Variation in biochemical composition of  Saccharina latissima  and  Laminaria digitata  along an estuarine salinity gradient in inner Danish waters

Nielsen, Mette Møller; Manns, Dirk Martin; D’Este, Martina; Krause‐Jensen, Dorte; Rasmussen, Michael Bo; Larsen, Martin Mørk; Alvarado-Morales, Merlin; Angelidaki, Irini; Bruhn, Annette

doi:10.1016/j.algal.2015.12.003

Cited by 69 publications

(71 citation statements)

References 37 publications

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“…The chemical composition of macroalgae varies considerably between species and with season of harvest, growth habitat, and environmental conditions. Even within a small geographic area, growth rate and chemical composition may vary depending on, e.g., harvest season, sunlight, salinity, depth in the sea local water currents, or closeness to aquacultural plants . Reported ranges in proximate composition of brown, green, and red macroalgae are shown in Table .…”

Section: Chemical Composition Of Macroalgaementioning

confidence: 99%

“…Macroalgae contain varying levels of nutrients depending on species, season of harvest, geographic origin, and environmental conditions . The protein and nutritionally essential amino acids content can be rather low and variable, especially in brown macroalgae, when considered against the amino acid requirement of most aquacultural and terrestrial animal species.…”

Section: Introductionmentioning

confidence: 99%

“…Macroalgae contain varying levels of nutrients depending on species, season of harvest, geographic origin, and environmental conditions. [7][8][9][10][11][12] The protein and nutritionally essential amino acids content can be rather low and variable, especially in brown macroalgae, when considered against the amino acid requirement of most aquacultural and terrestrial animal species. The challenges of using macroalgae in animal feed include the high content of recalcitrant polysaccharide components such as alginates and carrageenans, which are not digested to any extent by monogastric animal species.…”

Section: Introductionmentioning

confidence: 99%

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Marine macroalgae as sources of protein and bioactive compounds in feed for monogastric animals

2018

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Marine macroalgae are considered as promising sustainable alternatives to conventional terrestrial animal feed resources. The advantages include high growth rate, potential cultivation in saltwater, and no occupation of arable land. Macroalgae are broadly classified as brown (Phaeophyta), red (Rhodophyta) and green (Chlorophyta) algae, and are a diverse group of marine organisms. The nutritional value of macroalgae is highly variable. The protein and essential amino acid content can be low, especially in brown species, and indigestible polysaccharides adversely affect the energy value. Optimal use of macroalgae in feeds requires suitable processing, and biorefinery approaches may increase protein content and improve nutrient availability. Macroalgae are rich in unique bioactive components and there is a growing interest in the potentially beneficial health effects of compounds such as laminarin and fucoidan in different macroalgal and macroalgal products. This review summarizes current literature on different aspects of the use of macroalgae as sources of protein and health-promoting bioactive compounds in feed for monogastric animal species.

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Section: Chemical Composition Of Macroalgaementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Marine macroalgae as sources of protein and bioactive compounds in feed for monogastric animals

2018

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“…Considering the maximum allowance of 40 ppm arsenic in seaweed meals and feed materials derived from seaweed (Directive 2002/32/EC) [10], seaweeds containing higher arsenic levels, in particular more than 2 ppm of inorganic arsenic, might have limited applications for food and feed production, as terrestrial livestock might not be able to fully metabolise inorganic arsenic. Removal of carbohydrates through enzymatic saccharification might represent a suitable option, as initially postulated by Nielsen et al [47], to reduce organically bound arsenic such as arseno-sugars and as a consequence enhance the use of seaweed residue as an animal feed additive.…”

Section: Ash and Metal Contentmentioning

confidence: 99%

The nutritional aspects of biorefined Saccharina latissima, Ascophyllum nodosum and Palmaria palmata

Schiener

SuFen

Theodoridou

et al. 2016

Biomass Conv. Bioref.

