Table 1.

Concentrations of dissolved amino acids measured in lakes, estuaries, and oceans.

Location	Amino acid concentration (nM)	Notes
Oceana	0.1–50	Individual amino acids
Coastal Ocean (New York Bight)b	1–15	Individual amino acids
Estuary (North Carolina)c	300–500	12 amino acids
Productive lakesd	78–277e	Total for five sampling days

^aWilliams (2000).

^bFuhrman and Ferguson (1986).

^cCrawford et al. (1974).

^dJørgensen (1987).

^e1200 and 1500 nM found once.