Biology 150 - Chapter 12 LEARN Quiz

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Why don’t ecosystems eventually run out of energy?

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Which of the following is most likely to be associated with dynamic equilibrium in an ecosystem?

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A coyote eats a rabbit, and burns off much of the calories it gains in maintaining body temperature. In this instance, what can we say about entropy and energy?

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Light is often more limiting in aquatic ecosystems than in terrestrial ecosystems.

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The effects of temperature and precipitation on Net Primary Productivity (NPP) are independent.

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Ecosystem X houses species with extremely large niches. What can we say is likely regarding the resistance and resilience of this ecosystem?

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You estimate kilograms of corn plants (including stalks, shoots, leaves, etc) produced per square meter per year in a field outside of Waterloo. This is best characterized as an estimate of:

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Ecosystem “A” retains most of its food web structure and species composition through a period marked by heavy pollution. Nearby Ecosystem ‘B’ however loses 50% of its species diversity and feeding links. Ecosystem ‘A’ is:

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Warm nutrient rich conditions favour growth of an algal bloom in a lake. In fall, the decomposing algae releases yet more nutrients into the lake which leads to an even worse algal bloom the following spring. This is an example of:

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Energy is recycled in detrital food chains.

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Which of the following ecosystems would you likely observe the highest trophic efficiency in?

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Which of the following is likely to have the highest concentrations of a biomagnifying contaminant?

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High level carnivores are often part of only one type of food chain – either grazing or detrital.

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Neither energy nor biomass pyramids can be inverted/upside down (ie. larger at the top than the bottom).

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Grazing and detrital food chains are independent are not connected.

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You are studying a three-level food chain (primary producers, herbivores, carnivores). 5000 calories of plant energy are produced. How many of these calories will be convertes into carnivore tissue?

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A snail that feeds on dead leaves is best characterized as:

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What variable(s) affect(s) the rate of decomposition? Select all that apply, if more than one.

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What are the eventual end products of decomposition?

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Where would we expect nutrient concentrations in streams to be highest?

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What human activities have been implicated in dropped water tables?

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Fertilizing a grassland with nitrogen is MOST likely to result in:

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Increasing temperatures are causing permafrost and tundra to melt. This causes faster decomposition rates and carbon release, and is an example of:

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Which of the following is/are potential direct or indirect cause(s) of climate warming? (Select all that apply)

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Which of the countries below uses the most oil per capita?

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Climate warming is thought to be related to which of the following ecological observations? (Select all that apply, if more than one)

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Globally, we know that climate-induced increases in terrestrial NPP will compensate up for climate-induced decreases in marine NPP.

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Nutrient run-off into marine coastal environments can cause:

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What factor(s) is/are affecting the health of coral reef ecosystems?

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Biology 150 (Organismal and Evolutionary Ecology), Chapter 12 (Ecosystem Ecology) LEARN Quiz

Biology 150 - Chapter 12 LEARN Quiz

Why don’t ecosystems eventually run out of energy?

Which of the following is most likely to be associated with dynamic equilibrium in an ecosystem?

A coyote eats a rabbit, and burns off much of the calories it gains in maintaining body temperature. In this instance, what can we say about entropy and energy?

Light is often more limiting in aquatic ecosystems than in terrestrial ecosystems.

The effects of temperature and precipitation on Net Primary Productivity (NPP) are independent.

Ecosystem X houses species with extremely large niches. What can we say is likely regarding the resistance and resilience of this ecosystem?

You estimate kilograms of corn plants (including stalks, shoots, leaves, etc) produced per square meter per year in a field outside of Waterloo. This is best characterized as an estimate of:

Ecosystem “A” retains most of its food web structure and species composition through a period marked by heavy pollution. Nearby Ecosystem ‘B’ however loses 50% of its species diversity and feeding links. Ecosystem ‘A’ is:

Warm nutrient rich conditions favour growth of an algal bloom in a lake. In fall, the decomposing algae releases yet more nutrients into the lake which leads to an even worse algal bloom the following spring. This is an example of:

Energy is recycled in detrital food chains.

Which of the following ecosystems would you likely observe the highest trophic efficiency in?

Which of the following is likely to have the highest concentrations of a biomagnifying contaminant?

High level carnivores are often part of only one type of food chain – either grazing or detrital.

Neither energy nor biomass pyramids can be inverted/upside down (ie. larger at the top than the bottom).

Grazing and detrital food chains are independent are not connected.

You are studying a three-level food chain (primary producers, herbivores, carnivores). 5000 calories of plant energy are produced. How many of these calories will be convertes into carnivore tissue?

A snail that feeds on dead leaves is best characterized as:

What variable(s) affect(s) the rate of decomposition? Select all that apply, if more than one.

What are the eventual end products of decomposition?

Where would we expect nutrient concentrations in streams to be highest?