Article
Fisheries
Ellie R. Paine, Damon Britton, Matthias Schmid, Elizabeth A. Brewer, Guillermo Diaz-Pulido, Philip W. Boyd, Catriona L. Hurd
Summary: This study compared the physiological responses of three seaweed species to ocean acidification and found that elevated CO2 concentrations did not benefit their growth and photosynthesis in a future ocean.
ICES JOURNAL OF MARINE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Rebecca K. James, Christopher D. Hepburn, Daniel Pritchard, Derek K. Richards, Catriona L. Hurd
Summary: The supply of dissolved inorganic carbon is crucial for seaweed photosynthesis. Thinner boundary layers or higher CO2 concentrations in seawater increase CO2 supply to seaweed surface. Laboratory experiments and field surveys show that seaweeds with active carbon concentrating mechanisms (CCMs) can maintain their activity under different water motion conditions, while red seaweeds adjust their photosynthetic rates based on CO2 availability.
SCIENTIFIC REPORTS
(2022)
Review
Fisheries
Fangfang Yang, Zhangliang Wei, Lijuan Long
Summary: Calcification by calcified marine macroalgae is crucial for algal growth and coral reef formation, but is vulnerable to changes in global climate. Studies on the mechanisms of macroalgal calcification are limited, but new approaches such as genomics offer avenues for new understandings.
MARINE AND FRESHWATER RESEARCH
(2021)
Article
Fisheries
Maureen Ho, James McBroom, Ellie Bergstrom, Guillermo Diaz-Pulido, Joanna Norkko
Summary: Marine macroalgae have variable responses to ocean acidification and warming, with HCO3--users showing more sensitivity to future CO2 changes. The study found that environmental stressors affect carbon uptake and growth of algae, with a decoupling between photosynthesis and growth observed under interacting temperature and OA conditions.
ICES JOURNAL OF MARINE SCIENCE
(2021)
Article
Ecology
Hangxiao Li, Tianpeng Xu, Jing Ma, Futian Li, Juntian Xu
Summary: The study demonstrates that ocean acidification interacts with temperature and photoperiod to influence the growth and photosynthesis of marine diatoms, showing seasonal dependence. Positive effects of OA were observed under certain seasonal conditions, while it significantly decreased growth and photosynthesis in winter. OA also alleviated the negative effect of low temperature and short day length on key proteins in marine diatoms.
Review
Biochemistry & Molecular Biology
Nur Ili Hamizah Mustaffa, Mohd Talib Latif, Oliver Wurl
Summary: Recent studies have quantified eCA and its activity in oceans for the first time, suggesting its potential as a biochemical indicator in biomonitoring programs and future research studies. The influence of environmental stressors on phytoplankton eCA activity highlights the need for further research to better understand its role in the marine carbon cycle in changing oceans.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Limnology
Liming Qu, John Beardall, Xiaowen Jiang, Kunshan Gao
Summary: Elevated pCO(2) has differential effects on the growth rate of diatoms, slowing down growth during the night but increasing it during the day. The increased pCO(2) enhances respiratory energy supplies and photosynthetic performance, but may also lead to higher death rates when cells sink to dark ocean regions.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Engineering, Environmental
Hui Zeng, Xiangang Hu, Shaohu Ouyang, Qixing Zhou
Summary: Ocean warming weakens growth and carbon fixation, while microplastics exacerbate the effects on photosynthesis and CO2 fixation in Synechococcus sp.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Limnology
Mandy Velthuis, Joost. A. Keuskamp, Elisabeth S. Bakker, Maarten Boersma, Ulrich Sommer, Ellen van Donk, Dedmer B. Van de Waal
Summary: This study examines the stoichiometric responses of marine phytoplankton to elevated pCO(2) and warming, and finds that elevated pCO(2) increases C:N and C:P ratios and enhances phytoplankton growth rates. However, warming does not consistently alter phytoplankton elemental composition. These findings suggest a stoichiometric compensation mechanism for reduced oceanic carbon export due to declining primary production in the future.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Review
Environmental Sciences
Finnley W. R. Ross, Philip W. Boyd, Karen Filbee-Dexter, Kenta Watanabe, Alejandra Ortega, Dorte Krause-Jensen, Catherine Lovelock, Calvyn F. A. Sondak, Lennart T. Bach, Carlos M. Duarte, Oscar Serrano, John Beardall, Patrick Tarbuck, Peter I. Macreadie
Summary: Seaweed has the potential to mitigate climate change, but there are uncertainties surrounding its impact and the need for accurate carbon accounting. Four potential ways to enhance seaweed's contribution to climate change mitigation are: protecting and restoring wild seaweed forests, expanding sustainable nearshore seaweed aquaculture, offsetting industrial CO2 emissions using seaweed products, and sinking seaweed into the deep sea. Despite these opportunities, verified carbon accounting and sustainability thresholds are needed before large-scale investment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Multidisciplinary Sciences
Cale A. Miller, Amanda L. Kelley
Summary: This study investigates the impact of bioremediation methods on acidification by comparing different seagrass pools. The results suggest that habitats with mixed photosynthesizers have less decoupling between pH and aragonite saturation state.