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that: • a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders. Please consult the full DRO policy for further details. Abstract The chemical profile of biorefined Saccharina latissima, Ascophylum nodosum and Palmaria palmata after carbohydrate and polyphenol extraction was analysed with the aim to evaluate the nutritional aspects of biorefined seaweeds as a novel animal feed supplement. Optimised enzymatic saccharification has been used to show that the protein concentration in the residue of Palmaria palmata and Ascophylum nodosum can be increased by more than two fold. Nutritional value of the residue was further enhanced through an increase in total amino acids and fatty acids. As a consequence of removal of inorganic elements such as sodium, potassium and chloride, the total solid and ash content of all three seaweeds was reduced by around 40%. In contrast, divalent metals such as iron and zinc, as well as silicon accumulated in all three residues. Potentially harmful components such as arsenic and iodine were reduced only in brown biorefined seaweeds, whilst in biorefined P. palmata iodine increased by 39% compared to a 24% decline of arsenic. Polyphenol removal in all three seaweeds was >80% and, in combination with enzymatic saccharification, enhanced protein recovery in A. nodosum. This highlights the potential of biorefinery concepts to generate multiple products from seaweed such as extracts enriched in polyphenols and carbohydrates and residue with higher protein and lipid content.

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“…The choice of including incineration and landfilling scenarios is based on the fact that seaweed biomass composition varies during the year and from place to place (Bruhn et al, 2016;Nielsen et al, 2016). It is therefore possible that the concentration of heavy metals may exceed the limit allowed for return to the soil as regulated by the European Sludge Directive (Sludge Directive 86/278/EEC) or Statutory Order no.…”

Section: Goal and Scopementioning

confidence: 99%

Bioextraction potential of seaweed in Denmark — An instrument for circular nutrient management

Seghetta

Tørring²,

Bruhn

et al. 2016

Science of The Total Environment

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The aim of the study is to assess the efficacy of seaweed for circular nutrient management to reduce eutrophication levels in the aquatic environment. We performed a comparative Life Cycle Assessment (LCA) of two reference waste management systems treating seaweed as biowaste, i.e. landfill disposal and combustion, and an alternative scenario using the seaweed Saccharina latissima as a resource for biobased fertilizer production. Life Cycle Impact Assessment (LCIA) methods were improved by using a cradle-to-cradle approach, quantifying fate factors for nitrogen and phosphorus loss from fertilized agriculture to the aquatic environment. We also differentiated between nitrogen- and phosphorus-limited marine water to improve the traditional freshwater impact category, making this indicator suitable for decision support in relation to coastal water management schemes. Offshore cultivation of Saccharina latissima with an average productivity of 150Mg/km(2) in Danish waters in 2014 was applied to a cultivation scenario of 208km(2). The bioresource scenario performs better than conventional biowaste management systems, delivering a net reduction in aquatic eutrophication levels of 32.29kgNeq. and 16.58kgPO4(3-)eq. per Mg (dry weight) of seaweed, quantified by the ReCiPe and CML impact assessment methods, respectively. Seaweed cultivation, harvest and reuse of excess nutrients from the aquatic environment is a promising approach for sustainable resource cycling in a future regenerative economy that exploits manmade emissions as a resource for closed loop biobased production while significantly reducing eutrophication levels in 3 out of 7 Danish river basin districts. We obtained at least 10% bioextraction of phosphorus manmade emissions (10%, 89% and >100%) and contributed significantly to local nitrogen reduction goals according to the Water Framework Directive (23%, 78% and >100% of the target).

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Variation in biochemical composition of Saccharina latissima and Laminaria digitata along an estuarine salinity gradient in inner Danish waters

Cited by 69 publications

References 37 publications

Marine macroalgae as sources of protein and bioactive compounds in feed for monogastric animals

Marine macroalgae as sources of protein and bioactive compounds in feed for monogastric animals

The nutritional aspects of biorefined Saccharina latissima, Ascophyllum nodosum and Palmaria palmata

Bioextraction potential of seaweed in Denmark — An instrument for circular nutrient management

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