Question

in a wetland, the biomass below the ground can be more productive than the biomass above ground.
which statement best describes why wetlands are some of the most productive ecosystems in the world?
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a wetlands have flat elevation and abundant sunlight.
b wetlands have an abundance of water available to help decomposers break down dead organic material.
c matter and energy are cycled through the wetland ecosystem by both aerobic and anaerobic cellular respiration.
d large amounts of carbon are cycled in the soil of the wetland ecosystem by aerobic organisms.

Explanation:

To determine why wetlands are productive ecosystems, we analyze each option:

• Option A: Flat elevation and sunlight are not unique to wetlands or the main reason for their high productivity.
• Option B: While water helps decomposers, the key to wetland productivity involves both aerobic and anaerobic processes for nutrient cycling, not just decomposition.
• Option C: Wetlands have both aerobic (in oxygen - rich areas) and anaerobic (in water - logged, oxygen - poor areas) conditions. Matter and energy cycling through both aerobic and anaerobic cellular respiration allows efficient nutrient reuse and energy flow, supporting high productivity.
• Option D: Wetland soils often have anaerobic conditions, so aerobic organisms don't dominate carbon cycling here.

Answer:

C. Matter and energy are cycled through the wetland ecosystem by both aerobic and anaerobic cellular respiration.