Removal Of Carbon From Wetlands

Question 0

In anaerobic soils, methane produced by methangeneous diffuses

Answer 0

Upwards to the surface and can be release by diffusion from either saturated or unsaturated sediments.

Question 1

Most CO2 diffuses from the

Answer 1

Soil solution to the atmosphere.

Question 2

In vascular wetland plants, diffusion through the soil can be

Answer 2

Bypassed as the roots and stems provide a shortcut for CH4 and CO2 to pass directly to the atmosphere.

Question 3

Where soil is in contact with oxygen, methane may be re oxidised to CO2 by

Answer 3

Methanotropic (methane consuming) bacteria, which can only thrive in the presence of oxygen.

Question 4

DIC may be leached as water reaches the surface in streamflow or a lake, the DIC may be

Answer 4

Released back to the atmosphere as CO2. Some may remain dissolved, available for PS by aquatic vegetation.

Question 5

DOC can be leached from the wetland into

Answer 5

Runoff water and into aquatic ecosystems downstream.

Question 6

Carbon may be lost as POC through erosion or surface flow as

Answer 6

Sediment is washed away from floodplain wetlands during floods.