What is the difference between R selection and K selection?
r-selected babies grow rapidly, and tend to be found in less competitive, low quality environments. K-selected species produce offspring that each have a higher probability of survival to maturity.
What is the difference between R and K strategists?
The key difference between r strategist and K strategist is that the r strategist lives in unstable and unpredictable environments while the K strategist lives in more stable environment. Because of this environmental conditions, the r strategists produce many offspring while the K strategists produce few offsprings.
Are human r-selected or K selected?
Elephants, humans, and bison are all k-selected species. On the other hand, r-selected species often inhabit unstable environments and are completely density independent. These species often have short life expectancies, produce as many offspring as they can, and invest very low amounts of parental care.
What are r-selected species?
r-selected species, also called r-strategist, species whose populations are governed by their biotic potential (maximum reproductive capacity, r). The production of numerous small offspring followed by exponential population growth is the defining characteristic of r-selected species.
What is type2 survivorship?
A type II survivorship curve shows a roughly constant mortality rate for the species through its entire life. This means that the individual’s chance of dying is independent of their age. Type II survivorship curves are plotted as a diagonal line going downward on a graph.
What does it mean to say that R K selection is a continuum?
Quick Reference A dimension along which natural selection is claimed by some sociobiologists to vary according to ecological conditions, from r-selection at one extreme to K-selection at the other.
What are the characteristics of K-selected species?
K-selected species are characterized by long gestation periods lasting several months, slow maturation (and thus extended parental care), and long life spans. In addition, they tend to inhabit relatively stable biological communities, such as late-successional or climax forests (see ecological succession).
Are Dogs R or K-selected species?
Indeed, one can think of a given organism as an “r-strategist” or a “K-strategist” only relative to some other organism; thus statements about r and K selection are invariably comparative. Cats and dogs are r-selected compared to humans, but K-selected compared to mice and rats.
Are dogs K-selected or R selected?
Are dogs K or R strategists? Indeed, one can think of a given organism as an “r-strategist” or a “K-strategist” only relative to some other organism; thus statements about r and K selection are invariably comparative. Cats and dogs are r-selected compared to humans, but K-selected compared to mice and rats.
What is K strategist?
K-selected species, also called K-strategist, species whose populations fluctuate at or near the carrying capacity (K) of the environment in which they reside. K-selected species are characterized by long gestation periods lasting several months, slow maturation (and thus extended parental care), and long life spans.
What are the 3 types of survivorship?
There are three types of survivorship curves. Type I curves depict individuals that have a high probability of surviving to adulthood. Type II curves depict individuals whose chance of survival is independent of age. Type III curves depict individuals that mostly die in the early stages of their life.
What does K-selection mean?
K-selected species, also called K-strategist, species whose populations fluctuate at or near the carrying capacity (K) of the environment in which they reside. Such species make up one of the two generalized life-history strategies posited by American ecologist Robert MacArthur and American biologist Edward O.
What is the difference between K – selected and your – selected?
In a nutshell, R selected populations are more “YOLO” type while K selected populations are more “dig in and play for the future” type.
What does K selected mean?
K selection. Ecology. selection occurring when a population is at or near the carrying capacity of the environment, which is usually stable: tends to favor individuals that successfully compete for resources and produce few, slowly developing young, and results in a stable population of long-lived individuals.Compare r selection.
What are some examples of K – selected?
Examples of K-selected species include birds, larger mammals (such as elephants, horses, and primates), and larger plants.
What is K selection in biology?
K selection A type of selection that favours organisms with a low rate of reproduction but whose populations expand to the maximum number of individuals that the habitat can support (the carrying capacity of the habitat).