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  • 1
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    Zooplankton‐derived dissolved organic matter composition and its bioavailability to natural prokaryotic communities (2022)
    De Corte, Daniele ; Varela, Marta M. ; Louro, Angeles M. ; [et al.]
    John Wiley & Sons, Inc. | Hoboken, USA
    Details
    Publication Date: 2023-12-14
    Description: Zooplankton grazing onphytoplankton promotes the release of particulate and dissolved organic matter (DOM) into the water column and therefore plays a key role in organic matter cycling in aquatic systems. Prokaryotes are the main DOM consumers in the ocean by actively remineralizing and transforming it, contributing to its molecular diversification. To explore the molecular composition of zooplankton‐derived DOM and its bioavailability to natural prokaryotic communities, the DOM generated by a mixed zooplankton community in the coastal Atlantic off Spain was used as substrate for a natural prokaryotic community and monitored over a ~ 5‐d incubation experiment. The molecular composition of solid‐phase extracted DOM was characterized via Fourier‐transform ion cyclotron resonance mass spectrometry. After ~ 4 d in the zooplankton‐derived DOM amended incubation, the prokaryotic community demonstrated a 17‐fold exponential increase in cell number. The prokaryotic growth resulted in a reduction in bulk dissolved organic carbon concentration and the zooplankton‐derived DOM was considerably transformed at molecular and bulk elemental levels over the incubation period. The C : N ratio (calculated from the obtained molecular formulae) increased while the functional diversity decreased over the incubation time. In addition, molecular indices pointed to a reduced bioavailability of DOM at the end of the experiment. These findings show that zooplankton excreta are a source of labile organic matter that is quickly metabolized by the prokaryotic community. Therefore, a fraction of carbon is shunted from transfer to secondary consumers similarly to the viral shunt, suggesting that the zooplankton–prokaryotic interactions play an important role in the ocean's carbon cycle.
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Description: Xunta de Galicia http://dx.doi.org/10.13039/501100010801
    Keywords: ddc:577.7 ; Spain ; coastal Atlantic ; zooplankton–prokaryotic interactions ; ocean’s carbon cycle
    Language: English
    Type: doc-type:article
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    CITATION GEO-LEO
  • 2
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    Time series of hydrographic, biogeochemical and plankton variables for a shelf station off A Coruña (NW Spain): 1990-2018 (2020)
    PANGAEA
    Details
    Publication Date: 2024-03-18
    Description: Monthly series of hydrographic (temperature, salinity) and biogeochemical variables (nutrients, dissolved oxygen, particulate organic matter, chlorophyll, primary production), and zooplankton taxa abundance and biomass (dry weight) collected at one shelf station for various periods between 1990 and 2018 at A Coruña (NW Spain). These series are part of the long-term observational project RADIALES (Instituto Español de Oceanografía, IEO, Spain).
    Keywords: Abundance; Adaptação Costeira às alterações climáticas: conhecer os riscos e aumentar a resiliência; Biomass; chlorophyll; MarRisk; NE Atlantic; nutrients; NW Spain; RADIALES; Salinity; seRies temporAles De oceanografIA en eL norte de ESpaña; Temperature; Upwelling; Zooplankton
    Type: Dataset
    Format: application/zip, 3 datasets
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    DATA PANGAEA
  • 3
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    Inorganic nutrient concentrations in seawater during a multi-stressor ex-situ aquarium experiment with the cold-water coral Dendrophyllia cornigera (2023)
    PANGAEA
    Details
    Publication Date: 2024-03-18
    Description: A 9-month aquarium experiment with the cold-water Dendrophyllia cornigera was conducted to investigate the single and combined effects of warming, acidification and deoxygenation on its ecophysiological response. The experiment took place at the Aquarium finisterrae (A Coruña, Spain) between 2022-05-06 and 2023-02-24. Treatment values for each parameter (current in situ vs. climate change) were: 12 °C and 15 °C (temperature); ~7.99 and 7.69 (pH); ~8.63 mg/L and 6.45 mg/L (dissolved oxygen concentration). A total of eight treatments (with 3 replicates each, 5 L aquaria) were set up. Concentrations of dissolved nitrates, nitrite, silicate and phosphate were analysed from each experimental aquaria after one, six and nine months. Inorganic nutrient concentrations in seawater were determined using a SFA (Segmented Flow Autoanalyzer) (Aminot & Kérouel, 2007) with a SEAL Analytical QuAAtro analyzer using established colorimetric methods (Hydes et al. 2010 & Becker et al. 2020). RMNs (Reference Material for nutrients in seawater) with different concentration ranges were used for quality control and accuracy of our analysis. Low nutrient seawater (surface seawater filtered and aged) is also used to control low nutrient concentrations.
