1,428 results match your criteria pco2 temperature


Exposure time modulates the effects of climate change-related stressors on fertile sporophytes and early-life stage performance of a habitat-forming kelp species.

Environ Pollut 2021 May 4;286:117224. Epub 2021 May 4.

Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Coquimbo, Chile; Laboratorio de Ecología y Conducta de La Ontogenia Temprana (LECOT), Coquimbo, Chile. Electronic address:

Understanding the impact of increases in pCO (OA) and extreme changes in temperature on marine organisms is critical to predicting how they will cope with climate change. We evaluated the effects of OA as well as warming and cooling trend temperature on early reproductive traits of Lessonia trabeculata, a bio-engineer kelp species. Sori discs were maintained for an exposure time (ET) of 3 (T3) and 7 (T7) days to one of two contrasting pCO levels (450 and 1100 μatm). Read More

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Controlling factors of seasonal and spatial variation of riverine CO partial pressure and its implication for riverine carbon flux.

Sci Total Environ 2021 Apr 30;786:147332. Epub 2021 Apr 30.

Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, China. Electronic address:

Global carbon cycle is closely related to the earth's energy budget, because CO plays an active role in the global climate change. The higher CO partial pressure (pCO) in inland water in comparison with atmosphere, causing a CO evasion from water to the air. However, the relationship between CO evasion, riverine carbon export, and hydrochemistry in watershed has remained largely unknown. Read More

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Environmental impacts on single-cell variation within a ubiquitous diatom: The role of growth rate.

PLoS One 2021 7;16(5):e0251213. Epub 2021 May 7.

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Biologische Anstalt Helgoland, Helgoland, Germany.

Morphological and physiological characteristics of phytoplankton cells are highly sensitive to changes in environmental conditions and, in turn, influence the dynamics of phytoplankton populations and communities. To cope with environmental change, trait variability and phenotypic plasticity may play an important role. Since global change comprises simultaneous changes in abiotic parameters, we assessed the impact of multiple drivers on functional traits of the diatom Thalassiosira (Conticribra) weissflogii by manipulating concurrently temperature, pCO2, and dissolved nitrogen:phosphorus (N:P) ratio. Read More

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Carbonate chemistry seasonality in a tropical mangrove lagoon in La Parguera, Puerto Rico.

PLoS One 2021 5;16(5):e0250069. Epub 2021 May 5.

Ocean Process Analysis Laboratory, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, New Hampshire, United States of America.

We investigated the seasonal carbonate chemistry variability within a semi-enclosed tropical mangrove lagoon in southwestern Puerto Rico. Biweekly measurements of seawater temperature, salinity, total alkalinity (TA), and dissolved inorganic carbon (DIC) were conducted from 2014 to 2018. We describe the possible mechanisms driving the observed variability by correlating the DIC/TA ratio with pH and Ωarg, suggesting that the mean pH (7. Read More

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The Affinity of Hemoglobin for Oxygen Is Not Altered During COVID-19.

Front Physiol 2021 12;12:578708. Epub 2021 Apr 12.

Service de Physiologie et Explorations Fonctionnelles, Hôpital Avicenne, GHUPSSD, Assistance Publique-Hôpitaux de Paris, Bobigny, France.

A computational proteomic analysis suggested that SARS-CoV-2 might bind to hemoglobin (Hb). The authors hypothesized that this phenomenon could result in a decreased oxygen (O) binding and lead to hemolytic anemia as well. The aim of this work was to investigate whether the affinity of Hb for O was altered during COVID-19. Read More

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Dietary Exposure to Low Levels of Crude Oil Affects Physiological and Morphological Phenotype in Adults and Their Eggs and Hatchlings of the King Quail ().

Front Physiol 2021 9;12:661943. Epub 2021 Apr 9.

Developmental Integrative Biology Research Group, Department of Biological Sciences, University of North Texas, Denton, TX, United States.

Despite the current knowledge of the devastating effects of external exposure to crude oil on animal mortality, the study of developmental, transgenerational effects of such exposure has received little attention. We used the king quail as an animal model to determine if chronic dietary exposure to crude oil in a parental population would affect morpho-physiological phenotypic variables in their immediate offspring generation. Adult quail were separated into three groups: (1) Control, and two experimental groups dietarily exposed for at least 3 weeks to (2) Low (800 PAH ng/g food), or (3) High (2,400 PAH ng/g food) levels of crude oil. Read More

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Predictive factors of continuous negative extrathoracic pressure management failure in children with moderate to severe respiratory syncytial virus infection.

