Exam 20: Ecosystems and the Biosphere

The trophic level transfer efficiency (TLTE) is defined as the product of 100 and the quotient of production at the trophic level of interest and the trophic level one position lower.If the primary producers in a particular ecosystem provide 5000 kcal/m²/yr and the primary consumers in this ecosystem produce 1000 kcal/m²/yr, what is the TLTE for these two trophic levels in this ecosystem?

Limited resources in a habitat exert an effect on population growth that is best represented by ________.(Outcome #7c)

The structure of the reef ecosystem is actually made from the skeletons of:

After a disturbance such as a wildfire, an ecosystem will undergo changes until it reaches a state of equilibrium similar to its pre-disturbance state.The ecosystem is said to have reached what?

Which of the following best describes spring turnover?

Bodies of fresh water undergo a process called turnover, which typically happens in the spring and in the fall.Which of the following best explains this phenomenon?

Which of the following correctly identifies an abiotic factor influencing the distribution of biomes?

Plants require nitrogen for life, but only certain forms of soil nitrogen are accessible to most plants.Which forms are directly useful to plants, and from where do these come?

Logistic population growth patterns are indicative of what?

The trophic level transfer efficiency (TLTE) is defined as the product of 100 and the quotient of production at the trophic level of interest and the trophic level one position lower.If the TLTE between primary producers in a particular ecosystem who provide 5000 kcal/m²/yr and the primary consumers in this ecosystem is 20%, what is the energy produced by the primary consumers?

Which two terrestrial biomes are most likely to exist adjacent to one another?

Trees in a hardwood forest are an example of what?

Bees are important pollinators of flowering plants.When bees are abundant in an ecosystem, flowering plants reproduce more successfully.More flowering plants mean more food and shelter for primary consumers.Bees are what kind of species?

Nitrogen is an essential element for plants, and most plants can only use certain forms of nitrogen.What are these forms and how do they become available in the soil?

What is the key difference between a foundation species and a keystone species in a given ecosystem?

What are the three primary ecosystem types?

Net production efficiency (NPE) is defined as the product of 100 and the quotient of net consumer productivity and assimilation.If the invertebrate primary consumers of an ecosystem exhibit a NPE of about 20% and pass on about 1000 kcal/m²/yr to secondary consumers, what is the assimilation of the primary consumers?

What on Earth is an ecosystem?

Which type of biome is characterized by very little rainfall?

Choose the best explanation for how human population growth adversely affects biodiversity.(Outcome #7c)