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

What is the relationship between functional diversity and ecosystem stability?

  1. Functional diversity has no effect on ecosystem stability

  2. Functional diversity has a positive effect on ecosystem stability

  3. Functional diversity has a negative effect on ecosystem stability

  4. The relationship between functional diversity and ecosystem stability is unclear
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Functional diversity has a positive effect on ecosystem stability because it allows ecosystems to perform a wider range of functions. This makes ecosystems more resilient to environmental change and more likely to be able to recover from disturbances.

Multiple choice

What is the primary role of decomposers in an ecosystem?

  1. To break down dead organisms and organic matter

  2. To produce oxygen through photosynthesis

  3. To consume and digest other organisms

  4. To regulate the Earth's climate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Decomposers, such as bacteria, fungi, and invertebrates, play a crucial role in ecosystems by breaking down dead organisms and organic matter into simpler compounds, which are then released back into the environment and made available for other organisms to use.

Multiple choice

How does species diversity affect decomposition rates in ecosystems?

  1. It has no effect on decomposition rates

  2. It increases decomposition rates

  3. It decreases decomposition rates

  4. The effect depends on the specific ecosystem and decomposer community
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The effect of species diversity on decomposition rates can vary depending on the specific ecosystem and the composition of the decomposer community. In some cases, higher species diversity can lead to increased decomposition rates due to functional complementarity and niche partitioning among decomposer species. However, in other cases, the effect may be neutral or even negative due to competition or other interactions among decomposers.

Multiple choice

Which of the following is NOT a factor that can affect the rate of nutrient cycling in an ecosystem?

  1. Climate

  2. Soil type

  3. Vegetation cover

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

While climate, soil type, and human activities can all affect the rate of nutrient cycling in an ecosystem, vegetation cover is not a direct factor that influences nutrient cycling rates. Vegetation can indirectly affect nutrient cycling through its impact on soil properties, decomposition rates, and nutrient uptake.

Multiple choice

The idea that humans are fundamentally separate from and superior to the natural world is known as:

  1. Anthropocentrism

  2. Biocentrism

  3. Ecocentrism

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

Anthropocentrism places humans at the center of the universe, viewing nature as a resource to be exploited for human benefit.

Multiple choice

What is the significance of keystone species in ecosystems?

  1. They play a disproportionately large role in maintaining ecosystem structure and function.

  2. They are the most abundant species in an ecosystem.

  3. They are the top predators in an ecosystem.

  4. They are the most visible species in an ecosystem.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Keystone species have a disproportionate impact on their ecosystems relative to their abundance, playing crucial roles in maintaining ecosystem structure, function, and stability.

Multiple choice

What is the term used to describe the interconnectedness and interdependence of species within an ecosystem?

  1. Biodiversity.

  2. Ecosystem services.

  3. Ecological niche.

  4. Food web.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A food web is a complex network of interconnected food chains, representing the feeding relationships between different species in an ecosystem, highlighting their interdependence.

Multiple choice

Which of the following is an example of an ecosystem service provided by nature?

  1. Clean air and water.

  2. Pollination of crops.

  3. Regulation of climate.

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

Ecosystem services are the benefits that humans derive from the natural environment, including clean air and water, pollination of crops, regulation of climate, and many others.

Multiple choice

What is functional diversity?

  1. The variety of species in an ecosystem

  2. The variety of traits that species possess

  3. The variety of ways in which species interact with each other

  4. The variety of ways in which species use resources
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Functional diversity refers to the variety of traits that species possess, which can influence their roles and interactions within an ecosystem.

Multiple choice

Which of the following is not an example of an ecosystem service?

  1. Pollination

  2. Climate regulation

  3. Water purification

  4. Food production
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Food production is not an ecosystem service, as it is a direct product of human activity rather than a natural process.

Multiple choice

Which of the following is not a factor that can influence functional diversity?

  1. Climate

  2. Habitat structure

  3. Species interactions

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

Climate is not a factor that can influence functional diversity, as it is a global phenomenon that affects all ecosystems equally.

Multiple choice

What is the relationship between functional diversity and ecosystem services?

  1. Functional diversity is a prerequisite for ecosystem services

  2. Ecosystem services are a prerequisite for functional diversity

  3. Functional diversity and ecosystem services are independent of each other

  4. There is no relationship between functional diversity and ecosystem services
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Functional diversity is a prerequisite for ecosystem services, as the variety of traits that species possess enables them to perform a wide range of functions that contribute to ecosystem functioning.

Multiple choice

How can functional diversity be measured?

  1. By calculating the number of species in an ecosystem

  2. By measuring the abundance of each species in an ecosystem

  3. By calculating the diversity of functional traits in an ecosystem

  4. By measuring the interactions between species in an ecosystem
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Functional diversity can be measured by calculating the diversity of functional traits in an ecosystem, as this provides a quantitative assessment of the variety of roles that species play.

Multiple choice

Which of the following is not a factor that can affect the functional diversity of an ecosystem?

  1. Climate

  2. Habitat structure

  3. Species interactions

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

Pollution is not a factor that can affect the functional diversity of an ecosystem, as it is a human-made phenomenon that does not directly influence the variety of traits that species possess.

Multiple choice

Which of the following is not an example of a functional diversity metric?

  1. Functional richness

  2. Functional evenness

  3. Functional divergence

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

Species richness is not a functional diversity metric, as it does not take into account the variety of traits that species possess.