New sampling for the study of the relationship between dichotomies and photosynthetic efficiency and composition in tidal gradients in Fucus vesiculosus: field experiment

CoastProtect

1 February 2026

On July 23rd, we headed to Testal Beach (Ría de Noia y Muros) to determine the chlorophyll fluorescence and spectral reflectance of Fucus vesiculosus specimens at different intertidal heights during tidal cycle desiccation. Finally, the samples were processed for trace element determination (PTEs) and FTIR analysis.

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    Marine ecosystems and the impact of heavy metal pollution (HM).

    Marine ecosystems, especially those in coastal areas, are particularly vulnerable to heavy metal (HM) pollution since they are subject to both land- and ocean-based pollution sources. Due to their toxicity, persistence, and capacity to biomagnify in the food chain, HMs pose an important threat through lethal and sub-lethal effects at the individual level that might have far-reaching consequences at higher hierarchical levels: populations, communities, and even entire ecosystems.

    The cascading effects of pollution can thus jeopardize ecosystems' integrity and undermine their resilience, especially when they impact species with critical ecosystem roles, like macroalgal foundation species.