Effect of the macroalgae Asparagopsis taxiformis on methane production and rumen microbiome assemblage
Breanna M. Roque,Charles G. Brooke,Joshua Ladau,Tamsen Polley,Lyndsey Jean Marsh,Negeen Najafi,Pramod Pandey,Latika Singh,Robert D. Kinley,Joan King Salwen,Emiley A. Eloe-Fadrosh,Ermias Kebreab,Matthias Hess +12 more
- Vol. 1, Iss: 1, pp 1-14
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Fermentation in a semi-continuous in-vitro rumen system suggests that A. taxiformis can reduce methane production from enteric fermentation in dairy cattle by 95% when added at a 5% OM inclusion rate without any obvious negative impacts on volatile fatty acid production.Abstract:
Recent studies using batch-fermentation suggest that the red macroalgae Asparagopsis taxiformis has the potential to reduce methane (CH4) production from beef cattle by up to ~ 99% when added to Rhodes grass hay; a common feed in the Australian beef industry. These experiments have shown significant reductions in CH4 without compromising other fermentation parameters (i.e. volatile fatty acid production) with A. taxiformis organic matter (OM) inclusion rates of up to 5%. In the study presented here, A. taxiformis was evaluated for its ability to reduce methane production from dairy cattle fed a mixed ration widely utilized in California, the largest milk producing state in the US. Fermentation in a semi-continuous in-vitro rumen system suggests that A. taxiformis can reduce methane production from enteric fermentation in dairy cattle by 95% when added at a 5% OM inclusion rate without any obvious negative impacts on volatile fatty acid production. High-throughput 16S ribosomal RNA (rRNA) gene amplicon sequencing showed that seaweed amendment effects rumen microbiome consistent with the Anna Karenina hypothesis, with increased β-diversity, over time scales of approximately 3 days. The relative abundance of methanogens in the fermentation vessels amended with A. taxiformis decreased significantly compared to control vessels, but this reduction in methanogen abundance was only significant when averaged over the course of the experiment. Alternatively, significant reductions of CH4 in the A. taxiformis amended vessels was measured in the early stages of the experiment. This suggests that A. taxiformis has an immediate effect on the metabolic functionality of rumen methanogens whereas its impact on microbiome assemblage, specifically methanogen abundance, is delayed. The methane reducing effect of A. taxiformis during rumen fermentation makes this macroalgae a promising candidate as a biotic methane mitigation strategy for dairy cattle. But its effect in-vivo (i.e. in dairy cattle) remains to be investigated in animal trials. Furthermore, to obtain a holistic understanding of the biochemistry responsible for the significant reduction of methane, gene expression profiles of the rumen microbiome and the host animal are warranted.read more
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The future of food from the sea.
Christopher Costello,Ling Cao,Stefan Gelcich,Miguel A. Cisneros-Mata,Christopher M. Free,Halley E. Froehlich,Christopher D. Golden,Gakushi Ishimura,Jason Maier,Ilan Macadam-Somer,Tracey Mangin,Michael C. Melnychuk,Masanori Miyahara,Carryn L De Moor,Rosamond L. Naylor,Linda Nøstbakken,Elena Ojea,Erin O’Reilly,Ana M. Parma,Andrew J. Plantinga,Shakuntala H. Thilsted,Jane Lubchenco +21 more
TL;DR: Modelled supply curves show that, with policy reform and technological innovation, the production of food from the sea may increase sustainably, perhaps supplying 25% of the increase in demand for meat products by 2050.
Journal ArticleDOI
Global and regional drivers of land-use emissions in 1961–2017
Chaopeng Hong,Jennifer Burney,Julia Pongratz,Julia Pongratz,Julia E. M. S. Nabel,Nathaniel D. Mueller,Robert B. Jackson,Steven J. Davis +7 more
TL;DR: In this paper, the authors present country-, process-, GHG- and product-specific inventories of global land-use emissions from 1961 to 2017, decompose key demographic, economic and technical drivers of emissions and assess the uncertainties and the sensitivity of results to different accounting assumptions.
Journal ArticleDOI
Mitigating the carbon footprint and improving productivity of ruminant livestock agriculture using a red seaweed
Robert D. Kinley,Gonzalo Martinez-Fernandez,Melissa K. Matthews,Rocky de Nys,Marie Magnusson,Marie Magnusson,Nigel William Tomkins +6 more
TL;DR: In this paper, marine red macroalga (seaweed) Asparagopsis taxiformis was used as a feed ingredient to eliminate enteric methane in cattle fed a high grain diet and provide evidence of improved livestock production performance.
Journal ArticleDOI
Blue Growth Potential to Mitigate Climate Change through Seaweed Offsetting.
TL;DR: The extent and cost of scaling seaweed aquaculture to provide sufficient CO2eq sequestration for several climate change mitigation scenarios are assessed, with a focus on the food sector-a major source of greenhouse gases.
Journal ArticleDOI
Red seaweed (Asparagopsis taxiformis) supplementation reduces enteric methane by over 80 percent in beef steers
Breanna M. Roque,Marielena E. Venegas,Robert D. Kinley,Rocky de Nys,Toni L. Duarte,Xiang Yang,Ermias Kebreab +6 more
TL;DR: In this article, the effect of Asparagopsis taxiformis on CH4 production (g/day per animal), yield (g CH4/kg dry matter intake (DMI)), and intensity (g HC4/ kg ADG); average daily gain (ADG; kg gain/day), feed conversion efficiency (FCE; kg ADGs/kg DMI), and carcass and meat quality in growing beef steers were determined.
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