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. Author manuscript; available in PMC: 2022 Aug 1.
Published in final edited form as: Harmful Algae. 2021 Jul 23;108:102080. doi: 10.1016/j.hal.2021.102080

Table 2.

Pearson correlation coefficient (r) matrix among metrics used to estimate cyanobacterial biomass during the 9 August 2018 and 7 August 2019 HABs Grab and the range of values observed. Strong (r = 0.71 to 0.90) and very strong (r > 0.90) correlations between two parameters are bolded. “NS” = not significant correlation (P > 0.05). ND = no data was recorded.

Year Chl RFU PC RFU Cyano. Chla Total chla Chl a PC 16S mcyE Total MCs Exc. MCs Range of values*
Chlorophyll RFU - YSI 2018 1 .85 .51 .75 .54 ND ND NS NS − 0.21 0.30 – 3.67
2019 1 .66 .65 .68 .70 .43 .66 .63 .71 .43 0.05 – 3.85
Phycocyanin RFU - YSI 2018 .85 1 .57 .76 .61 ND ND NS NS − 0.35 − 0.06 – 2.90
2019 .66 1 .77 .78 .74 .55 .62 .65 .78 .48 0.00 – 21.13
Cyanobacteria chlorophyll a μg/L - FluoroProbe 2018 .51 .57 1 .86 .94 ND ND NS .73 NS 0.28 – 11.15
2019 .65 .77 1 .99 .98 .54 .92 .80 .90 .60 0.43 – 110.40
Total chlorophyll a μg/L - FluoroProbe 2018 .75 .76 .86 1 .90 ND ND NS .48 NS 2.82 – 20.99
2019 .68 .78 .99 1 .98 .53 .92 .79 .90 .58 3.08 – 132.63
Chlorophyll a μg/L - filter extracted 2018 .54 .61 .94 .90 1 ND ND NS .72 NS 3.50 – 31.76
2019 .70 .74 .98 .98 1 .51 .95 .83 .92 .60 1.88 – 196.16
Phycocyanin μg/L - filter extracted 2018 ND ND ND ND ND ND ND ND ND ND No data
2019 .43 .55 .54 .53 .51 1 .49 .55 .52 .42 0 – 18.22
Cyanobacteria 16S gene copies/L - qPCR 2018 ND ND ND ND ND ND ND ND ND ND No data
2019 .66 .62 .92 .92 .95 .49 1 .97 .89 .89 3.3 × 107 – 7.5 × 108
Cyanobacteria mcyE gene copies/L - qPCR 2018 NS NS NS NS NS ND ND 1 .40 .50 0 – 4.7 × 108
2019 .63 .65 .80 .79 .83 .55 .97 1 .83 .55 3.1 × 104 – 2.8 × 107
Total Microcystins μg/L - ELISA 2018 NS NS .73 .48 .72 ND ND .40 1 .24 <0.1 – 6.38
2019 .71 .78 .90 .90 .92 .52 .89 .83 1 .62 <0.1 – 46.56
Extracellular Microcystins μg/L- ELISA 2018 − 0.21 − 0.35 NS NS NS ND ND .50 .24 1 <0.1 – 0.75
2019 .43 .48 .60 .58 .60 .42 .89 .55 .62 1 <0.1 – 1.38
*

One 2018 outlier sample was removed from the correlation that had chl values approximately 2 to 3 times greater than the highest sample reported in the last column.