GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 2020-2024  (16)
  • 2023  (13)
  • 2022  (3)
Document type
Keywords
Publisher
Years
  • 2020-2024  (16)
Year
  • 1
    facet.materialart.
    Unknown
    KOSMOS 2018 Gran Canaria mesocosm study on artificial upwelling: 14C primary production (2023)
    PANGAEA
    Details
    Publication Date: 2023-08-15
    Description: Size fractionated primary productivity rate measurements through 14C radioisotope incorporation rates from a KOSMOS mesocosm experiment carried out in the frame work of the Ocean Artificial Upwelling project. The experiment was performed in the North-East Atlantic Ocean off the coast of Gran Canaria in autumn 2018 and lasted for 39 days. In this study we investigated the effect of different intensities of artificial upwelling combined with two upwelling modes (recurring additions versus one singular addition) on the phytoplankton community. Data shown includes production rates of dissolved organic carbon, particulate organic carbon in 3 size fractions (0.2-2 µm, 2-20 µm, 〉20 µm) and total organic carbon.
    Keywords: 14C incorporation; 14C-POC; artificial upwelling; Calculated; Canarias Sea; carbon sequestration; Day of experiment; Depth, water, experiment, bottom/maximum; Depth, water, experiment, top/minimum; Event label; Field experiment; Food web; KOSMOS_2018; KOSMOS_2018_Mesocosm-A; KOSMOS_2018_Mesocosm-M1; KOSMOS_2018_Mesocosm-M2; KOSMOS_2018_Mesocosm-M3; KOSMOS_2018_Mesocosm-M4; KOSMOS_2018_Mesocosm-M5; KOSMOS_2018_Mesocosm-M6; KOSMOS_2018_Mesocosm-M7; KOSMOS_2018_Mesocosm-M8; KOSMOS_2018_Mesocosm-M9; KOSMOS Gran Canaria; MESO; mesocosm experiment; Mesocosm experiment; Mesocosm label; Ocean Artificial Upwelling; Ocean-artUp; Phytoplankton; primary production; Primary production of carbon, organic, dissolved; Primary production of carbon, organic, dissolved, standard deviation; Primary production of carbon, organic, particulate; Primary production of carbon, organic, total; Sampling date/time, experiment; Treatment; Type of study
    Type: Dataset
    Format: text/tab-separated-values, 3342 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    KOSMOS mesocosm experiment Gran Canaria 2019 on testing the effect of nutrient composition (Si:N) during artificial upwelling: primary production, flow cytometry, photophysiology, internal nutrient storage and diatoms (2023)
    PANGAEA
    Details
    Publication Date: 2024-01-29
    Description: In this study we investigated the effect of artificial upwelling with different Si:N ratios on a natural oligotrophic plankton community. Data on primary production, flow cytometry, photophysiology, internal nutrient storage, diatom size, diatom silicification and diatom carbon density from the mesocosms experiment conducted on the Canary Islands in autumn 2019. Values are depth-integrated averages in (mostly) 2-days intervals over the course of 33 days. The upwelling treatment started on day 6. All samples were depth integrated (0-2.5m). Oxygen production and respiration rates were measured through incubations and Winkler titrations. Flow cytometry and photophysiology samples were measured fresh. Parameters used for diatom per capita size, silicification and carbon density measurements were taken from the following published datasets on the same experiment: https://doi.org/10.1594/PANGAEA.954852 and https://doi.org/10.1594/PANGAEA.951417
