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PANGAEA tech-keyword 'Yangetal2016' (87 data sets)

Mostrando recursos 1 - 20 de 87

  1. Adaptation and acclimatization to ocean acidification in marine ectotherms: an in situ transplant experiment with polychaetes at a shallow CO2 vent system

    Calosi, Piero; Rastrick, S P S; Lombardi, Chiara; de Guzman, H J; Davidson, L; Jahnke, M; Giangrande, Adriana; Hardege, J D; Schulze, A; Spicer, John I; Gambi, Maria Cristina

  2. Distribution of sea urchins living near shallow water CO2 vents is dependent upon species acid-base and ion-regulatory abilities

    Calosi, Piero; Rastrick, S P S; Graziano, M; Thomas, S C; Baggini, Cecilia; Carter, H A; Hall-Spencer, Jason M; Milazzo, Marco; Spicer, John I

  3. Impacts of elevated CO2 on particulate and dissolved organic matter production: microcosm experiments using iron-deficient plankton communities in open subarctic waters

    Yoshimura, T; Suzuki, Koji; Kiyosawa, H; Ono, Tsuneo; Hattori, Hiroshi; Kuma, Kenshi; Nishioka, Jun
    Response of phytoplankton to increasing CO2 in seawater in terms of physiology and ecology is key to predicting changes in marine ecosystems. However, responses of natural plankton communities especially in the open ocean to higher CO2 levels have not been fully examined. We conducted CO2 manipulation experiments in the Bering Sea and the central subarctic Pacific, known as high nutrient and low chlorophyll regions, in summer 2007 to investigate the response of organic matter production in iron-deficient plankton communities to CO2 increases. During the 14-day incubations of surface waters with natural plankton assemblages in microcosms under multiple pCO2 levels, the...

  4. The effect of nitrate and phosphate availability on Emiliania huxleyi(NZEH) physiology under different CO2 scenarios

    Rouco, Mónica; Branson, O; Lebrato, Mario; Iglesias-Rodriguez, Debora
    Growth and calcification of the marine coccolithophorid Emiliania huxleyi is affected by ocean acidification and macronutrients limitation and its response varies between strains. Here we investigated the physiological performance of a highly calcified E. huxleyi strain, NZEH, in a multiparametric experiment. Cells were exposed to different CO2 levels (ranging from 250 to 1314 µatm) under three nutrient conditions [nutrient replete (R), nitrate limited (-N), and phosphate limited (-P)]. We focused on calcite and organic carbon quotas and on nitrate and phosphate utilization by analyzing the activity of nitrate reductase (NRase) and alkaline phosphatase (APase), respectively. Particulate inorganic (PIC) and organic...

  5. Phytoplankton responses and associated carbon cycling during shipboard carbonate chemistry manipulation experiments conducted around Northwest European shelf seas

    Richier, Sophie; Achterberg, Eric P; Dumousseaud, C; Poulton, Alex J; Suggett, David J; Tyrrell, Toby; Zubkov, Mikhail V; Moore, C M
    The ongoing oceanic uptake of anthropogenic carbon dioxide (CO2) is significantly altering the carbonate chemistry of seawater, a phenomenon referred to as ocean acidification. Experimental manipulations have been increasingly used to gauge how continued ocean acidification will potentially impact marine ecosystems and their associated biogeochemical cycles in the future; however, results amongst studies, particularly when performed on natural communities, are highly variable, which may reflect community/environment-specific responses or inconsistencies in experimental approach. To investigate the potential for identification of more generic responses and greater experimentally reproducibility, we devised and implemented a series (n = 8) of short-term (2-4 days) multi-level...

  6. Temperature and acidification variability reduce physiological performance in the intertidal zone porcelain crab Petrolisthes//cinctipes

    Paganini, Adam W; Miller, Nathan A; Stillman, Jonathon H
    We show here that increased variability of temperature and pH synergistically negatively affects the energetics of intertidal zone crabs. Under future climate scenarios, coastal ecosystems are projected to have increased extremes of low tide-associated thermal stress and ocean acidification-associated low pH, the individual or interactive effects of which have yet to be determined. To characterize energetic consequences of exposure to increased variability of pH and temperature, we exposed porcelain crabs, Petrolisthes cinctipes, to conditions that simulated current and future intertidal zone thermal and pH environments. During the daily low tide, specimens were exposed to no, moderate or extreme heating, and...

