Ocean warming and acidification interactively affect the coccolithophore physiology and drives major biogeochemical changes. While numerous studies investigated coccolithophore under short-term conditions, knowledge on how different transitional periods over long-exposure could influence the element, macromolecular and metabolic changes for its acclimation are largely unknown. We cultured the coccolithophore Chrysotila dentata, (culture generations of 1st, 10th, and 20th) under present (low-temperature low-carbon-dioxide [LTLC]) and projected (high-temperature high-carbon-dioxide [HTHC]) ocean conditions. We examined elemental and macromolecular component changes and sequenced a transcriptome. We found that with long-exposure, most physiological responses in HTHC cells decreased when compared with those in LTLC, however, HTHC cell physiology showed constant elevation between each generation. Specifically, compared to 1st generation, the 20th generation HTHC cells showed increases in quota carbon (Qc:29%), nitrogen (Q :101%), and subsequent changes in C:N-ratio (68%). We observed higher lipid accumulation than carbohydrates within HTHC cells under long-exposure, suggesting that lipids were used as an alternative energy source for cellular acclimation. Protein biosynthesis pathways increased their efficiency during long-term HTHC condition, indicating that cells produced more proteins than required to initiate acclimation. Our findings suggest that the coccolithophore resilience increased between the 1st-10th generation to initiate the acclimation process under ocean warming and acidifying conditions.
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http://dx.doi.org/10.1111/1462-2920.16343 | DOI Listing |
Environ Sci Technol
December 2024
International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai Ocean University, Shanghai 201306, China.
Additives leached from tire particles (TPs) after entering the marine environment inevitably interact with marine life. Marine heatwaves (MHWs) would play a more destructive role than ocean warming during the interaction of pollutants and marine life. To evaluate the potential risks of TPs leachate under MHWs, the physiological and nutrient metabolic endpoints of microalgae were observed for 7 days while being exposed to TPs leachate at current or predicted concentrations under MHWs.
View Article and Find Full Text PDFConserv Physiol
December 2024
Department of Marine Bioscience, Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8564, Japan.
The physiological performance of ectotherms is influenced by temperature, raising concerns about the impact of global warming on ectotherms. Understanding the relationship between ecologically relevant temperatures and the physiological performance of ectotherms provides a basis for assessing their resilience to changing environments. Absolute aerobic scope (AAS) is a functional metric of the thermal performance of aquatic ectotherms.
View Article and Find Full Text PDFBMC Genomics
December 2024
Department of Biological Sciences, Ecological Genetics Laboratory, University of New Hampshire, 38 Academic Way, Durham, NH, 03824, USA.
Great Bay Estuary (GBE), within the rapidly warming Gulf of Maine, has experienced significant ecological shifts this century due to naturalization of invasive species. The range expansion of the American blue crab (Callinectes sapidus) currently underway from the mid-Atlantic northward brings the possibility of similar ecological shifts. This study accounts recent trapping and diet analysis of C.
View Article and Find Full Text PDFSci Total Environ
December 2024
Department of Natural Resources, Isfahan University of Technology, Isfahan, Iran.
Marine Heatwaves (MHWs) are prolonged episodes of above- 'normal' Sea Surface Temperature (SST) which have imposed detrimental impacts on oceans and their dependent ecosystem services. The key question still remained unresolved or at least still not fully addressed in MHW science, is 'What is a valid normal or baseline?'. In other words, can the conventional 'normal' serve as a realistic valid baseline in today's oceans experiencing the impacts of contemporaneous climatic changes and global warming during anthropogenic era? To robustly address this issue, we attempted to propose a methodology for identifying MHW thresholds that accounts for SST warming.
View Article and Find Full Text PDFComp Biochem Physiol Part D Genomics Proteomics
December 2024
School for the Environment, University of Massachusetts Boston, Boston, MA 02125, USA; Presidents Office, Ursinus College, Collegeville, PA 19426, USA.
The Gulf of Maine, home to American lobster, Homarus americanus, is experiencing rapid ocean warming (OW) and acidification (OA) due to climate change. While some studies have investigated the effects of either ocean acidification (OA) or warming (OW) on lobsters, few explore the interaction of these stressors, particularly on gene expression. We evaluated the effects of OA and OW on early benthic juvenile lobster transcriptomics using RNA sequencing and RT-qPCR through two distinct aquarium experiments.
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