Sci Rep 2021 Apr 13;11(1):8063. Epub 2021 Apr 13.

Department of Pediatrics, Takatsuki General Hospital, 1-3-13 Kosobe-cho, Takatsuki City, Osaka, 5691192, Japan.

Continuous negative extrathoracic pressure (CNEP) might be beneficial for children with severe respiratory tract infections. However, there are no available data on the predictors of its failure among individuals with respiratory syncytial virus (RSV) infections. Here, we conducted a retrospective cohort study between October 1, 2015 and October 31, 2018 in hospitalized children with moderate to severe symptoms of respiratory syncytial virus (RSV) infections. Read More

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An explainable machine learning algorithm for risk factor analysis of in-hospital mortality in sepsis survivors with ICU readmission.

Comput Methods Programs Biomed 2021 Jun 7;204:106040. Epub 2021 Mar 7.

Faculty of Anesthesiology, Changhai Hospital, Naval Medical University, 168 Changhai Road, Shanghai 200433, China. Electronic address:

Background And Objective: Patients who survive sepsis in the intensive care unit (ICU) (sepsis survivors) have an increased risk of long-term mortality and ICU readmission. We aim to identify the risk factors for in-hospital mortality in sepsis survivors with later ICU readmission and visualize the quantitative relationship between the individual risk factors and mortality by applying machine learning (ML) algorithm.

Methods: Data were obtained from the Medical Information Mart for Intensive Care III (MIMIC-III) database for sepsis and non-sepsis ICU survivors who were later readmitted to the ICU. Read More

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Carbonate chemistry variability in the southern Yellow Sea and East China Sea during spring of 2017 and summer of 2018.

Sci Total Environ 2021 Mar 16;779:146376. Epub 2021 Mar 16.

School of Marine Science and Policy, University of Delaware, Newark, DE 19716, United States.

Marginal seas are highly productive and disproportionately large contributors to global air-sea CO fluxes. Due to complex physical and biogeochemical conditions, the southern Yellow-East China Sea is an ideal site for studying carbonate chemistry variability. The carbonate system was investigated in the area in spring of 2017 and summer of 2018. Read More

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Seasonal dependence of false-positives in detection of anomalous pCO using the covariance method with dissolved oxygen in monitoring offshore CO storage sites.

Mar Pollut Bull 2021 May 6;166:112238. Epub 2021 Mar 6.

Geological Carbon dioxide Storage Technology Research Association, Kizugawa 619-0292, Japan; CO(2) Storage Research Group, Research Institute of Innovative Technology for the Earth, Kizugawa 619-0292, Japan. Electronic address:

To elucidate the dependence of frequency of false-positives on the season for the covariance threshold based on partial pressure of CO (pCO) and the percentage dissolved oxygen saturation (DO%) for monitoring offshore CO storage, the deviation of observed pCO from a linear regression of pCO on DO% was investigated. The analyzed data were continuously observed for nearly 1 year in a semi-enclosed bay. Observed pCO tended to be higher than the linear regression in summer and fall, when false-positives would be more frequent. Read More

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The combined effects of climate change stressors and predatory cues on a mussel species.

Sci Total Environ 2021 Jul 19;776:145916. Epub 2021 Feb 19.

Laboratorio de Fisiología y Genética Marina (FIGEMA), Departamento de Acuicultura, Facultad de Ciencias de Mar, Universidad Católica del Norte, Coquimbo, Chile; Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Coquimbo, Chile.

In order to make adequate projections on the consequences of climate change stressors on marine organisms, it is important to know how impacts of these stressors are affected by the presence of other species. Here we assessed the direct effects of ocean warming (OW) and acidification (OA) along with non-consumptive effects (NCEs) of a predatory crab and/or a predatory snail on the habitat-forming mussel Perumytilus purpuratus. Mussels were exposed for 10-14 weeks to contrasting pCO (500 and 1400 μatm) and temperature (15 and 20 °C) levels, in the presence/absence of cues from one or two predator species. Read More

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Adaptive responses of free-living and symbiotic microalgae to simulated future ocean conditions.

Glob Chang Biol 2021 05 20;27(9):1737-1754. Epub 2021 Feb 20.

School of BioSciences, University of Melbourne, Melbourne, VIC, Australia.

Marine microalgae are a diverse group of microscopic eukaryotic and prokaryotic organisms capable of photosynthesis. They are important primary producers and carbon sinks but their physiology and persistence are severely affected by global climate change. Powerful experimental evolution technologies are being used to examine the potential of microalgae to respond adaptively to current and predicted future conditions, as well as to develop resources to facilitate species conservation and restoration of ecosystem functions. Read More

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Thermal stress reduces pocilloporid coral resilience to ocean acidification by impairing control over calcifying fluid chemistry.

