Wetland Biogeochemistry

Question 1

What’s biogeochemistry

Answer 1

Biogeochemistry of wetlands is the biological, geological, physical, and chemical processes that affect these critical habitats

Question 2

What does the natural pH of water body depend on?

Answer 2

The catchment geology
Surrounding vegetation

Question 3

What aquatic system’s are acid sensitive

Answer 3

Systems in hard rock areas (granite)
Increase in acidity in a freshwater areas can negatively affect the biota.

Question 4

What pH are biota sensitive at

Answer 4

Fish most sensitive- pH < 4.5
Macroinvertebrates - pH 6 for Gammerus and Ephemeroptera

Question 5

Why is presence or absence of oxygen in water important

Answer 5

As it determines whether and what type of organisms can live in the aquatic system.
Temperature is the principal factor that affects the solubility of DO.
Temperature increase can account for 50% loss in DO in spring and summer

Question 6

What’s oxygen saturation

Answer 6

Is the amount of DO water can hold in equilibrium with the atmosphere at a particular water temp, atmospheric pressure, and altitude.

Question 7

What’s super and sub saturation

Answer 7

Super-saturation: (>120%) indicates high levels
Sub-saturation: (<80%) indicates natural R
After leave fall in autumn.