    Keywords: Colorimetric using QuAAtro39 AA (Seal Analytical); DATE/TIME; Dendrophyllia_cornigera_Coral_Bycatch_A_Coruna; experimental data; Experiment duration; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Laboratory experiment; NE Atlantic; Nitrate and Nitrite; Nitrite; North Atlantic Ocean; nutrients; NW Spain; Phosphate; Replicate; Salinity; Silicate; Species; Species, unique identification (Semantic URI); Species, unique identification (URI); Treatment; Treatment: temperature; Type of study; WTW Multi Set 350i multiparameter probe
    Type: Dataset
    Format: text/tab-separated-values, 864 data points
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    DATA PANGAEA
  • 4
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    Time series of hydrographic, chemical and primary production variables for a shelf station off A Coruña (NW Spain): 2017-2018 (2020)
    PANGAEA
    Details
    Publication Date: 2024-03-18
    Description: Water column discrete observations of temperature, salinity, density, irradiance, dissolved nutrients (nitrate, nitrite, phosphate, ammonium, silicate), oxygen, chlorophyll-a, primary production (carbon uptake) rates, and particulate organic carbon and nitrogen from samples collected monthly at a shelf station off A Coruña (NW Spain) between 2017 and 2018. These series are part of the long-term observational project RADIALES (Instituto Español de Oceanografía, IEO, Spain).
    Keywords: Adaptação Costeira às alterações climáticas: conhecer os riscos e aumentar a resiliência; Ammonium; Bottle, Niskin; Carbon, organic, particulate; Carbon/Nitrogen ratio; Chlorophyll a; Colorimetry, flow-segmented (Grasshoff et al. 1983); CTD, Sea-Bird, SBE 25 SEALOGGER; DATE/TIME; Density, sigma-theta (0); DEPTH, water; E2CO; Galicia Margin; MarRisk; NE Atlantic; NIS; Nitrate; Nitrite; Nitrogen, organic, particulate; nutrients; NW Spain; Oxygen; Oxygen saturation; Phosphate; primary production; Primary production of carbon per hour; RADIALES; Radiation, photosynthetically active; Salinity; seRies temporAles De oceanografIA en eL norte de ESpaña; Silicate; Temperature; Temperature, water; Upwelling; Winkler titration (Parsons et al. 1984)
    Type: Dataset
    Format: text/tab-separated-values, 2499 data points
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    DATA PANGAEA
  • 5
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    Skeletal growth rates of the cold-water coral Dendrophyllia cornigera from a long-term multi-stressor experiment (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-23
    Description: A 9-month aquarium experiment with the cold-water Dendrophyllia cornigera was conducted to investigate the single and combined effects of warming, acidification and deoxygenation on its ecophysiological response. The experiment took place at the Aquarium finisterrae (A Coruña, Spain) between 2022-05-06 and 2023-02-24. Treatment values for each parameter (current in situ vs. climate change) were: 12 °C and 15 °C (temperature); ~7.99 and 7.69 (pH); ~8.63 mg/L and 6.45 mg/L (dissolved oxygen concentration). A total of eight treatments (with 3 replicates each, 5 L aquaria) were set up. Dry mass of the coral nubbins (3 per experimental aquarium) was assessed by means of the buoyant weight technique (Jokiel et al. 1978, Davies, 1989), using an analytical balance (OHAUS AX124, precision 0.1 mg). The dry mass was calculated considering the nubbin net weight in water, the water density and the skeletal density of D. cornigera (2.63 g/cm3; Movilla et al. 2014). Measurements were performed just once the acclimation time finished and after 2 , 4, 6 and 9 months under the experimental conditions. Skeletal growth rates were calculated as the slope of the linear regression between the logarithmically transformed dry mass and the experimental time (%/day) (Orejas et al. 2011).
