NDLI: Methane emissions are lower from reindeer fed lichens compared to a concentrate feed

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Volume 37, 2018

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Occurrence of Ulva lactuca L. 1753 (Ulvaceae, Chlorophyta) at the Murman Сoast of the Barents Sea

Methane emissions are lower from reindeer fed lichens compared to a concentrate feed

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Methane emissions are lower from reindeer fed lichens compared to a concentrate feed

Content Provider	Taylor & Francis Online
Author	Sundset, Monica Alterskjær Nilsen, Marte Mathiesen, Svein D. Folkow, Lars P. Hansen, Kia Krarup
Abstract	Methane emissions from reindeer (Rangifer tarandus tarandus) fed lichens (mainly Cladonia stellaris) and a concentrate feed were determined using open-circuit respirometry. The lichen diet was low in crude protein (< 2.6% of dry matter [DM]), starch (6.0% DM) and acid detergent lignin (2.0% DM) compared to the concentrate feed (12.7, 22.5 and 7.2% DM, respectively), and high in neutral detergent fibre (82.2% DM versus 34.8% DM in concentrate feed). The feeds were offered in equal amounts (ca. 0.440 kg DM) 2 h after initiating methane recordings in the respiration chamber. The reindeer were adapted to these diets for > 4 weeks prior to experiments and methane emissions recorded for two separate 23 h periods for each diet. Methane emissions increased on average by 0.93 g/h (or by 5.8 times) in the first hour after feeding the concentrate feed, while emissions remained unchanged after the intake of lichens. Mean methane emissions from reindeer (n = 5) were 7.5 ± 0.54 (SE) g CH4 day−1 when fed lichens, compared to a higher emission (p = 0.001) of 11.2 ± 0.54 g CH4 day−1 on the concentrate diet. The mean proportion of gross energy intake lost as methane was 5.2 ± 0.37% on the lichens and 7.6 ± 0.37%, or some 50% higher, on the concentrate feed. This difference was significant (p < 0.001). Our results suggest that it is of environmental importance to preserve the lichens on the tundra and minimize supplementary feeding with concentrate diets, in order to reduce methane emission.
File Format	PDF HTM / HTML
ISSN	17518369
DOI	10.1080/17518369.2018.1505396
Journal	Polar Research
Volume Number	37
Issue Number	1
Language	English
Publisher	Routledge
Publisher Date	2018-10-19
Access Restriction	Open
Subject Keyword	Respirometry Dietary secondary compounds Energy loss Rangifer tarandus AIC: Akaike Information Criterion DMI: dry matter intake GEI: gross energy intake RO: ruminantium-olleyae clade SGMT: smithii-gottschalkii-millerae-thaueri clade STPD: standard temperature and pressure dry UiT: UiT—The Arctic University of Norway
Content Type	Text
Resource Type	Article
Subject	1900/1901 Environmental Chemistry Environmental Science Oceanography

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