Traits that are thought to be characteristic of K-selection include
large body size, long life expectancy, and the production of fewer offspring
, which often require extensive parental care until they mature. Organisms whose life history is subject to K-selection are often referred to as K-strategists or K-selected.
Which of the following is a density independent factor limiting human population growth?
These density-independent factors include
food or nutrient limitation
, pollutants in the environment, and climate extremes, including seasonal cycles such as monsoons. In addition, catastrophic factors can also impact population growth, such as fires and hurricanes.
What are the four characteristics used to describe populations?
Four characteristics to describe populations are
geographic range, density and distribution, growth rate, and age structure
.
Which pair of terms most accurately describes life history traits for a stable population of wolves quizlet?
Which pair of terms most accurately describes life history traits for a stable population of wolves?
has a constant, instantaneous per capita growth rate
.
Which of the following is the characteristic of K?
Carrying Capacity
:
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.
What is a 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 is density independent limiting factors?
density-independent factor, also called limiting factor, in ecology,
any force that affects the size of a population of living things regardless of the density of the population
(the number of individuals per unit area).
Which of the following is a density independent limiting factor *?
Which of the following is a density-independent limiting factor?
Resource shortages triggered by increasing population size
are density-independent limiting factors.
Which of the following is a density-dependent limiting factor quizlet?
Acting separately or together, limiting factors determine the carrying capacity of an environment of species. Density-Dependent limiting factors include
competition predation herbivory parasitism disease and stress from overcrowding
.
What are the main characteristics used to describe and understand populations?
Population size and density
are the two main characteristics used to describe and understand populations. For example, populations with more individuals may be more stable than smaller populations based on their genetic variability, and thus their potential to adapt to the environment.
What are the 6 important characteristics of populations?
- Population Density: Population density refers to the size of any population in relation to some unit of space. …
- Natality: Natality refers to the rate of reproduction or birth per unit time. …
- Mortality: …
- Population Growth: …
- Age Distribution: …
- Population Fluctuations:
Which example best illustrates a Semelparous K selected species?
Which example best illustrates a semelparous, K-selected species?
Locusts (grasshoppers in the family Acrididae) undergo cyclic population outbreaks
, leading to massive swarms.
What are the 3 main characteristics of a population?
Three important characteristics of a population are :
(i) Population size and population density
. (ii) Birth or natality rate. (iii) Death or mortality rate. (i) Population size.
Which of these terms applies to the relationship between the human and the deer?
Which of these terms applies to the relationship between the human and the deer? (
The human is the predator and the deer is the prey
.)
Which of the following is an example of an abiotic factor in an ecosystem?
An abiotic factor is a non-living part of an ecosystem that shapes its environment. In a terrestrial ecosystem, examples might include
temperature, light, and water
. In a marine ecosystem, abiotic factors would include salinity and ocean currents.
What is a feature of R selected species quizlet?
r-selected species.
reproduce rapidly with usually many offspring
. r-selected species. Only $35.99/year. very little parental care.
Which of the following describes a stable population?
What describes a “stable population?” Explanation: A stable population is described as
one in which birth rate equals to death rate
, and the number of children is about equal to the number of reproducing adults.
Which of the following is an example of a density independent limitation on a population?
The category of density independent limiting factors includes
fires, natural disasters (earthquakes, floods, tornados)
, and the effects of pollution. The chances of dying from any of these limiting factors don’t depend on how many individuals are in the population.
Why might an r-selected species have a stable population?
They grow quickly and produce as many offspring as possible to carry on genetic information. … They instead devote their energy to one or two expensive or high-quality offspring that require significantly more care. R-selected species produce so many offspring because
it is not likely that many of them will survive
.
What is K and r-selected species?
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
.
What are density dependent and independent limiting factors?
Density-dependent limiting factors cause
a population’s per capita growth rate to change
—typically, to drop—with increasing population density. … Density-independent factors affect per capita growth rate independent of population density. Examples include natural disasters like forest fires.
What are density dependent and independent factors?
Density-dependent factors have
varying impacts according to population size
. Different species populations in the same ecosystem will be affected differently. Factors include: food availability, predator density and disease risk. Density-independent factors are not influenced by a species population size.
Which of the following are density independent factors quizlet?
Terms in this set (4)
Density-dependent factors: competition, predation, parasitism, and disease. Density-independent factors:
natural disasters, seasonal cycles, unusual weather, and human activity
.
Which of the following is an example of a density independent limitation on a population quizlet?
Density-INDEPENDENT limiting factors such as:
unusual weather such as hurricanes, droughts
, or floods, and natural disasters such as wildfires. competition, predation, herbivory, parasitism, disease, and stress from overcrowding.
Which of the following would be an example of a density independent factor?
Most density-independent factors are abiotic, or nonliving. Some commonly used examples include
temperature, floods, and pollution
. How could temperature be a factor in determining the density of a population? Imagine a heavily forested area that is home to a population of mosquitoes.
Which is an example of a density-dependent limiting factor?
Density-dependent limiting factors tend to be biotic—having to do with living organisms.
Competition and predation
are two important examples of density-dependent factors.
What is the measure that is used to describe the population?
Two important measures of a population are
population size
, the number of individuals, and population density, the number of individuals per unit area or volume. Ecologists often estimate the size and density of populations using quadrats and the mark-recapture method.
How do you describe population in statistics?
In statistics, a population is
the pool of individuals from which a statistical sample is drawn for a study
. Thus, any selection of individuals grouped together by a common feature can be said to be a population. A sample is a statistically significant portion of a population, not an entire population.
How do you describe population demographics?
Demographics can include
any statistical factors that influence population growth or decline
, but several parameters are particularly important: population size, density, age structure, fecundity (birth rates), mortality (death rates), and sex ratio (Dodge 2006). We introduce each of these in turn.
What are some density-dependent limiting factors and density-independent limiting factors that may influence the sea otter population as it tries to recover?
What are some density-dependent limiting factors and density-independent limiting factors that may influence the sea otter population as it tries to recover? Some density-dependent limiting factors are
predation
and density-independent limiting factors could be a storm and human activity.
Which of the following is an example of a density-dependent factor quizlet?
Examples of density-dependent factors that affect population growth include
predation, disease, and competition
.
What are the 3 types of population distribution?
Individuals of a population can be distributed in one of three basic patterns:
uniform, random, or clumped
.
What are characteristics of population growth?
They are described by characteristics that include:
population size: the number of individuals in the population
.
population density
: how many individuals are in a particular area. population growth: how the size of the population is changing over time.
What are the 4 characteristics of rapidly growing populations?
Population growth rate is how fast a population changes in size over time. It is determined by rates of
birth, death, immigration, and emigration
.
Which of the following is a trait of K selected species?
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).
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.
Are K selected species opportunists?
R-selected or opportunistic species are species that have high growth rates, produce many offspring, and have low survival odds for those many offspring. These species typically have little parental care and reproduce often. … Examples of k-selected species include
mammals such as humans, dolphins, and rhinos
.