    Keywords: Buoyant weighing technique according to Davies (1989); Dendrophyllia_cornigera_Coral_Bycatch_A_Coruna; Dendrophyllia cornigera; Dendrophyllia cornigera, skeletal growth rate; Experimental treatment; growth; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Laboratory experiment; Multiple stressors; NE Atlantic; North Atlantic Ocean; NW Spain; Replicate; Species; Species, unique identification (Semantic URI); Species, unique identification (URI); Specimen identification; Type of study
    Type: Dataset
    Format: text/tab-separated-values, 576 data points
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    DATA PANGAEA
  • 6
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    Prokariotic abundances during a multi-stressor aquaria experiment with the cold-water coral Dendrophyllia cornigera (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-19
    Description: A 9-month aquarium experiment with the cold-water Dendrophyllia cornigera was conducted to investigate the single and combined effects of warming, acidification and deoxygenation on its ecophysiological response. The experiment took place at the Aquarium finisterrae (A Coruña, Spain) between 2022-05-06 and 2023-02-24. Treatment values for each parameter (current in situ vs. climate change) were: 12 °C and 15 °C (temperature); ~7.99 and 7.69 (pH); ~8.63 mg/L and 6.45 mg/L (dissolved oxygen concentration). A total of eight treatments (with 3 replicates each, 5 L aquaria) were set up. Prokaryotes were quantified by flow citometry (CytoFLEXflex S, Beckman Coulter) as previously described by Gasol et al. (1999) with our own adjustment of the scatter settings to more accurately resolve these cells with the new CytoFLEX flow cytometry technology. Measurements were performed every month from different parts of the aquaria setup: the input seawater, the reservoir tank (after the filtration of seawater to 5 µm and before the UV lamp) and every experimental aquaria.
    Keywords: Atlantic Ocean; Comment; DATE/TIME; Dendrophyllia_Bycatch; Experimental treatment; Experiment duration; Flow cytometer, Beckman Coulter, CytoFLEX S (N-V-B-R); flow cytometry; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Laboratory experiment; NE Atlantic; NW Spain; Prokaryotes; prokaryotic abundance; Replicate; Species; Species, unique identification (Semantic URI); Species, unique identification (URI); Type of study
    Type: Dataset
    Format: text/tab-separated-values, 1260 data points
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    DATA PANGAEA
  • 7
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    Water physico-chemical variables during a long-term multi-stressor aquarium experiment with the cold-water coral Dendrophyllia cornigera (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-19
    Description: A 9-month aquarium experiment with the cold-water Dendrophyllia cornigera was conducted to investigate the single and combined effects of warming, acidification and deoxygenation on its ecophysiological response. The experiment took place at the Aquarium finisterrae (A Coruña, Spain), from the 6th of May 2022 to the 24th of February 2023. Treatment values for each parameter (current in situ vs. climate change) were: 12 °C and 15 °C (temperature); ~7.99 and 7.69 (pH); ~8.63 mg/L and 6.45 mg/L (dissolved oxygen concentration). A total of eight treatments (with 3 replicates each, 5 L aquaria) were set up. This dataset contains the registered values for temperature, pH, DO (% air saturation and mg/L) and sainity from the experimental aquarium over the course of the experiment. Temperature and DO were daily measured with a YSI ProODO dissolved oxygen instrument. Salinity was weekly assessed with a WTW 350i multiparameter device equipped with a ConOx probe. Measurements for pH were performed every 1 – 2 months. Samples for pH were directly collected on cylindrical 10 cm cuvettes and analysed on daily basis. After being thermostated at 25ºC, samples were measured using a manual spectrophotometrical procedure with a Sigma Aldrich impure indicator (Clayton and Byrne, 1993). The uncertainty of pH is about 0.005 pH units.