Sci Adv 2021 Jan 8;7(2). Epub 2021 Jan 8.

Department of Atmospheric and Oceanic Sciences, Institute of the Environment and Sustainability, University of California, Los Angeles, 520 Portola Plaza, Los Angeles, CA 90095, USA.

The combination of thermal stress and ocean acidification (OA) can more negatively affect coral calcification than an individual stressors, but the mechanism behind this interaction is unknown. We used two independent methods (microelectrode and boron geochemistry) to measure calcifying fluid pH (pH) and carbonate chemistry of the corals and grown under various temperature and pCO conditions. Although these approaches demonstrate that they record pH over different time scales, they reveal that both species can cope with OA under optimal temperatures (28°C) by elevating pH and aragonite saturation state (Ω) in support of calcification. Read More

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January 2021

Reconciling atmospheric CO, weathering, and calcite compensation depth across the Cenozoic.

Sci Adv 2021 Jan 22;7(4). Epub 2021 Jan 22.

School of Ocean and Earth Science and Technology, Department of Oceanography, University of Hawaii, 1000 Pope Road, Honolulu, HI 96822, USA.

The Cenozoic era (66 to 0 million years) is marked by long-term aberrations in carbon cycling and large climatic shifts, some of which challenge the current understanding of carbon cycle dynamics. Here, we investigate possible mechanisms responsible for the observed long-term trends by using a novel approach that features a full-fledged ocean carbonate chemistry model. Using a compilation of pCO, pH, and calcite compensation depth (CCD) observational evidence and a suite of simulations, we reconcile long-term Cenozoic climate and CCD trends. Read More

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January 2021

American lobster postlarvae alter gene regulation in response to ocean warming and acidification.

Ecol Evol 2021 Jan 29;11(2):806-819. Epub 2020 Dec 29.

Darling Marine Center University of Maine School of Marine Sciences Walpole ME USA.

Anthropogenic carbon emissions released into the atmosphere is driving rapid, concurrent increases in temperature and acidity across the world's oceans. Disentangling the interactive effects of warming and acidification on vulnerable life stages is important to our understanding of responses of marine species to climate change. This study evaluates the interactive effects of these stressors on the acute response of gene expression of postlarval American lobster (), a species whose geographic range is warming and acidifying faster than most of the world's oceans. Read More

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January 2021

Non-invasive MRI Studies of Ventilatory and Cardiovascular Performance in Edible Crabs During Warming Under Elevated CO Levels.

Front Physiol 2020 11;11:596529. Epub 2021 Jan 11.

Integrative Ecophysiology, Alfred-Wegener-Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany.

The thermal tolerance of marine decapod crustacea is defined through their capacities for oxygen uptake and distribution. High ambient CO levels were previously shown to reduce hemolymph oxygen levels at enhanced cardiac performance during warming. This study investigated the impacts of warming under two CO levels on ventilation and hemolymph circulation in edible crabs . Read More

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January 2021

Climate change alters the haemolymph microbiome of oysters.

Mar Pollut Bull 2021 Mar 20;164:111991. Epub 2021 Jan 20.

The University of Sydney, School of Life and Environmental Sciences, Camperdown, New South Wales 2006, Australia.

The wellbeing of marine organisms is connected to their microbiome. Oysters are a vital food source and provide ecological services, yet little is known about how climate change such as ocean acidification and warming will affect their microbiome. We exposed the Sydney rock oyster, Saccostrea glomerata, to orthogonal combinations of temperature (24, 28 °C) and pCO (400 and 1000 μatm) for eight weeks and used amplicon sequencing of the 16S rRNA (V3-V4) gene to characterise the bacterial community in haemolymph. Read More

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Bulk volume susceptibility difference between deoxyhemoglobin and oxyhemoglobin for HbA and HbS: A comparative study.

Magn Reson Med 2021 Jun 21;85(6):3383-3393. Epub 2021 Jan 21.

Mallinckrodt Institute of Radiology, Washington University in St. Louis, St. Louis, Missouri, USA.

Purpose: Sickle cell anemia is a blood disorder that alters the morphology and the oxygen affinity of the red blood cells. Cerebral oxygen extraction fraction measurements using quantitative BOLD contrast have been used for assessing inadequate oxygen delivery and the subsequent risk of ischemic stroke in sickle cell anemia. The BOLD signal in MRI studies relies on , the bulk volume susceptibility difference between fully oxygenated and fully deoxygenated blood. Read More

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Comparative Assessment of Thermotolerance in Dorper and Second-Cross (Poll Dorset/Merino × Border Leicester) Lambs.