SCIENTIFIC REPORTS
(2021)
Article
Limnology
Erik C. Krieger, Wendy A. Nelson, Johan Grand, Eric C. Le Ru, Sarah J. Bury, Amelie Cossais, Simon K. Davy, Christopher E. Cornwall
Summary: This study assesses the calcification physiology of five cool temperate coralline algae in response to different irradiance levels and finds that the enhancement of calcification rates is limited to lower irradiances. The study also suggests the existence of two calcification strategies and indicates that magnesium incorporation is determined by the magnesium to calcium ratio in the calcifying fluid.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Environmental Sciences
Eun Ju Kang, A-Reum Han, Ju-Hyoung Kim, Il-Nam Kim, Sukyeon Lee, Jun-Oh Min, Bo-Ra Nam, Young-Joon Choi, Matthew S. Edwards, Guillermo Diaz-Pulido, Changsin Kim
Summary: The study found that under ocean acidification conditions, Ulva ohnoi algae prefer CO2 and NH4+ as carbon and nitrogen sources, leading to an increase in N content and better performance in photosynthesis and growth, thus potentially increasing their bloom potential; however, elevated temperatures decrease photosynthesis and growth, reducing their bloom potential.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Silke Lischka, Michael J. J. Greenacre, Ulf Riebesell, Martin Graeve
Summary: Ocean warming and acidification pose a severe threat to pteropods in the Arctic by reducing their survival and causing the dissolution of their shells. Lipids, especially phospholipids, play a crucial role in the early-stage pteropods. Our experimental study shows that elevated temperatures and high CO2 concentrations lead to a significant decrease in total lipids, mainly due to the reduction of phospholipids. This reduction may compromise cell differentiation and energy balance in the early-stage larvae. The negative effects of warming on lipid metabolism may be a more immediate threat to pteropods than shell dissolution effects caused by acidification.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Eric Mortenson, Andrew Lenton, Elizabeth H. Shadwick, Thomas W. Trull, Matthew A. Chamberlain, Xuebin Zhang
Summary: The ocean serves as a major sink for anthropogenic heat and carbon, but the trajectories of heat and CO2 uptake diverge over the 21st century due to regional differences in physical and chemical drivers. Regional variations in heat-to-carbon uptake ratios will result in coherent regional patterns for sea surface warming and acidification by the end of this century.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Plant Sciences
Concepcion Iniguez, Jeroni Galmes, Francisco J. L. Gordillo
JOURNAL OF EXPERIMENTAL BOTANY
(2019)
Article
Plant Sciences
Concepcion Iniguez, Sebastia Capo-Bauca, Ulo Niinemets, Heather Stoll, Pere Aguilo-Nicolau, Jeroni Galmes
Article
Plant Sciences
Beatriz Fernandez-Marin, Javier Gulias, Carlos M. Figueroa, Concepcion Iniguez, Maria J. Clemente-Moreno, Adriano Nunes-Nesi, Alisdair R. Fernie, Lohengrin A. Cavieres, Leon A. Bravo, Jose Garcia-Plazaola, Jorge Gago
Article
Plant Sciences
Concepcion Iniguez, Ulo Niinemets, Kristiina Mark, Jeroni Galmes
Summary: The kinetics parameters of Rubisco are crucial for understanding enzyme catalytic properties and for photosynthesis and crop modeling. Variability in measurements may arise from differences in methods and assay conditions, and corrections and recommendations are necessary to reduce this variability and allow for comparison of data obtained in different laboratories.
JOURNAL OF EXPERIMENTAL BOTANY
(2021)
Review
Biochemistry & Molecular Biology
Concepcion Iniguez, Pere Aguilo-Nicolau, Jeroni Galmes
Summary: The rising human population and global changes are driving the need for improved agricultural resource use efficiency and crop yield. Bioengineering approaches, focusing on enhancing Rubisco functioning, show promise in optimizing photosynthesis and improving yield potential. Advances in engineering Rubisco capacity through gene modifications and expression mechanisms demonstrate potential for future improvements in crop growth.
