Bioactive and nutritional potential of Alaria esculenta and Saccharina latissima

2020 ◽  
Author(s):  
C. Afonso ◽  
J. Matos ◽  
I. Guarda ◽  
A. Gomes-Bispo ◽  
R. Gomes ◽  
...  
Keyword(s):  
Saccharina Latissima ◽  
Alaria Esculenta ◽  
Nutritional Potential

scholarly journals A Warmer Arctic Compromises Winter Survival of Habitat-Forming Seaweeds

2022 ◽  
Vol 8 ◽  
Author(s):  
Francisco J. L. Gordillo ◽  
Raquel Carmona ◽  
Carlos Jiménez
Keyword(s):  
Dark Period ◽  
Early Spring ◽  
The Arctic ◽  
Saccharina Latissima ◽  
Photosynthetic Parameters ◽  
Total N ◽  
Alaria Esculenta ◽  
Biomass Loss ◽  
Photosynthetic Potential ◽  
Species Specific

Continuous winter darkness at a latitude of 79°N was simulated in cultures of four species of Arctic seaweeds at 3 and 8°C. The laminarians Saccharina latissima and Alaria esculenta, and the rhodophytes Phycodrys rubens and Ptilota gunneri were monitored for 4 months in total darkness and after 1 week following light return in early spring, under controlled laboratory conditions. Biomass loss during darkness was enhanced by the high temperature in all species. At 8°C, the two laminarians were unable to resume growth upon re-illumination. Alaria esculenta showed new blade production by the end of the dark period, but only at 3°C. In all species, the photosynthetic ability was sustained, not suspended, during the whole dark period. P. rubens exhibited lower photosynthetic potential at 8°C than at 3°C during the darkness period, but it was able to recover its O2 evolving potential upon re-illumination, as P. gunneri and S. latissima did, but the latter only at 3°C. The reactivation of photosynthesis seemed to involve photosystem II over photosystem I, as 7 d of photoperiod after the prolonged darkness was not enough to fully recover the PAM-related photosynthetic parameters. Only small changes were recorded in the internal chemical composition (total C, total N, carbohydrates, proteins, and lipids), but species-specific differences were observed. Unlike subarctic areas with an operating photoperiod along the year, a warmer polar night might pose a limit to the ability of multi-year seaweeds to occupy the new ice-free illuminated areas of the Arctic coasts, so that newcomers will potentially be restricted to the spring-summer season.

scholarly journals Comparing the effectiveness of twine- and binder-seeding in the Laminariales species Alaria esculenta and Saccharina latissima

2020 ◽  
Vol 32 (4) ◽  
pp. 2173-2181
Author(s):  
Philip D. Kerrison ◽  
Mairi Innes ◽  
Adrian Macleod ◽  
Emily McCormick ◽  
Peter D. Elbourne ◽  
...  
Keyword(s):  
Biomass Yield ◽  
Saccharina Latissima ◽  
Seeding Density ◽  
Global Food Security ◽  
Innovative Methodology ◽  
Alaria Esculenta ◽  
Stipe Length ◽  
Intermediate Response ◽  
End Use ◽  
Global Food

Abstract The continuing expansion of seaweed cultivation could assist in ensuring future global food security. The Laminariales species Alaria esculenta and Saccharina latissima are each cultivated for food across their European ranges. The predominant method for cultivating European kelps involves growing juveniles on twine within a hatchery which is then deployed at a farm site. The associated hatchery and deployment cost of this approach are relatively high. A new and innovative methodology—called binder-seeding—can reduce these costs, but, has yet to be validated. We compare the biomass yield and morphology of A. esculenta and S. latissima cultured using either the traditional twine-longline method or binder-seeding onto AlgaeRope and AlgaeRibbon, specially designed textiles. In a controlled growth experiment, A. esculenta had a similar biomass yield on all materials, but fronds were shorter (23 ± 7%) and thinner on the AlgaeRibbon (42 ± 4%) due to a 3–4-fold higher density of developing sporophytes compared to the twine-longline. In contrast, S. latissima gave a 4-fold higher biomass yield on the AlgaeRibbon in June (4.0 kg m−1), but frond morphology was not different between materials, despite a 4-fold higher sporophyte density on the AlgaeRibbon. The stipe length of both species also increased at the higher sporophyte density on the AlgaeRibbon. The AlgaeRope gave an intermediate response or was similar to the twine-longline. These results show that binder-seeding onto the AlgaeRibbon significantly increases the achieved biomass yield in S. latissima. These results can assist cultivators to select the most appropriate method of kelp cultivation depending on morphological/yield requirements of the end use. Further study is needed on the optimisation of the binder-seeding density and its impact on thallus morphology.

