A carbon balance model for the great dismal swamp ecosystem

Table 4 Initial carbon stock types and carbon density values by forest type

Stock type	AWC	CG	MG	PP^a	Average
NPP^b	11.35	10.78	9.29	10.47	10.47
Live leaf	5.42	3.00	2.91	3.77	3.77
Live wood	103.87	169.52	94.62	122.67	122.67
Live root	5.46	4.46	3.68	4.53	4.53
Leaf litter	5.03	4.46	4.15	4.55	4.55
Dead wood	25.07	22.70	13.38	20.38	20.38
Dead root	2.54	2.07	1.71	2.11	2.11
Upper peat (0–40 cm)	358.40	358.40	358.40	358.40	358.40
Deep peat (41–100 cm)^c	537.60	537.60	537.60	537.60	537.60

Values for ‘Upper Peat’ and ‘Deep Peat’ are calculated with a standardized depth and soil chemistry characteristics (bulk density, organic matter and carbon content) that were measured on site. The model uses an initial peat depth of 100 cm for the entire swamp. Values are in tons carbon per hectare
AWC Atlantic white cedar; CG cypress-gum; MG maple-gum; PP pond pine
^aPond pine (PP) values are an average of Atlantic white cedar (AWC), cypress-gum (CG), and maple-gum (MG)
^bNPP (net primary productivity) represented as an annual gain (t C/ha⁻¹/year⁻¹)
^cDeep Peat was added as a passive carbon pool to allow the model to store carbon with long term carbon accumulation rates

ISSN: 1750-0680