Photosynthetically active radiation distribution in the Zostera noltii Hornemann canopy at various solar altitudes

Alexander V. Prazukin; Alexander A. Latushkin; Yury K. Firsov; Anna A. Chepyzhenko

doi:10.1117/12.2603316

15 December 2021 Photosynthetically active radiation distribution in the Zostera noltii Hornemann canopy at various solar altitudes

Alexander V. Prazukin, Alexander A. Latushkin, Yury K. Firsov, Anna A. Chepyzhenko

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Proceedings Volume 11916, 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 119163I (2021) https://doi.org/10.1117/12.2603316
Event: 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2021, Moscow, Russian Federation

Abstract

Studies were carried out on August 14, 2019, in the shallow part of the Kazachya Bay (Sevastopol, Black Sea) under cloudless sky conditions. At the selected point of the Zostera noltii Hornemann canopy, at a depth of 42 cm, with coordinates 44° 57′26″ N, 33° 40′33″ E, measurements of photosynthetically active radiation intensity (I_PAR) were taken. During the entire period of research, the plants were in a vertical state. The Z. noltii biomass (m_dry) distribution along the canopy height (z) was found to change unevenly, increasing with depth (m_dry(z) = 0.0001Z^3.881; R² = 0.95), and this is reflected in the vertical distribution of I_PAR. I_PAR was observed to decrease with the depth of the canopy, the manner of this decrease being largely dependent on solar altitudes. The measurement results show a significant influence of the Fresnel effect on I_PAR values.

Citation Download Citation

Alexander V. Prazukin, Alexander A. Latushkin, Yury K. Firsov, and Anna A. Chepyzhenko "Photosynthetically active radiation distribution in the Zostera noltii Hornemann canopy at various solar altitudes", Proc. SPIE 11916, 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 119163I (15 December 2021); https://doi.org/10.1117/12.2603316

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