AP BIOLOGY

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ECOLOGY

HUMANS AND THE BIOSPHERE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The Waccamaw Drainage System is a system of interrelated coastal wetlands in southeastern North Carolina. Land-use modification and human population growth threaten these wetlands in a variety of ways. Scientific experts have recommended a number of management practices to protect the Waccamaw Drainage System. Which one of these recommendations would reduce stream bank erosion?
A
encourage no-till agriculture near waterways
B
remove downed trees from river channels
C
dredge certain segments of the river
D
plant shoreline buffer zones
Explanation: 

Detailed explanation-1: -Invasive plants can impact forest ecosystems and biodiversity in a variety of ways: Reduce forest health and timber productivity. Invasive plant competition, introduced diseases, and insect infestations in forestland can cause increased seedling mortality or cause problems with natural regeneration of forests.

Detailed explanation-2: -Why is it difficult to create a terrarium ecosystem that will last a long time without human help? Terrarium ecosystems cannot get enough sunlight. Terrarium ecosystems cannot get enough oxygen. Ecosystems with few species are weak and unstable.

Detailed explanation-3: -What is the MOST likely effect these catfish could have on the ecology of the Yadkin River? They could reduce native fish populations.

Detailed explanation-4: -What is the MOST likely reason for the slowing increase in storage? The number of available sites for new hydroelectric plants decreased, so fewer new reservoirs were made. Just under half the oil that enters ocean water comes from natural oil seeps on the ocean floor.

There is 1 question to complete.
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