BIOCHEMICAL SOCIETY TRANSACTIONS
(2021)
Article
Environmental Sciences
Francisco J. L. Gordillo, Raquel Carmona, Carlos Jimenez
Summary: This study simulated continuous winter darkness at a latitude of 79 degrees N and investigated the effects on four species of Arctic seaweeds. The results showed that high temperature enhanced biomass loss during darkness, and the two laminarians were unable to resume growth upon re-illumination. All species maintained photosynthetic ability during the whole dark period. The reactivation of photosynthesis seemed to involve photosystem II. This study suggests that a warmer polar night might pose a limit to the ability of multi-year seaweeds to occupy new ice-free areas.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Ecology
Victor Vazquez, Pablo Leon, Francisco J. L. Gordillo, Carlos Jimenez, Iniguez Concepcion, Kevin Mackenzie, Eileen Bresnan, Maria Segovia
Summary: The heavily calcified Emiliania huxleyi strain from the Norwegian Sea was cultured to investigate the effects of ocean acidification on growth performance, calcification, and physiological stress management. The study found that high pCO(2) affected cell growth rates, viability, and reactive oxygen species (ROS) accumulation, while low pH affected carbon uptake affinity. High CO2 had a greater impact on cell growth than low pH alone, suggesting metabolic imbalance induced by high CO2. However, calcification was not significantly reduced by either acidification method.
Article
Plant Sciences
Sebastia Capo-Bauca, Spencer Whitney, Concepcion Iniguez, Oscar Serrano, Timothy Rhodes, Jeroni Galmes
Summary: The Rubisco enzyme in Posidonia seagrass species has evolved differently from terrestrial plants, resulting in distinct catalytic properties. The Rubisco in Australian and Mediterranean Posidonia species have different carboxylation and oxygenation efficiencies, which may be influenced by their habitats and evolutionary timelines.
Article
Plant Sciences
Sebastia Capo-Bauca, Jeroni Galmes, Pere Aguilo-Nicolau, Sonia Ramis-Pozuelo, Concepcion Iniguez
Summary: Seaweeds have evolved different forms of Rubisco and CO2 concentrating mechanisms (CCMs) to adapt to the low CO2 availability in seawater. In this study, we found diversity in Rubisco kinetic traits across different macroalgal species, with ID Rubiscos being better adapted to the intracellular O-2 : CO2 ratio in marine organisms. Furthermore, the effectiveness of CCMs differed among species but showed an inverse relationship with Rubisco carboxylation efficiency.
Article
Plant Sciences
Pere Aguilo-Nicolau, Jeroni Galmes, Giacomo Fais, Sebastia Capo-Bauca, Giacomo Cao, Concepcion Iniguez
Summary: Cyanobacteria contribute significantly to the carbon cycle on Earth, fixing approximately 25% of inorganic carbon. However, the mechanisms of carbon acquisition and assimilation in Cyanobacteria are not well understood, despite their importance in understanding autotrophy origins and improving crop yield through bioengineering tools.
PHOTOSYNTHESIS RESEARCH
(2023)
Article
Plant Sciences
Angel Mateo-Ramirez, Concepcion Iniguez, Luis Miguel Fernandez-Salas, Ricardo F. Sanchez-Leal, Carlos Farias, Maria Jesus Bellanco, Juan Gil, Jose L. Rueda
Summary: The invasive seaweed Rugulopteryx okamurae has recently spread to Europe from the western Pacific, causing damage to native coastal ecosystems and ecosystem services. Large amounts of detached thalli of R. okamurae were found on deep-sea bottoms of the Gulf of Cadiz, indicating a potential threat to both coastal and deep-sea habitats. Laboratory experiments showed that the collected unattached macroalgae from deep-sea locations were healthy and capable of photosynthesis even after long periods of darkness, indicating their resilience and invasive potential.
Article
Plant Sciences
Sebastia Capo-Bauca, Concepcion Iniguez, Pere Aguilo-Nicolau, Jeroni Galmes
Summary: This study reveals an adaptive change in the Rubisco enzyme in submerged angiosperms, which shows lower catalytic efficiencies and gas affinities compared to their terrestrial and freshwater relatives, possibly in response to constant CO2 limitation in marine environments.
Correction
Plant Sciences
Sebastia Capo-Bauca, Concepcion Iniguez, Pere Aguilo-Nicolau, Jeroni Galmes
Article
Forestry
Betsy K. Rivera, Patricia L. Saez, Lohengrin A. Cavieres, Sebastia Capo-Bauca, Concepcion Iniguez, Eugenio Sanfuentes von Stowasser, Francisca Fuentes, Constanza F. Ramirez, Valentina Vallejos, Jeroni Galmes
Summary: The study focuses on the ecophysiology of the ancient species Araucaria araucana and demonstrates its characteristic traits and limitations in carbon assimilation under different environmental conditions.