Incomplete degradation of lichen usnic acid and atranorin in Svalbard reindeer (Rangifer tarandus platyrhynchus)

摘要: Previous studies of Eurasian tundra reindeer (Rangifer tarandus tarandus) in Norway indicate that their rumen microbiota play a key role degrading lichen secondary metabolites. We investigated the presence usnic acid and atranorin faecal samples from Svalbard reindeer (R. platyrhynchus). Samples were collected Bolterdalen valley together with vegetation study site. The mesic this area was dominated by vascular plants (59% cover). Bryophytes (16%) lichens (25%) also present. Qualitative quantitative analyses faeces performed using high-performance liquid chromatography. Contents averaged 12.49 ± 0.41 mg g–1in thalli of Stereocaulon alpinum, while average level lowest in Cladonia mitis (12.75 2.86 g–1) highest in Flavocetraria cucullata (34.87 0.47 g–1). Atranorin detected samples, averaging 0.53 0.74 1.11 (mean SD) g–1 dry matter, respectively. compounds shows are indeed included diet, although probably small amounts because depleted pastures. Contrary to previous findings on mainland Norway, not completely degraded or absorbed reindeer. To elucidate mechanisms behind detoxification reindeer, more research is needed respective microbiomes digestive enzymes.