In this paper, we studied the relationships between ecobiogeography and historical biogeography, based on Sicily’s population of Scarab dung beetles (Geotrupidae and Scarabaeidae).We based the island’s ecogeographic partition on its floristic districts and subdistricts (Brullo et al., 1995).We applied some techniques of biodiversity analysis to the study of I and II order chorotypes (Bellucci et al., 2007; Zunino, 2005, 2007). Species and groups found correspond to 14 chorotypes of I order and to 22 of II order, differently represented and distributed in the sample. The !, and " diversities were studied with both hierarchical levels of chorology. The obtained results, using different indexes, confirm Sicily’s landscape heterogeneity. # diversity does not refute the proposed phytogeographic island’s partition in districts. The analysis of the districts’ similitude, on the other hand, seems to refute the hierarchically superior partition in subsectors. In fact, all the calculated indexes agree on grouping districts that in the phytogeographic classification belong to different subsectors. Therefore, with the comparative analysis of the I order chorotypes, the synchronic relations of the studied Sicilian faunistic component are discussed. Finally, through the analysis of the II order chorotypes, considered as spaces that are occupied by panbiogeographic tracks, the relationships of the Sicilian Scarab beetles are examined with a historical biogeography standpoint, suggesting hypotheses of primary biogeographic homologies. From the same analysis, it becomes satisfactorily clear that Sicily is included in more than one panbiogeographic node, and that this is evidence of its involvement in allotopic and allochronic biogeographic histories.

Parametri biogeografici della Biodiversità. Struttura e rapporti del popolamento siculo a Scarabeidi degradatori (Coleoptera, Scarabaeoidea).

AGOGLITTA, ROSSANA;ZUNINO, MARIO ENRICO
2011

Abstract

In this paper, we studied the relationships between ecobiogeography and historical biogeography, based on Sicily’s population of Scarab dung beetles (Geotrupidae and Scarabaeidae).We based the island’s ecogeographic partition on its floristic districts and subdistricts (Brullo et al., 1995).We applied some techniques of biodiversity analysis to the study of I and II order chorotypes (Bellucci et al., 2007; Zunino, 2005, 2007). Species and groups found correspond to 14 chorotypes of I order and to 22 of II order, differently represented and distributed in the sample. The !, and " diversities were studied with both hierarchical levels of chorology. The obtained results, using different indexes, confirm Sicily’s landscape heterogeneity. # diversity does not refute the proposed phytogeographic island’s partition in districts. The analysis of the districts’ similitude, on the other hand, seems to refute the hierarchically superior partition in subsectors. In fact, all the calculated indexes agree on grouping districts that in the phytogeographic classification belong to different subsectors. Therefore, with the comparative analysis of the I order chorotypes, the synchronic relations of the studied Sicilian faunistic component are discussed. Finally, through the analysis of the II order chorotypes, considered as spaces that are occupied by panbiogeographic tracks, the relationships of the Sicilian Scarab beetles are examined with a historical biogeography standpoint, suggesting hypotheses of primary biogeographic homologies. From the same analysis, it becomes satisfactorily clear that Sicily is included in more than one panbiogeographic node, and that this is evidence of its involvement in allotopic and allochronic biogeographic histories.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11576/2511758
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact