Influence of environmental factors and sheep grazing on an Andean grassland

Journal of Range Management

Volumn 52, Issue 5, 1999, Pages 471-481

  Adler, Peter B ^a   Morales, Juan Manuel ^b,c  

^a Department of Environmental and Radiological Health Sciences   (United States)

^b NORTH CAROLINA STATE UNIVERSITY   (United States)

^c UNIVERSIDAD NACIONAL DE TUCUMÁN   (Argentina)

Author keywords

Andes; Grazing effects; Ordination; Pastoralism; Plant ecology

Indexed keywords

ENVIRONMENTAL FACTOR; GRAZING; GRAZING MANAGEMENT; PRODUCTIVITY; SHEEP;

ANIMALIA; OVIS ARIES;

EID: 0032885003     PISSN: 0022409X     EISSN: None     Source Type: Journal    
DOI: 10.2307/4003774     Document Type: Article

References (48)

1. Archer, S. 1989. Have southern Texas savannas been converted to woodlands in recent history? Amer. Natur. 134:545-561.
2. Bartolome, J.W. 1993. Applications of herbivore optimization theory to rangelands of the western United States. Ecol. Appl. 3:27-29.
3. Belsky, A.J. 1992. Effects of grazing, competition, disturbance, and fire on species composition and diversity in grassland communities. J. Veg. Sci. 3:187-200.
4. Bertiller, M.B. 1994. Modelos ecológicos alternativas de la dinámica de la vegetatción en ecosistemas de pastizales: Un caso de estudio en la Patagonia. Revista Argentina de Producción Animal 14:15-23.
5. Bianchi, A.R. 1981. Las Precipitaciones en el Noreoeste Argentino. Instituto Nacional de Tecnologia Agropecuaria (INTA), Salta, Argentina.
6. Biondini, M.E. and L. Manske. 1996. Grazing frequency and ecosystem processes in a northern mixed prairie, U.S.A. Ecol. Appl., 6:239-256.
7. Biswell, H.H. 1956. Ecology of Californian grasslands. J. of Range Manage. 9:19-24.
8. Borcard, D., P. Legendre, and P. Drapeau. 1992. Partialling out the spatial component of ecological variation. Ecol. 73:1045-1055.
9. Bork, E.W., N.E. West, and J.W. Walker. 1998. Cover components of long-term seasonal sheep grazing treatments on three tip sagebrush steppe. J. Range Manage. 51:293-300.
10. Browman, D.L. 1987. Agro-pastoral risk management in the Central Andes. Res. in Eco. Anthro. 8:171-200.
11. Brown, A.D. and H.R. Grau. 1993. La Naturaleza y el Hombre en las Selvas de Montaña Proyecto GTZ, Salta, Argentina.
12. Brown, J.R. and J.W. Stuth. 1993. How herbivory affects grazing tolerant and sensitive grasses in a central Texas grassland: Integrating plant response across hierarchical levels. Oikos 67:291-298.
13. Cabrera, A.L. 1977-1983. Flora de la Provincia de Jujuy, Repulica Argentina. Instituto Nacional de Tecnologia Agropecuaria, Buenos Aires.
14. dePietri, D.E. 1992. The search for ecological indicators: is it possible to biomonitor forest system degradation caused by cattle ranching activities in Argentina? Vegetatio 101:109-121.
15. Eckholm, E.P. 1975. The deterioration of mountain environments. Sci. 189:764-770.
16. Ellenburg, H. 1979. Man's influence on tropical mountain ecosystems in South America. J. of Ecol. 67:401-416.
17. Ellis, J.E. and D.M. Swift. 1988. Stability of African pastoral ecosystems: Alternate paradigms and implications for development. J. Range Manage. 41:450-459.
18. Fernandez, J. R., J. C. Lazaro, and T. H. Flores. 1992. Guia de Germoplasma de Pastos Nativos Andinos, Puno, Peru.
19. Fjeldsa, J. and M. Kessler. 1996. Conserving the Polylepis Woodlands of the Highland of Peru and Bolivia. A Contribution to Sustainable Natural Resource Management in the Andes. NORDECO, Copenhagen, Denmark.
20. Harden, C.P. 1993. Land-use, soil erosion, and reservoir sedimentation in an Andean, drainage basin in Ecuador. Mountain Res. and Development 13:177-184.
21. Heady, H.F. and R.D. Child. 1994. Rangeland Ecology and Management. Westview Press, San Francisco, Calif.
22. Jongman, R.H.G., C.J.F. ter Braak, and O.F.R. van Tongeren. 1987. Data analysis in community and landscape ecology. Pudoc, Wageningen.
23. Lavorel, S., J.D. Lebreton, M. Debussche, and J. Lepart. 1991. Nested spatial patterns in seed bank and vegetation of Mediterranean old-fields. J. Veg. Sci. 2:367-376.
