Unit 30D Population and Community Dynamics
... Populations are the functioning units of individual species. Individuals within a population vary due to their genetic diversity and the demands of their environment, and interact with each other in many ways. Many populations together make up an ecological community, in which each population intera ...
... Populations are the functioning units of individual species. Individuals within a population vary due to their genetic diversity and the demands of their environment, and interact with each other in many ways. Many populations together make up an ecological community, in which each population intera ...
Population Growth and Interactions
... distribute randomly. Similarly, moose may congregate in small groups near food and shelter for periods of time during the winter. ...
... distribute randomly. Similarly, moose may congregate in small groups near food and shelter for periods of time during the winter. ...
population
... Concept 53.5: Many factors that regulate population growth are density dependent • There are two general questions about regulation of population growth: – What environmental factors stop a population from growing indefinitely? – Why do some populations show radical fluctuations in size over time, ...
... Concept 53.5: Many factors that regulate population growth are density dependent • There are two general questions about regulation of population growth: – What environmental factors stop a population from growing indefinitely? – Why do some populations show radical fluctuations in size over time, ...
continued - Linn-Benton Community College
... as a result of environmental resistance – This growth pattern, where populations increase to the maximum number sustainable by their environment and then stabilize, is called logistic population growth – The maximum population size that can be sustained by an ecosystem for an extended time without d ...
... as a result of environmental resistance – This growth pattern, where populations increase to the maximum number sustainable by their environment and then stabilize, is called logistic population growth – The maximum population size that can be sustained by an ecosystem for an extended time without d ...
Will Small Population Sizes Warn Us of Impending Extinctions?
... endangered (IUCN 2001) and because changes in numbers are the key measure used to quantify population viability in most situations (e.g., Gerber et al. 1999). This focus on population size as a measure of demographic health can be problematic for two reasons: first, equilibrium population size may b ...
... endangered (IUCN 2001) and because changes in numbers are the key measure used to quantify population viability in most situations (e.g., Gerber et al. 1999). This focus on population size as a measure of demographic health can be problematic for two reasons: first, equilibrium population size may b ...
Human overpopulation
Human overpopulation occurs if the number of people in a group exceeds the carrying capacity of the region occupied by that group. Overpopulation can further be viewed, in a long term perspective, as existing when a population cannot be maintained given the rapid depletion of non-renewable resources or given the degradation of the capacity of the environment to give support to the population.The term human overpopulation often refers to the relationship between the entire human population and its environment: the Earth, or to smaller geographical areas such as countries. Overpopulation can result from an increase in births, a decline in mortality rates, an increase in immigration, or an unsustainable biome and depletion of resources. It is possible for very sparsely populated areas to be overpopulated if the area has a meager or non-existent capability to sustain life (e.g. a desert). Advocates of population moderation cite issues like quality of life, carrying capacity and risk of starvation as a basis to argue against continuing high human population growth and for population decline.