    Keywords: Atlantic Ocean; DATE/TIME; Dendrophyllia_Bycatch; Experimental treatment; Experiment duration; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Laboratory experiment; NE Atlantic; NW Spain; Oxygen, dissolved; Oxygen saturation; Oxygen sensor, YSI ProODO; pH; Replicate; Salinity; Species; Species, unique identification (Semantic URI); Species, unique identification (URI); Spectrophotometric; Treatment: temperature; Type of study; WTW Multi Set 350i multiparameter probe
    Type: Dataset
    Format: text/tab-separated-values, 51526 data points
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    DATA PANGAEA
  • 8
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    Carbonate chemistry of an aquaria setup during a multi-stressor experiment with the cold-water coral Dendrophyllia cornigera (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-19
    Description: A 9-month aquarium experiment with the cold-water Dendrophyllia cornigera was conducted to investigate the single and combined effects of warming, acidification and deoxygenation on its ecophysiological response. The experiment took place at the Aquarium finisterrae (A Coruña, Spain) between 2022-05-06 and 2023-02-24. Treatment values for each parameter (current in situ vs. climate change) were: 12 °C and 15 °C (temperature); ~7.99 and 7.69 (pH); ~8.63 mg/L and 6.45 mg/L (dissolved oxygen concentration). A total of eight treatments (with 3 replicates each, 5 L aquaria) were set up. Measurements for pH and total alkalinity (TA) were performed on seawater samples from all the experimental aquaria every 1 – 2 months. Samples for pH were directly collected on cylindrical 10 cm cuvettes and analysed on daily basis. After being thermostated at 25ºC, samples were measured using a manual spectrophotometrical procedure with a Sigma Aldrich impure indicator (Clayton and Byrne, 1993). TA was measured following the double end point potentiometric technique by Pérez and Fraga (1987a) and Pérez et al. (2000). Measurements of Certified Reference Material (Dickson's lab, SIO) were performed in order to control the accuracy of the TA measurements. The uncertainty of TA and pH is about 3 μmol/kg and 0.005 pH units, respectively. In situ additional CO2 system variables were calculated using the R package seacarb (Gattuso et al. 2023) using in situ temperature, salinity, measured pH and TA, the dissociation constants of carbonic acid in seawater (K1 and K2) by Lueker et al. (2000), the equilibrium constant of hydrogen fluoride by Perez and Fraga (1987b), the concentration of total boron by Uppström (1974) formulation, and the stability constant of hydrogen sulphate by Dickson (1990). Mean values for the concentration of silicate and phosphate on the aquaria experiments were used in the CO2 calculations, respectively, mean (and standard) deviations as 2.1 (0.4) and 0.31 (0.03) μmol/kg.
    Keywords: Alkalinity, total; Aragonite saturation state; Atlantic Ocean; Bicarbonate ion; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate chemistry; Carbonate ion; Carbon dioxide; DATE/TIME; Dendrophyllia_Bycatch; Experimental treatment; Experiment duration; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Laboratory experiment; NE Atlantic; NW Spain; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Potentiometric titration; Replicate; Salinity; Species; Species, unique identification (Semantic URI); Species, unique identification (URI); Spectrophotometric; Treatment: temperature; Type of study; WTW Multi Set 350i multiparameter probe
    Type: Dataset
    Format: text/tab-separated-values, 2822 data points
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    DATA PANGAEA
  • 9
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    Water parameters registered over 24 hours by a Raspberry-based controller during a multi-stressor aquarium experiment (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-19
    Description: A 9-month aquarium experiment with the cold-water Dendrophyllia cornigera was conducted to investigate the single and combined effects of warming, acidification and deoxygenation on its ecophysiological response. The experiment took place at the Aquarium finisterrae (A Coruña, Spain) between 2022-05-06 and 2023-02-24. Treatment values for each parameter (current in situ vs. climate change) were: 12 °C and 15 °C (temperature); ~7.99 and 7.69 (pH); ~8.63 mg/L and 6.45 mg/L (dissolved oxygen concentration). A total of eight treatments (with 3 replicates each, 5 L aquaria) were set up. Raspberry-based controllers were set to modify and monitor the water temperature, pH and dissolved oxygen in every treatment. Values for temperature (ºC), pH (NBS scale) and oxygen (% air saturation) were registered every 15 minutes in a database. The parameters were measured using PT100 temperature sensors, and Atlas Scientific Lab Grade pH and Dissolved Oxygen sensors. Every set of sensors was placed on each header tank, corresponding to each treatment (8 in total). Parameter setpoint values for each header tank were finely adjusted on the controller to ensure the treatment target values on each experimental aquaria. Oxygen sensors from treatments with ambient oxygen (~8.63 mg/L) were removed from the system due to calibration issues. Here, an example of the results for temperature, pH and oxygen for every header tank over 24 hours on 31st of December 2022 is presented. Values for pH (total scale) and dissolved oxygen (mg/L) were calculated using AquaEnv (Hofmann et al. 2010) and respR (Harianto et al. 2019) R packages, respectively, using the in situ temperature and salinity (35.1).
