Explain how natural regions can change in size or shape over time in response to environmental changes
Humans can modify the aspects of regions by, for example, shifting species abundance or altering habitats. A changing climate can also alter the spatial pattern of key conditions, so that shifts in ecosystem boundaries occur.
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Which of the following would most likely have the greatest impact on a large ecosystem?
A) loss of several keystone species from the ecosystem. B) construction of a two-lane gravel road through the middle of the ecosystem. C) construction of a lodge and trails to permit better access for ecotourists. D) allow the ecosystem to burn on a natural cycle.
Along with the global trend in urbanization is the correlated trend in
A) providing universal health care in megacities of developing nations. B) declining global human population. C) reforestation. D) overconsumption of resources.
How many kilograms (kg) are there in 1 milligram (mg)?
A) 1 x 10^-12 B) 1 x 10^-6 C) 1 x 10^6 D) 1 x 10^12
The mountain pine beetle has been responsible for all but ________
A) more crown fires in trees B) the deaths of large amounts of trees C) increased runoff and flash floods D) increased numbers of trees falling onto roads E) increased nitrogen fixation in soil