A retrospective appraisal of the importance of high-resolution sampling for harmful algal blooms: Lessons from long-term phytoplankton monitoring at Sherkin Island, S.W. Ireland

Harmful Algae ◽  
2014 ◽  
Vol 40 ◽  
pp. 23-33 ◽  
Author(s):  
Barrie Dale ◽  
Matt Murphy
Keyword(s):  
High Resolution ◽  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Phytoplankton Monitoring

National coastal management challenges and needs

Shore & Beach ◽  
2020 ◽  
pp. 34-43
Author(s):  
Nicole Elko ◽  
Tiffany Roberts Briggs
Keyword(s):  
Coastal Management ◽  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Local Community ◽  
Extreme Event ◽  
Technical Information ◽  
Interdisciplinary Approach ◽  
Beach Erosion ◽  
The U.S

In partnership with the U.S. Geological Survey Coastal and Marine Hazards and Resources Program (USGS CMHRP) and the U.S. Coastal Research Program (USCRP), the American Shore and Beach Preservation Association (ASBPA) has identified coastal stakeholders’ top coastal management challenges. Informed by two annual surveys, a multiple-choice online poll was conducted in 2019 to evaluate stakeholders’ most pressing problems and needs, including those they felt most ill-equipped to deal with in their day-to-day duties and which tools they most need to address these challenges. The survey also explored where users find technical information and what is missing. From these results, USGS CMHRP, USCRP, ASBPA, and other partners aim to identify research needs that will inform appropriate investments in useful science, tools, and resources to address today’s most pressing coastal challenges. The 15-question survey yielded 134 complete responses with an 80% completion rate from coastal stakeholders such as local community representatives and their industry consultants, state and federal agency representatives, and academics. Respondents from the East, Gulf, West, and Great Lakes coasts, as well as Alaska and Hawaii, were represented. Overall, the prioritized coastal management challenges identified by the survey were: Deteriorating ecosystems leading to reduced (environmental, recreational, economic, storm buffer) functionality, Increasing storminess due to climate change (i.e. more frequent and intense impacts), Coastal flooding, both Sea level rise and associated flooding (e.g. nuisance flooding, king tides), and Combined effects of rainfall and surge on urban flooding (i.e. episodic, short-term), Chronic beach erosion (i.e. high/increasing long-term erosion rates), and Coastal water quality, including harmful algal blooms (e.g. red tide, sargassum). A careful, systematic, and interdisciplinary approach should direct efforts to identify specific research needed to tackle these challenges. A notable shift in priorities from erosion to water-related challenges was recorded from respondents with organizations initially formed for beachfront management. In addition, affiliation-specific and regional responses varied, such as Floridians concern more with harmful algal blooms than any other human and ecosystem health related challenge. The most common need for additional coastal management tools and strategies related to adaptive coastal management to maintain community resilience and continuous storm barriers (dunes, structures), as the top long-term and extreme event needs, respectively. In response to questions about missing information that agencies can provide, respondents frequently mentioned up-to-date data on coastal systems and solutions to challenges as more important than additional tools.

scholarly journals Long-Term Eutrophication and Dynamics of Bloom-Forming Microbial Communities during Summer HAB in Large Arctic Lake

Environments ◽  
2021 ◽  
Vol 8 (8) ◽  
pp. 82
Author(s):  
Nikolay Kashulin ◽  
Tatiana Kashulina ◽  
Alexander Bekkelund
Keyword(s):  
Microbial Communities ◽  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Temporal Dynamics ◽  
Arctic Lakes ◽  
Genetic Traits ◽  
Genetic Mechanisms ◽  
Redfield Ratios ◽  
Lake Imandra

Harmful algal blooms (HABs) in arctic lakes are recent phenomena. In our study, we performed a long-term analysis (1990–2017) of the eutrophication of Lake Imandra, a large subarctic lake, and explored the biodiversity of bloom-forming microorganisms of a 2017 summer HAB. We performed a 16Sr rRNA metabarcoding study of microbial communities, analysed the associations between N, P, C, and chlorophyll concentrations in the lake water, and developed models for the prediction of HABs based on total P concentration. We have demonstrated that blooms in Lake Imandra occur outside of optimal Redfield ratios and have a nonlinear association with P concentrations. We found that recent summer HABs in a lake occur as simultaneous blooms of a diatom Aulacoseira sp. and cyanobacteria Dolichospermum sp. We have studied the temporal dynamics of microbial communities during the bloom and performed an analysis of the publicly available Dolichospermum genomes to outline potential genetic mechanisms beneath simultaneous blooming. We found genetic traits requisite for diatom-diazotroph associations, which may lay beneath the simultaneous blooming of Aulacoseira sp. and Dolichospermum sp. in Lake Imandra. Both groups of organisms have the ability to store nutrients and form a dormant stage. All of these factors will ensure the further development of the HABs in Lake Imandra and the dispersal of these bloom-forming species to neighboring lakes.

