Chlorophylls and Phycoerythrins as Markers of Environmental Forcings Including Cyclone Erica Effect (March 2003) on Phytoplankton in the Southwest Lagoon of New Caledonia and Oceanic Adjacent Area

Table 5

Multiregression between chl a and photosynthetic accessory pigments for data of the time series at N12 and M33: chlorophyll b (chl b), chlorophyll 𝑐₁+𝑐₂ (chl 𝑐₁+𝑐₂), and phycoerythrin (PE). 𝐾₁, 𝐾₂, 𝐾₃ represent the partial regression coefficients and 𝐾₄ residual chl a when accessory pigments are null. The inverse of 𝐾₁, 𝐾₂, 𝐾₃ represent the mean estimate of the different pigments/chl a ratios. C_𝑥 = mean estimates of pigment ratio for chlorophytes (x = 1), chromophytes (x = 2), and cyanobacteria (x = 3).

N12 (𝑛=27)	Residual chl 𝐚	chl 𝑏	chl 𝑐1 + 𝑐2	PE
Mean coeff. (± SD)	K4 = 1.38 (± 0.55)	K1 = 1.43 (± 0.60)	K2 = 5.11 (± 0.24)	K3 = 0.086 (± 0.032)
𝑃	.019	.026	.000	.014
R^2 = 96.1%
Cx (1/mean coeff)		1/K1 = 0.55	1/K2 = 0.19	1/K3 = 15.4
Cx + SD		0.41	0.18	10.2
Cx – SD		0.83	0.20	31.2
M33 (𝑛=27)	Residual chl 𝑎	chl 𝑏	chl 𝑐1 + 𝑐2	PE
Mean coeff. (± SD)	K4 = 0.63 (± 0.17)	K1 = 1.62 (± 0.30)	K2 = 4.87 (± 0.55)	K3 = 0.069 (± 0.011)
𝑃	.002	.000	.000	.000
R^2 = 97.4%
Cx (1/mean coeff)		1/K1 = 0.61	1/K2 = 0.20	1/K3 = 14.3
Cx + SD		0.51	0.18	12.3
Cx – SD		0.75	0.23	17.2