Ecology Part 3 Quiz

Shawangunk Grasslands National Wildlife Refuge has been developed from an abandoned airport to restore habitat for six species of birds that require an area rich in tall grasses. Workers must continually remove trees that are beginning to invade the area as a result of

• direct harvesting

• genetic engineering

• evolutionary change

• ecological succession

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Which plant species represent pioneer organisms?

• broomsedge and pine seedlings

• ragweed and aster

• crabgrass and horseweed

• oak and hickory trees

What is a characteristic of a stable environment?

• It usually contains only one type of producer.

• It usually contains a great diversity of species.

• It contains simple food chains that have more consumers than producers.

• It contains complex food webs that have more heterotrophs than autotrophs.

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The stable stage that is established in an area as a result of the process of ecological succession is known as the

• heterotroph community

• pioneer stage

• biotic stage

• climax community

Which example is not a natural process that could return a hardwood forest to the grass stage once again?

• a forest fire caused by a lightning strike

• the aging and falling of trees

• clearing the land for agriculture

• a hurricane or tornado

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The mass of plants shown in the graph refers to the mass of a number of

• populations

• decomposers

• ecosystems

• communities

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The time shown in the graph is most likely measured in

• days

• months

• weeks

• years

Based on the information provided in the graph, the process that is occurring is

• ecological succession

• biological evolution

• selective breeding

• genetic engineering

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Many bacteria and fungi are important in the environment because they

• return energy to the environment, making it available for plants

• recycle nutrients, making them available for other organisms

• produce glucose through the process of respiration

• reverse the flow of energy in the ecosystem

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The diagram below represents various factors in an area. The diagram best represents

• the recycling of energy in a forest community

• ecological succession after climatic changes

• competition for limited resources in a population

• the flow of materials in a forest community

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