    Keywords: artificial upwelling; Canarias Sea; carbon dioxide removal; CDRmare; DAM CDRmare - Test-ArtUp: Road testing ocean artificial upwelling; DATE/TIME; Day of experiment; DEPTH, water, experiment; Diatom, cell biovolume; Diatom carbon density; diatoms; Diatoms, biogenic silicate, per cell; Electron transport rate; Event label; Field experiment; Flow cytometry; GC2019; Gross community production/respiration rate, oxygen, ratio; Gross community production of oxygen; KOSMOS; KOSMOS_2019; KOSMOS_2019_Mesocosm-M1; KOSMOS_2019_Mesocosm-M2; KOSMOS_2019_Mesocosm-M3; KOSMOS_2019_Mesocosm-M4; KOSMOS_2019_Mesocosm-M5; KOSMOS_2019_Mesocosm-M6; KOSMOS_2019_Mesocosm-M7; KOSMOS_2019_Mesocosm-M8; KOSMOS Gran Canaria; Maximum photochemical quantum yield of photosystem II; MESO; mesocosm experiment; Mesocosm experiment; Mesocosm label; Microplankton; Microplankton, forward scatter, per cell; Microplankton, red fluorescence, per cell; Microplankton, total forward scatter; Microplankton, total red fluorescence; Nanoeukaryotes; Nanoplankton, forward scatter, per cell; Nanoplankton, red fluorescence, per cell; Nanoplankton, total forward scatter; Nanoplankton, total red fluorescence; negative emission technology; Net community production of oxygen; Nitrate; Nitrite; Ocean Artificial Upwelling; Ocean-artUp; ocean fertilization; Phase description; Phosphate; photophysiology; Phytoplankton; Picoeukaryotes; plankton community; Research Mission of the German Marine Research Alliance (DAM): Marine carbon sinks in decarbonisation pathways; Respiration rate, oxygen, community; Si:N; Silicate; silicic acid; Sum; Synechococcus; Test-ArtUp; Treatment; Type of study
    Type: Dataset
    Format: text/tab-separated-values, 4925 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 3
    facet.materialart.
    Unknown
    KOSMOS mesocosm experiment Gran Canaria 2019 on testing the effect of nutrient composition (Si:N) during artificial upwelling: export flux and sinking particle properties (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Export data from the mesocosm experiment conducted in the Canary Islands in autumn 2019. Sinking matter was collected in 2-days intervals over the course of 33 days from the mesocosm sediment traps (4 m depth). Sediment samples were processed and subsampled for duplicate measurements of particulate organic carbon (POC), nitrogen (PON), phosphorus (POP) and biogenic silica (BSi). Elemental mass fluxes in µmol L-1 were calculated by normalizing to the mesocosm volume. They were then either normalized to the time between sample collection (48 h) to obtain daily mass fluxes (µmol L-1 d-1), or added up to obtain cumulative mass fluxes (µmol L-1). Another set of sediment subsamples was analyzed for particle sinking velocities, sizes and porosities (bidaily) and microbial remineralization rates (every 4 days).
    Keywords: AQUACOSM; artificial upwelling; Biogenic silica, flux, cumulative; Biogenic silica, flux per day; Biogenic silica, weight fraction; Canarias Sea; Carbon, organic, particulate, flux, cumulative; Carbon, organic, particulate, flux per day; Carbon/Nitrogen, molar ratio; carbon dioxide removal; CDRmare; DAM CDRmare - Test-ArtUp: Road testing ocean artificial upwelling; DATE/TIME; Day of experiment; DEPTH, water, experiment; diatoms; Equivalent spherical diameter; Event label; GC2019; KOSMOS; KOSMOS_2019; KOSMOS_2019_Mesocosm-M1; KOSMOS_2019_Mesocosm-M2; KOSMOS_2019_Mesocosm-M3; KOSMOS_2019_Mesocosm-M4; KOSMOS_2019_Mesocosm-M5; KOSMOS_2019_Mesocosm-M6; KOSMOS_2019_Mesocosm-M7; KOSMOS_2019_Mesocosm-M8; KOSMOS Gran Canaria; MESO; Mesocosm experiment; Mesocosm label; negative emission technology; Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean; Nitrogen, organic, particulate, flux, cumulative; Nitrogen, organic, particulate, flux per day; Nitrogen/Phosphorus, molar ratio; Ocean Artificial Upwelling; Ocean-artUp; ocean fertilization; Particle porosity; Phase description; Phosphorus, organic, particulate, flux, cumulative; Phosphorus, organic, particulate, flux per day; Remineralisation rate of carbon per day; Research Mission of the German Marine Research Alliance (DAM): Marine carbon sinks in decarbonisation pathways; Si:N; silicic acid; Silicon/Nitrogen, molar ratio; Sinking velocity; Size fraction 100-250 µm; Size fraction 250-1000 µm; Size fraction 40-100 µm; Test-ArtUp; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 3164 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 4
    facet.materialart.
