Macroalgae metal-biomonitoring in Antarctica: Addressing the consequences of human presence in the white continent
| Autor: | Patricia Verónica López Díaz, Fabiola Moenne, Audran Chenu, María José Díaz, María Jesús Abello-Flores, Paulina Bruning, Paula S.M. Celis-Plá, Fernanda Rodríguez-Rojas, M. Gabriela Lobos, Claudio A. Sáez, Ignacio Garrido, Marcelo Verdugo, Céline Lavergne |
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| Přispěvatelé: | Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada |
| Rok vydání: | 2022 |
| Předmět: |
0106 biological sciences
Chlorophyll a Ecophysiology Health Toxicology and Mutagenesis Antarctic Regions Intertidal zone Intertidal Chlorophyta Toxicology 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Contamination Algae Anthropocene Biomonitoring Humans Subtidal Zoología Marine ecosystem Ecosystem 14. Life underwater 030304 developmental biology 0303 health sciences biology Ecology Chlorophyll A General Medicine 15. Life on land Seaweed biology.organism_classification Pollution chemistry 13. Climate action Monostroma Environmental science Water Pollutants Chemical Biological Monitoring Environmental Monitoring 010606 plant biology & botany |
| Zdroj: | Environmental Pollution. 292:118365 |
| ISSN: | 0269-7491 |
| Popis: | Marine ecosystems in the Arctic and Antarctica were once thought pristine and away from important human influence. Today, it is known that global processes as atmospheric transport, local activities related with scientific research bases, military and touristic maritime traffic, among others, are a potential source of pollutants. Macroalgae have been recognized as reliable metal-biomonitoring organisms due to their accumulation capacity and physiological responses. Metal accumulation (Al, Cd, Cu, Fe, Pb, Zn, Se, and Hg) and photosynthetic parameters (associated with in vivo chlorophyll a fluorescence) were assessed in 77 samples from 13 different macroalgal species (Phaeophyta; Chlorophyta; Rhodophyta) from areas with high human influence, nearby research and sometimes military bases and a control area, King George Island, Antarctic Peninsula. Most metals in macroalgae followed a pattern influenced by rather algal lineage than site, with green seaweeds displaying trends of higher levels of metals as Al, Cu, Cr and Fe. Photosynthesis was also not affected by site, showing healthy organisms, especially in brown macroalgae, likely due to their great dimensions and morphological complexity. Finally, data did not demonstrate a relationship between metal accumulation and photosynthetic performance, evidencing low anthropogenic-derived impacts associated with metal excess in the area. Green macroalgae, especially Monostroma hariotti, are highlighted as reliable for further metal biomonitoring assessments. In the most ambitious to date seaweed biomonitoring effort conducted towards the Austral pole, this study improved by 91% the overall knowledge on metal accumulation in macroalgae from Antarctica, being the first report in species as Sarcopeltis antarctica and Plocamium cartilagineum. These findings may suggest that human short- and long-range metal influence on Antarctic coastal ecosystems still remains under control. This work and logistic support were granted by the projects INACH (Chilean Antarctic Institute) RT_09_16, RG_10_18, FP_07–18 directed by C.A. Sáez, P.S.M. Celis-Plá and C. Lavergne, respectively. C. Lavergne was funded by the Chilean grant ANID Fondecyt #11201072 and F. Rodríguez-Rojas was funded by the Chilean grant ANID Fondecyt #3180394. |
| Databáze: | OpenAIRE |
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