Seasonal diets of sheep in the steppe region of Tierra del Fuego, Argentina.
Sheep diets were determined seasonally for large flocks grazing year-round in 2 landscape types of the Magellanic steppe of Argentina. A tussock-grass steppe of Festuca gracillima Hooker f. dominates the uplands of the whole area. On acid soils (Quaternary landscape), woody variants of the steppe pr...
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1996
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ftunivarizonaojs:oai:journals.uair.arizona.edu:article/9080 2023-05-15T16:41:03+02:00 Seasonal diets of sheep in the steppe region of Tierra del Fuego, Argentina. Posse, G. Anchorena, J. Collantes, M.B. 1996-01-01 application/pdf https://journals.uair.arizona.edu/index.php/jrm/article/view/9080 eng eng Rangeland Ecology & Management / Journal of Range Management Archives https://journals.uair.arizona.edu/index.php/jrm/article/view/9080/8692 https://journals.uair.arizona.edu/index.php/jrm/article/view/9080 Rangeland Ecology & Management / Journal of Range Management Archives; Vol 49, No 1 (January 1996); 24-30 1550-7424 0022-409X tertiary sediments;festuca gracillima;Festuca;tussock grasslands;steppes;steppe soils;species diversity;diet;woody plants;sheep;seasonal variation;Argentina;canopy;forage info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1996 ftunivarizonaojs 2020-11-14T16:33:40Z Sheep diets were determined seasonally for large flocks grazing year-round in 2 landscape types of the Magellanic steppe of Argentina. A tussock-grass steppe of Festuca gracillima Hooker f. dominates the uplands of the whole area. On acid soils (Quaternary landscape), woody variants of the steppe prevail; on neutral soils (Tertiary landscape), woody plants are almost absent and short grasses and fortes are abundant. Principal taxa consumed throughout the year were: Poa L., Deschampsia P.Beauv., and "sedges &rushes". Consumption of woody species and of the dominant tussock-grass Festuca gracillima increased notably in winter. Despite the large proportion of species in common, diets differed significantly between landscapes. In the Quaternary landscape, which has a higher botanical diversity, diets were more dissimilar among seasons and had a higher annual diversity index. Because of their different composition of forage types the 2 landscapes differed in their overall grazing value. The Tertiary landscape, with a low floristic diversity but richer in highly preferred species as Poa spp. would be a more risky grazing area in winter, when an ice sheet or a snow cover limits harvesting of the lower layer of short grasses and forbs. Article in Journal/Newspaper Ice Sheet Tierra del Fuego Journals at the University of Arizona Argentina Hooker ENVELOPE(-62.050,-62.050,-63.283,-63.283) |
institution |
Open Polar |
collection |
Journals at the University of Arizona |
op_collection_id |
ftunivarizonaojs |
language |
English |
topic |
tertiary sediments;festuca gracillima;Festuca;tussock grasslands;steppes;steppe soils;species diversity;diet;woody plants;sheep;seasonal variation;Argentina;canopy;forage |
spellingShingle |
tertiary sediments;festuca gracillima;Festuca;tussock grasslands;steppes;steppe soils;species diversity;diet;woody plants;sheep;seasonal variation;Argentina;canopy;forage Posse, G. Anchorena, J. Collantes, M.B. Seasonal diets of sheep in the steppe region of Tierra del Fuego, Argentina. |
topic_facet |
tertiary sediments;festuca gracillima;Festuca;tussock grasslands;steppes;steppe soils;species diversity;diet;woody plants;sheep;seasonal variation;Argentina;canopy;forage |
description |
Sheep diets were determined seasonally for large flocks grazing year-round in 2 landscape types of the Magellanic steppe of Argentina. A tussock-grass steppe of Festuca gracillima Hooker f. dominates the uplands of the whole area. On acid soils (Quaternary landscape), woody variants of the steppe prevail; on neutral soils (Tertiary landscape), woody plants are almost absent and short grasses and fortes are abundant. Principal taxa consumed throughout the year were: Poa L., Deschampsia P.Beauv., and "sedges &rushes". Consumption of woody species and of the dominant tussock-grass Festuca gracillima increased notably in winter. Despite the large proportion of species in common, diets differed significantly between landscapes. In the Quaternary landscape, which has a higher botanical diversity, diets were more dissimilar among seasons and had a higher annual diversity index. Because of their different composition of forage types the 2 landscapes differed in their overall grazing value. The Tertiary landscape, with a low floristic diversity but richer in highly preferred species as Poa spp. would be a more risky grazing area in winter, when an ice sheet or a snow cover limits harvesting of the lower layer of short grasses and forbs. |
format |
Article in Journal/Newspaper |
author |
Posse, G. Anchorena, J. Collantes, M.B. |
author_facet |
Posse, G. Anchorena, J. Collantes, M.B. |
author_sort |
Posse, G. |
title |
Seasonal diets of sheep in the steppe region of Tierra del Fuego, Argentina. |
title_short |
Seasonal diets of sheep in the steppe region of Tierra del Fuego, Argentina. |
title_full |
Seasonal diets of sheep in the steppe region of Tierra del Fuego, Argentina. |
title_fullStr |
Seasonal diets of sheep in the steppe region of Tierra del Fuego, Argentina. |
title_full_unstemmed |
Seasonal diets of sheep in the steppe region of Tierra del Fuego, Argentina. |
title_sort |
seasonal diets of sheep in the steppe region of tierra del fuego, argentina. |
publisher |
Rangeland Ecology & Management / Journal of Range Management Archives |
publishDate |
1996 |
url |
https://journals.uair.arizona.edu/index.php/jrm/article/view/9080 |
long_lat |
ENVELOPE(-62.050,-62.050,-63.283,-63.283) |
geographic |
Argentina Hooker |
geographic_facet |
Argentina Hooker |
genre |
Ice Sheet Tierra del Fuego |
genre_facet |
Ice Sheet Tierra del Fuego |
op_source |
Rangeland Ecology & Management / Journal of Range Management Archives; Vol 49, No 1 (January 1996); 24-30 1550-7424 0022-409X |
op_relation |
https://journals.uair.arizona.edu/index.php/jrm/article/view/9080/8692 https://journals.uair.arizona.edu/index.php/jrm/article/view/9080 |
_version_ |
1766031491042639872 |