24. LeBaron, A., L.L. Bond, P. Aitken, and L. Michaelsen . 1979. An explanation of the Bolivian highlands grazing-erosion syndrome. J. Range Manage. 32:201-208.
25. McIntyre, S. and S. Lavorel. 1994. How environmental and disturbance factors influence species composition in temperate Australian grasslands. J. Veg Sci 5:373-384.
26. Mendiola, M.Q. 1996. Sistema de Pastoreo y Capacidad de Carga Animal en la Comunidad de San Isidro, Departamento de Iruya, Salta. Consejo de Investigación. Universidad Nacional de Salta, Salta, Argentina.
27. Milchunas, D.G. and W.K. Lauenroth. 1993. Quantitative effects of grazing on vegetation and soils over a global range of environments. Ecol. Monogr. 63:327-366.
28. Molinillo, M.F. 1993. Is traditional pastoralism the cause of erosive processes in mountain environments? The case of the Cumbres Calchaquies in Argentina. Mountain Res. and Development 13:189-202.
29. Molinillo, M. and M. Monasterio. 1997 Pastoralism in paramo environments: practices, forage, and impact on vegetation in the Cordillera of Merida, Venezuela. Mountain Res. and Development 17:197-211.
30. Nadir, A. 1990. Los suelos del N.O.A. (Salta y Jujuy). Prensa de la Universidad Nacional de Salta, Salta.
31. Noy -Meir, I., M. Gutman, and Y. Kaplan. 1989. Responses of mediterranean grassland plants to grazing and protection. J. of Ecol 77:290-310.
32. Okland, R.H. and O. Eilertsen. 1994. Canonical Correspondence Analysis with variation partitioning: some comments and an application. J. Veg. Sci. 5:117-126.
33. Parker, E.G. and H.A. Alzérreca. 1978. Range plant species and range potential on the Bolivian Altiplano. Utah State University, Dept. of Range Science, Logan, Ut.
34. Reboratti, C. 1996. Sociedad, Desarollo, y Ambiente en la Alta Cuenca del Rio Bermejo. Universidad de Buenos Aires.
35. Ruthsatz, B. and U. Fisel. 1984. The utilization of natural resources by a small community on the highlands of Bolivia and its effects on vegetation cover and site conditions. Erdwissenschaftliche Forschung XVIII:211-234.
36. ter Braak, C.J.F. 1987. The analysis of vegetation-environment relationships by canonical correspondence analysis. Vegetatio 69:69-77.
37. ter Braak, C.J F. 1990a. Update notes: CANOCO version 3.10. Agricultural Mathematics Group, Wageningen, 35 pp.
38. ter Braak, C.J.F. 1990b. Interpreting canonical correlation analysis through biplots of structural correlations and weights. Psychometrika 55:521-531.
39. ter Braak, C.J.F. and I.C. Prentice. 1988. A theory of gradient analysis. Advances in Ecol. Res. 18:271-317.
40. Tilman, D. 1990. Constraints and tradeoffs: toward a predictive theory of competition and succession. Oikos 58:3-15.
41. Turner, M. 1993. Overstocking the range: a critical analysis of the environmental science of Sahelian pastoralism. Econ. Geography 69:402-421.
42. Viera, O. and M. Menéndez. 1981. Estudio geológico, geomorfológico y de vegetación de los Ríos Nazareno, Iruya e Izcuya en la provincia de Salta. Viera y Menéndez Consultores, 51 pp., Salta, Argentina.
43. Walkley, A. and I.A. Black. 1934. An examination of the Degtjareff method for determining soil organic matter and a proposed modification of the chromic acid titration method. Soil Sci. 37:29-38.
44. Warren, S.D., T.L. Thurow, W.H. Blackburn and N.E. Garza. 1986. The influence of livestock trampling under intensive rotation grazing on soil hydrologic characteristics. J. Range Manage. 39:491-495.
45. West, N.E. 1988. Intermountain deserts, shrub steppes, and woodlands. Pages 210-230 in M.G. Barbour and W.D. Billings, eds. North American Terrestrial Vegetation. Cambridge University Press, New York.
46. Westoby, M., B. Walker, and I. Noy-Meir. 1989. Opportunistic management for rangelands not at equilibrium. J. Range Manage. 42:266-274.
47. Wiens, J.A. 1984. On understanding a non-equilibrium world: Myth and reality in community patterns and processes. In: D.R. Strong, Jr. and A.B. Thistle (eds.). Ecological Communities: Conceptual Issues and the Evidence. Princeton University Press, Princeton, N.J.
48. Wilcox, B.P., F.C. Bryant, and V.B. Fraga. 1987. An evaluation of range condition on one range site in the Andes of central Peru. J. Range Manage. 40:41-45.