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Seaweed and Seaweed Bioactives for Mitigation of Enteric Methane: Challenges and Opportunities
Agr & Agri Food Canada, Lethbridge Res & Dev Ctr, 5403-1 Ave South, Lethbridge, AB T1J 4B1, Canada..
SINTEF Ind, Dept Biotechnol & Nanomed, N-7465 Trondheim, Norway..
Agr & Agri Food Canada, Lethbridge Res & Dev Ctr, 5403-1 Ave South, Lethbridge, AB T1J 4B1, Canada..ORCID iD: 0000-0002-5070-4554
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering.ORCID iD: 0000-0003-3745-4092
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2020 (English)In: Animals, E-ISSN 2076-2615, Vol. 10, no 12, article id 2432Article, review/survey (Refereed) Published
Abstract [en]

Simple Summary The need to become more efficient in agriculture and the food industry exists parallel to the challenge of climate change. Meat and dairy production is the target of much scrutiny due to methane (CH4) emissions and global warming. On the other hand, it should be noted that two-thirds of the world's agricultural land consists of pastures and permanent grasslands and is used for livestock grazing. This land is predominantly unsuitable for arable purposes but facilitates the production of high-quality human-edible protein in the form of ruminant animal-derived meat and milk. This makes a significant contribution to feeding the world's population. There is a need to reduce CH4 emissions, however, and several approaches are being researched currently. Seaweeds are diverse plants containing bioactives that differ from their terrestrial counterparts and they are increasingly under investigation as a feed supplement for the mitigation of enteric CH4. Seaweeds are rich in bioactives including proteins, carbohydrates and to a lesser extent lipids, saponins, alkaloids and peptides. These bioactives could also play a role as feed ingredients to reduce enteric CH4. This review collates information on seaweeds and seaweed bioactives and their potential to impact on enteric CH4 emissions. Seaweeds contain a myriad of nutrients and bioactives including proteins, carbohydrates and to a lesser extent lipids as well as small molecules including peptides, saponins, alkaloids and pigments. The bioactive bromoform found in the red seaweed Asparagopsis taxiformis has been identified as an agent that can reduce enteric CH4 production from livestock significantly. However, sustainable supply of this seaweed is a problem and there are some concerns over its sustainable production and potential negative environmental impacts on the ozone layer and the health impacts of bromoform. This review collates information on seaweeds and seaweed bioactives and the documented impact on CH4 emissions in vitro and in vivo as well as associated environmental, economic and health impacts.

Place, publisher, year, edition, pages
MDPI AG , 2020. Vol. 10, no 12, article id 2432
Keywords [en]
methane emissions, rumen, ruminants, seaweeds, bioactive components, bromoform, bacteriocins, peptides, carbohydrates, lipids, saponins, phlorotannins, alkaloids, animal studies, RUSITEC
National Category
Animal and Dairy Science
Identifiers
URN: urn:nbn:se:kth:diva-289083DOI: 10.3390/ani10122432ISI: 000602217400001PubMedID: 33353097Scopus ID: 2-s2.0-85098270532OAI: oai:DiVA.org:kth-289083DiVA, id: diva2:1521063
Note

QC 20210122

Available from: 2021-01-22 Created: 2021-01-22 Last updated: 2024-01-17Bibliographically approved

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Gröndahl, Fredrik

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