Artículo
On the position of Uruguay in the South American biogeographical puzzle: insights from Ephemeroptera (Insecta)
Dos Santos, Daniel Andrés
; Emmerich, Daniel; Molineri, Carlos
; Nieto, Carolina; Dominguez, Eduardo
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
02/2016
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Journal Of Biogeography
e-ISSN:
1365-2699
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Aim: To study the relationships between Uruguay and neighbouring geographical areas based on distributions of Ephemeroptera species (mayflies: an ancient order of aquatic insects). We wanted to evaluate whether Uruguay more closely represents (1) the southern limit of the tropical (Paranense and Amazonian) fauna or (2) the northern limit of the temperate (Pampean-Bonaerense) fauna.
Location: South America with an emphasis on Uruguay.
Methods: We compiled more than 5000 collection records of mayfly species throughout South America and evaluated these using current taxonomy and geographical validity. We used the Network Analysis Method (NAM) on these data to identify units of co-occurrence (UCs: mutually exclusive groups of co-distributed species, with each group connected through strong links of sympatry and disconnected from the others). We focused solely on those UCs that included Uruguay in their spatial ranges and used these to infer the vicinity relationships.
Results: We recovered four UCs consisting of many species that link Uruguay with tropical areas of Brazil and NE Argentina. These groups followed a geographically nested pattern. The results contradict the previously held view that the Uruguayan fauna holds strong affinities to that of temperate grasslands that lie to the south in central oriental Argentina (i.e. the currently accepted concept of Pampas). A comparison of the genera known from Uruguay and Buenos Aires Province further reinforces the distinction between Uruguay and temperate areas to the south.
Main conclusions: The hypothesis that Uruguay represents the southern limit of tropical affinities is strongly supported by mayfly distributions, indicating that a reappraisal of the Pampas as a cohesive biogeographical province is needed. We suggest that Uruguay and Buenos Aires should belong to different provinces, the former aligned with tropical provinces and the latter aligned with more temperate areas.
Palabras clave:
Ephemeroptera
,
Neotropics
,
Network Analysis
,
Pampas
,
Paranense
,
Regionalization
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - NOA SUR)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - NOA SUR
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - NOA SUR
Articulos(IBN)
Articulos de INSTITUTO DE BIODIVERSIDAD NEOTROPICAL
Articulos de INSTITUTO DE BIODIVERSIDAD NEOTROPICAL
Citación
Dos Santos, Daniel Andrés; Emmerich, Daniel; Molineri, Carlos; Nieto, Carolina; Dominguez, Eduardo; On the position of Uruguay in the South American biogeographical puzzle: insights from Ephemeroptera (Insecta); Wiley Blackwell Publishing, Inc; Journal Of Biogeography; 43; 2; 2-2016; 361–371
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