RegulationThe logistic model of population growth, while valid in many natural populations and a useful model, is a simplification of real-world population dynamics. Implicit in the model is that the carrying c...The logistic model of population growth, while valid in many natural populations and a useful model, is a simplification of real-world population dynamics. Implicit in the model is that the carrying capacity of the environment does not change, which is not the case. The carrying capacity varies annually: for example, some summers are hot and dry whereas others are cold and wet. In many areas, the carrying capacity during the winter is much lower than it is during the summer.
- https://bio.libretexts.org/Courses/Norco_College/BIO_5%3A_General_Botany_(Friedrich_Finnern)/25%3A_Population_Ecology/25.04%3A_Population_Dynamics_and_RegulationPopulations are regulated by a variety of density-dependent and density-independent factors. Species are divided into two categories based on a variety of features of their life history patterns: r-se...Populations are regulated by a variety of density-dependent and density-independent factors. Species are divided into two categories based on a variety of features of their life history patterns: r-selected species, which have large numbers of offspring, and K-selected species, which have few offspring.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/18%3A_Ecological_Succession/18.02%3A_What_are_the_Effects_of_DisturbanceIn ecology, a disturbance is a temporary change in environmental conditions that causes a pronounced change in an ecosystem.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Map%3A_Raven_Biology_12th_Edition/54%3A_Ecology_of_Individuals_and_Populations/54.06%3A_Factors_that_Regulate_PopulationsThe logistic model of population growth, while valid in many natural populations and a useful model, is a simplification of real-world population dynamics. Implicit in the model is that the carrying c...The logistic model of population growth, while valid in many natural populations and a useful model, is a simplification of real-world population dynamics. Implicit in the model is that the carrying capacity of the environment does not change, which is not the case. The carrying capacity varies annually: for example, some summers are hot and dry whereas others are cold and wet. In many areas, the carrying capacity during the winter is much lower than it is during the summer.
