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  • 1
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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: 2024-05-07
    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
  • 2
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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: 2024-05-07
    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
  • 3
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    Unknown
    Primary production of intertidal temperate seagrass Zostera marina from Rimouski, QC, Canada, under a light intensity gradient (2022)
    PANGAEA
    Details
    Publication Date: 2024-05-07
    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
  • 4
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    Unknown
    Photosynthetic efficiency and capacity of intertidal temperate seagrass Zostera marina from Rimouski, QC, Canada, under a light intensity gradient (2022)
    PANGAEA
    Details
    Publication Date: 2024-05-07
    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
  • 5
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    Unknown
    Subcellular to shoot-scale photoacclimation of intertidal temperate seagrass Zostera marina to light attenuation (2022)
    PANGAEA
    Details
    Publication Date: 2024-05-07
    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
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