Organic Matter Source	Altamaha R.	Chesapeake Bay	Columbia R.	Duplin R.	Graveline Marsh	Horn Island	Plum Island Sound	Ria Formosa	Sippewisset Marsh	Childs R.
Phytoplankton	11000000000	3200000000000	43000000000	470000000	280000000	820000000000	2900000000	3000000000	15000000	74000000
Microalgae	500000000	0	1500000000	2100000000	270000000	71000000000	5300000000	0	10000000	0
Macroalgae	0	0	0	0	0	0	0	0	0	210000000
Salt Marsh	5500000000	40000000000	0	7600000000	5100000000	140000000000	15000000000	16000000000	67000000000	1700000
Fresh Marsh	2300000000	0	11000000000	0	0	0	0	0	0	0
Tidal Forest	15000000000	0	0	0	0	430000000000	0	0	0	0
Sea Grass	0	50000000000	0	0	0	6200000000	0	2600000000	0	0
Terrestrial	130000000000	150000000000	210000000000	trace	11000000	0	2400000000	0	29000000	ND

CARBON ECONOMY										
Macrophytes										
   Marsh	14	1.2	4	74	90	10	59	70	55	1
   Sea Grass		1.5				<1		11		
   Swamp						29				

Algae										
   Phytoplankton	6	93	16	5	4.9	56	11	13	13	26
   Epibenthic	<1		1	20	4.8	4.6	21		8	
   Macroalgae								6		73

Watershed										
   Terrestrial	79	4.3	79	1	0.3		9		24	

NITROGEN ECONOMY										
Macrophytes										
   Marsh	5	0.2	1	29	42.4	2	19	32.9	12	
   Sea Grass		0.2				<1		5.3		
   Swamp						6				

Algae										
   Phytoplankton	18	97.7	20	13	16.5	85	26	43.3	28	26
   Epibenthic	<1		1	57	41	7	48		20	
   Macroalgae								18.4		74

Watershed										
   Terrestrial	76	1.9	78	1	0.1		7	0.1	40