    Keywords: Atlantic Ocean; Calculated using AquaEnv R package; Calculated using respR R package; DATE/TIME; Dendrophyllia_Bycatch; Experimental treatment; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Laboratory experiment; NE Atlantic; NW Spain; Oxygen, dissolved; Oxygen saturation; Oxygen sensor, Atlas Scientific Lab grade; pH; pH sensor, Atlas Scientific, lab grade; Temperature, water; Thermometer, PT100; Type of study
    Type: Dataset
    Format: text/tab-separated-values, 3984 data points
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    DATA PANGAEA
  • 10
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    Respiration rates of the cold-water coral Dendrophyllia cornigera from a long-term multi-stressor experiment (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-19
    Description: A 9-month aquarium experiment with the cold-water Dendrophyllia cornigera was conducted to investigate the single and combined effects of warming, acidification and deoxygenation on its ecophysiological response. The experiment took place at the Aquarium finisterrae (A Coruña, Spain) between 2022-05-06 and 2023-02-24. Treatment values for each parameter (current in situ vs. climate change) were: 12 °C and 15 °C (temperature); ~7.99 and 7.69 (pH); ~8.63 mg/L and 6.45 mg/L (dissolved oxygen concentration). A total of eight treatments (with 3 replicates each, 5 L aquaria) were set up. Respiration rates from each nubbin (3 per aquarium) were assessed after 6 and 9 months under the experimental conditions by means of closed-cell incubations. Oxygen consumption was calculated by measuring the dissolved oxygen concentration of the seawater inside the chamber using an optical oxygen sensor (YSI ProODO) at the beginning and at the end of the incubation time (24 h incubation). Dry mass (g) of the coral nubbins was assessed by means of the buoyant weight technique (Jokiel et al. 1978, Davies, 1989), using an analytical balance (OHAUS AX124, precision 0.1 mg). Tissue surface area (cm2) was assessed on virtual 3D models of each nubbin at the time when the measurements were conducted. Respiration rates were normalised by dry mass and by tissue surface area.
    Keywords: Dendrophyllia_cornigera_Coral_Bycatch_A_Coruna; Dendrophyllia cornigera; Dendrophyllia cornigera, dry mass; Dendrophyllia cornigera, respiration rate, oxygen; Dendrophyllia cornigera, respiration rate, oxygen, per dry mass; Dendrophyllia cornigera, surface area; Experimental treatment; Experiment duration; High precision balance, OHAUS, AX124; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Laboratory experiment; Multiple stressors; NE Atlantic; North Atlantic Ocean; NW Spain; Oxygen sensor, YSI ProODO; Photogrammetry from 3D reconstruction; Replicate; Respiration; Species; Species, unique identification (Semantic URI); Species, unique identification (URI); Specimen identification; Type of study
    Type: Dataset
    Format: text/tab-separated-values, 1722 data points
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    DATA PANGAEA
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