- What does R stand for in ecology?
- Are butterflies R strategists?
- Are K selected species generalists or specialists?
- What is a feature of R selected species?
- What are the four main characteristics of a population?
- What are three traits of an R strategist?
- Are birds R or K strategists?
- Why are rabbits R-strategists?
- Why are humans K-selected species?
- Are oak trees K-selected?
- Do you think humans exhibit traits of R or K selection?
- Are cats r selected species?
- What are K and R selected species?
- Are Lions R or K-selected?
- Are dogs K or R strategists?
- Are minnows R strategists?
- What animals are r strategists?
- Are K-selected species opportunists?
- What is r at carrying capacity?
- Are humans R strategists or K strategists?
- Are frogs K strategists?
What does R stand for in ecology?
The first variable is r (the intrinsic rate of natural increase in population size, density independent) and the second variable is K (the carrying capacity of a population, density dependent)..
Are butterflies R strategists?
predictable population increases. Butterflies, which are r-selected, normally experience high mortality throughout their life cycle. Scientists typically expect only about 1% of eggs to survive to reproductive maturity.
Are K selected species generalists or specialists?
When environmental conditions change, generalists are able to adapt, but specialists tend to fall victim to extinction much more easily. K-Selected species are species that have a low intrinsic growth rate, which causes the population to increase slowly until it reaches the carrying capacity of the environment.
What is a feature of R selected species?
The production of numerous small offspring followed by exponential population growth is the defining characteristic of r-selected species. They require short gestation periods, mature quickly (and thus require little or no parental care), and possess short life spans.
What are the four main characteristics of a population?
Population Size and Density: Total size is generally expressed as the number of individuals in a population.Population dispersion or spatial distribution.Age structure.Natality (birth rate)Mortality (death rate)Oct 9, 2018
What are three traits of an R strategist?
Among the traits that are thought to characterize r-selection are high fecundity, small body size, early maturity onset, short generation time, and the ability to disperse offspring widely. Organisms whose life history is subject to r-selection are often referred to as r-strategists or r-selected.
Are birds R or K strategists?
K-selected species are characterized by long gestation periods lasting several months, slow maturation (and thus extended parental care), and long life spans. … Examples of K-selected species include birds, larger mammals (such as elephants, horses, and primates), and larger plants.
Why are rabbits R-strategists?
In r and K selection theory, the rabbit is known as an r-strategist. R-strategists often live in unstable environments, so there’s little chance that their offspring would survive into adulthood. To solve this problem, r-strategists produce a ton of cheap offspring.
Why are humans 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.
Are oak trees K-selected?
Oak trees produce many offspring that do not receive parental care, but are considered K-selected species based on longevity and late maturation.
Do you think humans exhibit traits of R or K selection?
Humans definitely show characteristics of K-selection. Humans have a longer life span than many organisms. They also have few offspring.
Are cats r selected species?
r selected species are also known as r strategists and opportunistic species. They practice big-bang reproduction, AKA semelparity. … Cats are r-selected compared to humans, and K-selected compared to cockroaches.
What are K and R selected species?
r-selection: On one extreme are the species that are highly r-selected. r is for reproduction. Such a species puts only a small investment of resources into each offspring, but produces many such low effort babies….r- and K-selection.CharacteristicrKLifespanshortlongEarly mortalityhighlow6 more rows
Are Lions R or K-selected?
Common examples of k-strategists species include humans, lions and whales.
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.
Are minnows R strategists?
Select from the following list the species that are r-strategists: minnow, giraffe, human, beetle, bacteria, eagle, and cougar. Minnow,beetle and bacteria because they all have short lifespans and focus on quick reproduction.
What animals are r strategists?
Typical examples of r-species are mice, rabbits, weeds and bacteria, which have a lot of offspring, but a short life expectancy. Examples of organisms undergoing K-selection are tortoises, elephants, people, and sequoia trees: their offspring are few but long-lived.
Are K-selected species opportunists?
Explanation: R-selected or opportunistic species are species that have high growth rates, produce many offspring, and have low survival odds for those many offspring. … Examples of k-selected species include mammals such as humans, dolphins, and rhinos.
What is r at carrying capacity?
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 humans R strategists or K strategists?
Both across and within species, r and K strategists differ in a suite of correlated characteristics. Humans are the most K of all. K’s supposedly have a longer gestation period, a higher birthweight, a more delayed sexual maturation, a lower sex drive, and a longer life.
Are frogs K strategists?
Frogs produce many eggs, and a fraction live to reproduce themselves. They are an example of r-strategists. “r and K selection.” University of Miami: Department of Biology.