Albano, Paolo Giulio
(2011)
Molluscs of the marine protected area "Secche di Tor Paterno"
, [Dissertation thesis], Alma Mater Studiorum Università di Bologna.
Dottorato di ricerca in
Biodiversità ed evoluzione - biodiversity and evolution, 23 Ciclo. DOI 10.6092/unibo/amsdottorato/3531.
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Abstract
The thesis describes the molluscan biodiversity of the infralittoral off-shore reefs in the "Secche di Tor Paterno" marine protected area lying in the Central Tyrrhenian Sea off the coasts of Lazio south of Roma. Data originate from underwater sampling activities carried out by SCUBA diving in four biocoenoses: Posidonia oceanica leaves and rhizomes, coralligenous concretions and detritic pools. The representativeness of molluscs as descriptors of biocoenoses is evaluated by preliminary comparisons with data about Polychaeta, Pleocyemata (Crustacea) and Brachiopoda obtained in the same survey. The malacocoenoses of the four biocoenoses are treated in detail. Then data are compared with other data sets to assess differences and similarities with other communities. The agreement between death and living assemblages in the reefs is evaluated for the Posidonia oceanica and the coralligenous biocoenosis and was carried out by a set of standard metrics and some benthic ecology methods.
Molluscs perform very well as descriptors of biocoenoses, better than the other phyla. The molluscan assemblages of the reefs are very rich in species despite richness is mainly concentrated in the coralligenous and in the rhizomes of Posidonia oceanica. The leaves of Posidonia oceanica host a rather poor assemblage. Detritic pools host a poor but peculiar species assemblage. The dead-live agreement showed that death assemblages are highly representative of sediments of nearby biocoenoses as a result of low bottom transport. Fidelity metrics suggest a good agreement between the living and death assemblages when species richness and taxonomic composition are considered. The study suggests that fidelity is lower when considering the species dominance. These differences could be associated to the trophism of species and possibly to the species life span.
Abstract
The thesis describes the molluscan biodiversity of the infralittoral off-shore reefs in the "Secche di Tor Paterno" marine protected area lying in the Central Tyrrhenian Sea off the coasts of Lazio south of Roma. Data originate from underwater sampling activities carried out by SCUBA diving in four biocoenoses: Posidonia oceanica leaves and rhizomes, coralligenous concretions and detritic pools. The representativeness of molluscs as descriptors of biocoenoses is evaluated by preliminary comparisons with data about Polychaeta, Pleocyemata (Crustacea) and Brachiopoda obtained in the same survey. The malacocoenoses of the four biocoenoses are treated in detail. Then data are compared with other data sets to assess differences and similarities with other communities. The agreement between death and living assemblages in the reefs is evaluated for the Posidonia oceanica and the coralligenous biocoenosis and was carried out by a set of standard metrics and some benthic ecology methods.
Molluscs perform very well as descriptors of biocoenoses, better than the other phyla. The molluscan assemblages of the reefs are very rich in species despite richness is mainly concentrated in the coralligenous and in the rhizomes of Posidonia oceanica. The leaves of Posidonia oceanica host a rather poor assemblage. Detritic pools host a poor but peculiar species assemblage. The dead-live agreement showed that death assemblages are highly representative of sediments of nearby biocoenoses as a result of low bottom transport. Fidelity metrics suggest a good agreement between the living and death assemblages when species richness and taxonomic composition are considered. The study suggests that fidelity is lower when considering the species dominance. These differences could be associated to the trophism of species and possibly to the species life span.
Tipologia del documento
Tesi di dottorato
Autore
Albano, Paolo Giulio
Supervisore
Co-supervisore
Dottorato di ricerca
Scuola di dottorato
Scienze biologiche, biomediche e biotecnologiche
Ciclo
23
Coordinatore
Settore disciplinare
Settore concorsuale
Parole chiave
Mollusca, ecology, biodiversity, conservation, Posidonia oceanica, coralligenous, detritic pools, Secche di Tor Paterno
URN:NBN
DOI
10.6092/unibo/amsdottorato/3531
Data di discussione
3 Maggio 2011
URI
Altri metadati
Tipologia del documento
Tesi di dottorato
Autore
Albano, Paolo Giulio
Supervisore
Co-supervisore
Dottorato di ricerca
Scuola di dottorato
Scienze biologiche, biomediche e biotecnologiche
Ciclo
23
Coordinatore
Settore disciplinare
Settore concorsuale
Parole chiave
Mollusca, ecology, biodiversity, conservation, Posidonia oceanica, coralligenous, detritic pools, Secche di Tor Paterno
URN:NBN
DOI
10.6092/unibo/amsdottorato/3531
Data di discussione
3 Maggio 2011
URI
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