The population growth curve is sigmoid if the growth pattern isa)Geometricb)Accretionaryc)Logisticd)ExponentialCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Population growth curve is of two types - exponential and logistic growth. Logistic growth curve represents the population growth at present.When resources are limited then population exhibit logistic growth curve. It is sigmoid or S shaped indicating that population density of an organism increases at a fast rate initially. It hits a maturity phase where growth slows down and then stops.

Answer

A logistic curve is a common 'S' shape (sigmoid curve). S-shaped growth curve (sigmoid growth curve) is a pattern of growth in which, in a new environment, the population density of an organism increases slowly initially, in a positive acceleration phase; then increases rapidly, approaching an exponential growth rate...

Answer

Logistic Growth Pattern of Population

The correct answer is option 'C': Logistic.

Logistic growth refers to a type of population growth pattern that starts with slow growth, then accelerates, and finally levels off as the population approaches its carrying capacity. This growth pattern can be represented by a sigmoid curve, also known as an S-shaped curve. Let's explore this concept in more detail:

1. Introduction:
- The population growth curve illustrates how the population size changes over time.
- Different factors influence population growth, such as birth rate, death rate, immigration, and emigration.

2. Exponential Growth:
- Exponential growth occurs when a population increases by a fixed percentage each year.
- In the early stages of population growth, a species may experience exponential growth if resources are abundant and there are no limiting factors.
- Exponential growth is represented by a J-shaped curve, which shows rapid and continuous growth over time.

3. Carrying Capacity:
- The carrying capacity represents the maximum population size that an environment can sustainably support.
- As a population approaches its carrying capacity, the available resources become limited, leading to a decrease in growth rate.

4. Logistic Growth:
- Logistic growth takes into account the concept of carrying capacity.
- At the initial stages, the population grows slowly due to limited resources or other factors.
- As the population size increases, competition for resources intensifies, resulting in an increased death rate or reduced birth rate.
- Eventually, the growth rate slows down and reaches a point where the population size stabilizes near the carrying capacity.
- The logistic growth pattern is represented by an S-shaped (sigmoid) curve, with slow growth at the beginning, followed by accelerated growth, and finally leveling off.

5. Factors Influencing Logistic Growth:
- Various factors can influence the logistic growth pattern, such as availability of resources, predation, disease, competition, and environmental conditions.
- These factors can affect the birth and death rates, leading to fluctuations in the population size over time.

In summary, the population growth curve is sigmoid (S-shaped) when the growth pattern is logistic. This pattern takes into account the carrying capacity and represents the slow growth, acceleration, and eventual leveling off of a population as it approaches its maximum sustainable size.

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