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

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原文链接

NETL
Spie-Int Soc Optical Engineering

外文摘要：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); R~2 = 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。

外文关键词：

vegetation canopyseagrassphotosynthetically active radiation (PAR)Fresnel effectZostera noltii

作者：

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

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作者单位：

A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, 2, Nakhimov ave., Sevastopol, Russian Federation, 299011

Marine Hydrophysical Institute of RAS, 2 Kapitanskaya St., Sevastopol, Russian Federation 299011

会议名称：

International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics

会议地点：

Moscow(RU)

会议母体文献：

27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics

页码：

119163I.1-119163I.8

出版时间：

2021

DOI：

10.1117/12.2603316