scholarly journals Long-term hydrochemical changes and “Harmful Algal Blooms” in the Arctic Lake Imandra

2021 ◽  
Vol 11 (3) ◽  
pp. 327-340
Author(s):  
N.A. Kashulin ◽  
◽  
A.A. Bekkelund ◽  
V.A. Dauvalter ◽  
◽  
...  
Keyword(s):  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Total Content ◽  
Water Salinity ◽  
The Arctic ◽  
Murmansk Region ◽  
Imandra Lake ◽  
Lake Imandra

The large arctic Imandra Lake is located in the industrial Murmansk region, Russia. Since the 2000s it has regular Harmful Algal Blooms. Significant changes in hydrochemical indices were recorded in 1985—2017. The ratio of the main ions has changed, the pH and alkalinity have increased. The indicators of water salinity, the total content of P and N, and their mineral forms have decreased. The concentrations of Zn, Cu, Ni и SO42– have decreased as well. The decrease trends in the content of macronutrients in waters contradict traditional concepts and the role of mineral P and N in the development of HAB. This indicates more complex mechanisms of flowering in this arctic reservoir, which are being discussed.

scholarly journals Climate Change Effects on Aquaculture Production: Sustainability Implications, Mitigation, and Adaptations

2021 ◽  
Vol 5 ◽  
Author(s):  
Sahya Maulu ◽  
Oliver J. Hasimuna ◽  
Lloyd H. Haambiya ◽  
Concillia Monde ◽  
Confred G. Musuka ◽  
...  
Keyword(s):  
Climate Change ◽  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Sea Surface Salinity ◽  
Mitigation Measures ◽  
Negative Effects ◽  
Surface Salinity ◽  
Climate Change Effects ◽  
Aquaculture Production

Aquaculture continues to significantly expand its production, making it the fastest-growing food production sector globally. However, the sustainability of the sector is at stake due to the predicted effects of climate change that are not only a future but also a present reality. In this paper, we review the potential effects of climate change on aquaculture production and its implications on the sector's sustainability. Various elements of a changing climate, such as rising temperatures, sea-level rise, diseases and harmful algal blooms, changes in rainfall patterns, the uncertainty of external inputs supplies, changes in sea surface salinity, and severe climatic events have been discussed. Furthermore, several adaptation options have been presented as well as some gaps in existing knowledge that require further investigations. Overall, climate change effects and implications on aquaculture production sustainability are expected to be both negative and positive although, the negative effects outweigh the positive ones. Adapting to the predicted changes in the short-term while taking mitigation measures in the long-term could be the only way toward sustaining the sector's production. However, successful adaptation will depend on the adaptive capacity of the producers in different regions of the world.

scholarly journals Predicting Harmful Algal Blooms and Impacts on Shellfish Mariculture using Novel Data-Driven Approaches

2021 ◽  
Author(s):  
Oliver Stoner ◽  
Theo Economou ◽  
Ricardo Torres ◽  
Ian Ashton ◽  
Andrew Brown
Keyword(s):  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Statistical Modelling ◽  
Data Driven ◽  
Short Term ◽  
Marine Life ◽  
Learning Framework ◽  
Modelling Framework ◽  
Bivalve Shellfish

Abstract Harmful algal blooms (HABs) intoxicate and asphyxiate marine life, causing devastating environmental and socio-economic impacts costing at least $8bn/yr globally. Accumulation of phycotoxins from HAB phytoplankton in filter-feeding shellfish can poison human consumers, prompting site harvesting closures if concentrations in shellfish exceed safe levels. To better quantify both long- and short-term HAB risks, we developed novel data-driven approaches to predict phycotoxin concentrations in bivalve shellfish associated with HAB forming Dinophysis species. Our spatiotemporal statistical modelling framework assesses long-term HAB risks for different shellfish species in both data-rich and data-poor locations. This can revolutionise mariculture management by more confidently informing optimal siting of new shellfish operations and safe harvesting periods for businesses. Meanwhile, our machine learning framework forecasts phycotoxin concentrations further into the future than previously possible. Across 6 coastal, estuarine and loch sites, we achieve 87% overall accuracy in predicting future harvesting shutdowns 0-8 weeks ahead.

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