Identification of Phytoplankton Blooms under the Index of Inherent Optical Properties (IOP Index)

Aguilar-Maldonado, Jesús A.; Santamaría-del-Ángel, Eduardo; González-Silvera, Adriana; Cervantes, Omar; López, Lus M.; Gutiérrez-Magness, Angélica; Sebastiá-Frasquet, María-Teresa

doi:10.3390/ecws-2-04956

Cited by 2 publications

(2 citation statements)

References 49 publications

(63 reference statements)

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“…The turbidity patterns obtained from the Secchi disk readings indicated that the concentration of suspended material particles shows a persistent southward gradient with the highest values for CDR area and intertidal zone. The research of Aguilar-Maldonado et al (2017), showed the predominance of detritus against coloured dissolved organic matter and phytoplankton in the CDR area. Thus, the observed high reflectances are associated with suspended particulate matter, and higher turbidity.…”

Section: Resultsmentioning

confidence: 93%

Reflectances of SPOT multispectral images associated with the turbidity of the Upper Gulf of California

Aguilar-Maldonado¹,

Santamaría-del-Ángel²,

Sebastiá-Frasquet

2017

Rev. Teledetec.

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The use of satellite images for the observation and measurement of marine turbidity has been developed mainly with ocean colour sensors, such as MODIS. These images have a maximum spatial resolution of 250 m in their visible and infrared bands. In this research, images of the SPOT sensors were chosen as an alternative to overcome this limited spatial resolution. The objective was to prove the suitability of SPOT to measure turbidity in areas with great spatial variability. As a first step, all the images were standardized and the SPOT wavelength that had the largest association in the Principal Component Analysis was chosen (PCA). The results show that the bands of a SPOT multispectral image are highly redundant. The wavelength of the 610-680 nm (S2610-680) obtained the best association in 89% of the 73 images analysed. The SPOT reflectance (Rrs) (S2610-680) was compared with MODIS 620-670 nm (M1620-670), which has already been tested in other research and has proved to be adequate for measuring turbidity. Both sensors performance was similar for low and moderate reflectance but for high reflectance, SPOT (S2610-680) had a better performance than MODIS (M1620-670). Additionally, the SPOT Rrs (S2610-680) was associated with standardized Secchi disk depth data, which were measured in situ, to check SPOT suitability. SPOT Rrs (S2610-680)images were classified into: 1) cold or warm season, 2) spring tide or neap tide and 3) water flux or reflux. These constructed scenarios allowed to see the result of the Standardized Space Anomalies, which showed the continuous presence of low and medium values in the most oceanic region of the Upper Gulf of California (UGC) and very high values in all the scenarios in the intertidal zone. This research has shown that SPOT Rrs (S2610-680) is useful for observing, differentiating and measuring turbidity patterns in areas with very high spatial variability.

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Section: Resultsmentioning

confidence: 93%

Reflectances of SPOT multispectral images associated with the turbidity of the Upper Gulf of California

Aguilar-Maldonado¹,

Santamaría-del-Ángel²,

Sebastiá-Frasquet

2017

Rev. Teledetec.

Self Cite

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“…The high-density HABs formed by Scrippsiella, a genus of nontoxic, cosmopolitan marine dinoflagellates, lead to oxygen depletion and therefore fish kills (6). Scrippsiella blooms have been reported worldwide, including in China (7-10), Ukraine (11), Spain (12), the southern Red Sea (13), Mediterranean Sea (14,15), the Atlantic and Pacific coasts of Mexico (16)(17)(18)(19), Australia (6), the Atlantic coast of the USA (20), and the southeast coast of Iran (21). Although little is known about the physiology of this genus, its large physiological, morphological, and genetic variability suggest the existence of cryptic species.…”

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confidence: 99%

Scrippsiella acuminata versus Scrippsiella ramonii: A Physiological Comparison

Fagín

Bravo

Garrido³

et al. 2019

Cytometry Pt A

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Scrippsiella is a cosmopolitan dinoflagellate genus that is able to form Harmful Algal Blooms in coastal waters. The large physiological, morphological, and genetic variability that characterizes this genus suggest the existence of cryptic species. In this study, flow cytometric analyses were carried out to compare the cell cycle and life cycle of two Scrippsiella strains from two different species: Scrippsiella ramonii (VGO1053) and Scrippsiella acuminata (S3V). Both species were also investigated by internally transcribed spacer rDNA sequencing and high‐performance liquid chromatography‐based pigment analyses. The reddish‐brown color of S. acuminata and yellowish‐green hue of S. ramonii were consistent with the quantitative differences determined in their pigment profiles. Our results indicate that the cell cycle is light‐controlled and that it differs in the two species. S‐phase was detected during the light period in both, whereas the G2/M phase occurred during the light period in S. ramonii but under dark conditions in S. acuminata. The detection of 4C stages, mobile zygotes (planozygotes), and resting cysts in S. ramonii (nonclonal) provided convincing evidence of sexuality in this species. Sexual related processes were not found in the clonal S. acuminata strain, suggesting its heterothallic behavior (i.e., the need for outcrossing). The differences in the genome size of these species were examined as well. © 2019 The Authors. Cytometry Part A published by Wiley Periodicals, Inc. on behalf of International Society for Advancement of Cytometry.

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Identification of Phytoplankton Blooms under the Index of Inherent Optical Properties (IOP Index)

Abstract: . The diversity of sites shows that the IOP index is a suitable method to determine the bloom conditions.

Cited by 2 publications

References 49 publications

Reflectances of SPOT multispectral images associated with the turbidity of the Upper Gulf of California

Reflectances of SPOT multispectral images associated with the turbidity of the Upper Gulf of California

Scrippsiella acuminata versus Scrippsiella ramonii: A Physiological Comparison

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