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Ecological death is the inability of an organism to function in an ecological context, leading to death. [1] This term can be used in many fields of biology to describe any species .
In one study, samples were collected from four sites (13 stations) in the Amazon where crude oil was the main pollutant. Water from Site B, a drinking pond located 100 meters from an active oil pit, had the highest concentration of total petroleum hydrocarbons (TPH). Sediment samples from the area were found to be acutely phototoxic. This ...
Population ecology is a sub-field of ecology that deals with the dynamics of species populations and how these populations interact with the environment, such as birth and death rates, and by immigration and emigration.
These proposed relationships lead to the hypothesis that intermediate disturbance levels would be the optimal amount of disorder within an ecosystem. Once K-selected and r-selected species can live in the same region, species richness can reach its maximum. The main difference between both types of species is their growth and reproduction rate.
Disease ecology is a sub-discipline of ecology concerned with the mechanisms, patterns, and effects of host-pathogen interactions, particularly those of infectious diseases. [1] For example, it examines how parasites spread through and influence wildlife populations and communities.
Human infectious diseases may be characterized by their case fatality rate (CFR), the proportion of people diagnosed with a disease who die from it (cf. mortality rate).It should not be confused with the infection fatality rate (IFR), the estimated proportion of people infected by a disease-causing agent, including asymptomatic and undiagnosed infections, who die from the disease.
The main equilibrium of a particular population is described by the equation: Number of Individuals = Biotic Potential/Resistance of the Environment (Biotic and Abiotic) [2] Chapman also relates to a "vital index", regarding a ratio to find the rate of surviving members of a species, whereas; Vital Index = (number of births/number of deaths)*100.
The difference between the birth rate and the death rate is the natural increase. If the population of a given organism is below the carrying capacity of a given environment, this environment could support a positive natural increase; should it find itself above that threshold the population typically decreases. [16]