Halimeda Jolyana (Bryopsidales, Chlorophyta) Presents Higher Vulnerability to Metal Pollution at Its Lower Temperature Limits of Distribution

Overview

Journal Environ Sci Pollut Res Int

Publisher Springer

Specialties Environmental Health
Toxicology

Date 2018 Feb 15

PMID 29442312

Authors

Fernando Scherner

Eduardo Bastos

Ticiane Rover

Eliana de Medeiros Oliveira

Rafael Almeida

Ana Gabriela Itokazu

Zenilda Laurita Bouzon

Leonardo Rubi Rorig

Sonia Maria Barreto Pereira

Paulo Antunes Horta

Affiliations

Soon will be listed here.

Abstract

Seaweeds living at their temperature limits of distribution are naturally exposed to physiological stressors, facing additional stress when exposed to coastal pollution. The physiological responses of seaweeds to environmental conditions combining natural and anthropogenic stressors provide important information on their vulnerability. We assessed the physiological effects and ultrastructural alterations of trace metals enrichment at concentrations observed in polluted regions within the temperature ranges of distribution of the endemic seaweed Halimeda jolyana, an important component of tropical southwestern Atlantic reefs. Biomass yield and photosynthetic performance declined substantially in samples exposed to metal, although photosynthesis recovered partially at the highest temperature when metal enrichment was ceased. Metal enrichment caused substantial ultrastructural alterations to chloroplasts regardless of temperatures. The lack of photosynthetic recovery at the lower temperatures indicates a higher vulnerability of the species at its temperature limits of distribution in the southwestern Atlantic.

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