Search
- Filter Results
- Location
- Classification
- Include attachments
- https://bio.libretexts.org/Courses/Thompson_Rivers_University/Principles_of_Biology_II_OL_ed/04%3A_Ecology/4.02%3A_Population_Ecology/4.2.02%3A_What_is_Population_EcologyEcology is often defined as the study of the distribution and abundance of organisms. Population ecologists study what determines the occurrence and abundance of species in space and time: their geog...Ecology is often defined as the study of the distribution and abundance of organisms. Population ecologists study what determines the occurrence and abundance of species in space and time: their geographic ranges, population sizes and densities, what factors result in them being so rare or common, and why these characteristics change over time.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_10%3A_Population_modeling/10.2%3A_Demographic_ratesFour processes contribute to changes in population size: mortality, birth, immigration, and emigration. These and related quantities such as survival are called demographic rates. Understanding the ...Four processes contribute to changes in population size: mortality, birth, immigration, and emigration. These and related quantities such as survival are called demographic rates. Understanding the conceptual importance and mathematical characterization of these rates allows us to understand how and why a population changes over time.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/09%3A_The_Ecology_of_Populations/9.01%3A_What_is_population_ecologyOften, however, we do not have good estimates of the size of a population itself, but factors that should be correlated with the population size, such as the number of animals harvested by hunters or ...Often, however, we do not have good estimates of the size of a population itself, but factors that should be correlated with the population size, such as the number of animals harvested by hunters or trapped by ecologists or the density of dung found during a survey.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/10%3A_Population_modeling/10.02%3A_Demographic_ratesFour processes contribute to changes in population size: mortality, birth, immigration, and emigration. These and related quantities such as survival are called demographic rates. Understanding the ...Four processes contribute to changes in population size: mortality, birth, immigration, and emigration. These and related quantities such as survival are called demographic rates. Understanding the conceptual importance and mathematical characterization of these rates allows us to understand how and why a population changes over time.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/09%3A_The_Ecology_of_Populations/9.03%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. Note that in the former, the effect of the factor on the population depends on the density of the population at onset.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_9%3A_The_Ecology_of_Populations/9.3%3A_Population_Dynamics_and_RegulationThough there are many dimensions to spatial and temporal population dynamics, discussions of population dynamics often center on changes in population size over time. Population ecologists are often ...Though there are many dimensions to spatial and temporal population dynamics, discussions of population dynamics often center on changes in population size over time. Population ecologists are often tasked with determining if populations are increasing, stable, or declining. More complex patterns are also possible, such as rebounds after sharp declines or regular cycles. To understand what determines what a population does over time ecologists think about processes of population regulation -
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/4.2%3A_Population_Ecology/4.2.02%3A_What_is_Population_EcologyEcology is often defined as the study of the distribution and abundance of organisms. Population ecologists study what determines the occurrence and abundance of species in space and time: their geog...Ecology is often defined as the study of the distribution and abundance of organisms. Population ecologists study what determines the occurrence and abundance of species in space and time: their geographic ranges, population sizes and densities, what factors result in them being so rare or common, and why these characteristics change over time.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_9%3A_The_Ecology_of_Populations/9.1%3A_What_is_Population_EcologyEcology is often defined as the study of the distribution and abundance of organisms. Population ecologists study what determines the occurrence and abundance of species in space and time: their geog...Ecology is often defined as the study of the distribution and abundance of organisms. Population ecologists study what determines the occurrence and abundance of species in space and time: their geographic ranges, population sizes and densities, what factors result in them being so rare or common, and why these characteristics change over time.
