Resilience of the macroalgae Gongolaria barbata under ocean acidification: physiological responses and restoration perspective.
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| Natura: | Artículo científico |
| Lingua: | en |
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Marine environmental research
2026
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| author | D'Aniello, Ilaria Nardiello, Maria Arena, Carmen Badocco, Denis Barausse, Alberto Colletti, Alberto Danovaro, Roberto Fabbrizzi, Erika Formentin, Marta Fraschetti, Simonetta Giomi, Folco Matozzo, Valerio Moro, Isabella Petrosillo, Katiuscia Silvestrini, Chiara Vitale, Ermenegilda Munari, Marco |
| author_facet | D'Aniello, Ilaria Nardiello, Maria Arena, Carmen Badocco, Denis Barausse, Alberto Colletti, Alberto Danovaro, Roberto Fabbrizzi, Erika Formentin, Marta Fraschetti, Simonetta Giomi, Folco Matozzo, Valerio Moro, Isabella Petrosillo, Katiuscia Silvestrini, Chiara Vitale, Ermenegilda Munari, Marco D'Aniello, Ilaria Nardiello, Maria Arena, Carmen Badocco, Denis Barausse, Alberto Colletti, Alberto Danovaro, Roberto Fabbrizzi, Erika Formentin, Marta Fraschetti, Simonetta Giomi, Folco Matozzo, Valerio Moro, Isabella Petrosillo, Katiuscia Silvestrini, Chiara Vitale, Ermenegilda Munari, Marco |
| collection | PubMed - marine biology |
| contents | Resilience of the macroalgae Gongolaria barbata under ocean acidification: physiological responses and restoration perspective. D'Aniello, Ilaria Nardiello, Maria Arena, Carmen Badocco, Denis Barausse, Alberto Colletti, Alberto Danovaro, Roberto Fabbrizzi, Erika Formentin, Marta Fraschetti, Simonetta Giomi, Folco Matozzo, Valerio Moro, Isabella Petrosillo, Katiuscia Silvestrini, Chiara Vitale, Ermenegilda Munari, Marco Ocean Acidification Seaweed Seawater Phaeophyceae Climate Change Hydrogen-Ion Concentration The increasing CO concentration is a major cause of the climate change phenomenon. Concurrently, the same increase is leading to ocean acidification (OA), which is projected to decrease seawater pH by 0.4 units by 2100. Here we investigated the potential impacts of OA on the canopy-forming brown macroalga Gongolaria barbata from the Venice Lagoon. One-year-old individuals were maintained in mesocosms under two pH levels: 8.1 (current ambient value) and 7.7 (the end-of-the-century value predicted under the current scenario of anthropogenic CO emissions). The physiological responses of the algae were assessed during the experiment in terms of oxygen production and consumption, and maximal PSII photochemical efficiency. At the end of the experiment, we analyzed the percentage of mature receptacles, algal growth rate and the total polyphenolic content and antioxidant capacity as indicators of the stress response. The significant decrease in polyphenolic content indicates the impairment of the defence mechanisms, which could make the algae more vulnerable to grazing under acidified conditions. Yet, conversely, our results suggest that changes in pH levels do not significantly affect the physiological processes, growth or fertility of the algae. These findings suggest that while OA may weaken defence mechanisms, the preservation of physiological and reproductive functions would still support the potential of G. barbata populations from the Venice Lagoon to act as donor sources for restoration efforts, highlighting their resistance to the acidified conditions expected in the future. |
| format | Artículo científico |
| id | pubmed_41619343 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Marine environmental research |
| record_format | pubmed |
| spellingShingle | Resilience of the macroalgae Gongolaria barbata under ocean acidification: physiological responses and restoration perspective. D'Aniello, Ilaria Nardiello, Maria Arena, Carmen Badocco, Denis Barausse, Alberto Colletti, Alberto Danovaro, Roberto Fabbrizzi, Erika Formentin, Marta Fraschetti, Simonetta Giomi, Folco Matozzo, Valerio Moro, Isabella Petrosillo, Katiuscia Silvestrini, Chiara Vitale, Ermenegilda Munari, Marco Ocean Acidification Seaweed Seawater Phaeophyceae Climate Change Hydrogen-Ion Concentration Resilience of the macroalgae Gongolaria barbata under ocean acidification: physiological responses and restoration perspective. D'Aniello, Ilaria Nardiello, Maria Arena, Carmen Badocco, Denis Barausse, Alberto Colletti, Alberto Danovaro, Roberto Fabbrizzi, Erika Formentin, Marta Fraschetti, Simonetta Giomi, Folco Matozzo, Valerio Moro, Isabella Petrosillo, Katiuscia Silvestrini, Chiara Vitale, Ermenegilda Munari, Marco Ocean Acidification Seaweed Seawater Phaeophyceae Climate Change Hydrogen-Ion Concentration The increasing CO concentration is a major cause of the climate change phenomenon. Concurrently, the same increase is leading to ocean acidification (OA), which is projected to decrease seawater pH by 0.4 units by 2100. Here we investigated the potential impacts of OA on the canopy-forming brown macroalga Gongolaria barbata from the Venice Lagoon. One-year-old individuals were maintained in mesocosms under two pH levels: 8.1 (current ambient value) and 7.7 (the end-of-the-century value predicted under the current scenario of anthropogenic CO emissions). The physiological responses of the algae were assessed during the experiment in terms of oxygen production and consumption, and maximal PSII photochemical efficiency. At the end of the experiment, we analyzed the percentage of mature receptacles, algal growth rate and the total polyphenolic content and antioxidant capacity as indicators of the stress response. The significant decrease in polyphenolic content indicates the impairment of the defence mechanisms, which could make the algae more vulnerable to grazing under acidified conditions. Yet, conversely, our results suggest that changes in pH levels do not significantly affect the physiological processes, growth or fertility of the algae. These findings suggest that while OA may weaken defence mechanisms, the preservation of physiological and reproductive functions would still support the potential of G. barbata populations from the Venice Lagoon to act as donor sources for restoration efforts, highlighting their resistance to the acidified conditions expected in the future. |
| title | Resilience of the macroalgae Gongolaria barbata under ocean acidification: physiological responses and restoration perspective. |
| topic | Ocean Acidification Seaweed Seawater Phaeophyceae Climate Change Hydrogen-Ion Concentration |
| url | https://pubmed.ncbi.nlm.nih.gov/41619343/ |