DU MID TERM REVIEW

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Competition as an interaction between organisms

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Competition occurs when organisms vie for the same resource in an ecosystem. Example: Two species of birds competing for nesting sites.

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Element cycled through the ecosystem never as a gas

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Phosphorus is commonly cycled through the ecosystem but is never found as a gas.

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Purpose of the Taylor Grazing Act

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The Taylor Grazing Act was enacted to regulate grazing on public lands to improve rangeland conditions and stabilize the livestock industry.

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Define terrestrial

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Terrestrial refers to organisms that live on land rather than in water or air.

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Percent of terrestrial organisms relying on forests

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A significant percentage of terrestrial organisms rely on forests for sustainable living conditions, though the exact percentage may vary.

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Description of the tundra

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The tundra is a cold, treeless biome with low-growing vegetation, found in polar regions and at high altitudes.

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Location of the tundra

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The tundra is found in the Arctic and Antarctic regions, as well as on high mountain tops.

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Fragmentation of a habitat

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Fragmentation refers to the breaking up of a habitat into smaller, isolated patches, often due to human activities.

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Factors worsening habitat fragmentation

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Urban development, agriculture, and road construction are factors that worsen habitat fragmentation.

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Purpose of the Duck Stamp Act

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The Duck Stamp Act requires waterfowl hunters to purchase a stamp, with proceeds going to wetland conservation.