Below is the default table used to define the minimum and maximum values for the pigment-to-chlorophyll-a ratios of each pigment-taxa pair. These values are used to constrain the gradient decent algorithm.
## Class Pig_Abbrev min max
## 1 Syn Zea 0.0800 2.500
## 2 Chlorophytes Neox 0.0300 0.230
## 3 Chlorophytes Viol 0.0110 0.470
## 4 Chlorophytes Lut 0.0900 0.280
## 5 Chlorophytes Zea 0.0020 0.099
## 6 Chlorophytes Chl_b 0.1800 0.930
## 7 Prasinophytes Neox 0.0180 0.150
## 8 Prasinophytes Pra 0.0600 0.880
## 9 Prasinophytes Viol 0.0080 0.150
## 10 Prasinophytes Lut 0.0010 0.180
## 11 Prasinophytes Zea 0.0150 0.350
## 12 Prasinophytes Chl_b 0.4400 1.030
## 13 Cryptophytes Allo 0.1600 0.790
## 14 Diatoms-1 Chl_c1 0.0030 0.057
## 15 Diatoms-1 Fuco 0.3000 1.700
## 16 Diatoms-2 Chl_c3 0.0460 0.270
## 17 Diatoms-2 Fuco 0.3300 1.230
## 18 Pelagophytes Chl_c3 0.1500 0.310
## 19 Pelagophytes X19but 0.2400 3.100
## 20 Pelagophytes Fuco 0.3100 1.370
## 21 Dinoflagellates-1 Per 0.2900 1.600
## 22 Haptophytes-1 Chl_c1 0.0200 0.072
## 23 Haptophytes-1 Fuco 0.2000 0.340
## 24 Haptophytes-6 Chl_c3 0.0500 0.300
## 25 Haptophytes-6 X19but 0.0010 0.190
## 26 Haptophytes-6 ChlcMGDG18 0.0090 0.300
## 27 Haptophytes-6 ChlcMGDG14 0.0090 0.300
## 28 Haptophytes-6 X19hex 0.0300 1.500
## 29 Haptophytes-8 Chl_c3 0.0210 0.550
## 30 Haptophytes-8 X19but 0.0001 0.980
## 31 Haptophytes-8 Fuco 0.0110 2.150
## 32 Haptophytes-8 X19hex 0.0001 1.400
## 33 Haptophytes Chl_c3 0.0210 0.550
## 34 Haptophytes X19but 0.0001 0.980
## 35 Haptophytes Fuco 0.0110 2.150
## 36 Haptophytes X19hex 0.0001 1.400
## 37 Haptophytes ChlcMGDG18 0.0090 0.300
## 38 Haptophytes ChlcMGDG14 0.0090 0.300
## 39 Pro Zea 0.0500 1.200
## 40 Syn Tchla 1.0000 1.000
## 41 Chlorophytes Tchla 1.0000 1.000
## 42 Prasinophytes Tchla 1.0000 1.000
## 43 Cryptophytes Tchla 1.0000 1.000
## 44 Diatoms-1 Tchla 1.0000 1.000
## 45 Diatoms-2 Tchla 1.0000 1.000
## 46 Pelagophytes Tchla 1.0000 1.000
## 47 Dinoflagellates-1 Tchla 1.0000 1.000
## 48 Dinoflagellates-2 Tchla 1.0000 1.000
## 49 Haptophytes-1 Tchla 1.0000 1.000
## 50 Haptophytes-6 Tchla 1.0000 1.000
## 51 Haptophytes Tchla 1.0000 1.000
## 52 Haptophytes-8 Tchla 1.0000 1.000
## 53 Pro Dvchla 1.0000 1.000These values are derived from the following paper among other sources:
Mackey, M. D., Mackey, D. J., Higgins, H. W., & Wright, S. W. (1996). CHEMTAX—a program for estimating class abundances from chemical markers: application to HPLC measurements of phytoplankton. Marine Ecology Progress Series, 144(1/3), 265–283. http://www.jstor.org/stable/24857270