Hardware means for monitoring research of plankton in the habitat: problems, state of the art, and prospects

Dyomin, Victor; Davydova, Alexandra; Olshukov, Alexey; Polovtsev, Igor

doi:10.1109/oceanse.2019.8867512

Cited by 8 publications

(8 citation statements)

References 13 publications

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“…The required sampling of data on plankton particles and required recorded volume of the medium needed for representative results during statistical processing is estimated in works [ 39 , 49 ]. The required real-time scale for studied plankton processes was estimated in work [ 39 ].…”

Section: Resultsmentioning

confidence: 99%

“…The previous experience of building digital holographic cameras (DHCs) was used to create a device for accompanying ecosystem measurements of plankton [ 35 , 39 , 40 ].…”

Section: Methodsmentioning

confidence: 99%

“…As the experience of applying the automatic classification [ 21 , 35 , 39 , 40 ] has shown, the decision tree may be changed, for example, a new feature may be added-compactness [ 48 ], which may be expressed by the ratio of the area to the length of the particle image boundary. Such a possibility may be useful for more detailed or accurate classification, for example to diagnose gas hydrate methane bubbles or oil droplets.…”

Section: Methodsmentioning

confidence: 99%

“…The values of taxonomic features obtained through the analysis of plankton images from marine species identification databases [45,46] are tested on plankton images reconstructed from digital holograms and are given in [47]. As the experience of applying the automatic classification [21,35,39,40] has shown, the decision tree may be changed, for example, a new feature may be added-compactness [48], which may be expressed by the ratio of the area to the length of the particle image boundary. Such a possibility may be useful for more detailed or accurate classification, for example to diagnose gas hydrate methane bubbles or oil droplets.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Underwater Holographic Sensor for Plankton Studies In Situ including Accompanying Measurements

Dyomin

Davydova

Polovtsev

et al. 2021

Sensors

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The paper presents an underwater holographic sensor to study marine particles—a miniDHC digital holographic camera, which may be used as part of a hydrobiological probe for accompanying (background) measurements. The results of field measurements of plankton are given and interpreted, their verification is performed. Errors of measurements and classification of plankton particles are estimated. MiniDHC allows measurement of the following set of background data, which is confirmed by field tests: plankton concentration, average size and size dispersion of individuals, particle size distribution, including on major taxa, as well as water turbidity and suspension statistics. Version of constructing measuring systems based on modern carriers of operational oceanography for the purpose of ecological diagnostics of the world ocean using autochthonous plankton are discussed. The results of field measurements of plankton using miniDHC as part of a hydrobiological probe are presented and interpreted, and their verification is carried out. The results of comparing the data on the concentration of individual taxa obtained using miniDHC with the data obtained by the traditional method using plankton catching with a net showed a difference of no more than 23%. The article also contains recommendations for expanding the potential of miniDHC, its purpose indicators, and improving metrological characteristics.

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Section: Resultsmentioning

confidence: 99%

“…The previous experience of building digital holographic cameras (DHCs) was used to create a device for accompanying ecosystem measurements of plankton [ 35 , 39 , 40 ].…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Underwater Holographic Sensor for Plankton Studies In Situ including Accompanying Measurements

Dyomin

Davydova

Polovtsev

et al. 2021

Sensors

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“…The main advantage of using DHC is the possibility of studying plankton in its habitat without sampling and interference into the biocenosis. DHC is also characterized by a fairly representative medium volume recorded per exposure -up to 1 L, while in similar holographic cameras the analyzed medium volume does not exceed 40 cm 3 (Watson, 2011;Talapatra et al, 2012;Rotermund et al, 2016;Dyomin et al, 2019b;HoloSea, 2020;Lisst-Holo2, 2020). Unlike photographic methods of particle research (Olson and Sosik, 2007;Cowen and Guigand, 2008;Ohman et al, 2012), it is possible when reconstructing a digital hologram to obtain sharp images of all particles that were in a given medium volume during exposure.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of Plankton Spatial and Temporal Characteristics With the Use of a Submersible Digital Holographic Camera

et al. 2020

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This study shows that the use of a submersible digital holographic camera as part of a multifunctional hardware and software complex allows carrying out in situ measurements of plankton, automating the process of obtaining data on plankton, as well as classifying plankton species up to an order within the specified taxonomic groups. Such automation ensures monitoring expeditionary or stationary research of species diversity and spatial and temporal organization of zooplankton in conjunction with the hydrophysical parameters of the medium. This paper presents the full-scale results of vertical profiles and daily measurements of plankton made with the use of the submersible digital holographic camera as well as the classification of plankton in laboratory and field conditions in the automatic mode. It is shown that, within the accomplished version, the classification algorithm using the morphological parameter makes it possible to solve the problem quickly (the time required to obtain the result is less than 1 s and depends on the number of plankton particles and the frame size of a restored image); however, the classification accuracy by orders varies within 50-60%.

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Phototropic response features for different systematic groups of mesoplankton under adverse environmental conditions

Dyomin

Morgalev

Polovtsev

et al. 2021

Ecology and Evolution

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Hardware means for monitoring research of plankton in the habitat: problems, state of the art, and prospects

Cited by 8 publications

References 13 publications

Underwater Holographic Sensor for Plankton Studies In Situ including Accompanying Measurements

Underwater Holographic Sensor for Plankton Studies In Situ including Accompanying Measurements

Monitoring of Plankton Spatial and Temporal Characteristics With the Use of a Submersible Digital Holographic Camera

Phototropic response features for different systematic groups of mesoplankton under adverse environmental conditions

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