TABLE 2.

Summary of photophysiological parameters describing the response of [3H]-leucine incorporation to irradiance at Station ALOHAa

Cruise and depth (m)αβleuDleuSleumaxEkR2 (P)
February 2002
    250.74 (0.33)0.00b (0.00)23 (2.8)43 (4.3)43580.62 (<0.0001)
    1001.2b (1.3)0.062 (0.014)12 (1.9)24 (3.8)22180.41 (0.0015)
March 2002
    250.13 (0.05)0.023b (0.041)28 (2.2)58 (6.0)463630.57 (<0.0001)
    1000.25 (0.11)0.049b (0.057)16 (1.7)34 (8.7)261060.54 (<0.0001)
May 2002
        50.36 (0.13)0.025b (0.024)32 (3.8)71 (10)621750.68 (≤0.0001)
    750.64 (0.31)0.19 (0.032)28 (5.8)92 (13)60940.54 (<0.0001)
  • a Values are regression-derived parameters; values in parentheses are standard errors. See the text for units.

  • b Not significantly different from zero, P > 0.05.