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 1.2123
## 2 Chlorophytes Neox 0.0091 0.1085
## 3 Chlorophytes Viol 0.0150 0.5875
## 4 Chlorophytes Lut 0.1071 0.2295
## 5 Chlorophytes Zea 0.0063 0.0722
## 6 Chlorophytes Chl_b 0.1666 0.9254
## 7 Prasinophytes Neox 0.0268 0.1026
## 8 Prasinophytes Pra 0.0642 0.4369
## 9 Prasinophytes Viol 0.0087 0.0996
## 10 Prasinophytes Lut 0.0250 0.0669
## 11 Prasinophytes Zea 0.0151 0.1396
## 12 Prasinophytes Chl_b 0.4993 0.9072
## 13 Cryptophytes Allo 0.2118 0.5479
## 14 Diatoms-1 Chl_c1 0.0021 0.0452
## 15 Diatoms-1 Fuco 0.3315 0.9332
## 16 Diatoms-2 Chl_c3 0.0189 0.1840
## 17 Diatoms-2 Fuco 0.3315 0.9332
## 18 Pelagophytes Chl_c3 0.1471 0.2967
## 19 Pelagophytes X19but 0.2457 1.4339
## 20 Pelagophytes Fuco 0.3092 1.2366
## 21 Dinoflagellates-1 Per 0.3421 0.8650
## 22 Haptophytes Chl_c3 0.0500 0.3500
## 23 Haptophytes X19but 0.0819 0.2872
## 24 Haptophytes ChlcMGDG18 0.0090 0.3000
## 25 Haptophytes ChlcMGDG14 0.0090 0.3000
## 26 Haptophytes X19hex 0.2107 1.3766
## 27 Pro Zea 0.0800 1.2123
## 28 Haptophytes Fuco 0.0090 0.4689
## 29 Haptophytes Tchla 1.0000 1.0000
## 30 Diatoms-2 Tchla 1.0000 1.0000
## 31 Diatoms-1 Tchla 1.0000 1.0000
## 32 Cryptophytes Tchla 1.0000 1.0000
## 33 Prasinophytes Tchla 1.0000 1.0000
## 34 Chlorophytes Tchla 1.0000 1.0000
## 35 Syn Tchla 1.0000 1.0000
## 36 Dinoflagellates-1 Tchla 1.0000 1.0000
## 37 Dinoflagellates-2 Tchla 1.0000 1.0000
## 38 Pelagophytes Tchla 1.0000 1.0000
## 39 Pro Dvchla 1.0000 1.0000These 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