Environmental Studies ยท Biology

Ecology and Biodiversity

1,739 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

Which of the following is NOT a method for measuring functional diversity?

  1. Trait-based approaches

  2. Phylogenetic approaches

  3. Community-weighted mean traits

  4. Species richness
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Species richness is a measure of the number of species in a community, while functional diversity is measured using trait-based or phylogenetic approaches.

Multiple choice

What is functional redundancy?

  1. The overlap in functional traits among species

  2. The number of species that perform the same function

  3. The degree to which different species contribute to ecosystem functioning

  4. The relationship between functional diversity and ecosystem functioning
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Functional redundancy refers to the overlap in functional traits among species within a community, indicating that multiple species may perform similar ecological functions.

Multiple choice

Which of the following is NOT a challenge in measuring functional diversity?

  1. Data limitations

  2. Trait selection

  3. Trait measurement

  4. Species identification
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Species identification is not typically considered a challenge in measuring functional diversity, as it is a prerequisite for any ecological study.

Multiple choice

What is the term used to describe the loss of functional diversity within a community?

  1. Functional homogenization

  2. Functional redundancy

  3. Functional divergence

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

Functional homogenization refers to the loss of functional diversity within a community, often due to factors such as habitat loss, pollution, or climate change.

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

Which of the following is NOT an ecosystem service provided by soil biodiversity?

  1. Nutrient cycling

  2. Water filtration

  3. Carbon sequestration

  4. Erosion control
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Erosion control is not directly related to soil biodiversity, but rather to the physical properties of the soil and the presence of vegetation.

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.