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
Geochemistry & Geophysics
Yi-Wei Liu, Sebastian D. Rokitta, Bjorn Rost, Robert A. Eagle
Summary: This study investigated the carbon utilization and internal pH regulation of three calcareous coccolithophores cultured under different pCO(2) levels. The results show species-specific modes of pH control and differences in the utilization of inorganic carbon. The findings suggest a high plasticity in the utilization of dissolved inorganic carbon may explain species-specific differences in responses to ocean acidification.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Environmental Sciences
Cara Nissen, Nicolas Gruber, Matthias Muennich, Meike Vogt
Summary: The study used a high-resolution model to analyze the important role of silicifying diatoms and calcifying coccolithophores in controlling nutrient levels and stoichiometry in the Southern Ocean. Results demonstrate that the efficient consumption and export of Si(OH)4 by diatoms, as well as the export of organic matter by coccolithophores, contribute to the control of biogeochemical processes in the Southern Ocean.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Environmental Sciences
Jiahui Zhong, Yingyan Guo, Zhe Liang, Quanting Huang, Hua Lu, Jinmei Pan, Peiyuan Li, Peng Jin, Jianrong Xia
Summary: The study found that ocean warming has a greater impact on the growth of marine diatom Thalassiosira weissflogii over long-term selection experiments compared to ocean acidification. Many temperature response traits were influenced by ocean warming, indicating that it is the main driver for the evolution of T. weissflogii. However, adaptations resulting from warming can be constrained by ocean acidification, leading to trade-offs in photochemical performances.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
Lavenia Ratnarajah, Stephane Blain, Philip W. Boyd, Marion Fourquez, Ingrid Obernosterer, Alessandro Tagliabue
Summary: The study examined competition for iron between phytoplankton and bacteria in the iron-limited Southern Ocean. Results show that increased iron and light favor phytoplankton dominance, while increased LDOC and decreased light favor bacterial dominance. Bacteria can outcompete phytoplankton for iron under elevated LDOC conditions.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Ilaria Cazzaniga, Giuseppe Zibordi, Frederic Melin
Summary: This study investigates the spectral features of remote sensing reflectance in marine waters during coccolithophore blooms by analyzing radiometric data from Ocean Color sites in the Western Black Sea. The results confirm an increase in reflectance in the blue-green spectral region during coccolithophore blooms, as well as a shift towards the blue as the blooms decline and coccoliths accumulate at the surface. It also highlights the challenges in determining bloom states in optically complex waters and compares satellite data with AERONET-OC radiometric data to show agreements in extreme conditions with significant concentrations of coccoliths.
REMOTE SENSING OF ENVIRONMENT
(2021)
Article
Plant Sciences
Haimanti Biswas
Summary: This study investigates the growth response of Arctic diatom Chaetoceros gelidus under varying CO2 and light levels. The results suggest that this species has a high adaptability to variable light levels and is capable of accumulating substantial amounts of organic carbon at low CO2 levels. Additionally, under nitrogen limitation, intracellular nitrogen resources may be recycled, resulting in an increased carbon-to-nitrogen ratio within the cells.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Environmental Sciences
Dong Xu, Shanying Tong, Bingkun Wang, Xiansheng Zhang, Wei Wang, Xiaowen Zhang, Xiao Fan, Yitao Wang, Ke Sun, Naihao Ye
Summary: This study reveals that ocean acidification and warming are major environmental stressors, and the impact of warming on the growth responses of phytoplankton to ocean acidification is not well understood. The results show that high CO2 enhances the growth of Phaeodactylum tricornutum and Thalassiosira weissflogii, especially at optimum temperature. Furthermore, HC-grown cells require more energy and materials to maintain intracellular homeostasis and repair damage caused by unsuitable temperatures.
MARINE POLLUTION BULLETIN
(2022)
Article
Microbiology
Joana Barcelos E. Ramos, Susana Chaves Ribeiro, Kai George Schulz, Francisco Jose Riso Da Costa Coelho, Vanessa Oliveira, Angela Cunha, Newton Carlos Marcial Gomes, Colin Brownlee, Uta Passow, Eduardo Brito de Azevedo
Summary: The interactions between marine microbes play a crucial role in the balance of organic matter in the ocean, but the impact of rising CO2 concentrations on phytoplankton response is not well understood. This study shows that the growth rate of Emiliania huxleyi is reduced under increased CO2 concentrations, especially when coexisting with certain bacteria. Additionally, high CO2 concentrations affect the cellular content of E. huxleyi, increasing organic carbon and decreasing inorganic carbon in the presence of specific bacteria. Bacterial isolates can only survive in coexistence with E. huxleyi, and this interaction may have consequences for the balance between the microbial loop and the export of organic matter.
