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 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.
Which of the following organisms is K strategist?
Examples of K-selected species include birds, larger mammals (such as elephants, horses, and primates), and larger plants.
Examples of r-selected species are marine invertebrates, such as jellyfish, and plants, such as the dandelion. Dandelions have small seeds that are dispersed long distances by wind; many seeds are produced simultaneously to ensure that at least some of them reach a hospitable environment.
Are turtles R or K-selected?
Similarly, reptiles such as sea turtles display both r- and K-traits: although sea turtles are large organisms with long lifespans (provided they reach adulthood), they produce large numbers of unnurtured offspring.
Are sea turtles R or K-selected?
r/K selection as a continuous spectrum 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.
Why are elephants K-selected species?
(a) Elephants are considered K-selected species as they live long, mature late, and provide long-term parental care to few offspring. Oak trees produce many offspring that do not receive parental care, but are considered K-selected species based on longevity and late maturation.
What does K selection mean?
K-selection: On the other extreme are species that are highly K-selected. K refers to the carrying capacity, and means that the babies are entering a competitive world, in a population at or near its carrying capacity. … K-selected species produce offspring that each have a higher probability of survival to maturity.
Why are endangered species K-selected?
Endangered species are likely to be K-selected species because they produce fewer offspring and breed less frequently. They also have a later reproductive age and a low population growth rate.
Are gorillas K-selected species?
Examples of animals that pursue K strategies are gorillas and whales. The largest of the primates, gorillas require specialized diets (with distinct differences in the diets of mountain and lowland gorillas) and produce a single offspring once every three to four years.
Which of the following is a typical K-selected species adaptation?
Which of the following is a typical K-selected species’ adaptation? K-selected species have a low biotic potential but high survivorship in part because of extended care for their young.
Which of the following is generally true of K strategist species as compared to R strategist species?
Which of the following is generally true of K-strategist species as compared to r-strategist species? They have longer life spans.
Is a coyote AK selected species?
While still considered a K- selected species, coyotes are further along the continuum toward r-selected species than the giant panda because of a higher number of offspring and a shorter weaning period. Coyotes mate for life, and a female will usually bear a litter of 2 ” 12 pups in the spring months.
Are rabbits r-selected?
R-selected organisms, those emphasizing a fast growth rate, high number of offspring, include rabbits, bacteria, salmon, plants such as weeds and grasses, etc.
Is tortoise a K selected species?
Examples of organisms undergoing K-selection are tortoises, elephants, people, and sequoia trees: their offspring are few but long-lived. In summary, r-selection is selection for quantity, K-selection for quality of offspring.
Are salmon r-selected?
🐻 Bears are known as a “K-selected” species, meaning they have just a few offspring but with long, intense parental involvement. 🐟 The salmon’s strategy is quantity. As an “R-selected” species, they have many offspring, laying up to 4,000 eggs per nest, but have no parental involvement whatsoever.
Which would decrease the human carrying capacity?
Carrying capacity could also be reduced if each individual within the species consumed less from the environment. Think about humans: if every human needs a four car garage and a large house, the planet can sustain fewer humans than if each human lived in a studio apartment and traveled using a bicycle.
What is the primary factor that distinguishes k-selected species and r selected species?
The r selected species live in populations that are highly variable. The fittest individuals in these environments have many offspring and reproduce early. K selected species live in populations that are at or near equilibrium conditions for long periods of time.
What is the difference between R and K strategies?
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.
Which species is most likely an r-selected and which species is most likely a K-selected species?
Pest species are likely to be r-selected species because they are small and have a short life span. They also have a high population growth rate. Endangered species are likely to be K-selected species because they produce fewer offspring and breed less frequently.
Which characteristics of species will most likely to become extinct?
Many rare and/or endemic species exhibit one or more of the following attributes which make them especially prone to extinction: (1) narrow (and single) geographical range, (2) only one or a few populations, (3) small population size and little genetic variability, (4) over-exploitation by people, (5) declining …
Which countries do you think are most guilty for endangering life?
