Fjölrit RALA - 05.12.1999, Page 59

Fjölrit RALA - 05.12.1999, Page 59
OsvaldoA. Fernández et al. 57 Aguiar, M.R., Soriano, A. and Sala, O.E. 1992. Competition and facilitation in the recruitment of seedlings in the Patagonian steppe. Funct. Ecol. 6, 66-70. Allegretti, L.L, Passera, C.B. and Robles, A.B. 1997. Short-and long-term effects of shrub manage- ment on vegetation in the Monte, Argentina. J. Arid Environ. 35, 685-693. Anderson, D.L. 1977. Las causas de la invasión del chanar en el área medanosa de pastizales e isletas de chanar. In: Limitación en la Produccion Ganadera de San Luis debido a ias Lenosas Invasoras. Agencia Extensión Rural San Luis. Instituto Nacional de Tecnología Agropecuaria, San Luis, Argen- tina. Aronson, J. and Saravia Toledo, C. 1992. Caesalpinia paraguariensis (Fabaceae); forage tree for all seasons. Economic Botany 46, 121-132. Balmaceda, N.A. 1979. Vegetación. In: Estudio de clima, geomorfología, suelos, vegetación y ero- sión. Bull. Ministerio de Agricultura, Ganadería y Minería, Rio Negro, Argentina, 74—93. Bertiller, M-B., Beeskow, A.M. and Irisarri, M.P. 1977. Caracteres fisonómicos y florísticos de las unidades de vegetación del Chubut. IDIA 35, 247-296. Bertiller, M.B., Beeskow, A.M. and Irisarri, M.P. 1981a. Caracteres fisonómicos y florísticos de la vegetación del Chubut. 1. Sierra de San Bernardo, llanura y valle aluvial del río Senguer, Pampa de Maria Santísima, Valle Hermoso y Pampa del Castillo. Contribución No. 40. Centro Nac. Patagónico, Puerto Madryn, Argentina. Bertiller, M.B., Beeskow, A.M. and Irisarri, M.P. 1981b. Caracteres fisonómicos y florísticos de la vegetación del Chubut. 2. La Peninsula Valdés y el Istmo Ameghino. Contribución No. 41. Centro Nac. Patagónico, Puerto Madryn, Argentina. Bocher, T.W., Hjerting, J.P. and Rahn, K. 1972. Botanical studies in the Atuel valley area, Mendoza Province, Argentina. Part 111. Dan. Bot. Ark. 22, 195-358. Branch, L.C. 1993a. Social organization and mating system of the plains viscacha (Lagostomus maximus). J. Zool. 229, 473—491. Branch, L.C. 1993b. Intergroup and intragroup spacing in the plains vizcacha, Lagostomus aximus. J. Mamm. 74, 890-900. Branch, L.C. 1995. Observations of predation by pumas and Geoffroy’s cats on the plains vizcacha in semi-arid scrub of central Argentina. Mammalia 59, 152-156. Branch, L.C. and Sosa, R.A. 1994. Foraging behavior of the plains vizcacha, Lagostomus maximus (Rodentia:Chinchillidae), in semi-arid scrub of central Argentina. Vida Silv. Neotrop. 3, 96-99. Branch, L.C., Villarreal, D. and Fowler, G.S. 1994a. Factors influencing population dynamics of the plains viscacha (Lagostomus maximus, Mammalia, Chinchillidae) in scrub habitat of central Argen- tina.J.Zool. 232, 383-395. Branch, L.C., Villarreal, D., Pelliza Sbriller, A. and Sosa, R.A. 1994b. Diet selection of the plains vizcacha (Lagostomus maximus, family Chinchillidae) in relation to resource bundance in semi-arid scrub. Can. J. Zooi. 72, 2210-2216. Branch, L.C., Villarreal, D., Sosa, A., Pessino, M., Machicote, M., Lerner, P., Borraz, P., Urioste, M. and Hierro, J.L. 1994c. Estructura de las colonias de vizcacha y problemas asociados con la estima- ción de la densidad poblacional en base a Ia actividad de las vizcacheras. Mastozoología Neotrop. 1, 135-142. Branch, L.C., Villarreal, D., Hierro, J.L. and Portier, K.M. 1996. Effects of local extinction of the plains vizcacha (Lagostomus maximus) on vegetation pattems in semi-arid scrub. Oecologia 106, 389-399. Busso, C.A. 1997. Towards an increased and sustainable production in semi-arid rangelands of central Argentina: Two decades of research. J. Arid Environ. 36, 197-210.
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