scholarly journals Identification of fatty acids in fractionated lipid extracts from Palmaria palmata, Alaria esculenta and Saccharina latissima by off-line SPE GC-MS

2020 ◽  
Vol 32 (6) ◽  
pp. 4251-4262
Author(s):  
Lena Foseid ◽  
Ingeborg Natvik ◽  
Hanne Devle ◽  
Dag Ekeberg
Keyword(s):  
Fatty Acids ◽  
Neutral Lipids ◽  
Essential Fatty Acids ◽  
Saccharina Latissima ◽  
Palmaria Palmata ◽  
Omega 3 ◽  
Alpha Linolenic Acid ◽  
Alaria Esculenta ◽  
Lipid Fractions ◽  
Omega 6

AbstractThe fatty acid profiles of the three lipid fractions, neutral lipids (NL), free fatty acids and polar lipids (PL), from the macroalgae Palmaria palmata (wild), Alaria esculenta (cultivated) and Saccharina latissima (cultivated) were studied in light of dietary important fatty acids. Blade and stipe from the macroalgae were collected at the end of the growth season (May/June) at Frøya (Trøndelag, Norway). A total of 51 fatty acids were identified in the algae, including several fatty acids novel to one or more of the algae. The NL and PL fractions of P. palmata were the most promising from a health perspective, due to a high content of eicosapentaenoic acid (10.1 ± 0.5% and 6.6 ± 0.1%, respectively) and no trans-fatty acids. In addition, these fractions had very low omega-6/omega-3 ratios (< 0.1) and can therefore be beneficial for balancing the omega-6/omega-3 ratio in the diet. The NL fraction of A. esculenta had the highest content of monounsaturated- and polyunsaturated fatty acids (20.9 ± 1.4 and 21.8 ± 1.9% of alga, respectively), as well as the highest content of the two essential fatty acids, linoleic acid (5.3 ± 0.4% of alga) and alpha-linolenic acid (2.4 ± 0.2% of alga). Indices related to risk factors for coronary heart disease were most favourable in the NL fraction of S. latissima and the NL and PL fractions of A. esculenta.

Factors influencing hydroids (Cnidaria: Hydrozoa) biodiversity and distribution in Arctic kelp forest

2008 ◽  
Vol 88 (8) ◽  
pp. 1567-1575 ◽  
Author(s):  
Marta Ronowicz ◽  
Maria Wlodarska-Kowalczuk ◽  
Piotr Kuklinski
Keyword(s):  
Kelp Forest ◽  
Distribution Patterns ◽  
Sediment Concentration ◽  
Saccharina Latissima ◽  
Kelp Forests ◽  
Laminaria Digitata ◽  
Alaria Esculenta ◽  
Algal Host ◽  
A Site ◽  
West Spitsbergen

The biodiversity and distribution patterns of epiphytic hydroids were studied in kelp forests (composed of Laminaria digitata, Saccharina latissima and Alaria esculenta) located in an Arctic glaciated fiord (Hornsund, west Spitsbergen). In total, twenty-eight species were found colonizing algae, stones connected to holdfast, and overgrowing the surface of other animals associated with kelps. The characteristics of the algal host (e.g. algae species, age, rhizoid volume or biomass) did not show any effect upon hydroid species richness or species composition. High hydroid biodiversity was strongly dependent on microsubstrate heterogeneity. The highest biodiversity as well as frequency of hydroid occurrence were noted at a site located furthest from the glacier and characterized by the lowest sediment concentration and sedimentation rate. Sexual reproduction also seemed to be inhibited by glacier-derived disturbance. Of ten fertile species found at the ‘clearest’ site only two were fertile at sites under the strong influence of such perturbations. Potential physical drivers of species occurrence were linked to the activity of tidal glaciers, particularly to high loads of mineral sedimentation and iceberg scouring.

scholarly journals Nutritional value of the kelps Alaria esculenta and Saccharina latissima and effects of short-term storage on biomass quality

