How is an R selected species different from a K-selected species?
They require short gestation periods, mature quickly (and thus require little or no parental care), and possess short life spans. Unlike K-selected species, members of this group are capable of reproduction at a relatively young age; however, many offspring die before they reach reproductive age.
What is an R strategist species?
R-strategists species show the complete opposite tendencies in reproduction, as compared to k-strategists. Their characteristics include: Breeding only once or twice in their lives. Having a huge number of offspring. Small size of both offspring and adults.
What animals are K-strategists?
Organisms whose life history is subject to K-selection are often referred to as K-strategists or K-selected. Organisms with K-selected traits include large organisms such as elephants, humans, and whales, but also smaller long-lived organisms such as Arctic terns, parrots and eagles.
What is the difference between a K and R strategist species quizlet?
Identify differences between K- and r-selected species. K-selected species are typically more adversely affected by invasive species than r-selected species, which are minimally affected by invasive species. Most invasive species are r-selected species.
What does K strategist 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.
What are two differences between R strategists and Kstrategists?
In the equations describing growth of populations of organisms, r represents the slope of the line representing exponential growth. The letter K represents the carrying capacity of a habitat for members of a given sort of organism.
Are sea turtles R or K strategists?
Similarly, reptiles such as sea turtles display both r- and K-traits: although large organisms with long lifespans (should they reach adulthood), they produce large numbers of unnurtured offspring.
What is R and K reproductive strategy?
The symbols r and K originate in the mathematics of population biology and refer to 2 ends of a continuum in which a compensatory exchange occurs between gamete production (the r-strategy) and longevity (the K-strategy).
What is an R strategist quizlet?
r-strategists. tolerate unpredictable conditions by using a wide variety of resources. k-strategists. thrive in predictable environments but compete for high-quality resources.
What are K-selected species?
K-selected species possess relatively stable populations fluctuating near the carrying capacity of the environment. These species are characterized by having only a few offspring but investing high amounts of parental care. Elephants, humans, and bison are all k-selected species.
What is an R species?
r-selected species are defined as those present in fluctuating environments that have large numbers of offspring and do not provide long-term care after birth.
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. 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 R and K strategists?
The r and K strategists are two types of organisms categories under the basis of r and K selection. r strategist is the organism living in unstable environments.
What are the characteristics of K strategist species?
Characteristics of k-strategists. K strategist species show similar characteristics of reproduction like: Occasional breeding; Longer gestation periods and give birth to one or two offspring at a time; Offspring take time to grow, and do so under the constant care and supervision of their parents.
Why do K strategists reproduce so well?
So, they decided that they are better off focusing their energy on generating a few, healthy, complex offspring that can receive ample care so that they go on to survive till adulthood in a highly competitive world. K strategist species show similar characteristics of reproduction like:
What is an example of a K-strategist species?
Common examples of k-strategists species include humans, lions and whales. R-strategists “live” near the line of exponential growth r. These organisms are nowhere near the carrying capacity, and can therefore afford to grow their population.