Seed preferences in sparrow species of the Monte desert, Argentina: Implications for seed-granivore interactions
We assessed seed preference in four species of sparrows that are common to the central Monte desert of Argentina. Our hypotheses are that (1) sparrows always prefer grass over forb seeds and (2) different species of sparrows show the same preferences when consuming seeds. We presented seeds from eig...
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2006
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00048038_v123_n2_p358_Cueto http://hdl.handle.net/20.500.12110/paper_00048038_v123_n2_p358_Cueto |
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paper:paper_00048038_v123_n2_p358_Cueto2023-06-08T14:29:39Z Seed preferences in sparrow species of the Monte desert, Argentina: Implications for seed-granivore interactions Argentina Feeding experiments Granivory Neotropical Emberizidae bird feeding behavior foraging behavior granivory grass seed Argentina Mendoza Monte Desert South America Aves Emberizinae Parthenium hysterophorus Passeridae Poaceae Sporobolus cryptandrus Zonotrichia capensis We assessed seed preference in four species of sparrows that are common to the central Monte desert of Argentina. Our hypotheses are that (1) sparrows always prefer grass over forb seeds and (2) different species of sparrows show the same preferences when consuming seeds. We presented seeds from eight species of plants (four grasses and four forbs) in both choice and nonchoice experiments. In general, sparrow species preferred grass over forb seeds, though one of them (Rufous-collared Sparrow [Zonotrichia capensis]) included one forb species (Parthenium hysterophorus) among its preferred seed items. Among grass seeds, sparrows avoided or showed less preference for the tiny seeds of Sporobolus cryptandrus, which suggests that seed weight may affect seed choice among grasses. Avoidance of most forb species, by contrast, could not be associated with seed size, probably because of the presence of unpalatable or toxic compounds in forb seeds. Experimental evidence suggests that the main feeding pressure of sparrows is clearly directed to grass seeds, which coincides with reported information on bird diet. Results support assertions that sparrows can cause a negative effect on the composition and abundance of grass seeds in the soil seed-bank, a necessary condition for birds in playing a significant role on grass population dynamics in the central Monte desert of Argentina. © The American Ornithologists' Union, 2006. Printed in USA. 2006 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00048038_v123_n2_p358_Cueto http://hdl.handle.net/20.500.12110/paper_00048038_v123_n2_p358_Cueto |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentina Feeding experiments Granivory Neotropical Emberizidae bird feeding behavior foraging behavior granivory grass seed Argentina Mendoza Monte Desert South America Aves Emberizinae Parthenium hysterophorus Passeridae Poaceae Sporobolus cryptandrus Zonotrichia capensis |
| spellingShingle |
Argentina Feeding experiments Granivory Neotropical Emberizidae bird feeding behavior foraging behavior granivory grass seed Argentina Mendoza Monte Desert South America Aves Emberizinae Parthenium hysterophorus Passeridae Poaceae Sporobolus cryptandrus Zonotrichia capensis Seed preferences in sparrow species of the Monte desert, Argentina: Implications for seed-granivore interactions |
| topic_facet |
Argentina Feeding experiments Granivory Neotropical Emberizidae bird feeding behavior foraging behavior granivory grass seed Argentina Mendoza Monte Desert South America Aves Emberizinae Parthenium hysterophorus Passeridae Poaceae Sporobolus cryptandrus Zonotrichia capensis |
| description |
We assessed seed preference in four species of sparrows that are common to the central Monte desert of Argentina. Our hypotheses are that (1) sparrows always prefer grass over forb seeds and (2) different species of sparrows show the same preferences when consuming seeds. We presented seeds from eight species of plants (four grasses and four forbs) in both choice and nonchoice experiments. In general, sparrow species preferred grass over forb seeds, though one of them (Rufous-collared Sparrow [Zonotrichia capensis]) included one forb species (Parthenium hysterophorus) among its preferred seed items. Among grass seeds, sparrows avoided or showed less preference for the tiny seeds of Sporobolus cryptandrus, which suggests that seed weight may affect seed choice among grasses. Avoidance of most forb species, by contrast, could not be associated with seed size, probably because of the presence of unpalatable or toxic compounds in forb seeds. Experimental evidence suggests that the main feeding pressure of sparrows is clearly directed to grass seeds, which coincides with reported information on bird diet. Results support assertions that sparrows can cause a negative effect on the composition and abundance of grass seeds in the soil seed-bank, a necessary condition for birds in playing a significant role on grass population dynamics in the central Monte desert of Argentina. © The American Ornithologists' Union, 2006. Printed in USA. |
| title |
Seed preferences in sparrow species of the Monte desert, Argentina: Implications for seed-granivore interactions |
| title_short |
Seed preferences in sparrow species of the Monte desert, Argentina: Implications for seed-granivore interactions |
| title_full |
Seed preferences in sparrow species of the Monte desert, Argentina: Implications for seed-granivore interactions |
| title_fullStr |
Seed preferences in sparrow species of the Monte desert, Argentina: Implications for seed-granivore interactions |
| title_full_unstemmed |
Seed preferences in sparrow species of the Monte desert, Argentina: Implications for seed-granivore interactions |
| title_sort |
seed preferences in sparrow species of the monte desert, argentina: implications for seed-granivore interactions |
| publishDate |
2006 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00048038_v123_n2_p358_Cueto http://hdl.handle.net/20.500.12110/paper_00048038_v123_n2_p358_Cueto |
| _version_ |
1768545534794006528 |