Animals (Basel) 2020 Dec 20;10(12). Epub 2020 Dec 20.

Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC 3010, Australia.

The objective of this study was to compare the thermotolerance of second-cross (SC; Poll Dorset × Merino × Border Leicester) and Dorper lambs. Dorper and SC lambs (4-5 months of age) were subjected to cyclic heat stress (HS) (28-40 °C). The temperature was increased to 38-40 °C between 800 and 1700 h daily and maintained at 28 °C for the remainder of the day (30-60% relative humidity (RH)) in climatic chambers for 2 weeks ( = 12/group), with controls maintained in a thermoneutral (TN) (18-21 °C, 40-50% RH) environment ( = 12/group). Read More

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December 2020

Gene expression patterns of red sea urchins (Mesocentrotus franciscanus) exposed to different combinations of temperature and pCO during early development.

BMC Genomics 2021 Jan 7;22(1):32. Epub 2021 Jan 7.

Department of Ecology, Evolution and Marine Biology, University of California Santa Barbara, Santa Barbara, CA, 93106, USA.

Background: The red sea urchin Mesocentrotus franciscanus is an ecologically important kelp forest herbivore and an economically valuable wild fishery species. To examine how M. franciscanus responds to its environment on a molecular level, differences in gene expression patterns were observed in embryos raised under combinations of two temperatures (13 °C or 17 °C) and two pCO levels (475 μatm or 1050 μatm). Read More

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January 2021

Responses of branching reef corals and to elevated temperature and pCO.

PeerJ 2020 21;8:e10562. Epub 2020 Dec 21.

Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus, Motobu, Okinawa, Japan.

Anthropogenic emission of CO into the atmosphere has been increasing exponentially, causing ocean acidification (OA) and ocean warming (OW). The "business-as-usual" scenario predicts that the atmospheric concentration of CO may exceed 1,000 µatm and seawater temperature may increase by up to 3 °C by the end of the 21 century. Increases in OA and OW may negatively affect the growth and survival of reef corals. Read More

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December 2020

Cross-Linked Mixed-Matrix Membranes Using Functionalized UiO-66-NH into PEG/PPG-PDMS-Based Rubbery Polymer for Efficient CO Separation.

ACS Appl Mater Interfaces 2020 Dec 18;12(52):57916-57931. Epub 2020 Dec 18.

Organic Material Synthesis Laboratory, Department of Chemistry, Incheon National University, Incheon 22012, Korea.

Mixed-matrix membranes (MMMs) with an ideal polymer-filler interface and high gas separation performance are very challenging to fabricate because of incompatibility between the fillers and the polymer matrix. This work provides a simple technique to prepare a series of cross-linked MMMs (xMMM@) by covalently attaching UiO-66-NB metal-organic frameworks (MOFs) within the PEG/PPG-PDMS copolymer matrix via ring-opening metathesis polymerization and in situ membrane casting. The norbornene-modified MOF (UiO-66-NB) is successfully copolymerized and dispersed homogeneously into a PEG/PPG-PDMS matrix because of very fast polymer formation and strong covalent interaction between MOFs and the rubbery polymer. Read More

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December 2020

Interplay of microbial communities with mineral environments in coralline algae.

Sci Total Environ 2021 Feb 3;757:143877. Epub 2020 Dec 3.

Laboratorio de Bioingeniería y Ciencias Ambientales (BICA), Departamento Académico de Ingeniería en Pesquerías, Universidad Autónoma de Baja California Sur, La Paz, BCS, Mexico. Electronic address:

Coralline algae are worldwide carbonate builders, considered to be foundational species and biodiversity hotspots. Coralline habitats face increasing pressure from human activities and effects related to Global Change, yet their ecological properties and adaptive responses remain poorly understood. The relationships of the algal microbiota with the mineral bioconstructions, as well as plasticity and resilience of coralline holobionts in a changing environment, are of particular interest. Read More

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February 2021

Carbonate-silicate cycle predictions of Earth-like planetary climates and testing the habitable zone concept.

Nat Commun 2020 12 1;11(1):6153. Epub 2020 Dec 1.

Virtual Planetary Laboratory at the University of Washington, Seattle, WA, 98195, USA.