    Unknown
    KOSMOS mesocosm experiment Gran Canaria 2019 on testing the effect of nutrient composition (Si:N) during artificial upwelling: phytoplankton microscopy (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Abundance and biovolume data of the community of larger phytoplankton from the mesocosm experiment conducted in the Canary Islands in autumn 2019. Depth-integrated (0-2.5m) water samples were taken in 2-days intervals over the course of 33 days and autotrophic taxa assessed to the lowest taxonomic level possible using Utermöhl microscopy. Only taxa larger than approx. 〉5 µm could be considered with this method. Biovolume was calculated based on geometrical measurements (dominant taxa) or the literature (rare taxa). Carbon biomass estimates were purposefully not provided, as the standard literature conversion factors from biovolume to carbon biomass did not apply to many of our samples, likely due to low carbon density within cells. Predominantly mixotrophic or heterotrophic taxa are not provided in this dataset. The upwelling treatment started on day 6. Methodological details in Goldenberg et al. (doi:10.3389/fmars.2022.1015188).
    Keywords: Amphora sp.; Amphora sp., biovolume; AQUACOSM; artificial upwelling; Calculated; Canarias Sea; carbon dioxide removal; CDRmare; Cerataulina pelagica; Cerataulina pelagica, biovolume; Chaetoceros cf. aequatorialis; Chaetoceros cf. aequatorialis, biovolume; Chaetoceros cf. compressus; Chaetoceros cf. compressus, biovolume; Chaetoceros cf. curvisetus; Chaetoceros cf. curvisetus, biovolume; Chaetoceros cf. lauderi; Chaetoceros cf. lauderi, biovolume; Chaetoceros cf. lorenzianus; Chaetoceros cf. lorenzianus, biovolume; Chaetoceros cf. tenuissimus; Chaetoceros cf. tenuissimus, biovolume; Chaetoceros decipiens; Chaetoceros decipiens, biovolume; Chaetoceros densus; Chaetoceros densus, biovolume; Chrysochromulina sp.; Chrysochromulina sp., biovolume; Climacodium cf. frauenfeldianum; Climacodium cf. frauenfeldianum, biovolume; Coccolithophoridae, biovolume; Coccolithophoridae, total; Coscinodiscus cf. pavillardii; Coscinodiscus cf. pavillardii, biovolume; Coscinodiscus sp.; Coscinodiscus sp., biovolume; Cylindrotheca closterium; Cylindrotheca closterium, biovolume; Cylindrotheca sp.; Cylindrotheca sp., biovolume; Dactyliosolen cf. blavyanus; Dactyliosolen cf. blavyanus, biovolume; Dactyliosolen cf. fragilissimus; Dactyliosolen cf. fragilissimus, biovolume; DAM CDRmare - Test-ArtUp: Road testing ocean artificial upwelling; DATE/TIME; Day of experiment; diatoms; Diatoms; Diatoms, biovolume; Dictyocha fibula; Dictyocha fibula, biovolume; Diploneis sp.; Diploneis sp., biovolume; Event label; Flagellates; Flagellates, biovolume; Flagellates indeterminata, oval; Flagellates indeterminata, oval, biovolume; GC2019; Guinardia delicatula; Guinardia delicatula, biovolume; Guinardia striata; Guinardia striata, biovolume; Hemiaulus cf. sinensis; Hemiaulus cf. sinensis, biovolume; KOSMOS; KOSMOS_2019; KOSMOS_2019_Mesocosm-M1; KOSMOS_2019_Mesocosm-M2; KOSMOS_2019_Mesocosm-M3; KOSMOS_2019_Mesocosm-M4; KOSMOS_2019_Mesocosm-M5; KOSMOS_2019_Mesocosm-M6; KOSMOS_2019_Mesocosm-M7; KOSMOS_2019_Mesocosm-M8; KOSMOS