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  • PANGAEA  (25)
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  • 1
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    Photosynthetic efficiency and capacity of intertidal temperate seagrass Zostera marina from Rimouski, QC, Canada, under a light intensity gradient (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Eelgrass shoots (Zostera marina) from Rimouski, QC, were exposed in July 2020 to a natural gradient of light intensity, ranging from 6 to 860 µmol photons/m²/s, to assess the species' capacity to respond to light attenuation. After 5 and 25 days of light exposure, photosynthetic responses were examined using PAM (Pulse Amplitude Modulated) fluorometry. Rapid Light Curves (RLC) were carried out on the second leaf of each shoot and were used for extraction of photosynthetic parameters, such as the photosynthetic efficiency (alpha), the photosynthetic capacity (ETRmax), and the onset of light saturation of the photosynthetic apparatus (Ek).
    Keywords: Acclimation; Chamber number; DATE/TIME; East_Rimouski; Eelgrass; Experiment day; Hand picking; Laboratory experiment; light intensity; Light saturation; Maximal electron transport rate; PAM fluorometry; photophysiology; Photosynthetic quantum efficiency; Quebec, Canada; Rapid light curve (RLC), PAM fluorometry (Diving-PAM II, Heinz WalzGmbH, Germany); Replicate; Species; Specimen identification; subarctic; Temperature, water; Treatment: light intensity; Type of study; Uniform resource locator/link to reference; Zostera marina
    Type: Dataset
    Format: text/tab-separated-values, 1356 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Subcellular to shoot-scale photoacclimation of intertidal temperate seagrass Zostera marina to light attenuation (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: The dataset compiles pigment content, absorptance data, photosynthetic parameters and primary production data as proxies for summertime photoacclimation of the temperate intertidal eelgrass Zostera marina after a 25-day exposure to a natural light intensity gradient (6, 36, 74, 133, 355, 503 and 860 µmol photons/m²/s) under laboratory conditions at the Pointe-au-Père research station, East Rimouski, Quebec, Canada. The data bundle contains: 1) photosynthetic and total absorptance data at the end of the experiment, which respectively represent the fraction of incident visible light absorbed by the photosynthetic tissues corrected and not corrected for non-photosynthetic absorption; 2) pigment content at the end of the experiment, which includes chlorophyll a and b and total carotenoids contents; 3) photosynthetic parameters obtained by Rapid Light Curves (RLC) on days 5 and 25, including photosynthetic apparatus efficiency (alpha), capacity (ETRmax) and saturation (Ek); 4) whole shoot primary production at the end of the experiment, which was calculated from oxygen fluxes under light and dark conditions, and normalized by leaf surface.
    Keywords: Acclimation; East_Rimouski; Eelgrass; Hand picking; Laboratory experiment; light intensity; PAM fluorometry; photophysiology; Quebec, Canada; subarctic; Zostera marina
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Light absorption of intertidal temperate seagrass Zostera marina from Rimouski, QC, Canada, under a light intensity gradient (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Eelgrass shoots (Zostera marina) from Rimouski, QC, were exposed in July 2020 to a natural gradient of light intensity, ranging from 6 to 860 µmol photons/m²/s, to assess the species' capacity to respond to light attenuation. After 25 days of light exposure, the fraction of incident visible light absorbed by the leaves (absorptance) was quantified with a Lambda850 (PerkinElmer, USA) spectrophotometer with integrating sphere. Light absorption by the photosynthetic components of the leaves (photosynthetic absorptance) was distinguished from the total absorptance by correcting for the non-photosynthetic absorptance at 750 nm (Cummings and Zimmerman, 2003).
    Keywords: Absorption factor, photosynthetic; Absorption factor, total; Acclimation; Calculated; Chamber number; DATE/TIME; East_Rimouski; Eelgrass; Experiment day; Hand picking; Laboratory experiment; light intensity; PAM fluorometry; photophysiology; Quebec, Canada; Replicate; Species; Specimen identification; subarctic; Temperature, water; Treatment: light intensity; Type of study; Uniform resource locator/link to reference; Zostera marina
    Type: Dataset
    Format: text/tab-separated-values, 913 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Primary production of intertidal temperate seagrass Zostera marina from Rimouski, QC, Canada, under a light intensity gradient (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Eelgrass shoots (Zostera marina) from Rimouski, QC, were exposed in July 2020 to a natural gradient of light intensity, ranging from 6 to 860 µmol photons/m²/s, to assess the species' capacity to respond to light attenuation. After 25 days of light exposure, primary production of whole eelgrass shoots was assessed by respirometry. Net primary production (NPP), gross primary production (GPP) and dark respiration were calculated from oxygen fluxes of incubated shoots, under their respective light treatment and in total darkness, and standardized to leaf surface.
    Keywords: Acclimation; Calculated; Chamber number; DATE/TIME; East_Rimouski; Eelgrass; Experiment day; Fiber optic oxygen meter, Fibox 4, Presens, Germany; Gross photosynthesis rate, oxygen; Hand picking; Laboratory experiment; Leaf area; light intensity; Measured using software ImageJ; Net photosynthesis rate, oxygen; Oxygen production rate; PAM fluorometry; photophysiology; Quebec, Canada; Replicate; Respiration rate, oxygen; Species; Specimen identification; subarctic; Temperature, water; Treatment: light intensity; Type of study; Uniform resource locator/link to reference; Zostera marina
    Type: Dataset
    Format: text/tab-separated-values, 672 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Pigment content of intertidal temperate seagrass Zostera marina from Rimouski, QC, Canada, under a light intensity gradient (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Eelgrass shoots (Zostera marina) from Rimouski, QC, were exposed in July 2020 to a natural gradient of light intensity, ranging from 6 to 860 µmol photons/m²/s, to assess the species' capacity to respond to light attenuation. After 25 days of light exposure, pigment content was quantified using the second leaf of each shoot. Chlorophyll a, chlorophyll b, and total cerotenoids were extracted and quantified following Lichtenthaler's (1987) method.
    Keywords: Acclimation; Carotenoids; Chamber number; Chlorophyll a; Chlorophyll b; DATE/TIME; East_Rimouski; Eelgrass; Experiment day; Hand picking; Laboratory experiment; light intensity; PAM fluorometry; photophysiology; Quebec, Canada; Replicate; Species; Specimen identification; subarctic; Temperature, water; Treatment: light intensity; Type of study; Uniform resource locator/link to reference; Zostera marina
    Type: Dataset
    Format: text/tab-separated-values, 755 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    TOBB: Canada's three oceans of benthic biodiversity database - data in original xlsx format (2020)
    PANGAEA
    Details
    Publication Date: 2024-05-07
    Keywords: alpha diversity; Arctic Ocean; Atlantic Ocean; benthic invertebrates; biodiversity conservation; Canada_I; energy-diversity relationship; marine protected area; Pacific Ocean; productivity-diversity relationship; seafloor biodiversity
    Type: Dataset
    Format: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, 3.5 MBytes
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Abundances of intertidal macro-species measured through a multi-factorial in situ experiment of 10 weeks in a eelgrass bed in St. Lawrence Estuary (Baie-Saint-Ludger, Canada) (2021)
    PANGAEA
    Details
    Publication Date: 2024-05-07
    Description: We evaluated single and interactive effects of density reduction of Zostera marina L., a habitat-forming species, shading, and sediment nutrient enrichment on the response of intertidal epibenthic macro-species abundances. Abundances were measured two weeks after reducing eelgrass density (Period T1), then nutrients were added to the sediments and shades were added above the bed. Abundances were measured three weeks later (Period T2), then shades were taken down. Final abundances were measured five weeks later (Period T3). Epibenthos was collected using mesh bags (mesh size of 500 µm, diameter about 18 cm), each individual collected was identified then sifted through a series of sieves to determine biomass in ash free dry weight (AFDW; see doi:10.1594/PANGAEA.931116).
    Keywords: Abundance; Calliopius laeviusculus; Cancer irroratus, megalopa; Counting 〉500 µm fraction; Crassicorophium bonellii; DATE/TIME; Density; Ecrobia truncata; Edotia triloba; Eelgrass; Gammarus lawrencianus; Gammarus oceanicus; Gammarus sp., juvenile; Gammarus tigrinus; Hippolytidae; Idotea phosphorea; intertidal; invertebrates; Jaera albifrons; Lacuna vincta; LATITUDE; Littorina saxatilis; LONGITUDE; Macoma balthica; Margarites costalis; Mesodesma arctatum; MULT; Multiple investigations; multiple stress; Mya arenaria; Mya truncata; Mysis gaspensis; Mysis sp.; Mysis stenolepis; Mytilus spp.; Nereis pelagica; Nutrient; Period; Pholoe minuta; Phoxocephalus holbolli; Plot; Polychaeta; Pontogeneia inermis; Quebec, Canada; Sample code/label; Shading; StLawrence_Estuary; stress interaction; Tectura testudinalis; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 4320 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Macro-species taxonomy measured through a multi-factorial in situ experiment of 10 weeks in a eelgrass bed in St. Lawrence Estuary (Baie-Saint-Ludger, Canada) (2021)
    PANGAEA
    Details
    Publication Date: 2024-05-07
    Description: We evaluated single and interactive effects of density reduction of Zostera marina L., a habitat-forming species, shading, and sediment nutrient enrichment on the response of intertidal epibenthic macro-species. Epibenthos was collected using mesh bags (mesh size of 500 µm, diameter about 18 cm). This dataset reports all species identified through the experiment and their taxonomic classification.