Article
Environmental Sciences
Jonathan Y. S. Leung, Bayden D. Russell, Melinda A. Coleman, Brendan P. Kelaher, Sean D. Connell
Summary: Ocean warming is predicted to challenge marine organisms, especially when combined with ocean acidification. Thermal history determines the physiological adjustments of marine organisms to climate change, with warm-acclimated individuals conserving energy to adapt to warming. However, compensatory feeding disappears when warming is combined with ocean acidification.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Limnology
Jiale Fan, Futian Li, Siyu Hu, Kunshan Gao, Juntian Xu
Summary: This study investigated the response of differently sized diatoms to temperature changes and found that with increasing cell size, the optimum growth temperature, maximum growth rates, and thermal niche width all decreased. Additionally, the cell volume of diatoms decreased with rising temperature, but the cellular biogenic silica content increased until the optimum growth temperature. However, warming to temperatures higher than the optimum temperature for growth significantly reduced the biogenic silica content. These findings have significant implications for ocean carbon and silica biogeochemical cycles.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Limnology
Marianne G. Camoying, Scarlett Trimborn
Summary: The Southern Ocean is highly vulnerable to climate change and it plays a significant role in absorbing CO2. Coastal shelf waters around the Western Antarctic Peninsula have been experiencing rapid warming, which will expose phytoplankton to ocean acidification and high light intensities. In a multiple-stressor experiment, the response of the Antarctic cryptophyte species Geminigera cryophila to warming, ocean acidification, and high light intensities was evaluated. The results showed that warming and high light, rather than pCO2 levels, had a significant impact on G. cryophila's growth.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Geosciences, Multidisciplinary
Fabian A. Gomez, Rik Wanninkhof, Leticia Barbero, Sang-Ki Lee
Summary: This study used an ocean-biogeochemical model to assess the spatiotemporal patterns of ocean acidification in the Gulf of Mexico from 1981 to 2014. The findings show that alkalinity from the Mississippi-Atchafalaya River System counteracted the progression of ocean acidification.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Andres S. Rigual-Hernandez, Gerald Langer, Francisco Javier Sierro, Helen Bostock, Jose Manuel Sanchez-Santos, Scott Davidson Nodder, Tom W. Trull, Anne Marie Ballegeer, Andrew D. Moy, Ruth Eriksen, Laura Makowka, Thibauld M. Bejard, Francisco Henri Rigal-Munoz, Alberto Hernandez-Martin, Maria Zorita-Viota, Jose Abel Flores
Summary: The Subantarctic Zone of the Southern Ocean is crucial for the Earth system, but there is limited data on its ecosystems, hindering predictions of future response to climate change. This study reconstructs the state of a key phytoplankton species and finds that environmental factors, especially warming and ocean acidification, have led to a reduction in coccolith size. These findings have implications for the efficiency of the marine carbon cycle and suggest the potential use of coccolith size as a proxy for growth rate.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Ecology
David Demory, Joshua S. Weitz, Anne-Claire Baudoux, Suzanne Touzeau, Natalie Simon, Sophie Rabouille, Antoine Sciandra, Olivier Bernard
Summary: This study explored the impact of temperature on viral infection of phytoplankton, revealing negative consequences of high temperatures and suggesting a temperature-dependent threshold. Long-term dynamics in environments with different average temperatures showed potential different states, while climate change may influence virus-host dynamics differently based on the virus-host pair. Temperature-dependent changes in virus particle infectivity may lead to shifts in virus-host habitats in warmer oceans.
Article
Biology
Michael D. Jarrold, Leela J. Chakravarti, Emma M. Gibbin, Felix Christen, Gloria Massamba-N'Siala, Pierre U. Blier, Piero Calosi
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2019)
Article
Ecology
Ella Guscelli, John I. Spicer, Piero Calosi
ECOLOGY AND EVOLUTION
(2019)
Article
Marine & Freshwater Biology
Cynthia Thibault, Gloria Massamba-N'Siala, Fanny Noisette, Fanny Vermandele, Mathieu Babin, Piero Calosi
Article
Biology
Daniel P. Small, Piero Calosi, Samuel P. S. Rastrick, Lucy M. Turner, Stephen Widdicombe, John Spicer
JOURNAL OF EXPERIMENTAL BIOLOGY
(2020)
Article
Biology
Wilco C. E. P. Verberk, Piero Calosi, Francois Bruschoux, John Spicer, Theodore Garland, David T. Bilton
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2020)
Article
Environmental Sciences
Mathilde Chemel, Fanny Noisette, Denis Chabot, Ella Guscelli, Luc Leclerc, Piero Calosi
FRONTIERS IN MARINE SCIENCE
(2020)
Article
Biotechnology & Applied Microbiology
Astrid Tempestini, Gloria Massamba-N'Siala, Fanny Vermandele, Nicholas Beaudreau, Mathieu Mortz, France Dufresne, Piero Calosi
Article
Marine & Freshwater Biology
Nicholas Beaudreau, Gloria Massamba-N'Siala, Claude Belzile, Piero Calosi, France Dufresne
Summary: This study assesses the relationships between genome size and life-history traits in six interstitial marine annelid species of the genus Ophryotrocha, with additional data from 18 annelid species for broader phylogenetic comparison. Unexpectedly, genome sizes in Ophryotrocha species were found to be larger than previously reported, challenging the hypothesis of small genomes in meiofaunal annelids in harsh interstitial habitats. Positive relationships were observed between genome size and nucleus size, age at first egg mass deposition, body size, and lifespan within Ophryotrocha, and these relationships held up in the broader phylogenetic comparison, highlighting the important role of genome size in the evolution of life-history traits in annelids.
