Harmful algal blooms and their eco-environmental indication

Sha, Jun; Xiong, Hu; Liu, Chengjun; Lu, Zhiying; Zhang, Jichao; Zhong, Huan; Zhang, Wei; Yan, Bing

doi:10.1016/j.chemosphere.2021.129912

Cited by 81 publications

(40 citation statements)

References 129 publications

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“…The thick mucilage layer limits the interaction between water and the atmosphere by covering the surface and can cause oxygen depletion in the water. This creates an anoxic, or oxygen-depleted, environment where fish and other organisms cannot survive (Sha et al, 2021). DO levels below 3 mg•L -1 (about 28-32%) are usually considered hypoxic and are a concern for marine organisms and marine environments.…”

Section: Discussionmentioning

confidence: 99%

Marine Mucilage in the Sea of Marmara and Its Effects on the Marine Ecosystem: Mass Deaths

2021

Turk J Zool

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In April of 2021, there was a massive explosion of marine mucilage in the Sea of Marmara, as a result, many invertebrates of marine communities suffered mass mortality. We summarize our results about the devastating effect of mucilage bloom on mass deaths in the Sea of Marmara. The phenomena were lethal to the pelagic fishes and crustaceans, and individuals were impacted severely smothered by mucilage or anoxia. Mucilage accumulations has shown its effectiveness in many areas around the Kapidag Peninsula. Misakça, Şirinçavuş, Narlı and Tatlısu regions, where mass death cases occurred, were selected as study areas, and these areas are characterized as shallow and calm waters. In total, 10164 dead individuals belonging to eighteen families were observed in the coastal area. Atherina sp. was the most affected species with an abundance of 3040 dead ind•100 m -2 , because of the spawning period in the coastal zone. Most of the species that died were pelagic, and Engraulis encrasicolus, Spicara sp., Trachurus trachurus and Sardina pilchardus also suffered massive mortality. Due to insufficient wave action and tidal currents, mucilage was also identified at depths 5-30 m. In the following years to come, mass deaths in the Sea of Marmara are likely to have adverse effects, particularly on the food web.

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Section: Discussionmentioning

confidence: 99%

Marine Mucilage in the Sea of Marmara and Its Effects on the Marine Ecosystem: Mass Deaths

2021

Turk J Zool

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“…It is well accepted that phytoplankton will not flourish and form substantial blooms without a proper supply of nutrients. It is not surprising, therefore, that the leading premise/theme/dogma in the field is that eutrophication is a major driving force of the intensification of toxic cyanobacteria blooms, in addition to global warming [ 8 , 17 , 18 , 19 , 20 ]. Contrary to this widely accepted view, the analysis by Ho and co-workers [ 12 ] of near-surface phytoplankton blooms from 71 large lakes around the world, covering three decades using Landsat 5 data, showed that exacerbation of bloom conditions in the majority of the lakes did not consistently track with previously hypothesized drivers.…”

Section: Prevention Of Bloom Developmentmentioning

confidence: 99%

“…As tedious, and time-consuming, and resource-consuming as this process may be, it is likely that it may lead to a significant reduction of cyanoHAB events and bloom intensities in the long-run. As the nutrient-bloom congruence has (and still is) been investigated in many studies and summarized in several review articles [ 6 , 8 , 18 , 23 ], we do not elaborate on this topic further. However, we draw the attention of the scientific community and water management authorities to the idea that they should anticipate a massive change in phytoplankton diversity along with a reduction in the eutrophication state.…”

Section: Prevention Of Bloom Developmentmentioning

confidence: 99%

Cyanobacterial Harmful Algal Blooms in Aquatic Ecosystems: A Comprehensive Outlook on Current and Emerging Mitigation and Control Approaches

Sukenik

2021

Microorganisms

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An intensification of toxic cyanobacteria blooms has occurred over the last three decades, severely affecting coastal and lake water quality in many parts of the world. Extensive research is being conducted in an attempt to gain a better understanding of the driving forces that alter the ecological balance in water bodies and of the biological role of the secondary metabolites, toxins included, produced by the cyanobacteria. In the long-term, such knowledge may help to develop the needed procedures to restore the phytoplankton community to the pre-toxic blooms era. In the short-term, the mission of the scientific community is to develop novel approaches to mitigate the blooms and thereby restore the ability of affected communities to enjoy coastal and lake waters. Here, we critically review some of the recently proposed, currently leading, and potentially emerging mitigation approaches in-lake novel methodologies and applications relevant to drinking-water treatment.

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“…Actually, their impacts on transitional aquatic ecosystems may increase due to global climatic change [61]. Cyanobacteria produce an impressive range of toxic secondary metabolites, the cyanotoxins, whose presence and concentration in the waters is both a relevant threat to human health and the environment and a substantial economic cost [62,63]. Cyanobacteria are ancient, cosmopolitan inhabitants of terrestrial environments and fresh, transitional, and marine ecosystems; they are photosynthetic and prokaryotic organisms, classified in 150 genera, over 40 of which include species that produce cyanotoxins [64].…”

Section: Heavy Metalsmentioning

confidence: 99%

Cyanobacteria, Cyanotoxins, and Neurodegenerative Diseases: Dangerous Liaisons

Sini

Dang

Fais

et al. 2021

IJMS

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The prevalence of neurodegenerative disease (ND) is increasing, partly owing to extensions in lifespan, with a larger percentage of members living to an older age, but the ND aetiology and pathogenesis are not fully understood, and effective treatments are still lacking. Neurodegenerative diseases such as Alzheimer’s disease, Parkinson’s disease, and amyotrophic lateral sclerosis are generally thought to progress as a consequence of genetic susceptibility and environmental influences. Up to now, several environmental triggers have been associated with NDs, and recent studies suggest that some cyanotoxins, produced by cyanobacteria and acting through a variety of molecular mechanisms, are highly neurotoxic, although their roles in neuropathy and particularly in NDs are still controversial. In this review, we summarize the most relevant and recent evidence that points at cyanotoxins as environmental triggers in NDs development.

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Harmful algal blooms and their eco-environmental indication

Cited by 81 publications

References 129 publications

Marine Mucilage in the Sea of Marmara and Its Effects on the Marine Ecosystem: Mass Deaths

Marine Mucilage in the Sea of Marmara and Its Effects on the Marine Ecosystem: Mass Deaths

Cyanobacterial Harmful Algal Blooms in Aquatic Ecosystems: A Comprehensive Outlook on Current and Emerging Mitigation and Control Approaches

Cyanobacteria, Cyanotoxins, and Neurodegenerative Diseases: Dangerous Liaisons

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