    Keywords: Abundance; Class; Eelgrass; Family; Genus; intertidal; invertebrates; Kingdom; MULT; Multiple investigations; multiple stress; Order; Phylum; Quebec, Canada; Registration number of species; Species; StLawrence_Estuary; stress interaction; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 253 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Relative eelgrass leaf elongation and microalgal epiphyte load on eelgrass leaf measured through a multi-factorial in situ experiment of 10 weeks in a eelgrass bed in St. Lawrence Estuary (Baie-Saint-Ludger, Canada) (2021)
    PANGAEA
    Details
    Publication Date: 2024-05-07
    Description: We evaluated single and interactive effects of density reduction of Zostera marina L., a habitat-forming species, shading, and sediment nutrient enrichment on the response of eelgrass relative leaf elongation (RLE) and of microalgal epiphyte load on leaves. REL was evaluated once, as a proxy for growth, using five shoots per plot that were each marked with a reference hole at the top of the sheath using a pushpin marked at the end of Period T1 (two weeks after reducing eelgrass density and at the same time than adding nutrients sediment enrichment and shades). After 19 days, we collected the shoots and brought them back to the lab where leaf elongation was measured as the displacement of the mark relative to the reference mark on the oldest nongrowing leaf (Olesen & Sand-Jensen 1994). Total leaf elongation was then divided by sheath length and the number of days of elongation. We estimated the epiphyte (microalgae) load on eelgrass by scraping the leaves of one randomly selected shoot; we then filtered the water containing the epiphytes on GF/F filters that were then kept wrapped in aluminum foil at -80 °C until analysis. Epiphyte load was assessed using chlorophyll extraction with 90% acetone, following Parsons et al. (1984). Calculated chlorophyll weight was then divided by shoot dry weight.
    Keywords: Abundance; Chlorophyll a; Chlorophyll a analysis (Parsons et al., 1984, Pergamon Press, Oxford); Chlorophyll b; DATE/TIME; Density; Eelgrass; intertidal; invertebrates; Leaf growth rate, relative; MULT; Multiple investigations; multiple stress; Nutrient; Period; Plot; Quebec, Canada; Sample code/label; Shading; StLawrence_Estuary; stress interaction; Total elongation of leaves using a push-pin hole divided by sheath lenght and number of days of elongation; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 400 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Abundances of intertidal macro-species measured through a multi-factorial in situ experiment of 10 weeks in a eelgrass bed in St. Lawrence Estuary (Baie-Saint-Ludger, Canada) (2021)
    PANGAEA
    Details
    Publication Date: 2024-05-07
    Description: We evaluated single and interactive effects of density reduction of Zostera marina L., a habitat-forming species, shading, and sediment nutrient enrichment on the response of intertidal epibenthic macro-species abundances. Abundances were measured two weeks after reducing eelgrass density (Period T1), then nutrients were added to the sediments and shades were added above the bed. Abundances were measured three weeks later (Period T2), then shades were taken down. Final abundances were measured five weeks later (Period T3). Epibenthos was collected using mesh bags (mesh size of 500 µm, diameter about 18 cm), each individual collected was identified then sifted through a series of sieves as a proxy for biomass (ash free dry weight; AFDW).
    Keywords: Abundance; Counting 〉8.0 mm fraction; Counting 0.5-0.7 mm fraction; Counting 0.7-1.0 mm fraction; Counting 1.0-1.4 mm fraction; Counting 1.4-2.0 mm fraction; Counting 2.0-2.8 mm fraction; Counting 2.8-4.0 mm fraction; Counting 4.0-5.6 mm fraction; Counting 5.6-8.0 mm fraction; Density; Eelgrass; Epifaunal species abundance; intertidal; invertebrates; MULT; Multiple investigations; multiple stress; Nutrient; Period; Plot; Quebec, Canada; Shading; Species; StLawrence_Estuary; stress interaction; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 10640 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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