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| Guidobono, J.S.; Cueto, G.R.; Teta, P.; Busch, M. | |
| Effect of environmental factors on the abundance variations of two native rodents in agricultural system of Buenos Aires, Argentina | |
| 2018 Austral Ecology (44): 36-48 | |
Our aim was to assess the effect of environmental factors on short temporal abundance variations of the two most abundant native rodents of agricultural agroecosystems, _Akodon azarae _and _Calomys laucha_. We conducted a 3-year longitudinal sampling of rodents, and recorded meteorological data such as temperature and precipitation, predation rate by_ Leopardus geoffroyi_,_ Tyto furcata _and _Athene cunicularia_, vegetation cover and height, characteristics of cropfields and their borders. The effect of these factors on rodent abundance was evaluated through generalized linear mixed models. Abundance variations of both rodent species were explained by characteristics of both cropfields and their borders. At the studied temporal scale, meteorological variables did not have a direct effect on abundance variations, but probably influenced through vegetation characteristics and were expressed in seasonal variations. For A. azarae there was also an effect of predation by _L. geoffroyi_ (positive) and _T. furcata _(negative), while predation by_ A. cunicularia _did not contribute to explain abundance variations of any species. |
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