Papers by Alejandro Brown
Mountain Research and Development, 1997
... The study area is located in the administrative depart-ment of Santa Victoria, in the Provinc... more ... The study area is located in the administrative depart-ment of Santa Victoria, in the Province of Salta, Argen-tina (Figure 1). Four townships were selected for this study: Los Toldos (1,600 m); Arazay (1,650 m); Lipeo (1,300 m); and Baritfi (1,700 m). During the period 1972-1989 ...
Mammalian Biology - Zeitschrift für Säugetierkunde, 2013
We conducted a 55-day long camera-trap survey in the Yungas subtropical forest in NW Argentina, t... more We conducted a 55-day long camera-trap survey in the Yungas subtropical forest in NW Argentina, to assess the effect of human accessibility, conservation status of the area, domestic animals and elevation on the diversity and composition of the large and medium-sized native terrestrial mammal assemblage. We deployed 24 camera-trap stations at distances of ∼2 km from each other. The study area is covered by continuous forest and has its center in the small community of Acambuco, in the Acambuco Provincial Reserve. The main economic activity in the area is oil/gas exploitation. Local residents raise cattle, hunt and use timber and non-timber forest products. The human impact was indirectly measured with an accessibility cost model. We used a multiple regression ANCOVA to assess the effect of elevation (range: 628-1170 masl), accessibility, protection status (reserve vs not) and frequency of records of domestic animals on the native mammal species richness and on a nonmetric multidimensional scaling (NMDS) ordination based on the frequency of records of the native mammals recorded at >3 camera-trap stations. We recorded 15 species of native mammals. Native mammal species richness decreased with elevation. Elevation was correlated with NMDS axes. Other predictive variables had no effect on species richness or the NMDS ordination, probably as a result of the relatively narrow range of conditions assessed in this study. The effect of elevation on mammal assemblages should be considered in landscape planning processes aimed at promoting biodiversity conservation.
The Upper Bermejo River Basin (UBRB) is the most bio-diverse region in Argentina. A rugged territ... more The Upper Bermejo River Basin (UBRB) is the most bio-diverse region in Argentina. A rugged territory and a long history of human settlement, combined with social and political isolation, have resulted in large areas with well-preserved forests, a large number of wild plant and ...
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Papers by Alejandro Brown