Question

industrial logging threatens many forested ecosystems. which of the following environmental consequences will most likely result from clear - cutting deciduous forests for logging?
a more carbon dioxide will be added to the atmosphere and increase anthropogenic climate change.
b farmers will be able to utilize more land, resulting in a decrease in the number of floods.
c less oxygen will be used by the trees, so more oxygen will be in the atmosphere for humans and other animals to use.
d the regulating services of the area, such as nutrient cycling and water regulation, would increase with fewer trees in the landscape.

Explanation:

• Option A: Trees absorb \(CO_2\) during photosynthesis. Clear - cutting reduces the number of trees that can sequester \(CO_2\). Logged trees may also decompose (releasing \(CO_2\)) or be burned (also releasing \(CO_2\)). More \(CO_2\) in the atmosphere (a greenhouse gas) contributes to anthropogenic climate change.
• Option B: Trees help with water absorption and soil stability. Removing them (clear - cutting) can lead to increased runoff and more floods, not fewer.
• Option C: While trees do consume some oxygen in respiration, their main role in the oxygen - carbon cycle is to produce oxygen through photosynthesis. Removing trees (clear - cutting) reduces the net oxygen production (since the number of photosynthesizing trees is decreased), not increase the available oxygen for humans and animals.
• Option D: Trees play a crucial role in nutrient cycling (e.g., through leaf litter decomposition) and water regulation (e.g., through transpiration and root water uptake). Fewer trees would decrease, not increase, these regulating services.

Answer:

A. More carbon dioxide will be added to the atmosphere and increase anthropogenic climate change.