Mean (±SD) water quality parameters (mg L−1) for sites on the north coast of Tobago: total suspended solids [44], phosphate, nitrate, ammonia and nitrite.

Fore-reef sites sampled at a depth of 10 m in March, June, August and November, 2007 (n = 4). Unpublished data provided by IWCAM [43]. Methods used include: gravimetric determination for TSS - United States Environmental Protection Agency SMEWW 2540 d; phosphate – Hach 8048, nitrate – Hach 8192; ammonia- Hach 8038; nitrite – Hach 8507. Detection limits (mg L−1) were: TSS 1.0; phosphate, ammonia and nitrate 0.01; nitrite 0.001. Note: water quality between sites was not significantly different (p>0.05).