Haemolymph pH of two important mollusc species is susceptible to seawater buffering capacity instead of pH or pCO2

Marine Environmental Research, Journal Year: 2023, Volume and Issue: 188, P. 106018 - 106018

Published: May 4, 2023

Language: Английский

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Short-term acidification promotes diverse iron acquisition and conservation mechanisms in upwelling-associated phytoplankton

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Nov. 8, 2023

Coastal upwelling regions are among the most productive marine ecosystems but may be threatened by amplified ocean acidification. Increased acidification is hypothesized to reduce iron bioavailability for phytoplankton thereby expanding limitation and impacting primary production. Here we show from community molecular levels that in an region respond short-term exposure with uptake pathways strategies cellular demand. A combined physiological multi-omics approach was applied trace metal clean incubations introduced 1200 ppm CO2 up four days. Although variable, molecular-level responses indicate a prioritization of less hindered reductions utilization. Growth, nutrient uptake, compositions remained largely unaffected suggesting these mechanisms confer resistance acidification; however, speculate demand only temporarily satisfied, longer-term without increased inputs result stress.

Language: Английский

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The synergistic effects of elevated temperature and CO2-induced ocean acidification reduce cardiac performance and increase disease susceptibility in subadult, female American lobsters Homarus americanus H. Milne Edwards, 1837 (Decapoda: Astacidea: Nephropidae) from the Gulf of Maine

Journal of Crustacean Biology, Journal Year: 2020, Volume and Issue: 40(5), P. 634 - 646

Published: June 5, 2020

Abstract Increased greenhouse gas emissions have caused rapid ocean warming (OW) and reduced pH via acidification (OA). Both OW OA will likely impact marine crustaceans, but they are often examined in isolation. We conducted an environmental-stressor experiment to understand how exposure current summer conditions (16 °C, 8.0), only (20 7.6), or both warming, OAW differentially influence thermal physiology immune response of female subadults the American lobster, Homarus americanus H. Milne Edwards, 1837. Following a 42 d exposure, cardiac performance was assessed during acute stress, lobsters were subjected subsequent 21 pathogen challenge with bacterium Aerococcus viridans var. homari, causative agent gaffkemia. Lobsters under had significantly lower (P ≤ 0.02) Arrhenius break temperatures (ABT), indicator limits capacity, compared exposed all other treatments, suggesting these stressors act synergistically reduce physiological performance. Individuals from treatments also 0.035) total hemocyte counts (THCs), response, showed median time death (by up 5 sooner) post A. injection conditions. Moreover, nearly twice as many lost at least one claw treatment groups, potentially increasing risk mortality due secondary infection. Together, results suggest that subadult americanus, influencing successful recruitment fishery.

Language: Английский

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Effects of ocean warming, eutrophication and salinity variations on the growth of habitat-forming macroalgae in estuarine environments

Acta Botanica Brasilica, Journal Year: 2020, Volume and Issue: 34(4), P. 662 - 672

Published: Dec. 1, 2020

Global change and coastal eutrophication are affecting macroalgae worldwide. We analyzed the effects of increased water temperature (25, 28 32 °C) on growth Bostrychia binderi montagnei in a range salinities (18, 24, 30, 36 42 PSU) through three independent multifactorial experiments. Both species had higher at 25 °C than (warming scenario projected by IPCC), suggesting negative effect ocean warming. The showed broad tolerance to tested, with PSU, as local adaptation strategy. Oligotrophic seawater significantly affected both because lowest was found this condition, whereas highest availability nutrients, which is probably estuaries nutrient-rich environments due continental runoff. High temperatures, low few nutrients interactive species. Our results show that warming can be detrimental studied macroalgae, tolerant eutrophication, B. being more sensitive binderi. also reinforce euryhaline characteristic genus Bostrychia.

Language: Английский

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The correlation between echinoderms diversity and physicochemical parameters in marine pollution: A case study of the Persian Gulf coastline

Marine Pollution Bulletin, Journal Year: 2024, Volume and Issue: 199, P. 115989 - 115989

Published: Jan. 2, 2024

Language: Английский

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