Gran Canaria; Leptocylindrus danicus; Leptocylindrus danicus, biovolume; Leptocylindrus minimus; Leptocylindrus minimus, biovolume; Licmophora sp.; Licmophora sp., biovolume; MESO; Mesocosm experiment; Mesocosm label; Microscopy; Minutocellus polymorphus; Minutocellus polymorphus, biovolume; negative emission technology; Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean; Nitzschia cf. acicularis; Nitzschia cf. acicularis, biovolume; Number of taxa; Ocean Artificial Upwelling; Ocean-artUp; ocean fertilization; Phaeocystis cf. globosa; Phaeocystis cf. globosa, biovolume; Phaeocystis sp.; Phaeocystis sp., biovolume; Phase description; Phytoplankton, biovolume; Phytoplankton, total; Pielou evenness index; plankton community; Pleurosigma sp.; Pleurosigma sp., biovolume; Proboscia sp.; Proboscia sp., biovolume; Pseudo-nitzschia delicatissima; Pseudo-nitzschia delicatissima, biovolume; Pseudo-nitzschia pungens; Pseudo-nitzschia pungens, biovolume; Pseudo-nitzschia sp.; Pseudo-nitzschia sp., biovolume; Pseudo-nitzschia subcurvata; Pseudo-nitzschia subcurvata, biovolume; Research Mission of the German Marine Research Alliance (DAM): Marine carbon sinks in decarbonisation pathways; Rhizosolenia cf. imbricata; Rhizosolenia cf. imbricata, biovolume; Rhizosolenia cf. setigera; Rhizosolenia cf. setigera, biovolume; Rhizosolenia sp.; Rhizosolenia sp., biovolume; Shannon Diversity Index; Si:N; silicic acid; Skeletonema sp.; Skeletonema sp., biovolume; Striatella cf. unipunctata; Striatella cf. unipunctata, biovolume; Sum; Test-ArtUp; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 14416 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 5
    facet.materialart.
    Unknown
    KOSMOS mesocosm experiment Gran Canaria 2019 on testing the effect of nutrient composition (Si:N) during artificial upwelling: microzooplankton, mesozooplankton and toxins (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Microzooplankton (microZP, protists) and mesozooplankton (mesoZP, metazoans) abundances and biomass as well as presence of domoic acid (DA, phycotoxin) during the mesocosm experiment in the Canary Islands in autumn 2019. Depth-integrated (0-2.5m) water samples were taken over the course of 33 days, in 2-day intervals for microZP and mesoZP and 4-day intervals for DA. MicroZP was assessed by Utermöhl light microscopy and its biomass estimated using biovolume to carbon conversion factors from the literature. MesoZP samples were split into three size fractions (55-200, 200-500 and 〉500 µm), preserved with 70% ethanol and assessed under a stereo microscope. For biomass, mesoZP were measured in an element analyser. MesoZP data is provided for copepods only (dominant group) and all metazoan zooplankton combined (mainly copepods and appendicularians). For DA, particulate matter was filtered (〉0.7µm) and analysed via liquid chromatography and tandem mass spectrometry. The upwelling treatment started on day 6. Methodological details in Goldenberg et al. (doi:10.3389/fmars.2022.1015188) and Goldenberg et al. (under review).
