Responses of birds to planting of Lotus tenuis pasture in the Flooding Pampas, Argentina

摘要: The Flooding Pampas is the most important livestock region of Argentina, but a where replacement originally natural, perennial tussock grasses by pasture species changing heterogeneity grassland system. We evaluated response bird assemblages to planting Lotus tenuis (Lotus) pasture, which mainly modifies vegetation structure reducing vertical heterogeneity. Species richness and abundance birds were compared between fields semi-natural grasslands. Avian both greater in than pasture. When grouped nesting habits (grassland specialists, generalists), specialists was grassland, whereas generalist An indicator-species analysis showed that five closely linked vegetation, with two those – Hudson’s Canastero (Asthenes hudsoni) Bay-capped Wren-Spinetail (Spartonoica maluroides) conservation concern.1 In contrast, species, such as Southern Lapwings (Vanellus chilensis) Burrowing Owls (Athene cunicularia), associated Planting has negative effects on naturally occur grassland. Grassland management methods, intercropping rotational grazing, could help reconcile production Pampas.