Light absorption of intertidal temperate seagrass Zostera marina from Rimouski, QC, Canada, under a light intensity gradient

• Main Authors: Léger-Daigle, Romy, Noisette, Fanny, Bélanger, Simon, Cusson, Mathieu, Nozais, Christian
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Absorption factor; photosynthetic; 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; Subarctic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.943535; https://doi.org/10.1594/PANGAEA.943535

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).