    Keywords: AQUACOSM; artificial upwelling; Canarias Sea; carbon dioxide removal; CDRmare; Ciliates, heterotrophic; Ciliates, heterotrophic, biomass as carbon; Copepoda; Copepoda, biomass as carbon; Copepoda, nauplii; DAM CDRmare - Test-ArtUp: Road testing ocean artificial upwelling; DATE/TIME; Day of experiment; Depth, water, experiment, bottom/maximum; Depth, water, experiment, top/minimum; diatoms; Dinoflagellates; Dinoflagellates, biomass as carbon; Domoic acid; Domoic acid per unit mass particulate organic carbon; Event label; Field experiment; GC2019; KOSMOS; KOSMOS_2019; KOSMOS_2019_Mesocosm-M1; KOSMOS_2019_Mesocosm-M2; KOSMOS_2019_Mesocosm-M3; KOSMOS_2019_Mesocosm-M4; KOSMOS_2019_Mesocosm-M5; KOSMOS_2019_Mesocosm-M6; KOSMOS_2019_Mesocosm-M7; KOSMOS_2019_Mesocosm-M8; KOSMOS Gran Canaria; MESO; mesocosm experiment; Mesocosm experiment; Mesocosm label; Mesozooplankton; Mesozooplankton, biomass as carbon; negative emission technology; Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean; Ocean Artificial Upwelling; Ocean-artUp; ocean fertilization; Phase description; plankton food web; Protista, heterotrophic; Protista, heterotrophic, biomass as carbon; Research Mission of the German Marine Research Alliance (DAM): Marine carbon sinks in decarbonisation pathways; Size fraction 〉 500 µm; Size fraction 〉 55 µm; Size fraction 200-500 µm; Size fraction 55-200 µm; Test-ArtUp; Treatment; trophic transfer; Type of study
    Type: Dataset
    Format: text/tab-separated-values, 4332 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 6
    facet.materialart.
    Unknown
    KOSMOS 2020 Peru mesocosm study on ecosystem responses to different light and upwelling intensities: carbon and nitrogen uptake rates from water samples (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-24
    Description: This data is part of the BMBF project CUSCO (Coastal Upwelling Systems in a Changing Ocean). Here we report carbon and nitrogen uptake rates by phytoplankton collected during a 35-day experiment where we enclosed natural plankton communities in in-situ mesocosms off Peru. The experiment investigated the interactive effects of light and upwelling on the Humboldt upwelling ecosystem by mimicking a gradient of upwelling intensities (0%, 15%, 30%, 45% and 60%) under summer-time high light and winter-time low light. Integrated seawater samples from a depth between 0 and 10m were collected using a 5L Integrating Water sampler (IWS; Hydro-Bios, Kiel). Samples were spiked with 13C labelled sodium bicarbonate and 15N labelled potassium nitrate. Samples were incubated for 24 hours at light intensities that resemble the light conditions in the mesocosms. After incubation a subsample (150-1000 ml) was filtered onto a 0.7 µm pre-combusted glass-fiber filters (GFF, Whatmann). The filters were acidified, then dried in the oven at 60 °C and later measured using an elemental analyzer (Flash IRMS, ThermoFisher) connected to a mass spectrometer (Delta V Advantage Isotope Ratio MS, ThermoFisher) with the ConFlo IV (ThermoFisher). Carbon and nitrogen uptake rates were calculated based on Slawyk et al. (1977, DOI:10.4319/lo.1977.22.5.0925) and Shiozaki et al. (2009, DOI:10.3354/meps07837) respectively.
    Keywords: AQUACOSM; Atom percent, 13C; Atom percent, 15N; Calculated; Carbon, organic, particulate; Carbon/Nitrogen uptake ratio; carbon uptake; Carbon uptake rate; Coastal Upwelling System in a Changing Ocean; CUSCO; DATE/TIME; Day of experiment; Delta V Advantage Isotope Ratio Mass spectrometer with ConFlo IV interface (ThermoFisher); Depth, water, experiment, bottom/maximum; Depth, water, experiment, top/minimum; Event label; Field experiment; Humboldt Current System; KOSMOS_2020; KOSMOS_2020_Mesocosm-M1; KOSMOS_2020_Mesocosm-M10; KOSMOS_2020_Mesocosm-M2; KOSMOS_2020_Mesocosm-M3; KOSMOS_2020_Mesocosm-M4; KOSMOS_2020_Mesocosm-M5; KOSMOS_2020_Mesocosm-M6; KOSMOS_2020_Mesocosm-M7; KOSMOS_2020_Mesocosm-M8; KOSMOS_2020_Mesocosm-M9; KOSMOS Peru; light limitation; MESO; Mesocosm experiment; Mesocosm label; mesocosm study; Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean; Nitrogen, organic, particulate; Nitrogen uptake rate; nutrient uptake; Peru; Treatment; Treatment: light condition; Type of study; Upwelling
    Type: Dataset
    Format: text/tab-separated-values, 2168 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 7
    facet.materialart.