In the conventional habitable zone (HZ) concept, a CO-HO greenhouse maintains surface liquid water. Through the water-mediated carbonate-silicate weathering cycle, atmospheric CO partial pressure (pCO) responds to changes in surface temperature, stabilizing the climate over geologic timescales. We show that this weathering feedback ought to produce a log-linear relationship between pCO and incident flux on Earth-like planets in the HZ. Read More

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December 2020

A new sea-level record for the Neogene/Quaternary boundary reveals transition to a more stable East Antarctic Ice Sheet.

Proc Natl Acad Sci U S A 2020 12 23;117(49):30980-30987. Epub 2020 Nov 23.

Institute of Earth Sciences, Heidelberg University, 69120 Heidelberg, Germany.

Sea-level rise resulting from the instability of polar continental ice sheets represents a major socioeconomic hazard arising from anthropogenic warming, but the response of the largest component of Earth's cryosphere, the East Antarctic Ice Sheet (EAIS), to global warming is poorly understood. Here we present a detailed record of North Atlantic deep-ocean temperature, global sea-level, and ice-volume change for ∼2.75 to 2. Read More

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December 2020

The combined effects of ocean acidification and warming on a habitat-forming shell-crushing predatory crab.

Sci Total Environ 2021 Mar 11;758:143587. Epub 2020 Nov 11.

Laboratorio de Fisiología y Genética Marina (FIGEMA), Departamento de Acuicultura, Facultad de Ciencias de Mar, Universidad Católica del Norte, Coquimbo, Chile; Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Coquimbo, Chile.

In mid rocky intertidal habitats the mussel Perumytilus purpurarus monopolizes the substratum to the detriment of many other species. However, the consumption of mussels by the shell-crushing crab Acanthocyclus hassleri creates within the mussel beds space and habitat for several other species. This crab uses its disproportionately large claw to crush its shelled prey and plays an important role in maintaining species biodiversity. Read More

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The power struggle: assessing interacting global change stressors via experimental studies on sharks.

Sci Rep 2020 11 16;10(1):19887. Epub 2020 Nov 16.

Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, QLD, Australia.

Ocean warming and acidification act concurrently on marine ectotherms with the potential for detrimental, synergistic effects; yet, effects of these stressors remain understudied in large predatory fishes, including sharks. We tested for behavioural and physiological responses of blacktip reef shark (Carcharhinus melanopterus) neonates to climate change relevant changes in temperature (28 and 31 °C) and carbon dioxide partial pressures (pCO; 650 and 1050 µatm) using a fully factorial design. Behavioural assays (lateralisation, activity level) were conducted upon 7-13 days of acclimation, and physiological assays (hypoxia tolerance, oxygen uptake rates, acid-base and haematological status) were conducted upon 14-17 days of acclimation. Read More

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November 2020

Maternal effects in gene expression of interspecific coral hybrids.

Mol Ecol 2021 01 29;30(2):517-527. Epub 2020 Nov 29.

Australian Institute of Marine Science, Townsville, QLD, Australia.

Maternal effects have been well documented for offspring morphology and life history traits in plants and terrestrial animals, yet little is known about maternal effects in corals. Further, few studies have explored maternal effects in gene expression. In a previous study, F1 interspecific hybrid and purebred larvae of the coral species Acropora tenuis and Acropora loripes were settled and exposed to ambient or elevated temperature and pCO conditions for 7 months. Read More

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January 2021

Unarousable child with a short bowel.

Arch Dis Child Educ Pract Ed 2020 Oct 29. Epub 2020 Oct 29.

Paediatrics, IRCCS Materno Infantile Burlo Garofolo, Trieste, Italy.

Unarousable child with short bowelA 4-year-old boy was admitted with progressive lethargy of a few hours' duration and no other symptoms. His medical history was relevant for short bowel syndrome (SBS), following neonatal volvulus, with residual bowel length of 23 cm and intact ileocecal valve. He had similar self-limiting episodes in the past, after weaning parenteral nutrition, especially after eating large meals. Read More

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October 2020

Impact of Ocean Warming and Acidification on Symbiosis Establishment and Gene Expression Profiles in Recruits of Reef Coral .

Front Microbiol 2020 30;11:532447. Epub 2020 Sep 30.

CAS Key Laboratory of Tropical Marine Bio-resources and Ecology; Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.

The onset of symbiosis and the early development of most broadcast spawning corals play pivotal roles in recruitment success, yet these critical early stages are threatened by multiple stressors. However, molecular mechanisms governing these critical processes under ocean warming and acidification are still poorly understood. The present study investigated the interactive impact of elevated temperature (∼28. Read More

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September 2020