Dagmar B. Stengel
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View article: Differential prevalence of arsenic speciation in the kelps Laminaria digitata and L. hyperborea
Differential prevalence of arsenic speciation in the kelps Laminaria digitata and L. hyperborea Open
Large variability in highly toxic inorganic arsenic (iAs) has previously been reported for the kelp Laminaria digitata. This study aimed to compare iAs concentrations in two morphologically similar kelps species (L. digitata and L. hyperbo…
View article: The green seaweed <i>Ulva</i> : tomorrow’s “wheat of the sea” in foods, feeds, nutrition, and biomaterials
The green seaweed <i>Ulva</i> : tomorrow’s “wheat of the sea” in foods, feeds, nutrition, and biomaterials Open
Ulva, a genus of green macroalgae commonly known as sea lettuce, has long been recognized for its nutritional benefits for food and feed. As the demand for sustainable food and feed sources continues to grow, so does the interest in…
View article: Ecotype-Specific and Correlated Seasonal Responses of Biomass Production, Non-Structural Carbohydrates, and Fatty Acids in Zostera marina
Ecotype-Specific and Correlated Seasonal Responses of Biomass Production, Non-Structural Carbohydrates, and Fatty Acids in Zostera marina Open
Seagrasses, which are marine flowering plants, provide numerous ecological services and goods. Zostera marina is the most widely distributed seagrass in temperate regions of the northern hemisphere, tolerant of a wide range of environmenta…
View article: Temporal and intra-thallus variation in arsenic species in the brown macroalga Laminaria digitata
Temporal and intra-thallus variation in arsenic species in the brown macroalga Laminaria digitata Open
Environmental context Arsenic contamination has a disproportionate effect on marine ecosystems. Organisms such as some marine macroalgae, which accumulate potentially toxic elements from the surrounding environment, have developed an inter…
View article: Effects of high temperature and marine heat waves on seagrasses: Is warming affecting the nutritional value of Posidonia oceanica?
Effects of high temperature and marine heat waves on seagrasses: Is warming affecting the nutritional value of Posidonia oceanica? Open
View article: Field thermo acclimation increases the resilience of Posidonia oceanica seedlings to marine heat waves
Field thermo acclimation increases the resilience of Posidonia oceanica seedlings to marine heat waves Open
Acclimation is a response that results from chronic exposure of an individual to a new environment. This study aimed to investigate whether the thermal environment affects the early development of the seagrass Posidonia oceanica, and wheth…
View article: Isolation, identification, and biochemical characterization of a novel bifunctional phosphomannomutase/phosphoglucomutase from the metagenome of the brown alga Laminaria digitata
Isolation, identification, and biochemical characterization of a novel bifunctional phosphomannomutase/phosphoglucomutase from the metagenome of the brown alga Laminaria digitata Open
Macroalgae host diverse epiphytic bacterial communities with potential symbiotic roles including important roles influencing morphogenesis and growth of the host, nutrient exchange, and protection of the host from pathogens. Macroalgal cel…
View article: Seasonal plant development and meadow structure of Irish and southern Spanish seagrass populations
Seasonal plant development and meadow structure of Irish and southern Spanish seagrass populations Open
Zostera marina and Z. noltii are two dominant meadow-forming seagrass species in temperate regions in the northern hemisphere. Seagrass meadows provide several goods and ecological services and rank amongst the most valuable ecosystems wor…
View article: Concise review of the macroalgal species Pelvetia canaliculata (Linnaeus) Decaisne & Thuret
Concise review of the macroalgal species Pelvetia canaliculata (Linnaeus) Decaisne & Thuret Open
Pelvetia canaliculata (L.) Dcne. et Thur. is a marine brown macroalga within the Fucaceae (Fucales, Phaeophyceae, Ochrophyta) and the only species remaining in the monotypic genus Pelvetia . Abundant on sheltered rocky shores of the North-…
View article: Low energy harvesting of hydrophobic microalgae (Tribonema sp.) by electro-flotation without coagulation
Low energy harvesting of hydrophobic microalgae (Tribonema sp.) by electro-flotation without coagulation Open
Microalgae have great potential for biofuel production and wastewater treatment, but the high cost of harvesting hinders their practical application. In this study, economical harvesting of hydrophobic microalgae by electro-flotation witho…
View article: Bromoform, mycosporine-like amino acids and phycobiliprotein content and stability in Asparagopsis armata during long-term indoor cultivation
