Fire creates disturbance in the temperate coniferous forest of the Pacific Northwest. Prior to the early 1900s, patchy, moderately intense, and moderately frequent fires created intermediate amounts of disturbance. Following the early 1900s, a policy of fire suppression greatly reduced fires, creating low disturbance. Today, hotter, drier, longer summers are creating extremely large, intense, and frequent fires, which cause severe disturbance. Which of the following most accurately describes how these levels of disturbance affect species diversity? O Low disturbance allows for the greatest species diversity, because all the organisms are allowed to thrive. Severe disturbance allows for the greatest species diversity, because it facilitates colonization by r-selected species. O Moderate disturbance allows for the greatest diversity, because it allows both early and late successional species to exist within an ecosystem. O Disturbance does not generally affect species richness. O Severe disturbance allows for the greatest species diversity, because it facilitates colonization by species that exhibit a Type I survivorship curve.

Human Biology (MindTap Course List)
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Chapter25: Human Impacts On The Biosphere
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Fire creates disturbance in the temperate coniferous forest of the Pacific Northwest. Prior to the early 1900s,
patchy, moderately intense, and moderately frequent fires created intermediate amounts of disturbance.
Following the early 1900s, a policy of fire suppression greatly reduced fires, creating low disturbance. Today,
hotter, drier, longer summers are creating extremely large, intense, and frequent fires, which cause severe
disturbance. Which of the following most accurately describes how these levels of disturbance affect species
diversity?
O Low disturbance allows for the greatest species diversity, because all the organisms are allowed to thrive.
Severe disturbance allows for the greatest species diversity, because it facilitates colonization by r-selected species.
Moderate disturbance allows for the greatest diversity, because it allows both early and late successional species to exist
within an ecosystem.
Disturbance does not generally affect species richness.
Severe disturbance allows for the greatest species diversity, because it facilitates colonization by species that exhibit a
Type I survivorship curve.
Transcribed Image Text:Fire creates disturbance in the temperate coniferous forest of the Pacific Northwest. Prior to the early 1900s, patchy, moderately intense, and moderately frequent fires created intermediate amounts of disturbance. Following the early 1900s, a policy of fire suppression greatly reduced fires, creating low disturbance. Today, hotter, drier, longer summers are creating extremely large, intense, and frequent fires, which cause severe disturbance. Which of the following most accurately describes how these levels of disturbance affect species diversity? O Low disturbance allows for the greatest species diversity, because all the organisms are allowed to thrive. Severe disturbance allows for the greatest species diversity, because it facilitates colonization by r-selected species. Moderate disturbance allows for the greatest diversity, because it allows both early and late successional species to exist within an ecosystem. Disturbance does not generally affect species richness. Severe disturbance allows for the greatest species diversity, because it facilitates colonization by species that exhibit a Type I survivorship curve.
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