Quick Answer: What Are The Differences Between R Selected And K Selected Species?

How do R and K selection influence survivorship curves?

How do survivorship curves relate to r selection and K selection in animals.

Ans: Populations described as r selection have traits that contribute to a high population growth rate.

K selection maximizes the chance of surviving in an environment where the number of individuals is near the carrying capacity..

What is the difference between R vs K selection quizlet?

K selection has a low number of offspring and a long life span; R selection has a higher number of offspring and short life span.

What is the difference between R and K selective provide an example of AK specialist species and an R specialist species?

The difference between R and K selective is the R selected species live in populations that are highly variable. K selected species live in populations that are at or near equilibrium for long periods of times. An example of a K selective species would be a Lion or Bear and a R selective species would be a fish.

What are examples of R selected species?

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 trees R or K strategists?

For instance, trees have traits such as longevity and strong competitiveness that characterise them as K-strategists. In reproduction, however, trees typically produce thousands of offspring and disperse them widely, traits characteristic of r-strategists.

Are Grizzly Bears K-selected?

The grizzly bear (Ursus arctos ssp.) Elephants and bears though, also take K-selection reproduction very seriously. … Because of the immense dedication mother’s provide for their cubs, many of a bear’s advantageous traits are attributable to this K-selection type reproduction style.

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 Lions R or K-selected?

Common examples of k-strategists species include humans, lions and whales.

Are bacteria 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.

What is the difference between R and K selective?

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.

Are humans R or K?

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.

Why r selected species tend to be opportunists?

Why do r-selected species tend to be opportunists? They reproduce and disperse rapidly when conditions are favorable or when disturbance opens up and a new habitat or niche for invasion. … They tend to reproduce later in life and have a small number of offspring with fairly long life spans.

Is yeast an R selected or K selected species?

Expert Answer Yeast is an r-selected because they indicate high biotic factor and produce many offspring within a short time.

Are birds r selected species?

In this equation N is the number of individuals in the population, t is time, and r is the biotic potential. Examples of K-selected species include birds, larger mammals (such as elephants, horses, and primates), and larger plants.

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 are characteristics of R selected populations quizlet?

Terms in this set (18)small body size. … short lived. … reproduce rapidly with usually many offspring. … very little parental care. … able to disperse rapidly and colonise new habitats. … population size very variable. … low competitive ability – unlikely to become dominant.More items…

Are frogs K 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.

Are dogs K 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.

Why are rabbits r selected species?

So this begs the question are rabbits truly prolific, and why? In Page 2 the 1960s two ecologists came up with r/K selection theory. It relates to parental investment and reproductive strategies adopted by species in order to advance its kind into the future. … And they have the ability to reproduce rapidly.

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 are the characteristics 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.