Indonesia has more endangered mammal species than any other country, according to World Bank data.
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.
Is a frog an r-selected species?
Other examples of r-selected species include frogs, bacteria, and dandelions. On the other end of the spectrum are K-selected species, which are creatures like the elephant. Since they’re larger and have longer life expectancies, they don’t need to put all of their energy into growing and maturing up front.
What does K selection refer to quizlet?
“k” conceptually refers to the carrying capacity of the logistic growth equation. What is k-selection defined as? Selection that favors a more effective utilization of resources.
What does K selection refer to anthropology?
K-selected. Pertaining to K selection, and adaptive strategy whereby individuals produce relatively few offspring, in whom they invest increased parental care. Although only if you infants are born, chances of survival are increased for each one because of parental investments in time and energy.
Why are r-selected species invasive?
R-selected species often grow quickly and mature rapidly. Combined with their explosive reproductive potential, their quick growth and maturation allow them to colonize disturbed and early successional habitats remarkably well. This is not to suggest that all r-selected species are invasive.
What are the characteristics of an 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.
Is northern spotted owl a pioneer species?
Correct statements about the Northern spotted owl include which of the following? I. It is a pioneer species that is an opportunistic feeder.
Which of the following best describes the spotted Lanternfly in the United States?
Which of the following best describes the spotted lanternfly in the United States? The spotted lanternfly is an r -selected and invasive species. The diagram above illustrates how the number of individuals in a population changed with time as a result of external stresses and resource limitations.
Are pandas specialists?
Pandas are an excellent example of a herbivore specialist, because they have a specific niche that they live in and their diet consists only of bamboo.
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.
Are cats R or K strategists?
Cats and dogs are r-selected compared to humans, but K-selected compared to mice and rats. Mice and rats, in turn, are K-selected compared to most insects. We can think of an r-K selection continuum and an organism’s position along it in a particular environment at a given instant in time (Pianka 1970).
Are ants r-selected species?
These include fried crickets, earthworms, scorpions, steamed bugs, cockroaches, ant eggs and all sorts of bugs. These are all r-strategists since they reproduce rapidly but many find unpalatable despite their respectable nutritional value.
Are humans Iteroparous?
Humans (Homo sapiens) are an example of iteroparous species ” humans are biologically capable of having several offspring during their lives. Iteroparous vertebrates include birds, reptiles, fishes, and mammals (Angelini and Ghiara 1984).
What happens if a population crosses the carrying capacity?
If a population exceeds carrying capacity, the ecosystem may become unsuitable for the species to survive. If the population exceeds the carrying capacity for a long period of time, resources may be completely depleted. Populations may die off if all of the resources are exhausted.
What are some things that could happen when the human population reaches its carrying capacity?
When we will reach our carrying capacity (I hope we will not see anytime), water, food, shelter and resources will be very limited (per capita). People will be unhappy due to hunger (or maybe due to other reasons). Wars might start to control food and/or water resources.
What is the maximum population size an environment can support?
The carrying capacity of an environment is the maximum population size of a biological species that can be sustained by that specific environment, given the food, habitat, water, and other resources available.
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 species are both R and K-selected?
Which of the following organism is K strategies?
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.
Why are elephants K-selected species?
(a) Elephants are considered K-selected species as they live long, mature late, and provide long-term parental care to few offspring. Oak trees produce many offspring that do not receive parental care, but are considered K-selected species based on longevity and late maturation.
Why are endangered species K-selected?
Endangered species are likely to be K-selected species because they produce fewer offspring and breed less frequently. They also have a later reproductive age and a low population growth rate.
Which of the following is an expected characteristic of K-selected populations?
The ‘K’ in K-selected populations refers to the carrying capacity. The offspring of a K-selected population are entering a competitive environment where the population is at, or near, its carrying capacity. The population below its carrying capacity will increase and will decrease above its carrying capacity.
Which of the following is a typical K-selected species adaptation?
Which of the following is a typical K-selected species’ adaptation? K-selected species have a low biotic potential but high survivorship in part because of extended care for their young.