Article
Multidisciplinary Sciences
Joanne M. Bennett, Jennifer Sunday, Piero Calosi, Fabricio Villalobos, Brezo Martinez, Rafael Molina-Venegas, Miguel B. Araujo, Adam C. Algar, Susana Clusella-Trullas, Bradford A. Hawkins, Sally A. Keith, Ingolf Kuehn, Carsten Rahbek, Laura Rodriguez, Alexander Singer, Ignacio Morales-Castilla, Miguel Angel Olalla-Tarraga
Summary: Understanding the evolution of species' thermal limits across the tree of life is crucial for predicting responses to climate change. Research suggests that most variation in thermal tolerance is due to adaptation to current climatic extremes and the existence of evolutionary ‘attractors’. Cold tolerance has evolved more rapidly than heat tolerance, and historical climate legacies play an important role in ectotherms.
NATURE COMMUNICATIONS
(2021)
Article
Ecology
Davide Spatafora, Gloria Massamba N'Siala, Federico Quattrocchi, Marco Milazzo, Piero Calosi
Summary: Plasticity in parental care investment allows organisms to respond to rapid environmental changes in marine ectotherms, with potential trade-offs between offspring survival and parents' fitness under ongoing ocean warming. The study found a decrease in parental care activity and hatching success under elevated temperatures, indicating potential cost-benefit trade-offs between immediate and longer-term fitness. Plasticity in parental care behavior may partially mitigate the negative effects of temperature-dependent impacts.
ECOLOGY AND EVOLUTION
(2021)
Article
Biochemistry & Molecular Biology
Fanny Noisette, Piero Calosi, Diana Madeira, Mathilde Chemel, Kayla Menu-Courey, Sarah Piedalue, Helen Gurney-Smith, Dounia Daoud, Kumiko Azetsu-Scott
Summary: The study focused on the sensitivity of successive life stages of a marine invertebrate species to elevated pCO(2), finding that larvae exhibited greater tolerance to high pCO(2) levels, while juveniles showed reduced survival and increased development time at the highest pCO(2) levels tested, with no indication of metabolomic reprogramming.
Article
Multidisciplinary Sciences
Travis C. Tai, Piero Calosi, Helen J. Gurney-Smith, William W. L. Cheung
Summary: Ocean acidification has varying impacts on lobster populations, with the largest effects seen in juvenile stages. Managing fishing pressure and size limits can help mitigate some negative effects of OA, but the overall impact of climate change overshadows these population gains. Addressing greenhouse gas emissions is crucial for long-term population resilience.
SCIENTIFIC REPORTS
(2021)
Article
Biodiversity Conservation
Ludovic Pascal, Joannie Cool, Philippe Archambault, Piero Calosi, Andre L. R. Cuenca, Alfonso O. Mucci, Gwenaelle Chaillou
Summary: The declining O-2 concentrations in the global ocean have led to changes in benthic communities and sediment biogeochemistry. The authors found that below an O-2 threshold of approximately 63 mu M, there were significant shifts in macrobenthic community assemblages and bioturbation rates decreased. This study highlights the importance of bioturbating species in mitigating the biogeochemical consequences of hypoxia and provides insights for predicting future changes in benthic ecosystems.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Biology
Ella Guscelli, Fanny Noisette, Denis Chabot, Pierre U. Blier, Tanya Hansen, Manon Cassista-Da Ros, Pierre Pepin, Katherine R. Skanes, Piero Calosi
Summary: This study aimed to determine the sensitivity of the northern shrimp, Pandalus borealis, to future ocean warming and acidification. The results showed that the survival of the shrimp was negatively affected by high temperatures and low pH, regardless of their geographic origin. Additionally, the overall performance of the shrimp was similar among different origins, but the stability of aerobic metabolism was related to specific cellular adjustments.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2023)
Article
Ecology
Nikki A. Moore, Ignacio Morales-Castilla, Anna L. Hargreaves, Miguel Angel Olalla-Tarraga, Fabricio Villalobos, Piero Calosi, Susana Clusella-Trullas, Juan G. Rubalcaba, Adam C. Algar, Brezo Martinez, Laura Rodriguez, Sarah Gravel, Joanne M. Bennett, Greta C. Vega, Carsten Rahbek, Miguel B. Araujo, Joey R. Bernhardt, Jennifer M. Sunday
Summary: Understanding how temperature affects species' distribution is crucial for assessing their responses to climate change. The study finds that marine species and terrestrial species from the tropics occupy temperatures that closely match their thermal tolerances. However, terrestrial species from temperate and polar latitudes are absent from warm areas that they could potentially occupy, suggesting a trade-off between adaptation to cold environments and abilities to contend in the tropics.
NATURE ECOLOGY & EVOLUTION
(2023)