2017 ◽  
Vol 29 (5) ◽  
pp. 2417-2426 ◽  
Author(s):  
Pierrick Stévant ◽  
Hélène Marfaing ◽  
Turid Rustad ◽  
Ingrid Sandbakken ◽  
Joël Fleurence ◽  
...  
Keyword(s):  
Nutritional Value ◽  
Saccharina Latissima ◽  
Short Term ◽  
Biomass Quality ◽  
Alaria Esculenta ◽  
Short Term Storage ◽  
Term Storage

scholarly journals Arsenolipids are not uniformly distributed within two brown macroalgal species Saccharina latissima and Alaria esculenta

2019 ◽  
Vol 411 (19) ◽  
pp. 4973-4985 ◽  
Author(s):  
Ásta H. Pétursdóttir ◽  
Jonathan Blagden ◽  
Karl Gunnarsson ◽  
Andrea Raab ◽  
Dagmar B. Stengel ◽  
...  
Keyword(s):  
Saccharina Latissima ◽  
Macroalgal Species ◽  
Alaria Esculenta

scholarly journals Characterisation and chemometric evaluation of 17 elements in ten seaweed species from Greenland

2020 ◽  
Author(s):  
Katharina Johanna Kreissig ◽  
Lisbeth Truelstrup Hansen ◽  
Pernille Erland Jensen ◽  
Susse Wegeberg ◽  
Ole Geertz-Hansen ◽  
...  
Keyword(s):  
Geographic Origin ◽  
Saccharina Latissima ◽  
Palmaria Palmata ◽  
Food Ingredients ◽  
Seaweed Species ◽  
Fucus Distichus ◽  
Alaria Esculenta ◽  
The Family ◽  
Species Specific ◽  
The Eu

AbstractSeveral Greenland seaweed species have potential as foods or food ingredients, both for local consumption and export. However, knowledge regarding their content of beneficial and deleterious elements on a species specific and geographical basis is lacking. This study investigated the content of 17 elements (As, Ca, Cd, Cr, Cu, Fe, Hg, I, K, Mg, Mn, Na, Ni, P, Pb, Se and Zn) in 77 samples of ten species (Agarum clathratum, Alaria esculenta, Ascophyllum nodosum, Fucus distichus, Fucus vesiculosus, Hedophyllum nigripes, Laminaria solidungula, Palmaria palmata, Saccharina latissima and Saccharina longicruris). Element profiles differed between species but showed similar patterns within the same family. For five species, different thallus parts were investigated separately, and showed different element profiles. A geographic origin comparison of Fucus species indicated regional differences. The seaweeds investigated were especially good sources of macrominerals (K > Na > Ca > Mg) and trace minerals, such as Fe. Iodine contents were high, especially in macroalgae of the family Laminariaceae. None of the samples exceeded the EU maximum levels for Cd, Hg or Pb, but some exceeded the stricter French regulations, especially for Cd and I. In conclusion, these ten species are promising food items.

scholarly journals Characterisation and chemometric evaluation of 17 elements in ten seaweed species from Greenland

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0243672
Author(s):  
Katharina J. Kreissig ◽  
Lisbeth Truelstrup Hansen ◽  
Pernille Erland Jensen ◽  
Susse Wegeberg ◽  
Ole Geertz-Hansen ◽  
...  
Keyword(s):  
Geographic Origin ◽  
Saccharina Latissima ◽  
Palmaria Palmata ◽  
Food Ingredients ◽  
Seaweed Species ◽  
Fucus Distichus ◽  
Alaria Esculenta ◽  
The Family ◽  
Species Specific ◽  
The Eu

Several Greenland seaweed species have potential as foods or food ingredients, both for local consumption and export. However, knowledge regarding their content of beneficial and deleterious elements on a species specific and geographical basis is lacking. This study investigated the content of 17 elements (As, Ca, Cd, Cr, Cu, Fe, Hg, I, K, Mg, Mn, Na, Ni, P, Pb, Se and Zn) in 77 samples of ten species (Agarum clathratum, Alaria esculenta, Ascophyllum nodosum, Fucus distichus, Fucus vesiculosus, Hedophyllum nigripes, Laminaria solidungula, Palmaria palmata, Saccharina latissima and Saccharina longicruris). Element profiles differed between species but showed similar patterns within the same family. For five species, different thallus parts were investigated separately, and showed different element profiles. A geographic origin comparison of Fucus species indicated regional differences. The seaweeds investigated were especially good sources of macrominerals (K > Na > Ca > Mg) and trace minerals, such as Fe. Iodine contents were high, especially in macroalgae of the family Laminariaceae. None of the samples exceeded the EU maximum levels for Cd, Hg or Pb, but some exceeded the stricter French regulations, especially for Cd and I. In conclusion, these ten species are promising food items.

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