carbon

Question 1

sources of carbon?

Answer 1

Methane (CH4), Environmental Reservoirs include Rocks, Atmosphere, Oceans

Question 2

what are the major categories of carbon?

Answer 2

Inorganic – CO2 (carbon dioxide), H2CO3 (carbonic acid), HCO3- (bicarbonate ion), and CO3-2 (carbonate ion). Dissolved (DIC) or
particulate ) –Limestone/Dolomite rock, also coal and shale.
Organic – all living and dead organisms, fecal matter etc. and dissolved organic carbon.
* May be Particulate Organic Matter (POM)
* often vastly more dead organic matter than living.
* may be thousands of organic substances
* Origin of aquatic OM = catchment soils, wetland habitats and PS

Question 3

Detritus

Answer 3

dead organic matter

Question 4

Allochthonous source

Answer 4

brought in from outside of the system

Question 5

autochthonous sources of DOM

Answer 5

in
situ production by algae and plants and the direct consumption
of these internal primary producers by herbivores - the grazing
pathway

Question 6

How does inorganic carbon enter water

Answer 6

Respiration
* Presence in incoming water (precipitation, erosion, volcanic activity)
* Absorbed from the atmosphere