Exam 18: Ecosystems

The figure below shows the net primary productivity (NPP)in terrestrial biomes around the world.The pattern of NPP in terrestrial ecosystems as shown suggest that

A tallgrass prairie or beech-maple woodland are examples of

In the diagram below,how do nutrient and energy flow differ?

What best explains this observation: consumers directly use approximately 20 percent of a forest's net primary productivity (NPP),whereas decomposers directly use approximately 80 percent?

If a person needs to consume 100 kcal of energy and he chooses to do that by eating soybeans,at least how many kcal of soybeans would have to grow to provide that 100 kcal for the human?

Which of the following describes the ultimate disposition of most energy in an ecosystem?

If there are 5,000,000 kcal of energy stored in grain that could be fed either to chickens or humans and there is a small village of starving people that need to be fed,what is the most efficient way to feed the majority of the villagers?

Match each term to its correct description below. -This biome is commonly found in both temperate and tropical latitudes.It does not receive enough moisture to support vigorous tree growth,so it is dominated by grasses and herbaceous plants.Burrowing rodents like voles and prairie dogs are common.

The chemical and physical components of an ecosystem are considered to be ________ or nonliving.

When humans consume rice they occupy which trophic level of a food chain?

On what four factors does net primary productivity rely,and what terrestrial ecosystem is the most productive because of these factors?

The amount of energy captured by photosynthetic organisms,minus the amount lost as heat from respiration and other life processes,is called ________.

Considering this food chain,explain how many calories are available in the consumer trophic levels and why.

Tuna are predatory fish that consume smaller,carnivorous fish that have fed on zooplankton.The zooplankton had fed on phytoplankton.You eat tuna,you are what level of the food chain?

Each level of an energy pyramid corresponds to a step in a food chain and is called a(n)________ level.

Ecologists often define an ecosystem by describing how ________ and ________ are acquired and distributed by the biotic community.

Which of the following are likely biotic components of a desert ecosystem?

Which of the following statements about cycling within an ecosystem is FALSE?

Other than the polar tundra,the LEAST productive terrestrial biomes tend to be

Match each term to its correct description below. -This biome is dominated by trees and shrubs adapted to relatively rich soil,snowy winters,and moist,warm summers.With oak,maple,hickory,beech,and elm,this biome displays good diversity.Squirrels,rabbits,deer,raccoons,beavers,bobcats,mountain lions,bears,and many amphibians and reptiles constitute the consumer community.