Bromoform, mycosporine-like amino acids and phycobiliprotein content and stability in Asparagopsis armata during long-term indoor cultivation Open
As the commercial use of seaweed for natural product extraction calls for abundant, uniform biomass, this study focused on the production and the variability of the harvested biomass of valuable compounds produced by a commercially relevan…
View article: Seasonal Acclimation Modulates the Impacts of Simulated Warming and Light Reduction on Temperate Seagrass Productivity and Biochemical Composition
Seasonal Acclimation Modulates the Impacts of Simulated Warming and Light Reduction on Temperate Seagrass Productivity and Biochemical Composition Open
Increases in seawater temperature and reduction in light quality have emerged as some of the most important threats to marine coastal communities including seagrass ecosystems. Temperate seagrasses, including Zostera marina , typically hav…
View article: An ecological baseline for <scp><i>Laminaria hyperborea</i></scp> forests in western Ireland
An ecological baseline for <span><i>Laminaria hyperborea</i></span> forests in western Ireland Open
The biodiversity associated with subtidal Irish kelp forests dominated by Laminaria hyperborea has never been described. To enumerate species assemblages in these ecosystems, subtidal surveys were done throughout the calendar year to inves…
View article: Corrigendum to: Short-term effects of increased CO2, nitrate and temperature on photosynthetic activity in <i>Ulva rigida</i> (Chlorophyta) estimated by different pulse amplitude modulated fluorometers and oxygen evolution
Corrigendum to: Short-term effects of increased CO2, nitrate and temperature on photosynthetic activity in <i>Ulva rigida</i> (Chlorophyta) estimated by different pulse amplitude modulated fluorometers and oxygen evolution Open
View article: Developing a Sustainable and Circular Bio-Based Economy in EU: By Partnering Across Sectors, Upscaling and Using New Knowledge Faster, and For the Benefit of Climate, Environment & Biodiversity, and People & Business
Developing a Sustainable and Circular Bio-Based Economy in EU: By Partnering Across Sectors, Upscaling and Using New Knowledge Faster, and For the Benefit of Climate, Environment & Biodiversity, and People & Business Open
This paper gives an overview of development of the EU-bioeconomy, 2014–2020. The Vision of the new Circular Bio-based Economy, CBE is presented: Unlocking the full potential of all types of sustainably sourced biomass, crop residues, indus…
View article: Blue Carbon and Marine Carbon Sequestration in Irish Waters and Coastal Habitats
Blue Carbon and Marine Carbon Sequestration in Irish Waters and Coastal Habitats Open
Atmospheric CO2 is rising globally. Opportunities for reducing this trend include energy sector
\nadjustments and management of both land and ocean resources. Improved management of coastal and
\noceanic ecosystems is therefore poised to c…
View article: Diversity of bacteria populations associated with different thallus regions of the brown alga Laminaria digitata
Diversity of bacteria populations associated with different thallus regions of the brown alga Laminaria digitata Open
Stipitate kelp species such as Laminaria digitata dominate most cold-water subtidal rocky shores and form underwater forests which are among the most productive coastal systems worldwide. Laminaria also sustains rich bacterial communities …
View article: Filamentous microalgae as an advantageous co-substrate for enhanced methane production and digestate dewaterability in anaerobic co-digestion of pig manure
Filamentous microalgae as an advantageous co-substrate for enhanced methane production and digestate dewaterability in anaerobic co-digestion of pig manure Open
This study aimed at exploring filamentous microalgae (Tribonema sp.) as an advantageous co-substrate for anaerobic digestion (AD) of pig manure. Its impacts on the AD performance were assessed in terms of methane yield, energy conversion e…
View article: Short-term effects of increased CO2, nitrate and temperature on photosynthetic activity in <i>Ulva rigida</i> (Chlorophyta) estimated by different pulse amplitude modulated fluorometers and oxygen evolution
Short-term effects of increased CO2, nitrate and temperature on photosynthetic activity in <i>Ulva rigida</i> (Chlorophyta) estimated by different pulse amplitude modulated fluorometers and oxygen evolution Open
Short-term effects of pCO2 (700–380 ppm; High carbon (HC) and Low carbon (LC), respectively) and nitrate content (50–5 µM; High nitrogen (HN) and Low nitrogen (LN), respectively on photosynthesis were investigated in Ulva rigida (Chlorophy…
View article: Decoupling Abundance and Biomass of Phytoplankton Communities Under Different Environmental Controls: A New Multi-Metric Index
