Succession and Extinction – Flashcards
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Ecological Succession is best described as
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it always occurs in a predictable pattern
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After a 5.1 earthquake, Mt. St. Helens erupted sending hot ash and pumice west, south, and east sides of the mtn.. This melted snow and ice at the top of the volcano and created volcanic mudflows. The type of change seen in the ecosystem around Mt St Helens after it erupted was....
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primary succession
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After 51 different wildfires started in Yellowstone Park, 794,000 acres of park were affected..this included about 24 percent of the whitebark pine , pine stands, and other plants and animals....the type of change seen in the ecosystem that were affected by these fires in Yellowstone Park?
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secondary succession
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the role of pioneer species in primary succession is
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to create the soil
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What is most likely to result immediately after a rainforest in Brazil is clear-cut?
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secondary succession
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Why are lichens a good pioneer species after a volcanic eruption?
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they are able to grow on bare rock
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After an ecosystem has experienced a flood, which types of plants would you expect to see growing first after the flood?
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small annual plants
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What disturbances would result in primary succession?
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the formation of Surtsey, a volcanic island off of the southern coast of Iceland
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What could result in secondary succession?
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an introduced species that devastates native plants as it feeds
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clear cutting
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could cause secondary succession
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How does conservation affect biodiversity?
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it helps to preserve biodiversity
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poaching and habitat loss
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are a threat to biodiversity
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Rhinos have decreased to near extinction. How would they be classified under the Endangered Species Act?
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endangered
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In one species of bird, there are three varieties of feather color...this is an example of....
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genetic diversity
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A hunter illegally kills a wolf in Yellowstone National Park and attempts to bring the wolf's skull back to Florida. The law that the hunter is violating is ....
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the Lacey Act
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Rhinos are being poached at a rate of two or three a week in Africat and Asia. Which type of diversity is being lost as the population of rhinos becomes very small?
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genetic diversity
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How could biodiversity affect humans?
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it may lead to the loss of potential medicines, foods, and products
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Primary succession is most likely caused by
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volcanic eruption
