Habitat Preference and Forage Consumption by Reindeer and Caribou near Atkasook, Alaska
Robert G. White,Jeanette Trudell +1 more
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Habitat preference by caribou and forage selection and consumption by tame reindeer (Rangifer tarandusgrantii Allen) were studied near Atkasook, Alaska, for 3 years as mentioned in this paper.Abstract:
Habitat preference by caribou (Rangifer tarandusgrantii Allen.) and forage selection and consumption by tame reindeer (R. t. tarandus L.) were studied near Atkasook, Alaska, for 3 yr. Small groups ...read more
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Carbon/nutrient balance of boreal plants in relation to vertebrate herbivory
TL;DR: Fundamental differences between the response of woody plants and graminoids to vertebrate herbivory suggest that the dynamics of browsing systems and grazing systems are qualitatively different.
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Plant phenology and the benefits of migration in a temperate ungulate
Steve D. Albon,Rolf Langvatn +1 more
TL;DR: Seasonal changes in crude protein content of graminoids and herbs grazed by red deer were monitored and the relationships between protein content, date and altitude were used to estimate the quality of the diet of twelve radio-collared female red deer that migrated to summer ranges in the mountains.
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Steppe-Tundra Transition: A Herbivore-Driven Biome Shift at the End of the Pleistocene
TL;DR: Results indicate that mammalian grazers have a sufficiently large effect on vegetation and soil moisture that their extinction could have contributed substantially to the shift from predominance of steppe to tundra at the Pleistocene-Holocene boundary.
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Foraging patterns and their multiplier effects on productivity of northern ungulates
TL;DR: Analysis of some aspects of selective feeding behavior and its possible influence on animal production finds that an increase by 14% in bodyweight of young female reindeer during summer results in a 35% increase in the probability of conception in autumn, which may influence populations through control over conception rate and survival during winter.
References
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A two-stage technique for the in vitro digestion of forage crops
J. M. A. Tilley,R. A. Terry +1 more
TL;DR: A simple technique for the determination in vitro of the dry- or organic-matter digestibility of small (0·5 g) samples of dried forages is described, which involves incubation first with rumen liquor and then with acid pepsin.
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W. L. Grovum,Vernon J. Williams +1 more
TL;DR: With increasing intakes of food, increases were observed along the entire large intestine in the amounts of wet digesta present, in the transit rates of digesta and in the rates of absorption of water.
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The ecological role of secondary lichen substances
TL;DR: Considerable evidence supports the hypothesis that many lichen secondary substances have significant ecological roles, and secondary chemistry may be important in determining the relative ecological success of individual lichen species and thus the structure and diversity of natural lichen communities.