Ecology Quiz on Species Interactions

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Questions and Answers

What is the relationship called when two species compete for the same limited resources?

  • Competition (correct)
  • Commensalism
  • Predation
  • Herbivory

Which of the following best defines herbivory?

  • Consumption of a plant by an animal (correct)
  • A predatory behavior in mammals
  • A type of competition between species
  • A symbiotic relationship between two animals

In which type of symbiotic relationship does one species benefit while the other is harmed?

  • Mutualism
  • Parasitism (correct)
  • Commensalism
  • Predation

What term describes a close association between two species where both species benefit?

<p>Mutualism (A)</p> Signup and view all the answers

What is the term for the interaction where a predator consumes all or part of another species?

<p>Predation (A)</p> Signup and view all the answers

What type of interaction occurs when organisms compete for a limited resource?

<p>Competition (D)</p> Signup and view all the answers

In which type of ecological interaction is one organism benefited while the other is negatively affected?

<p>Predation (B)</p> Signup and view all the answers

What does the term 'intraspecific' refer to?

<p>Interactions within the same species (A)</p> Signup and view all the answers

Which of the following describes an interaction in which two or more species coexist in the same place and time?

<p>Interspecific relationships (D)</p> Signup and view all the answers

What is a key characteristic of predation in an ecosystem?

<p>Predators feed on other organisms (B)</p> Signup and view all the answers

What percentage of solar radiation is lost through reflection?

<p>30% (B)</p> Signup and view all the answers

How much solar radiation is used by photosynthetic organisms in a day?

<p>1.800 TW (B)</p> Signup and view all the answers

Which type of ecosystem receives the majority of solar radiation?

<p>Aquatic ecosystems (D)</p> Signup and view all the answers

What is the net primary productivity in TeraWatts?

<p>1,210 TW (A)</p> Signup and view all the answers

What part of solar radiation impacts photosynthesis and plant growth within ecosystems?

<p>Utilized energy (A)</p> Signup and view all the answers

What is one immediate effect of competition among organisms in ecosystems?

<p>Limited growth and reproduction (D)</p> Signup and view all the answers

How does competition function in an ecosystem?

<p>By limiting resources for organisms (D)</p> Signup and view all the answers

What does the symbol '$[+/-][-]$' suggest about competition?

<p>It has both positive and negative effects (D)</p> Signup and view all the answers

What role does competition play in the productivity of ecosystems?

<p>It regulates productivity and biodiversity (B)</p> Signup and view all the answers

Which of the following statements about competition in ecosystems is true?

<p>It can lead to a decrease in organism growth and reproduction (C)</p> Signup and view all the answers

How does increased biodiversity influence ecosystem productivity?

<p>Increased biodiversity leads to more efficient resource use. (C)</p> Signup and view all the answers

What role do decomposers play in enhancing ecosystem productivity?

<p>Decomposers improve material cycling. (C)</p> Signup and view all the answers

Which factor contributes to biodiversity's ability to maintain ecosystem productivity during crises?

<p>Resilience and stability of the ecosystem. (A)</p> Signup and view all the answers

Why is it important that biodiversity leads to reduced diseases in an ecosystem?

<p>It contributes to lower mortality rates and higher productivity. (B)</p> Signup and view all the answers

What is the primary reason complex trophic relationships contribute to increased productivity?

<p>They enhance energy transfer between species. (B)</p> Signup and view all the answers

What role does competition play in an ecosystem?

<p>It serves as a mechanism regulator to prevent overpopulation. (D)</p> Signup and view all the answers

How does excessive competition affect productivity in an ecosystem?

<p>It can cause a reduction in productivity. (D)</p> Signup and view all the answers

What is defined as the role a species plays in an ecosystem?

<p>Niche (A)</p> Signup and view all the answers

What occurs when competition is unequal among species?

<p>Competitors change their function to utilize alternative resources. (D)</p> Signup and view all the answers

What describes the predator-prey relationship?

<p>One species lives and feeds while the other dies. (A)</p> Signup and view all the answers

What does gross productivity refer to in an ecosystem?

<p>Total energy received by the ecosystem (A)</p> Signup and view all the answers

Which trophic level is primarily responsible for biomass generation through photosynthesis?

<p>Primary producers (D)</p> Signup and view all the answers

What is the difference between gross productivity and net productivity?

<p>Net productivity subtracts energy used by metabolism from gross productivity (B)</p> Signup and view all the answers

Which of the following factors can affect ecosystem productivity?

<p>Both internal and external factors (D)</p> Signup and view all the answers

Which of the following best describes the role of secondary consumers in an ecosystem?

<p>They derive energy by consuming primary consumers (C)</p> Signup and view all the answers

What measures the rate of productivity in an ecosystem?

<p>The amount of organic matter produced by photosynthetic organisms (A)</p> Signup and view all the answers

Which factor is NOT considered when measuring the rate of biomass production?

<p>Type of consumers present (B)</p> Signup and view all the answers

In which trophic level do photosynthetic organisms primarily function?

<p>Primary productivity level (C)</p> Signup and view all the answers

Which statement correctly describes secondary productivity in ecosystems?

<p>It encompasses the biomass produced by consumers. (B)</p> Signup and view all the answers

What determines the flow of energy accumulation in biomass?

