INVESTIGADORES
RIVERA Luis Osvaldo
artículos
Título:
Patterns of taxonomic and functional diversity of birds in riparian forests with natural and agricultural matrices in the Argentine Austral Yungas
Autor/es:
GOMEZ, DANIELA; RUGGERA, ROMÁN A.; RIVERA, LUIS O.; POLITI, NATALIA
Revista:
IBIS
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Año: 2021
ISSN:
0019-1019
Resumen:
Birds represent a diverse group that responds markedly to changes in the structural characteristics of their habitat. In this study, we evaluated the response of birds to changesgenerated by the landscape anthropization in riparian forests of the Austral Yungas.These forests are vulnerable to unnatural disturbances and are within an ecoregion thathas a high risk of degradation due to historical and current land use changes. Based onthe hypothesis of environmental heterogeneity, we investigated how taxonomic andfunctional diversity of bird assemblages were related to structural variables of riparianforests and the matrix type (native forest or crop) in which they are immersed. Throughdirect observations and captures using mist-nets, we determined bird species richnessand abundance, and measured quantitative functional traits in eight riparian forests inthe piedmont forest of the Austral Yungas in Argentina. We also calculated four functionaldiversity indexes and measured structural variables of the forests. Bird speciesoccupied a functional space in a uniform way, particularly in riparian forests immersedin a crop matrix, which tend to be structurally homogeneous; that is, in riparian forestswhere there is an increase in disturbances, the Functional Evenness values are higher.Changes in land use determine changes in the composition of bird assemblages and mayresult in the non-random loss of functionally unique species.