Microhabitat use and density of sigmodontine rodents in Spartina densiflora freshwater marshes, Argentina
We analyzed the influence of habitat heterogeneity and population density on the microhabitat use of four sigmodontine rodents : Akodon azarae, Oligoryzomys flavescens, Scapteromys tumidus and Oxymycterus rufus. Rodents were livetrapped over a period of 2 years in 9,600 m2 rectangular grid (24 trap...
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todo:paper_00251461_v67_n3_p367_Bonaventura2023-10-03T14:35:31Z Microhabitat use and density of sigmodontine rodents in Spartina densiflora freshwater marshes, Argentina Bonaventura, S.M. Pancotto, V. Madanes, N. Vicari, R. Argentina Freshwater marshes Microhabitat use Population fluctuations Sigmodontine rodents habitat use heterogeneity interspecific interaction intraspecific interaction marsh microhabitat population density rodent Argentina South America Akodon Akodon azarae Akodon azarae Oligoryzomys Oligoryzomys flavescens Oligoryzomys flavescens Oxymycterus Oxymycterus rufus Oxymycterus rufus Rodentia Scapteromys tumidus Scapteromys tumidus Spartina Spartina densiflora Spartina densiflora We analyzed the influence of habitat heterogeneity and population density on the microhabitat use of four sigmodontine rodents : Akodon azarae, Oligoryzomys flavescens, Scapteromys tumidus and Oxymycterus rufus. Rodents were livetrapped over a period of 2 years in 9,600 m2 rectangular grid (24 trap stations). In the first year, abundance, residence and reproduction of rodents were associated with elevated flood-protected microhabitats, both with high plant cover (A. azarae, O. flavescens and S. tumidus) and intermediate plant cover (O. rufus). Morphological swimming adaptations may account the abundance and large number of resident and reproductive individuals of S. tumidus in flooded microhabitats with low plant cover. During the second year, no differences in microhabitat use were found among rodent species. We suggest that the observed interannual changes in rodent microhabitat use are a consequence of increased intra- and interspecific interactions associated with the increased abundance of A. azarae and O. flavescens during the second year. Variations in microhabitat use are not independent of weather conditions. Thus, the increased abundances of A azarae and O. flavescens were associated with the warm autumn-winter and the rainy spring-summer periods of the second year. The decreased abundance of S. tumidus may have resulted from the dry spring-summer period of the first year. Fil:Pancotto, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Madanes, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00251461_v67_n3_p367_Bonaventura |
| institution |
Universidad de Buenos Aires |
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I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentina Freshwater marshes Microhabitat use Population fluctuations Sigmodontine rodents habitat use heterogeneity interspecific interaction intraspecific interaction marsh microhabitat population density rodent Argentina South America Akodon Akodon azarae Akodon azarae Oligoryzomys Oligoryzomys flavescens Oligoryzomys flavescens Oxymycterus Oxymycterus rufus Oxymycterus rufus Rodentia Scapteromys tumidus Scapteromys tumidus Spartina Spartina densiflora Spartina densiflora |
| spellingShingle |
Argentina Freshwater marshes Microhabitat use Population fluctuations Sigmodontine rodents habitat use heterogeneity interspecific interaction intraspecific interaction marsh microhabitat population density rodent Argentina South America Akodon Akodon azarae Akodon azarae Oligoryzomys Oligoryzomys flavescens Oligoryzomys flavescens Oxymycterus Oxymycterus rufus Oxymycterus rufus Rodentia Scapteromys tumidus Scapteromys tumidus Spartina Spartina densiflora Spartina densiflora Bonaventura, S.M. Pancotto, V. Madanes, N. Vicari, R. Microhabitat use and density of sigmodontine rodents in Spartina densiflora freshwater marshes, Argentina |
| topic_facet |
Argentina Freshwater marshes Microhabitat use Population fluctuations Sigmodontine rodents habitat use heterogeneity interspecific interaction intraspecific interaction marsh microhabitat population density rodent Argentina South America Akodon Akodon azarae Akodon azarae Oligoryzomys Oligoryzomys flavescens Oligoryzomys flavescens Oxymycterus Oxymycterus rufus Oxymycterus rufus Rodentia Scapteromys tumidus Scapteromys tumidus Spartina Spartina densiflora Spartina densiflora |
| description |
We analyzed the influence of habitat heterogeneity and population density on the microhabitat use of four sigmodontine rodents : Akodon azarae, Oligoryzomys flavescens, Scapteromys tumidus and Oxymycterus rufus. Rodents were livetrapped over a period of 2 years in 9,600 m2 rectangular grid (24 trap stations). In the first year, abundance, residence and reproduction of rodents were associated with elevated flood-protected microhabitats, both with high plant cover (A. azarae, O. flavescens and S. tumidus) and intermediate plant cover (O. rufus). Morphological swimming adaptations may account the abundance and large number of resident and reproductive individuals of S. tumidus in flooded microhabitats with low plant cover. During the second year, no differences in microhabitat use were found among rodent species. We suggest that the observed interannual changes in rodent microhabitat use are a consequence of increased intra- and interspecific interactions associated with the increased abundance of A. azarae and O. flavescens during the second year. Variations in microhabitat use are not independent of weather conditions. Thus, the increased abundances of A azarae and O. flavescens were associated with the warm autumn-winter and the rainy spring-summer periods of the second year. The decreased abundance of S. tumidus may have resulted from the dry spring-summer period of the first year. |
| format |
JOUR |
| author |
Bonaventura, S.M. Pancotto, V. Madanes, N. Vicari, R. |
| author_facet |
Bonaventura, S.M. Pancotto, V. Madanes, N. Vicari, R. |
| author_sort |
Bonaventura, S.M. |
| title |
Microhabitat use and density of sigmodontine rodents in Spartina densiflora freshwater marshes, Argentina |
| title_short |
Microhabitat use and density of sigmodontine rodents in Spartina densiflora freshwater marshes, Argentina |
| title_full |
Microhabitat use and density of sigmodontine rodents in Spartina densiflora freshwater marshes, Argentina |
| title_fullStr |
Microhabitat use and density of sigmodontine rodents in Spartina densiflora freshwater marshes, Argentina |
| title_full_unstemmed |
Microhabitat use and density of sigmodontine rodents in Spartina densiflora freshwater marshes, Argentina |
| title_sort |
microhabitat use and density of sigmodontine rodents in spartina densiflora freshwater marshes, argentina |
| url |
http://hdl.handle.net/20.500.12110/paper_00251461_v67_n3_p367_Bonaventura |
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