Decoupling Abundance and Biomass of Phytoplankton Communities Under Different Environmental Controls: A New Multi-Metric Index Open
Increased nutrient delivery to estuarine systems results in elevated growth of primary producers. This is evidenced by high chlorophyll concentrations and increased frequency of phytoplankton blooms. However, shifts in nutrient loads to es…
View article: Arsenolipids are not uniformly distributed within two brown macroalgal species Saccharina latissima and Alaria esculenta
Arsenolipids are not uniformly distributed within two brown macroalgal species Saccharina latissima and Alaria esculenta Open
Brown macroalgae Saccharina latissima (30-40 individuals) and Alaria esculenta (15-20 individuals) were collected from natural populations in winter in Iceland. The algal thalli were sectioned into different parts (e.g. holdfast, stipe, ol…
View article: Microbial Population Changes in Decaying Ascophyllum nodosum Result in Macroalgal-Polysaccharide-Degrading Bacteria with Potential Applicability in Enzyme-Assisted Extraction Technologies
Microbial Population Changes in Decaying Ascophyllum nodosum Result in Macroalgal-Polysaccharide-Degrading Bacteria with Potential Applicability in Enzyme-Assisted Extraction Technologies Open
Seaweeds are of significant interest in the food, pharmaceutical, and agricultural industries as they contain several commercially relevant bioactive compounds. Current extraction methods for macroalgal-derived metabolites are, however, pr…
View article: Metagenomic analysis reveals significant seasonal variations in the epiphytic bacterial communities associated with different parts of the brown seaweed Laminaria digitata
Metagenomic analysis reveals significant seasonal variations in the epiphytic bacterial communities associated with different parts of the brown seaweed Laminaria digitata Open
Brown seaweeds such as Laminaria species are a rich source of polysaccharides such as laminarin and fucoidan which have a variety of functional food and animal feed applications, as well as alginates with demonstrated biological and pharma…
View article: Protein extraction and bioactive hydrolysate generation from two microalgae, <i>Porphyridium purpureum</i> and <i>Phaeodactylum tricornutum</i>
Protein extraction and bioactive hydrolysate generation from two microalgae, <i>Porphyridium purpureum</i> and <i>Phaeodactylum tricornutum</i> Open
Protein extraction and bioactive hydrolysate generation from two microalgae, Porphyridium purpureum and Phaeodactylum tricornutum.
View article: Iodine content in bulk biomass of wild-harvested and cultivated edible seaweeds: Inherent variations determine species-specific daily allowable consumption
Iodine content in bulk biomass of wild-harvested and cultivated edible seaweeds: Inherent variations determine species-specific daily allowable consumption Open
View article: Effects of an experimental heat wave on fatty acid composition in two Mediterranean seagrass species
Effects of an experimental heat wave on fatty acid composition in two Mediterranean seagrass species Open
View article: A field deployable method for a rapid screening analysis of inorganic arsenic in seaweed
A field deployable method for a rapid screening analysis of inorganic arsenic in seaweed Open
Inorganic arsenic (iAs) in 13 store-bought edible seaweed samples and 34 dried kelp (Laminaria digitata) samples was determined by a newly developed, field-deployable method (FDM) with the aid of a field test kit for arsenic in wate…
View article: Evaluation of food grade solvents for lipid extraction and impact of storage temperature on fatty acid composition of edible seaweeds Laminaria digitata (Phaeophyceae) and Palmaria palmata (Rhodophyta)
Evaluation of food grade solvents for lipid extraction and impact of storage temperature on fatty acid composition of edible seaweeds Laminaria digitata (Phaeophyceae) and Palmaria palmata (Rhodophyta) Open
View article: Linking changes in nutrient source load to estuarine responses: an Irish perspective
Linking changes in nutrient source load to estuarine responses: an Irish perspective Open
In the Irish environment, anthropogenic pressures have led to widespread nutrient over-enrichment and eutrophication in surface waters. In the past 25 years European Directives have been implemented resulting in significant measures to imp…
View article: Connecting marine productivity to sea-spray via nanoscale biological processes: Phytoplankton Dance or Death Disco?
Connecting marine productivity to sea-spray via nanoscale biological processes: Phytoplankton Dance or Death Disco? Open
Bursting bubbles at the ocean-surface produce airborne salt-water spray-droplets, in turn, forming climate-cooling marine haze and cloud layers. The reflectance and ultimate cooling effect of these layers is determined by the spray’s water…