What are 4 examples of density-dependent factors?
Density-dependent factors include competition, predation, parasitism and disease.
Are K-selected species density-dependent factors?
Whereas density-independent factors limit r-selected species in unpredictable environments, K-selected species are adapted to stable environments and regulated by density-dependent factors.
What are some examples of density-dependent factors?
Density-dependent factors include disease, competition, and predation. Density-dependant factors can have either a positive or a negative correlation to population size. With a positive relationship, these limiting factors increase with the size of the population and limit growth as population size increases.
Are K strategists density-dependent?
Explanation: K-strategist populations are more commonly regulated by density-dependent limiting factors. Their population sizes hover around a carrying capacity that is dependent on factors that increase in severity with the density of the population.
Is earthquake density dependent?
density-independent factor Any factor limiting the size of a population whose effect is not dependent on the number of individuals in the population. An example of such a factor is an earthquake, which will kill all members of the population regardless of whether the population is small or large.
What are the factors that affect K-selected organism most?
K-selected species are characterized by long gestation periods lasting several months, slow maturation (and thus extended parental care), and long life spans. In addition, they tend to inhabit relatively stable biological communities, such as late-successional or climax forests (see ecological succession).
What human activities are examples of density independent limiting factors?
Bio. Ch. 5.2
| A | B |
|---|---|
| Give examples of density-independent limiting factors in a population. | Natural disasters can cause a sudden decline in population, as can human activities (damming a river; over-cutting a forest); unusual weather; seasonal cycles. |
What are examples of 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.
Is Grasshopper are K-selected species?
Morabines grasshopper is an example of K-strategists. A Population of this species may contain only a few of individuals (low reproduction rate) but with the ability to survive in the environment by using mimicry/ camouflage on the plants where they are life (Matthews and Kitching, 1984).
Which is an example of a species with K-selected adaptations?
Examples of K-selected species include birds, larger mammals (such as elephants, horses, and primates), and larger plants.
What is density dependent?
density-dependent factor, also called regulating factor, in ecology, any force that affects the size of a population of living things in response to the density of the population (the number of individuals per unit area).
How are r-selected and K-selected populations affected?
Both r – Selected and K – Selected populations are affected by both density-dependent and density-independent environmental factors. Density-independent factors like severe weather may cause big drops in populations (even local extinction) but seldom serve as the major factor controlling the population.
Which is an example of a density dependent factor?
Density-dependent limiting factors cause a population’s per capita growth rate to change—typically, to drop—with increasing population density. One example is competition for limited food among members of a population.
What are the factors of K selected species?
For K – Selected species, they are usually intra-specific factors like territoriality or competition. For r – Selected species , they are more likely to be inter-specific factors like disease or predation.
Why are density dependent factors in fish tank?
These factors are density dependent because they will become drastically more limiting as more fish are added to the fish tank. In a tank with a low density of fish, each fish has its own space, and has plenty of oxygen. The filter and aerator add oxygen to the water as fast as the fish can consume it, so there is plenty.