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Table 4 Correlation coefficient values (r) between seawater physicochemical parameters and the biochemical compositions of the studied calcareous species*

From: Morpho-anatomical, and chemical characterization of some calcareous Mediterranean red algae species

Species parameters

Temperature

Salinity

PH

DO

NO3

NO2

NH4

PO4

Abundance

0.049

− 0.037

0.469

0.427

− 0.526

− 0.348

0.718

− 0.486

Carbohydrates

0.054

 − 0.155

0.135

0.022

0.110

 − 0.294

 − 0.331

 − 0.072

Lipids

0.272

 − 0.543

0.062

 − 0.070

 − 0.461

 − 0.556

0.121

 − 0.540

Proteins

0.182

 − 0.097

 − 0.237

 − 0.222

 − 0.158

 − 0.008

0.058

 − 0.113

Chlorophyll a

 − 0.177

0.115

0.192

0.255

 − 0.068

0.152

0.456

0.040

Total chlorophyll

 − 0.250

0.174

0.454

0.437

 − 0.054

0.213

0.457

0.082

Carotenoids

 − 0.604

0.466

0.554

0.618

0.456

0.427

0.080

0.465

PC

 − 0.455

0.522

0.021

0.239

0.087

0.673

0.502

0.411

APC

 − 0.083

0.544

 − 0.374

 − 0.179

 − 0.043

0.572

0.389

0.244

PE

 

 − 0.232

0.456

 − 0.210

 − 0.008

0.055

0.624

0.452

0.438

  1. *Bold values are significantly correlation at P < 0.05 level