Seasonal Changes in Microhabitat Use and Niche Overlap between Akodon azarae and Calomys laucha (Rodentia, Muridae) in Agroecosystems of Central Argentina.
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| Title: | Seasonal Changes in Microhabitat Use and Niche Overlap between Akodon azarae and Calomys laucha (Rodentia, Muridae) in Agroecosystems of Central Argentina. |
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| Authors: | Bilenca, David N.1, Kravetz, Fernando O.1 |
| Source: | Studies on Neotropical Fauna & Environment. Dec99, Vol. 34 Issue 3, p129-136. 8p. |
| Subjects: | Akodon, Calomys, Ecological niche, Habitat selection |
| Geographic Terms: | Argentina |
| Abstract: | We examined seasonal changes in microhabitat use by the murid rodents Akodon azarae and Calomys laucha in agroecosystems of the former pampa region of Argentina. In summer, trap data showed that both species had low densities and were almost equally distributed between the mature cropfields and their surrounding weedy borders. Analysis of vegetation at the trap sites revealed no selection for microhabitats at the borders, whereas in the cropfields both species shared preferences for covered microhabitats. In contrast, winter data revealed a sharp habitat segregation, being Calomys numerically dominant in post-harvest cropfields and Akodon more abundant in borders. Moreover, there were clear differences in microhabitat selection at the borders, A. azarae occupying the more covered microhabitats and C. laucha the less covered. Breadth and overlap of niches were calculated using principal component analysis, in order to recognize interspecific competition and its influence on community niche space. Available evidence indicates that the structure of this rodent community is strongly influenced by seasonal changes in habitat stucture and rodent abundance. The socially dominant A. azarae retains the best part of the available niche space, a fact becoming more evident under the harsh winter conditions. [ABSTRACT FROM AUTHOR] |
| Copyright of Studies on Neotropical Fauna & Environment is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 4589329 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Seasonal Changes in Microhabitat Use and Niche Overlap between Akodon azarae and Calomys laucha (Rodentia, Muridae) in Agroecosystems of Central Argentina. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Bilenca%2C+David+N%2E%22">Bilenca, David N.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kravetz%2C+Fernando+O%2E%22">Kravetz, Fernando O.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Studies+on+Neotropical+Fauna+%26+Environment%22">Studies on Neotropical Fauna & Environment</searchLink>. Dec99, Vol. 34 Issue 3, p129-136. 8p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Akodon%22">Akodon</searchLink><br /><searchLink fieldCode="DE" term="%22Calomys%22">Calomys</searchLink><br /><searchLink fieldCode="DE" term="%22Ecological+niche%22">Ecological niche</searchLink><br /><searchLink fieldCode="DE" term="%22Habitat+selection%22">Habitat selection</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Argentina%22">Argentina</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: We examined seasonal changes in microhabitat use by the murid rodents Akodon azarae and Calomys laucha in agroecosystems of the former pampa region of Argentina. In summer, trap data showed that both species had low densities and were almost equally distributed between the mature cropfields and their surrounding weedy borders. Analysis of vegetation at the trap sites revealed no selection for microhabitats at the borders, whereas in the cropfields both species shared preferences for covered microhabitats. In contrast, winter data revealed a sharp habitat segregation, being Calomys numerically dominant in post-harvest cropfields and Akodon more abundant in borders. Moreover, there were clear differences in microhabitat selection at the borders, A. azarae occupying the more covered microhabitats and C. laucha the less covered. Breadth and overlap of niches were calculated using principal component analysis, in order to recognize interspecific competition and its influence on community niche space. Available evidence indicates that the structure of this rodent community is strongly influenced by seasonal changes in habitat stucture and rodent abundance. The socially dominant A. azarae retains the best part of the available niche space, a fact becoming more evident under the harsh winter conditions. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Studies on Neotropical Fauna & Environment is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1076/snfe.34.3.129.8913 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 129 Subjects: – SubjectFull: Akodon Type: general – SubjectFull: Calomys Type: general – SubjectFull: Ecological niche Type: general – SubjectFull: Habitat selection Type: general – SubjectFull: Argentina Type: general Titles: – TitleFull: Seasonal Changes in Microhabitat Use and Niche Overlap between Akodon azarae and Calomys laucha (Rodentia, Muridae) in Agroecosystems of Central Argentina. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Bilenca, David N. – PersonEntity: Name: NameFull: Kravetz, Fernando O. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec99 Type: published Y: 1999 Identifiers: – Type: issn-print Value: 01650521 Numbering: – Type: volume Value: 34 – Type: issue Value: 3 Titles: – TitleFull: Studies on Neotropical Fauna & Environment Type: main |
| ResultId | 1 |
