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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effects of ocean acidification on growth, pigment contents and antioxidant potential of the subtropical Atlantic red alga Hypnea pseudomusciformis Nauer, Cassano & MC Oliveira (Gigartinales) in laboratory

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Author(s):
Nauer, Fabio [1] ; Borburema, Henrique D. S. [2] ; Yokoya, Nair S. [1] ; Fujii, Mutue T. [1]
Total Authors: 4
Affiliation:
[1] Inst Bot Sao Paulo, Res Nucleus Phycol, 3687 Miguel Stefano Ave, BR-04301902 Sao Paulo, SP - Brazil
[2] Univ Fed Rio Grande do Norte, Dept Oceanog & Limnol, 1 Gov Silvio Pedroza Ave, BR-59014100 Natal, RN - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Rev. bras. Bot.; v. 44, n. 1, p. 69-77, MAR 2021.
Web of Science Citations: 0
Abstract

Marine ecosystems are subject to several modifications due to anthropogenic impacts, including ocean acidification caused by the absorption of excessive CO2 present in the atmosphere. Perspectives are for dramatic modifications in seawater pH and more than 60% of the ocean surface impacted over the next 100 years by global change. In this study, ocean acidification scenarios were simulated by CO2 enrichment into seawater in three pH levels (8.0, 7.6 and 7.2) using a bioreactor system in laboratory conditions. Experimental evaluation was performed with Hypnea pseudomusciformis Nauer, Cassano \& M.C. Oliveira due to its great importance in coastal marine ecosystems for primary production and commercial interest. Contrary to our initial hypothesis, the growth rate of H. pseudomusciformis decreased significantly with decreased pH conditions, even with increased availability of CO2. The maximum quantum yield and chlorophyll a content were also negatively affected by the pH reduction, while an increase in antioxidant activity was observed, indicating physiological stress. The physiological responses to decreased pH conditions reflect the importance of species-level studies and corroborate the changes caused by the ocean acidification on the macroalgal species. (AU)

FAPESP's process: 18/11445-7 - Elucidating the effects of global climate change on macroalgae: effects of marine heat waves on populations of Hypnea pseudomusciformis (Gigartinales, Rhodophyta)
Grantee:Fábio Nauer da Silva
Support Opportunities: Scholarships in Brazil - Post-Doctoral