Which of the following could be considered the opposite of the density dependence seen in the standard logistic equation?
Genetic drift
.
What is the opposite of density-dependent?
External Websites. 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).
What is not a density-dependent?
The correct answer is
Flooding
. A density-dependent, growth limiting factors are of four types. They are predation, competition, parasitism, and disease. … The living organisms are related to the density-dependent growth limiting factors only this is also known as carrying capacity.
Is the logistic model density-dependent?
Density-dependent limiting factors can lead to a
logistic pattern of growth
, in which a population’s size levels off at an environmentally determined maximum called the carrying capacity. … When a population reaches a high density, there are more individuals trying to use the same quantity of resources.
What is density-dependent in population?
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.
What does density depend on?
Density (d) depends upon
the mass (m) and volume (v) of a substance
. The mass depends upon the amount of matter in a substance, whereas volume is the amount of space that a substance takes up.
What is the definition of density-dependent limiting factor?
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).
What are examples of density-dependent?
Density-dependent factors include
competition, predation, parasitism and disease
.
What is density independent and dependent?
Density-dependent factors have varying impacts according to population size. … Density-independent factors
are not influenced by a species population size
. All species populations in the same ecosystem will be similarly affected, regardless of population size. Factors include: weather, climate and natural disasters.
Is human activity density-dependent?
Density dependent factors can
only affect
a population when it reaches a certain density. … For example: natural disasters, temperature, sunlight, human activities, physical characteristics and behaviours of organisms affect any and all populations regardless of their densities.
What is an example of logistic growth?
Examples of Logistic Growth
Yeast
, a microscopic fungus used to make bread and alcoholic beverages, exhibits the classical S-shaped curve when grown in a test tube (Figure 19.6a). Its growth levels off as the population depletes the nutrients that are necessary for its growth.
What is density of a population?
In the U.S., population density is typically expressed as
the number of people per square mile of land area
. … In a broad sense, this number tells us how many people would live within one square mile if the U.S. population were evenly distributed across its land area.
Which model is considered as more realistic one?
The resources for the growth of most animal population are finite and become limiting sooner or later, thus
the logistic growth model
is considered more realistic.
What is positive density-dependent?
A positive density dependence is
one in which the population growth is regulated by an increased population density
. An example of a positive density dependence is observed in the population density of Schistosomes.
Can a population experience both positive and negative density-dependent effects?
Negative density-dependent effects occur if a vital rate decreases as density increases,
positive effects occur if both increase
. … As density increases in time, however, resources may become less available, each individual acquires less of the resource, and negative density dependence manifests itself.
What are the five factors that affect population?
- Economic development.
- Education.
- Quality of children.
- Welfare payments/State pensions.
- Social and cultural factors.
- Availability of family planning.
- Female labour market participation.
- Death rates – Level of medical provision.