  7. Seawater carbonate chemistry and thermal tolerance of early development stages of the Antarctic urchin Sterechinus neumayeri under future ocean conditions of warming and acidification

    Kapsenberg, Lydia; Hofmann, Gretchen E

  8. Effects of ultraviolet radiation and CO2 increase on winter phytoplankton assemblages in a temperate coastal lagoon

    Domingues, Rita B; Guerra, Catia C; Barbosa, Ana B; Brotas, Vanda; Galvão, Helena M
    Increases in ultraviolet radiation (UVR) and CO2 affect phytoplankton growth and mortality in a variety of different ways. However, in situ responses of natural phytoplankton communities to climate change, as well as its effects on phytoplankton annual cycles, are still largely unknown. Although temperature and UVR have been increasing in temperate latitudes during winter, this season is still particularly neglected in climate change studies, being considered a non-active season regarding phytoplankton growth and production. Additionally, coastal lagoons are highly productive ecosystems and very vulnerable to climate change. This study aims, therefore, to evaluate the short-term effects of increased UVR and...

  9. EPOCA Svalbard 2010 mesocosm experiment: Microzooplankton community composition

    Aberle, Nicole; Schulz, Kai Georg; Stuhr, Annegret; Malzahn, Arne M; Ludwig, Andrea; Riebesell, Ulf

  10. Experiment: Study on the effects of near-future ocean acidification on marine yeasts: a microcosm approach

    Krause, Evamaria

  11. Structural and functional vulnerability to elevated pCO2 in marine benthic communities

    Christen, Nadja; Calosi, Piero; McNeill, C L; Widdicombe, Stephen
    The effect of elevated pCO2/low pH on marine invertebrate benthic biodiversity, community structure and selected functional responses which underpin ecosystem services (such as community production and calcification) was tested in a medium-term (30 days) mesocosm experiment in June 2010. Standardised intertidal macrobenthic communities, collected (50.3567°N, 4.1277°W) using artificial substrate units (ASUs), were exposed to one of seven pH treatments (8.05, 7.8. 7.6, 7.4, 7.2, 6.8 and 6.0). Community net calcification/dissolution rates, as well as changes in biomass, community structure and diversity, were measured at the end of the experimental period. Communities showed significant changes in structure and reduced diversity in...

  12. Seawater carbonate chemistry and calcification, mass and shed rate of tropical green algae species Halimeda, 2011

    Price, Nichole N; Hamilton, Scott L; Tootell, Jesse S; Smith, Jennifer E

  13. Seawater carbonate chemistry near Palmyra Atoll located in the Northern Line Island chain in the Central Pacific, 2011

    Price, Nichole N; Hamilton, Scott L; Tootell, Jesse S; Smith, Jennifer E

  14. Seawater carbonate chemistry and calcification rate during experiments with coral Stylophora pistillata, 2003

    Reynaud, Stéphanie; Leclercq, Nicolas; Romaine-Lioud, Samantha; Ferrier-Pagès, Christine; Jaubert, Jean; Gattuso, Jean-Pierre
    We show here that CO2 partial pressure (pCO2) and temperature significantly interact on coral physiology. The effects of increased pCO2 and temperature on photosynthesis, respiration and calcification rates were investigated in the scleractinian coral Stylophora pistillata. Cuttings were exposed to temperatures of 25°C or 28°C and to pCO2 values of ca. 460 or 760 muatm for 5 weeks. The contents of chlorophyll c2 and protein remained constant throughout the experiment, while the chlorophyll a content was significantly affected by temperature, and was higher under the 'high-temperature-high-pCO2' condition. The cell-specific density was higher at 'high pCO2' than at 'normal pCO2' (1.7...

  15. Ocean acidification and its potential effects on the early life-history of non-calcifying and calcifying echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) larvae, 2011

    Gonzalez Bernat, Maria Jose
    Ocean acidification, as a result of increased atmospheric CO2, has the potential to adversely affect the larval stages of many marine organisms and hence have profound effects on marine ecosystems. This is the first study of its kind to investigate the effects of ocean acidification on the early life-history stages of three echinoderms species, two asteroids and one irregular echinoid. Potential latitudinal variations on the effects of ocean acidification were also investigated by selecting a polar species (Odontaster validus), a temperate species (Patiriella regularis), and a tropical species (Arachnoides placenta). The effects of reduced seawater pH levels on the fertilization...

  16. Seawater carbonate chemistry echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) size during experiments, 2011

    Gonzalez Bernat, Maria Jose

  17. Seawater carbonate chemistry echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) survival during experiments, 2011

    Gonzalez Bernat, Maria Jose

  18. Seawater carbonate chemistry echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) survival during experiments, 2011

    Gonzalez Bernat, Maria Jose

  19. Seawater carbonate chemistry, nutrients, chlorophyll, and growth rate of Phaeocystis globosa (strain Pg G''A'') during experiments, 2011

    Hoogstraten, Astrid; Peters, M; Timmermans, Klaas R; de Baar, Hein J W

  20. Seawater carbonate chemistry and Atlantic cod, Gadus morhua tissue damage during experiments, 2012

    Frommel, Andrea Y; Maneja, Rommel H; Lowe, David J; Malzahn, Arne M; Geffen, Audrey J; Folkvord, Arild; Piatkowski, Uwe; Reusch, Thorsten B H; Clemmesen, Catriona

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