    Unknown
    KOSMOS 2020 Peru mesocosm study on ecosystem responses to different light and upwelling intensities: HPLC pigment concentrations and phytoplankton community composition based on CHEMTAX analysis of water samples (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-24
    Description: This data is part of the BMBF project CUSCO (Coastal Upwelling Systems in a Changing Ocean). Here we report pigment concentrations and the phytoplankton community composition based on CHEMTAX analysis during a 35-day experiment, where we enclosed natural plankton communities in in-situ mesocosms off Peru. The experiment investigated the interactive effects of light and upwelling on the Humboldt upwelling ecosystem by mimicking a gradient of upwelling intensities (0%, 15%, 30%, 45% and 60%) under summer-time high light and winter-time low light. Integrated seawater samples from a depth between 0 and 10m were collected using a 5L Integrating Water sampler (IWS; Hydro-Bios, Kiel). To obtain pigment concentrations 0.15 – 1L of water sampled from the water column were filtered onto glass-fiber filters (precombusted at 450°C for 6h, GFF, 0.7 µm nominal pore size, Whatman) using a low vacuum of 200 mbar. Afterwards the filters were stored in cryovials at -80°C until analysis of photosynthetic pigments using reverse-phase high-performance liquid chromatography (HPLC) following (Barlow et al., 1997; doi:10.3354/meps161303) as described by (Paul et al., 2015; doi:10.5194/bg-19-5911-2022). The phytoplankton community composition was calculated with CHEMTAX, which classifies phytoplankton taxa based upon taxon-specific pigment ratios (Mackey et al., 1996; doi:10.3354/meps144265). The values for the Peruvian upwelling system determined by (DiTullio et al., 2005; doi:10.4319/LO.2005.50.6.1887) as described by (Meyer et al., 2017; doi:10.3389/fmars.2017.00001) were used as pigment ratios. As phytoplankton microscopy revealed high abundances of the raphydophite Fibrocapsa japonica, the initial pigment matrix was complemented by ratios for F. japonica from (Laza-Martinez et al., 2007; doi:10.1093/plankt/fbm069) from the Atlantic.
    Keywords: 19-Butanoyloxyfucoxanthin; 19-Hexanoyloxyfucoxanthin; Alloxanthin; AQUACOSM; Chemtax; Chlorophyll a; Chlorophyll a, Chlorophyta; Chlorophyll a, Coccolithophores; Chlorophyll a, Cryptophyta; Chlorophyll a, Diatoms; Chlorophyll a, Dinoflagellata; Chlorophyll a, Fibrocapsa japonica; Chlorophyll a, Pelagophytes; Chlorophyll a, Phaeocystis; Chlorophyll a, Prasinophyta; Chlorophyll a, Synechococcus spp.; Chlorophyll b; Chlorophyll c3; Coastal Upwelling System in a Changing Ocean; CUSCO; DATE/TIME; Day of experiment; Depth, water, experiment, bottom/maximum; Depth, water, experiment, top/minimum; Event label; Field experiment; Fucoxanthin; HPLC/CHEMTAX (Mackey et al. 1996); HPLC pigments; KOSMOS_2020; KOSMOS_2020_Mesocosm-M1; KOSMOS_2020_Mesocosm-M10; KOSMOS_2020_Mesocosm-M2; KOSMOS_2020_Mesocosm-M3; KOSMOS_2020_Mesocosm-M4; KOSMOS_2020_Mesocosm-M5; KOSMOS_2020_Mesocosm-M6; KOSMOS_2020_Mesocosm-M7; KOSMOS_2020_Mesocosm-M8; KOSMOS_2020_Mesocosm-M9; KOSMOS Peru; light limitation; Lutein; MESO; mesocosm experiment; Mesocosm experiment; Mesocosm label; Neoxanthin; Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean; Peridinin; Phytoplankton composition; Prasinoxanthin; Treatment; Treatment: light condition; Type of study; Upwelling; Violaxanthin; Zeaxanthin
    Type: Dataset
    Format: text/tab-separated-values, 5484 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 8
    facet.materialart.
