Will temperature and salinity changes exacerbate the effects of seawater acidification on the marine microalga Phaeodactylum tricornutum?

Autor(es)

Bautista-Chamizo, Esther ^[1] ; Sendra, Marta ^[2] ; Cid, Angeles ^[3] ; Seoane, Marta ^[3] ; de Orte, Manoela Romano ^{[4, 5]} ; Riba, Inmaculada ^[1]

Afiliação do(s) autor(es)

^[1] Univ Cadiz, Dept Quim Fis, Fac Ciencias Mar & Ambientales, Cadiz - Spain

^[2] Inst Ciencias Marinas Andalucia CSIC, Dept Ecol & Gest Costera, Cadiz - Spain

^[3] Univ A Coruna, Fac Ciencias, Dept Biol, La Coruna - Spain

^[4] Univ Fed Sao Paulo, Dept Ciencias Mar, Campus Baixada Santista, Sao Paulo - Brazil

^[5] Carnegie Inst Sci, Dept Global Ecol, Stanford, CA - USA

• Tipo de documento: Artigo Científico
• Fonte: Science of The Total Environment; v. 634, p. 87-94, SEP 1 2018.
• Citações Web of Science: 4

Resumo

To evaluate the effects related to the combination of potential future changes in pH, temperature and salinity on microalgae, a laboratory experiment was performed using the marine diatom Phaeodactylum tricornutum. Populations of this species were exposed during 48 h to a three-factor experimental design (3 x 2 x 2) with two artificial pH values (6, 7.4), two levels of temperature (23 degrees C, 28 degrees C), two levels of salinity (34 psu, 40 psu) and a control (pH 8, Temp 23 degrees C, Sal 34 psu). The effects on growth, cell viability, metabolic activity, and inherent cell properties (size, complexity and autofluorescence) of P. tricornutum were studied using flow cytometry. The results showed adverse effects on cultures exposed to pH 6 and high temperature and salinity, being the inherent cell properties themost sensitive response. Also, linked effects of these parameters resulted on cell viability and cell size decrease and an increase of cell autofluorescence. The conclusions obtained from this work are useful to address the potential effects of climate change (in terms of changes on pH, salinity and temperature) in microalgae. (C) 2018 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 17/06686-2 - Avaliação dos efeitos da adaptação local à acidificação oceânica em mexilhões na presença de outro estressor
• Beneficiário: Manoela Romanó de Orte
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado