Note
Turtle grass (Thalassia testudinum) was exposed to either Control (6 weeks of unscreened irradiance), Long Period (3 weeks of screened [8% of unscreened] followed by 3weeks of unscreened irradiance), or Short Period (alternating 7-day periods of 8% and 100% unscreened irradiance for a total of 6 weeks) treatment. Six-week experiments were conducted during late winter (February–March) and summer (May–July), and indices of carbon (C) and nitrogen (N) metabolism and growth were monitored.