Sipuncula of the Magellan area compared with adjacent regions of Antarctica

The Magellan sipunculan fauna includes 4 families, 7 genera and 16 species. A comparison between this fauna and that from adjacent regions of Antarctica has been made. A total of 8 species and 3 genera are shared by the compared areas. Univariate analyses show no significant statistical differences...

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Bibliographic Details
Published in:Scientia Marina
Main Authors: Saiz-Salinas, J. I., Pagola-Carte, S.
Format: Article in Journal/Newspaper
Language:English
Published: Consejo Superior de Investigaciones Científicas 1999
Subjects:
Sipuncula
zoogeography
Magellan region
Antarctic Convergence
zoogeografía
región magallánica
Convergencia Antártica
Antarctic
The Antarctic
Antarc*
Antarctica
Antártica
Antártida
Online Access:https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/907
https://doi.org/10.3989/scimar.1999.63s1227
Description
Summary:The Magellan sipunculan fauna includes 4 families, 7 genera and 16 species. A comparison between this fauna and that from adjacent regions of Antarctica has been made. A total of 8 species and 3 genera are shared by the compared areas. Univariate analyses show no significant statistical differences among the investigated faunas, whereas a multivariate analysis corroborates that the effects of the Antarctic Convergence are stronger at the level of genera than species. Only 3 genera were able to cross over this zoogeographical boundary. However, these 3 genera succeeded in the new biotopes of Antarctica, since a total of 16 species have been recorded, compared with the 8 species only found in the Magellan region. La fauna magallánica de sipuncúlidos presenta 4 familias, 7 géneros y 16 especies. Se lleva a cabo una comparación entre esta fauna y la procedente de zonas adyacentes de la Antártida. Un total de 8 especies y 3 géneros están presentes en ambas zonas. Los resultados del análisis univariante indican la ausencia de diferencias estadísticas significativas entre las faunas investigadas, mientras que el análisis multivariante revela que los efectos de la Convergencia Antártica son más importantes a nivel de género que de especie. Sin embargo, estos géneros tuvieron cierto éxito en la colonización progresiva de los nuevos biotopos antárticos, dado que se han encontrado un total de 16 especies frente a las 8 exclusivas del área magallánica.

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