    Unknown
    KOSMOS 2020 Peru mesocosm study on ecosystem responses to different light and upwelling intensities: dissolved organic carbon and total dissolved nitrogen concentrations of water samples (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-24
    Description: This data is part of the BMBF project CUSCO (Coastal Upwelling Systems in a Changing Ocean). Here we report the dissolved organic carbon and total dissolved nitrogen concentrations during a 35-day experiment, where we enclosed natural plankton communities in in-situ mesocosms off Peru. The experiment investigated the interactive effects of light and upwelling on the Humboldt upwelling ecosystem by mimicking a gradient of upwelling intensities (0%, 15%, 30%, 45% and 60%) under summer-time high light and winter-time low light. Integrated seawater samples from a depth between 0 and 10m were collected using a 5L Integrating Water sampler (IWS; Hydro-Bios, Kiel). Sub-samples (60 mL) were syringe filtered through two pre-combusted glass fiber filters (5 h, 450 °C). To reduce clogging, one 3.1 µm GMF filter was placed on top of a 0.7 µm GFF filter. The filtrate was acidified to pH 2 with 25% HCl before storing at -20°C until analysis. The DOC and TDN concentrations were measured using a TOC-VCPH analyser (Shimadzu). Instrument accuracy was evaluated by comparison against a deep Atlantic seawater reference (Consensus Reference Material project: D. Hansell, University of Miami, USA).
    Keywords: AQUACOSM; Carbon, organic, dissolved; Carbon, organic, dissolved, standard deviation; Coastal Upwelling System in a Changing Ocean; CUSCO; DATE/TIME; Day of experiment; Depth, water, experiment, bottom/maximum; Depth, water, experiment, top/minimum; DOC; Event label; Field experiment; Humboldt Current System; KOSMOS_2020; KOSMOS_2020_Mesocosm-M1; KOSMOS_2020_Mesocosm-M10; KOSMOS_2020_Mesocosm-M2; KOSMOS_2020_Mesocosm-M3; KOSMOS_2020_Mesocosm-M4; KOSMOS_2020_Mesocosm-M5; KOSMOS_2020_Mesocosm-M6; KOSMOS_2020_Mesocosm-M7; KOSMOS_2020_Mesocosm-M8; KOSMOS_2020_Mesocosm-M9; KOSMOS Peru; light limitation; MESO; Mesocosm experiment; Mesocosm label; mesocosm study; Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean; Nitrogen, total dissolved; Nitrogen, total dissolved, standard deviation; Shimadzu TOC-VCPH total organic carbon analyzer; TDN; Treatment; Treatment: light condition; Type of study
    Type: Dataset
    Format: text/tab-separated-values, 826 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 9
    facet.materialart.
    Unknown
    KOSMOS 2020 Peru mesocosm study on ecosystem responses to different light and upwelling intensities: particulate organic matter concentrations of water samples (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-24
    Description: This data is part of the BMBF project CUSCO (Coastal Upwelling Systems in a Changing Ocean). Here we report particulate organic matter concentrations collected during a 35-day experiment where we enclosed natural plankton communities in in-situ mesocosms off Peru. The experiment investigated the interactive effects of light and upwelling on the Humboldt upwelling ecosystem by mimicking a gradient of upwelling intensities (0%, 15%, 30%, 45% and 60%) under summer-time high light and winter-time low light. Integrated seawater samples from a depth between 0 and 10m were collected using a 5L Integrating Water sampler (IWS; Hydro-Bios, Kiel). Samples (150-1000 ml) were filtered onto a 0.7 µm pre-combusted glass-fiber filters (GFF, Whatman). The filters were acidified and then dried in the oven at 60 °C for 24 hours and total particulate carbon (TPC), particulate organic carbon (POC) and nitrogen (PON) content were measured using a CN analyzer (Euro EA3000, HEKAtech GmbH, Wegberg, Germany). POP filters were autoclaved for 30 min in 100 mL Schott Duran glass bottles using an oxidizing decomposition solution (Merck, catalogue no. 112936) to convert organic phosphate to orthophosphate. Phosphate concentrations were determined spectrophotometrically following Hansen and Koroleff (1999; doi:10.1002/9783527613984.ch10).
