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  • Data  (3)
  • BIOACID; Biological Impacts of Ocean Acidification  (2)
  • Alkalinity, total; Aragonite saturation state; Benthos; Bicarbonate ion; BIOACID; Biological Impacts of Ocean Acidification; Calcification/Dissolution; Calcified area; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Carbonic anhydrase, activity; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); Corallina officinalis; Date; Electron transport rate; Fluorescence, maximum, without dark adaptation; Fluorescence, minimum, without dark adaptation; Fluorescence, yield at any given time; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gross oxygen evolution, per chlorophyll a; Group; Growth/Morphology; Growth rate; Incubation duration; Inorganic matter; Irradiance; Laboratory experiment; Macroalgae; Maximum photochemical quantum yield of photosystem II; Net oxygen evolution, per chlorophyll a; Non photochemical quenching; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Organic matter; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard error; Photochemical quenching; Plantae; Primary production/Photosynthesis; Replicate; Rhodophyta; Salinity; Single species; Species; Temperate; Temperature, water; Time of day; Treatment; Yield  (1)
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  • Data  (3)
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Keywords
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  • 1
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    Experiment: Ultraviolet radiation modulates the physiological responses of the calcified rhodophyte Corallina officinalis to elevated CO2 (2014)
    PANGAEA
    In:  Supplement to: Yildiz, Gamse; Hofmann, Laurie C; Bischof, Kai; Dere, Sükran (2013): Ultraviolet radiation modulates the physiological responses of the calcified rhodophyte Corallina officinalis to elevated CO2. Botanica Marina, 56(2), 161-168, https://doi.org/10.1515/bot-2012-0216
    Details
    Publication Date: 2023-02-24
    Description: Ocean acidification reduces the concentration of carbonate ions and increases those of bicarbonate ions in seawater compared with the present oceanic conditions. This altered composition of inorganic carbon species may, by interacting with ultraviolet radiation (UVR), affect the physiology of macroalgal species. However, very little is known about how calcareous algae respond to UVR and ocean acidification. Therefore, we conducted an experiment to determine the effects of UVR and ocean acidification on the calcified rhodophyte Corallina officinalis using CO2-enriched cultures with and without UVR exposure. Low pH increased the relative electron transport rates (rETR) but decreased the CaCO3 content and had a miniscule effect on growth. However, UVA (4.25 W m-2) and a moderate level of UVB (0.5 W m-2) increased the rETR and growth rates in C. officinalis, and there was a significant interactive effect of pH and UVR on UVR-absorbing compound concentrations. Thus, at low irradiance, pH and UVR interact in a way that affects the multiple physiological responses of C. officinalis differently. In particular, changes in the skeletal content induced by low pH may affect how C. officinalis absorbs and uses light. Therefore, the light quality used in ocean acidification experiments will affect the predictions of how calcified macroalgae will respond to elevated CO2.
    Keywords: BIOACID; Biological Impacts of Ocean Acidification
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Seagrass biofilm communities at a naturally CO2-rich vent at Papua New Guinea (2014)
    PANGAEA
    In:  Supplement to: Hassenrück, Christiane; Hofmann, Laurie C; Bischof, Kai; Ramette, Alban (2015): Seagrass biofilm communities at a naturally CO2-rich vent. Environmental Microbiology Reports, https://doi.org/10.1111/1758-2229.12282
    Details
    Publication Date: 2023-02-24
    Description: Seagrass meadows are a crucial component of tropical marine reef ecosystems. The seagrass plants are colonized by a multitude of epiphytic organisms that contribute to determining the ecological role of seagrasses. To better understand how environmental changes like ocean acidification might affect epiphytic assemblages, the microbial community composition of the epiphytic biofilm of Enhalus acroides was investigated at a natural CO2 vent in Papua New Guinea using molecular fingerprinting and next generation sequencing of 16S and 18S rRNA genes. Both bacterial and eukaryotic epiphytes formed distinct communities at the CO2-impacted site compared to the control site. This site-related CO2 effect was also visible in the succession pattern of microbial epiphytes. We further found an increased abundance of bacterial types associated with coral diseases at the CO2-impacted site (Fusobacteria, Thalassomonas) whereas eukaryotes such as certain crustose coralline algae commonly related to healthy reefs were less diverse. These trends in the epiphytic community of E. acroides suggest a potential role of seagrasses as vectors of coral pathogens and may support previous predictions of a decrease in reef health and prevalence of diseases under future ocean acidification scenarios.
    Keywords: BIOACID; Biological Impacts of Ocean Acidification
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Unknown
    Experiment: Physiological responses of the calcifying rhodophyte, Corallina officinalis (L.), to future CO2 levels (2012)
    PANGAEA
    In:  Supplement to: Hofmann, Laurie C; Yildiz, Gamse; Hanelt, D; Bischof, Kai (2011): Physiological responses of the calcifying rhodophyte, Corallina officinalis (L.), to future CO2 levels. Marine Biology, 159(4), 783-792, https://doi.org/10.1007/s00227-011-1854-9
    Details
    Publication Date: 2024-03-15
    Description: Future atmospheric CO2 levels will most likely have complex consequences for marine organisms, particulary photosynthetic calcifying organisms. Corallina officinalis L. is an erect calcifying macroalga found in the inter- and subtidal regions of temperate rocky coastlines and provides important substrate and refugia for marine meiofauna. The main goal of the current study was to determine the physiological responses of C. officinalis to increased CO2 concentrations expected to occur within the next century and beyond. Our results show that growth and production of inorganic material decreased under high CO2 levels, while carbonic anhydrase activity was stimulated and negatively correlated to algal inorganic content. Photosynthetic efficiency based on oxygen evolution was also negatively affected by increased CO2. The results of this study indicate that C. officinalis may become less competitive under future CO2 levels, which could result in structural changes in future temperate intertidal communities.
    Keywords: Alkalinity, total; Aragonite saturation state; Benthos; Bicarbonate ion; BIOACID; Biological Impacts of Ocean Acidification; Calcification/Dissolution; Calcified area; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Carbonic anhydrase, activity; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); Corallina officinalis; Date; Electron transport rate; Fluorescence, maximum, without dark adaptation; Fluorescence, minimum, without dark adaptation; Fluorescence, yield at any given time; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gross oxygen evolution, per chlorophyll a; Group; Growth/Morphology; Growth rate; Incubation duration; Inorganic matter; Irradiance; Laboratory experiment; Macroalgae; Maximum photochemical quantum yield of photosystem II; Net oxygen evolution, per chlorophyll a; Non photochemical quenching; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Organic matter; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard error; Photochemical quenching; Plantae; Primary production/Photosynthesis; Replicate; Rhodophyta; Salinity; Single species; Species; Temperate; Temperature, water; Time of day; Treatment; Yield
    Type: Dataset
    Format: text/tab-separated-values, 13244 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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