What Are K-Selected Species?

What are the advantages of R Selection What are the advantages of K selection?

In a nutshell, R selected populations focus on quantity over quality.

They are mostly geared towards the time of repopulation, when an ecosystem needs to be “filled up” again.

K selected populations, on the other hand, are species that have very low mortality rates at childbirth..

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.

Are Squirrels k-selected?

Tree squirrels are K-selected compared to ground squirrels but rodents are r-selected compared to elephants, etc.

Can humans be r selected?

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. … R-selected species can include mosquitos, mice, and bacteria.

Are turtles R or K-selected?

Plants such as dandelions are another good example of an r-selected species. … Sea turtles are a good example of a species that fits somewhere in the middle. The produce many eggs and do not care for their offspring once the eggs have been laid, but turtles live very long lives.

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.

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 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.

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

What are K and R strategists?

The terms r-selection and K-selection are used by ecologists to describe the growth and reproduction strategies of organisms. r-selected species have a high growth rate but low survivability (“cheap” offspring) K-selected species have a low growth rate but high survivability (“expensive” offspring)

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 horses K-strategists?

Examples of K-selected species include birds, larger mammals (such as elephants, horses, and primates), and larger plants.

What is the R vs K theory?

In ecology, r/K selection theory relates to the selection of combinations of traits in an organism that trade off between quantity and quality of offspring. … In contrast, more stable environments allow parents to confidently invest in one offspring because they are more likely to survive to adulthood.

Are trees K selected species?

Examples of K-selected species are primates including humans, other mammals such as elephants, and plants such as oak trees. … The tree’s height and size allow it to dominate other plants in the competition for sunlight, the oak’s primary energy resource.

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.

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.

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.

Are Lions K-selected?

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