    Keywords: AQUACOSM; Carbon, organic, particulate; Carbon, total, particulate; Carbon/Nitrogen ratio; Carbon/Phosphorus ratio; Coastal Upwelling System in a Changing Ocean; CUSCO; DATE/TIME; Day of experiment; Depth, water, experiment, bottom/maximum; Depth, water, experiment, top/minimum; Element analyser Euro EA3000; Event label; Field experiment; Humboldt Current System; KOSMOS_2020; KOSMOS_2020_Mesocosm-M1; KOSMOS_2020_Mesocosm-M10; KOSMOS_2020_Mesocosm-M2; KOSMOS_2020_Mesocosm-M3; KOSMOS_2020_Mesocosm-M4; KOSMOS_2020_Mesocosm-M5; KOSMOS_2020_Mesocosm-M6; KOSMOS_2020_Mesocosm-M7; KOSMOS_2020_Mesocosm-M8; KOSMOS_2020_Mesocosm-M9; KOSMOS Peru; light limitation; MESO; Mesocosm experiment; Mesocosm label; mesocosm study; Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean; Nitrogen, organic, particulate; Nitrogen/Phosphorus ratio; particulate organic matter; Phosphorus, organic, particulate; POC; PON; POP; Spectrophotometer; according to Hansen & Koroleff (1999); Treatment; Treatment: light condition; Type of study; Upwelling
    Type: Dataset
    Format: text/tab-separated-values, 2576 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 10
    facet.materialart.
    Unknown
    Coastal N 2 fixation rates coincide spatially with N loss in the Humboldt Upwelling System off Peru (2023)
    AGU (American Geophysical Union) | Wiley
    Details
    Publication Date: 2024-02-07
    Description: Marine nitrogen (N2) fixation supports significant primary productivity in the global ocean. However, in one of the most productive regions of the world ocean, the northern Humboldt Upwelling System (HUS), the magnitude and spatial distribution of this process remains poorly characterized. This study presents a spatially resolved dataset of N2 fixation rates across six coastal transects of the northern HUS off Peru (8°S – 16°S) during austral summer. N2 fixation rates were detected throughout the waters column including within the OMZ between 12°S and 16°S. N2 fixation rates were highest where the subsurface Oxygen Minimum Zone (OMZ, O2 〈20 µmol L-1) was most intense and estimated nitrogen (N) loss was highest. There, rates were measured throughout the water column. Hence the vertical and spatial distribution of rates indicates colocation of N2 fixation with N loss in the coastal productive waters of the northern HUS. Despite high phosphate and total dissolvable iron (TdFe) concentrations throughout the study area, N2 fixation was still generally low (1.19 ± 3.81 nmol L-1 d-1) and its distribution could not be directly explained by these two factors. Our results suggest that the distribution was likely influenced by a complex interplay of environmental factors including phytoplankton biomass and organic matter availability, and potentially iron, or other trace metal (co)-limitation of both N2 fixation and primary production. In general, our results support previous conclusions that N2 fixation in the northern HUS plays a minor role as a source of new N and to replenish the regional N loss. Key Points: A north-to-south pattern in N2 fixation rates was observed implying increased N turnover between 12°S and 16°S where N loss was pronounced Highest N2 fixation rates were measured in coastal productive waters above and within the OMZ, showing no clear relationship with Fe or P The magnitude of N2 fixation was low compared to predictions, estimated to account for ∼0.3% of primary production and 〈2% of local N loss
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    OceanRep: Article in a Scientific Journal - peer-reviewed
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...