Environmental Studies ยท Biology

Ecology and Biodiversity

1,737 Questions

Ecology and biodiversity are vital topics in environmental studies, covering ecosystem structures, species diversity, and environmental impacts. These concepts are frequently tested in competitive examinations for civil services and state selections. The questions cover carrying capacity, ecological succession, and conservation fundamentals.

Species richness measurementTypes of ecological diversityBiome distribution factorsCarrying capacity conceptEcosystem servicesEnvironmental Impact Assessment

Ecology and Biodiversity Questions

Multiple choice

What is the term used to describe the variety of ecological functions performed by different species within an ecosystem?

  1. Functional Redundancy

  2. Functional Diversity

  3. Functional Equivalence

  4. Functional Complementarity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Functional diversity encompasses the range of ecological functions performed by different species in an ecosystem, highlighting the diversity of roles they play in maintaining ecosystem processes.

Multiple choice

Which of the following is NOT a key component of functional diversity?

  1. Species Richness

  2. Species Composition

  3. Trait Diversity

  4. Genetic Diversity
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

While species richness, species composition, and trait diversity are all important aspects of functional diversity, genetic diversity refers to the genetic variation within a species and is not directly related to the ecological functions performed by different species.

Multiple choice

Which of the following ecosystem functions is NOT directly influenced by functional diversity?

  1. Primary Production

  2. Decomposition

  3. Pollination

  4. Climate Regulation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Climate regulation is primarily influenced by factors such as greenhouse gas emissions and land use changes, rather than directly by the functional diversity of species within an ecosystem.

Multiple choice

Which of the following is an example of a functional group in a forest ecosystem?

  1. Trees

  2. Birds

  3. Decomposers

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In a forest ecosystem, trees, birds, and decomposers represent different functional groups based on their ecological roles. Trees are primary producers, birds are seed dispersers and predators, and decomposers break down organic matter.

Multiple choice

How can functional diversity be measured?

  1. Species Richness

  2. Trait Diversity

  3. Functional Group Diversity

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Functional diversity can be measured using various approaches, including species richness (number of species), trait diversity (variation in traits among species), and functional group diversity (number and composition of functional groups).

Multiple choice

What is the concept of 'keystone species' related to functional diversity?

  1. Keystone species have a disproportionately large impact on ecosystem function.

  2. Keystone species are always the most abundant species in an ecosystem.

  3. Keystone species are always top predators.

  4. Keystone species are not affected by changes in functional diversity.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Keystone species are those that have a disproportionately large impact on ecosystem function relative to their abundance. Their presence or absence can significantly affect the functioning of the entire ecosystem.

Multiple choice

How does functional diversity contribute to the stability of food webs?

  1. It reduces the risk of trophic cascades.

  2. It enhances the resilience of food webs to disturbances.

  3. It promotes efficient energy transfer through the food web.

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Functional diversity contributes to the stability of food webs by reducing the risk of trophic cascades, enhancing the resilience of food webs to disturbances, and promoting efficient energy transfer through the food web.

Multiple choice

What is the term used to describe the benefits that humans derive from ecosystems?

  1. Ecosystem Goods

  2. Ecosystem Services

  3. Ecological Benefits

  4. Natural Resources
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ecosystem services encompass the various benefits that humans obtain from natural ecosystems, such as clean air, water, food, and pollination.

Multiple choice

Which of the following is NOT considered an ecosystem service?

  1. Water purification

  2. Climate regulation

  3. Mineral extraction

  4. Pollination
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mineral extraction is a human activity that involves the removal of minerals from the Earth's crust, and it is not considered an ecosystem service as it does not directly benefit humans from the functioning of natural ecosystems.

Multiple choice

Which ecosystem service is essential for the survival of most terrestrial organisms?

  1. Pollination

  2. Water purification

  3. Oxygen production

  4. Soil formation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oxygen production is a fundamental ecosystem service as it provides the oxygen necessary for respiration, which is essential for the survival of most terrestrial organisms.

Multiple choice

What is the significance of biodiversity in the provision of ecosystem services?

  1. Biodiversity enhances the resilience of ecosystems to disturbances

  2. Biodiversity increases the productivity of ecosystems

  3. Biodiversity promotes the cycling of nutrients in ecosystems

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Biodiversity plays a crucial role in the provision of ecosystem services by enhancing the resilience of ecosystems to disturbances, increasing the productivity of ecosystems, and promoting the cycling of nutrients in ecosystems.

Multiple choice

Grasslands play a crucial role in the global carbon cycle by:

  1. Releasing large amounts of carbon dioxide

  2. Storing carbon in their soil and vegetation

  3. Increasing the rate of carbon sequestration

  4. Reducing the amount of methane in the atmosphere
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Grasslands act as carbon sinks by storing significant amounts of carbon in their soil and vegetation, contributing to the regulation of the global carbon cycle.

Multiple choice

Which of the following is NOT a supporting service provided by ecosystems?

  1. Soil formation

  2. Nutrient cycling

  3. Pollination

  4. Water purification
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pollination is a regulating service, not a supporting service.

Multiple choice

What is the primary factor that determines the distribution of pollinators in an ecosystem?

  1. Climate

  2. Habitat availability

  3. Food availability

  4. Competition
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The availability of suitable habitat (e.g., nesting sites, food sources) is the primary factor that determines the distribution of pollinators in an ecosystem.

Multiple choice

What is the primary factor that determines the rate of decomposition in ecosystems?

  1. Temperature

  2. Moisture

  3. Oxygen availability

  4. pH
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Temperature is the primary factor that determines the rate of decomposition in ecosystems, as it affects the activity of decomposer organisms.