Analysis of spectral and photosynthetic response variations of Cystoseira spp. exposed to Chromium

This study explores the physiological and spectral responses of different species belonging the genus Cystoseira to varying concentrations of chromium (Cr) in controlled experimental conditions. The research highlights the potential of Cystoseira spp. as a bioindicator for monitoring heavy metal pollution in marine ecosystems. Experiments were conducted in tanks with increasing chromium concentrations (0, 0.1, 1, and 10 µmol l⁻¹), analyzing changes in reflectance, photosynthetic efficiency, and pigment composition over 14 days. Results showed dose-and time-dependent effects, with higher chromium levels causing significant photosynthetic inhibition, oxidative stress, and chlorophyll degradation. Spectral analyses identified key wavelengths (550 nm and 710 nm) correlating with chromium-induced stress, supporting their use in remote sensing for environmental monitoring. The study underscores the importance of integrating field validation and remote sensing for large-scale monitoring of marine ecosystems impacted by heavy metal contamination. These findings contribute to conservation strategies and the development of innovative tools for assessing the ecological quality of coastal waters.