Does habitat specificity by frugivorous birds result in uneven seed rain within Bolivian mixed plantations?
Small-scale habitat specificity by frugivorous birds might affect their patterns of use of space and, consequently, may influence the range of habitats over which seeds are disseminated. These differences may translate into non-redundancy among bird assemblages using different habitats. I tested this hypothesis by capturing birds in two habitats within shaded mixed plantations in a Bolivian Andean forest (plantation interior and plantation edges with the forest matrix) and comparing the seeds found in their droppings. I found that, despite differences in bird assemblage composition and activity, the overall seed rain was similar among habitats: the seed rain in edges was only slightly richer in species than in the plantation interior, but species composition did not differ significantly between habitats. Although some seed species showed a biased distribution among habitats that might be partially explained by habitat specificity of frugivorours birds, the overall relative importance of seed species in the seed rain was similar for both habitats. These findings suggest that even when bird assemblages differ among habitats, from the plant community perspective these assemblages might be ecologically redundant.
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Asociación Argentina de Ecología
2013
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rev-ecoaus-article-11922023-11-02T19:01:14Z Does habitat specificity by frugivorous birds result in uneven seed rain within Bolivian mixed plantations? La especificidad de hábitat por aves frugívoras ¿resulta en diferentes lluvias de semillas dentro de cultivos tradicionales bolivianos? Montaño-Centellas, Flavia A. agriculture dropping Miconia ornitochory redundancy richness seed dispersal agricultura fecas Miconia ornitocoria redundancia riqueza dispersión de semillas Small-scale habitat specificity by frugivorous birds might affect their patterns of use of space and, consequently, may influence the range of habitats over which seeds are disseminated. These differences may translate into non-redundancy among bird assemblages using different habitats. I tested this hypothesis by capturing birds in two habitats within shaded mixed plantations in a Bolivian Andean forest (plantation interior and plantation edges with the forest matrix) and comparing the seeds found in their droppings. I found that, despite differences in bird assemblage composition and activity, the overall seed rain was similar among habitats: the seed rain in edges was only slightly richer in species than in the plantation interior, but species composition did not differ significantly between habitats. Although some seed species showed a biased distribution among habitats that might be partially explained by habitat specificity of frugivorours birds, the overall relative importance of seed species in the seed rain was similar for both habitats. These findings suggest that even when bird assemblages differ among habitats, from the plant community perspective these assemblages might be ecologically redundant. En paisajes fragmentados, las aves frugívoras pueden mostrar especificidad de hábitat a pequeñas escalas pudiendo, por ejemplo, utilizar o evadir los bordes entre parches de cultivo y la matriz boscosa que los rodea. Estos patrones de uso podrían afectar el rango de hábitats en que estas aves depositan las semillas que dispersan, generando diferentes lluvias de semillas y resultando en ensambles de aves ecológicamente no redundantes. En este trabajo examiné esta hipótesis comparando la lluvia de semillas generada por aves en el interior y en el borde de plantaciones mixtas, en un paisaje en mosaico de los Andes bolivianos donde las plantaciones constituyen pequeños parches de hábitat rodeados por una matriz de bosque húmedo montano. Para esto, identifiqué las semillas en las fecas de aves capturadas con redes de niebla en ambos hábitats a lo largo de un año. Pese a las diferencias de actividad de aves entre hábitats, la diversidad de semillas fue similar entre el interior y el borde. Aunque la lluvia de semillas en borde fue ligeramente más rica en especies que en interior, la composición de especies no varió significativamente entre estos hábitats. Algunas especies de semillas mostraron una distribución sesgada (i.e., fueron depositadas más frecuentemente en uno de los dos hábitats) que puede ser parcialmente explicada por las diferencias en actividad de frugívoros. Sin embargo, la importancia relativa de las especies de plantas dentro de la lluvia de semillas en ambos hábitats fue similar. Estos resultados sugieren que los ensambles de aves pueden resultar ecológicamente redundantes aún si difieren entre hábitats cercanos. Asociación Argentina de Ecología 2013-04-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Communications Comunicaciones application/pdf https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1192 10.25260/EA.13.23.1.0.1192 Ecología Austral; Vol. 23 No. 1 (2013): April 2013, Pages 1-76; 55-61 Ecología Austral; Vol. 23 Núm. 1 (2013): April 2013, Pages 1-76; 55-61 1667-782X 0327-5477 eng https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1192/583 Derechos de autor 2020 Flavia A. Montaño-Centellas https://creativecommons.org/licenses/by/3.0/ |
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Montaño-Centellas, Flavia A. |
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Montaño-Centellas, Flavia A. Does habitat specificity by frugivorous birds result in uneven seed rain within Bolivian mixed plantations? |
| author_facet |
Montaño-Centellas, Flavia A. |
| author_sort |
Montaño-Centellas, Flavia A. |
| title |
Does habitat specificity by frugivorous birds result in uneven seed rain within Bolivian mixed plantations? |
| title_short |
Does habitat specificity by frugivorous birds result in uneven seed rain within Bolivian mixed plantations? |
| title_full |
Does habitat specificity by frugivorous birds result in uneven seed rain within Bolivian mixed plantations? |
| title_fullStr |
Does habitat specificity by frugivorous birds result in uneven seed rain within Bolivian mixed plantations? |
| title_full_unstemmed |
Does habitat specificity by frugivorous birds result in uneven seed rain within Bolivian mixed plantations? |
| title_sort |
does habitat specificity by frugivorous birds result in uneven seed rain within bolivian mixed plantations? |
| description |
Small-scale habitat specificity by frugivorous birds might affect their patterns of use of space and, consequently, may influence the range of habitats over which seeds are disseminated. These differences may translate into non-redundancy among bird assemblages using different habitats. I tested this hypothesis by capturing birds in two habitats within shaded mixed plantations in a Bolivian Andean forest (plantation interior and plantation edges with the forest matrix) and comparing the seeds found in their droppings. I found that, despite differences in bird assemblage composition and activity, the overall seed rain was similar among habitats: the seed rain in edges was only slightly richer in species than in the plantation interior, but species composition did not differ significantly between habitats. Although some seed species showed a biased distribution among habitats that might be partially explained by habitat specificity of frugivorours birds, the overall relative importance of seed species in the seed rain was similar for both habitats. These findings suggest that even when bird assemblages differ among habitats, from the plant community perspective these assemblages might be ecologically redundant. |
| publisher |
Asociación Argentina de Ecología |
| publishDate |
2013 |
| url |
https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1192 |
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