<p>The rate of photosynthesis in primary producers (C)</p> Signup and view all the answers

Which internal factor contributes significantly to the productivity of an ecosystem?

<p>Genetic information (D)</p> Signup and view all the answers

What is considered an external factor that affects ecosystem productivity?

<p>Water (precipitation and humidity) (D)</p> Signup and view all the answers

How does the greenhouse effect impact ecosystem productivity?

<p>By increasing COâ‚‚ concentration (A)</p> Signup and view all the answers

Which of the following interactions is classified as an internal factor affecting ecosystem productivity?

<p>Symbiosis (B)</p> Signup and view all the answers

What role does biodiversity play in ecosystem productivity?

<p>It contributes to a wider gene pool. (A)</p> Signup and view all the answers

Flashcards

Competition

Two species use the same limited resources, harming each other.

Predation

One species eats another for food.

Herbivory

Animals eat plants.

Symbiosis

Two species living closely together.

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Mutualism

A symbiotic relationship where both species benefit.

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Ecological Interactions

Relationships between organisms in a biological community within an ecosystem, existing in the same place and time.

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Intraspecific Interactions

Relationships between organisms of the same species.

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Interspecific Interactions

Relationships between organisms of different species.

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Competition effect in ecosystems

Organisms with similar needs compete, limiting their growth and reproduction. This impacts ecosystem productivity and biodiversity.

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Ecosystem competition

Organisms compete for resources in an ecosystem, influencing the ecosystem's productivity and biodiversity.

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Organism growth

A species' productivity and reproduction are influenced by competition among similar organisms in their environment.

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Regulatory mechanism

Competition acts as a control mechanism in ecosystems to manage diversity and productivity.

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Biodiversity impact

Competition plays a crucial role in shaping the diversity of species within an ecosystem.

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Biodiversity's effect on productivity

Increased biodiversity leads to greater ecosystem productivity.

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Complex food webs

Many interconnected feeding relationships in an ecosystem.

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Efficient resource use in diverse ecosystems

Different species use resources in various ways, increasing overall efficiency.

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Role of decomposers

Decomposers break down matter, increasing nutrient cycling, leading to increased productivity.

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Biodiversity's resilience to crises

High biodiversity makes an ecosystem more resistant to disturbances or diseases.

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Solar Radiation on Earth

Our planet receives 173,000,000,000,000,000 Watts of solar radiation, but about 30% is reflected back into space.

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What happens to 70% of solar radiation?

70% of the solar radiation reaches Earth's surface and is used by ecosystems, driving processes like photosynthesis and influencing productivity.

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Net Primary Productivity

The amount of energy stored by plants after subtracting the energy used for their own metabolism.

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Solar Radiation and Photosynthesis

Solar radiation is crucial for photosynthesis, the process plants use to convert light energy into chemical energy, driving their growth.

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Solar Radiation and Ecosystem Productivity

Variations in solar radiation can lead to differences in the productivity of ecosystems, influencing the amount of plant life and overall biodiversity.

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Competition Effect

Competition can limit population growth by preventing overpopulation. However, excessive or minimal competition can reduce productivity.

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Ecological Niche

The specific role a species plays in an ecosystem.

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Natural Selection & Competition

When competition for resources is unequal, a species may adapt to use a substitute resource. This leads to the evolution of new, more efficient species.

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Predator-Prey Relationship

A relationship where one species (the predator) hunts and eats another species (the prey).

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Habitat

The natural environment where an organism lives.

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Ecosystem Productivity

The rate at which an ecosystem produces biomass, measured as the amount of organic matter created per unit area per unit time.

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Biocenosis

The living community of an ecosystem, including all the populations of plants and animals.

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Biotope

The physical environment of an ecosystem, including all the non-living factors like climate, soil, and water.

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Gene Pool

The total genetic variation within a population of organisms.

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Metabolic Pathway

A series of interconnected chemical reactions that occur within an organism, converting one molecule to another.

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Productivity

The ability of an ecosystem to produce biomass, measured by the rate of biomass creation.

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Primary Productivity

The rate at which producers, like plants, convert sunlight into biomass through photosynthesis.

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Secondary Productivity

The rate at which consumers, like animals, convert the biomass of their prey into their own biomass.

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Gross Productivity

The total amount of energy captured by an ecosystem or trophic level, before accounting for energy loss.

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Net Productivity

The energy remaining after subtracting the energy used for metabolism in an ecosystem or trophic level.

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Biomass

The total weight of living organisms in a given area or volume.

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Productivity Rate

The speed at which biomass is produced in an ecosystem, measured as weight per unit area per unit time.

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Study Notes

Ecosystem Interactions

  • Competition: Organisms of different species use limited resources, with one negatively impacting the other.
  • Predation: One species (the predator) consumes all or part of another species (the prey).
  • Herbivory: A type of predation where one species consumes a plant.
  • Symbiosis: An intimate relationship over a long period of time, where species live together.
  • Mutualism: A symbiotic relationship where both species benefit.
  • Commensalism: A symbiotic relationship where one species benefits, and the other neither benefits nor suffers.
  • Parasitism: A symbiotic relationship where one species (parasite) benefits, but the other (host) is negatively affected.

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