Characterizing algal blooms in a shallow &amp; a deep channel

Shehhi, Maryam R. Al; Nelson, David R.; Farzanah, Rashed; Alshihi, Rashid; Salehi‐Ashtiani, Kourosh

doi:10.1016/j.ocecoaman.2021.105840

Cited by 9 publications

(5 citation statements)

References 67 publications

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“…Most of these blooms occur in January-April with a maximum frequency being recorded in April (17%) due to intense solar radiation. As observed, blooms in this region occur during both monsoons, which is explained by the combination of the environmental factors encouraging the growth of blooms, such as moderate rainfall in December-January, high winds and high light intensity in March-April, and water mass advection during NEMs and SWMs in opposite directions [58,105].…”

Section: Northwest Monsoonsupporting

confidence: 54%

“…They can appear in the form of red heterotrophic Noctiluca [87] or green mixotrophic Noctiluca, and commonly cause the dark discoloration of waters to depths exceeding 2000 m [2,[107][108][109]. Species concentrations can be very high (reaching 3 × 10 6 cells m −3 ) in the NIO region [93], and they can become harmful by producing a lot of ammonia [105].…”

Section: Biological Makeup Of Algal Bloom Generamentioning

confidence: 99%

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Identifying Algal Bloom ‘Hotspots’ in Marginal Productive Seas: A Review and Geospatial Analysis

Shehhi

Samad

2022

Remote Sensing

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Algal blooms in the marginal productive seas of the Indian Ocean are projected to become more prevalent over the coming decades. They reach from lower latitudes up to the coast of the northern Indian Ocean and the populated areas along the Arabian Gulf, Sea of Oman, Arabian Sea, and the Red Sea. Studies that document algal blooms in the Indian Ocean have either focused on individual or regional waters or have been limited by a lack of long-term observations. Herein, we attempt to review the impact of major monsoons on algal blooms in the region and identify the most important oceanic and atmospheric processes that trigger them. The analysis is carried out using a comprehensive dataset collected from many studies focusing on the Indian Ocean. For the first time, we identify ten algal bloom hotspots and identify the primary drivers supporting algal blooms in them. Growth is found to depend on nutrients brought by dust, river runoff, upwelling, mixing, and advection, together with the availability of light, all being modulated by the phase of the monsoon. We also find that sunlight and dust deposition are strong predictors of algal bloom species and are essential for understanding marine biodiversity.

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Section: Northwest Monsoonsupporting

confidence: 54%

Section: Biological Makeup Of Algal Bloom Generamentioning

confidence: 99%

Identifying Algal Bloom ‘Hotspots’ in Marginal Productive Seas: A Review and Geospatial Analysis

Shehhi

Samad

2022

Remote Sensing

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“…For the La Brea fire, the change in CIcyano at Lake Cachuma was higher than Lake Casitas (5.7 and 0.8, respectively), and was likely influenced by the larger surface area for nutrient deposition, closer proximity to the fire, and shallower lake depth allowing for sunlight penetration and mixing that promotes cyanobacteria growth (Tables S6† and 1). 48,126…”

Section: Discussionmentioning

confidence: 99%

“…For the La Brea re, the change in CIcyano at Lake Cachuma was higher than Lake Casitas (5.7 and 0.8, respectively), and was likely inuenced by the larger surface area for nutrient deposition, closer proximity to the re, and shallower lake depth allowing for sunlight penetration and mixing that promotes cyanobacteria growth (Tables S6 † and 1). 48,126 For cases where depth could be determined, lakes with shallow depths generally experienced more severe blooms. Mystic Lake experienced the most severe bloom of all lakes examined during the Zaca Fire, likely due to the shallow depth (2 m) of the lake (Table S6 †).…”

Section: Nutrients and Other Factors That Affect Cyanobacteria Bloomsmentioning

confidence: 99%

Wildfires in the western United States are mobilizing PM_2.5-associated nutrients and may be contributing to downwind cyanobacteria blooms

Olson

Boaggio

Rice

et al. 2023

Environ. Sci.: Processes Impacts

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“…an average of 8 sandstorms occur in Kuwait each year) [20], 3) high salinity on average of 40-41 psu [21], and 4) frequent algal bloom outbreaks (e.g. >3 events per year) [22].…”

Section: Introductionmentioning

confidence: 99%

Upwelling and nutrient dynamics in the Arabian Gulf and sea of Oman

Ismail

Shehhi²

2022

PLoS ONE

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This study demonstrates the vertical and horizontal distribution of nutrients and the seasonal response of nutrients to upwelling in the Arabian Gulf and the Sea of Oman. Thus, monthly data on nitrate, phosphate, and silicate are obtained from the World Ocean Atlas 2018 (WOA), as well as estimates of coastal and curl driven upwelling in both regions. The results of the study indicate that the Sea of Oman’s surface and deep waters contained higher concentrations of nutrients than the Arabian Gulf by 80%. In addition, both regions have exhibited a general increase in the vertical distribution of nutrients as the depth increases. Among the aforementioned nutrients, nitrate is found to be a more limiting nutrient for phytoplankton growth than phosphate as the nitrate-to-phosphate ratios (N:P) in surface waters are lower (≤ 4.6:1) than the Redfield ratio (16:1). As for the upwelling, curl-driven upwelling accounts for more than half of the total upwelling in both regions, and both play an important role in nutrient transport. Thus, nutrients are upwelled from the subsurface to the mixed layer at a rate of 50% in the Oman Sea from 140 m to 20 m during the summer and to 40 m during the winter. Similarly, the Arabian Gulf shows 50% transport for nitrates, but 32% for phosphates, from 20 m to 5–10 m. However, due to the abundance of diatoms at the surface of the Arabian Gulf, the surface silicate content is 30% higher than that of the deeper waters.

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Characterizing algal blooms in a shallow & a deep channel

Cited by 9 publications

References 67 publications

Identifying Algal Bloom ‘Hotspots’ in Marginal Productive Seas: A Review and Geospatial Analysis

Identifying Algal Bloom ‘Hotspots’ in Marginal Productive Seas: A Review and Geospatial Analysis

Wildfires in the western United States are mobilizing PM_2.5-associated nutrients and may be contributing to downwind cyanobacteria blooms

Upwelling and nutrient dynamics in the Arabian Gulf and sea of Oman

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Characterizing algal blooms in a shallow & a deep channel

Cited by 9 publications

References 67 publications

Identifying Algal Bloom ‘Hotspots’ in Marginal Productive Seas: A Review and Geospatial Analysis

Identifying Algal Bloom ‘Hotspots’ in Marginal Productive Seas: A Review and Geospatial Analysis

Wildfires in the western United States are mobilizing PM2.5-associated nutrients and may be contributing to downwind cyanobacteria blooms

Upwelling and nutrient dynamics in the Arabian Gulf and sea of Oman

Contact Info

Product

Resources

About

Wildfires in the western United States are mobilizing PM_2.5-associated nutrients and may be contributing to downwind cyanobacteria blooms