Elephants, humans, and bison
are all k-selected species
. On the other hand, r-selected species often inhabit unstable environments and are completely density independent. These species often have short life expectancies, produce as many offspring as they can, and invest very low amounts of parental care.
Are Dogs R or K selected?
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.
What is an example of an R selected species?
Examples of r-selected species include
pest organisms
, such as rodents, insects, and weeds.
Is grass R or K 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 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.
What are the six characteristics of an R-selected species?
- Rapid development.
- High reproductive rate.
- Early reproductive age.
- Small body size.
- One reproductive cycle.
- Short lifespan.
- Poor competitive ability.
- High mortality of offspring.
Is a whooping crane R or K-selected?
Not much is known about the learning that takes place in this
K-selected
species over the almost one year that the young whooping crane colt remains with its adult parents.
Are trees K-selected?
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.
Which one is K-selected species?
Elephants, humans, and bison
are all k-selected species. On the other hand, r-selected species often inhabit unstable environments and are completely density independent. These species often have short life expectancies, produce as many offspring as they can, and invest very low amounts of parental care.
Are Squirrels R or K?
Most invertebrates are r-selected compared to vertebrates.
Tree squirrels are K-selected
compared to ground squirrels but rodents are r-selected compared to elephants, etc.
What are the benefits to being K-selected?
K-selected species
produce offspring that each have a higher probability of survival to maturity
. Although not always the case, K-selection is more common in larger animals, like whales or elephants, with longer lifespans and overlapping generations. The young tend to be altricial (immature, requiring extensive care).
What are K and R reproductive strategies?
| Characteristics of r- and K-selected organisms | r-organisms K-organisms | have large litters have small litters | reproduce at an early age reproduce at a late age | fast maturation slow maturation |
|---|
Are K-selected species generalists?
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.
Why are r-selected species 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.
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 dandelions r-selected species?
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.
