An ecosystem has a gross primary production (GPP) of $$2000$$ g C m⁻² yr⁻¹ and respiration of $$800$$ g C m⁻² yr⁻¹. What is its net primary production (NPP)?

Unlike energy flow, nutrients in an ecosystem:

A region experiences distinct wet and dry seasons, has scattered drought-resistant trees, and is dominated by grasses. Which human activity would most significantly alter the natural fire regime of this biome?

How is solar energy transferred from plants to herbivores in an ecosystem?

The residence time of carbon varies dramatically between different reservoirs. Which statement accurately compares carbon residence times and explains the environmental significance?

A marine ecosystem experiences an algal bloom followed by a massive die-off. What would environmental scientists expect to happen to dissolved oxygen levels in this water body?

Which process converts atmospheric nitrogen into a form usable by plants?

Which statement correctly describes the relationship between latitude and terrestrial biome distribution?

Net Primary Production (NPP) is defined by the relationship $$NPP = GPP - R$$, where GPP is Gross Primary Production and R is plant respiration. If an ecosystem has a GPP of 1800 g/m²/yr and respiration of 700 g/m²/yr, what is the net primary productivity?

All of the following are true about the Law of Tolerance except

Which of the following pieces of evidence best supports the role of symbiosis in species interactions?

In an ecosystem following the 10% energy rule, if the primary producers capture $$1000$$ joules of energy, how much energy is available to tertiary consumers?

Considering the law of tolerance, what happens if an environmental factor exceeds the tolerance limits of a species?

According to the 10% rule of energy transfer in ecosystems, only 10% of energy is passed from one trophic level to the next. If primary producers capture 10,000 Joules of energy, how much energy is available to tertiary consumers (three transfers from the producers)? Use the formula $$E_{tertiary}=10000*(0.1)^3$$.

Which of the following best describes mutualism?

Which process directly transfers carbon from the atmosphere to the biosphere?

Which of the following is an example of converting rainfall from inches to centimeters, if a desert receives $$20$$ inches of rainfall per year and $$1$$ inch equals $$2.54$$ cm?

How have aquatic photosynthesizers adapted to low light conditions?

In a temperate deciduous forest, a biologist is studying the impact of an invasive species of beetle that preys on oak trees. The beetle's presence has led to a significant decrease in oak tree population, affecting the forest's community structure. Given this scenario, which of the following best describes the role of oak trees in this ecosystem before the introduction of the invasive beetle?

Which statement best describes the flow of energy through trophic levels?