2019
DOI: 10.31951/2658-3518-2019-a-4-281
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Influence of solar radiation on chlorophyll a concentration assessment using fluorescence measured by the submersible sensor in Lake Baikal

Abstract: Assessment of chlorophyll a concentration based on fluorescence intensity is actively used at present. In natural waters, profile fluorescence is measured using submersible sensors. These sensors are equipped with no special chamber for phytoplankton dark adaptation before measurement. Effect of irradiance in the upper layer leads to a decrease in chlorophyll a fluorescence due to closing some reaction centers of photosystem 2. The conducted research on Lake Baikal has revealed the relationship between the sha… Show more

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Cited by 4 publications
(3 citation statements)
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“…Several efforts have been made to correct fluorometer data for NPQ in both inland waters (Serra et al 2009;Moiseeva et al 2019) and, more commonly, in marine systems (Xing et al 2012;Thomalla et al 2018;Xing et al 2018). Serra et al (2009) compared data collected in a freshwater reservoir from two in vivo fluorometers with data from HPLC laboratory analyses.…”
Section: Correcting For Nonphotochemical Quenchingmentioning
confidence: 99%
See 1 more Smart Citation
“…Several efforts have been made to correct fluorometer data for NPQ in both inland waters (Serra et al 2009;Moiseeva et al 2019) and, more commonly, in marine systems (Xing et al 2012;Thomalla et al 2018;Xing et al 2018). Serra et al (2009) compared data collected in a freshwater reservoir from two in vivo fluorometers with data from HPLC laboratory analyses.…”
Section: Correcting For Nonphotochemical Quenchingmentioning
confidence: 99%
“…While this method is ideal for low-frequency data, it is impractical for high-frequency data. Moiseeva et al (2019) determined the relationship between Photosynthetically Active Radiation (PAR) and the percentage of open reaction centers in PSII in samples from Lake Baikal with the use of PAM fluorometry. From this relationship, they corrected in vivo fluorescence profiles with an exponential model.…”
Section: Correcting For Nonphotochemical Quenchingmentioning
confidence: 99%
“…Water flowing through the pipeline quickly enters the measuring site, and phytoplankton remains adapted to the current in situ illumination regime; hence, some recreation centres of photosystem 2 are inactived, underestimating the measurement results [48], which explains the daytime minimum chlorophyll-a values. To obtain the true values, it is necessary to recalculate them, considering the PAR intensity at the water sampling site according to the method developed for Lake Baikal [49]. In the evening on 2 May 2021, the wind began to intensify from the NW direction and, consequently, the ice cover was carried away from the shore for several kilometres.…”
Section: Discussionmentioning
confidence: 99%