http://www.cnr.it/ontology/cnr/individuo/prodotto/ID6676
Intrabasinal conditions promoting the development of a biogenic carbonate sedimentary facies associated with the seagrass Posidonia oceanica. (Articolo in rivista)
- Type
- Label
- Intrabasinal conditions promoting the development of a biogenic carbonate sedimentary facies associated with the seagrass Posidonia oceanica. (Articolo in rivista) (literal)
- Anno
- 2008-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.csr.2007.12.014 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- De Falco G.; Baroli M.; Cucco A.; Simeone S. (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
- http://www.sciencedirect.com/science/article/pii/S0278434308000034 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
- Note
- Scopu (literal)
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- De Falco Giovanni - Istituto per l'Ambiente Marino Costiero UOS Oristano- Consiglio Nazionale delle Ricerche
Baroli Maura Adriana - Fondazione IMC - Centro Marino Internazionale - ONLUS - Oristano
Cucco Andrea - Istituto per l'Ambiente Marino Costiero UOS Oristano- Consiglio Nazionale delle Ricerche
Simeone Simone - Fondazione IMC - Centro Marino Internazionale - ONLUS - Oristano (literal)
- Titolo
- Intrabasinal conditions promoting the development of a biogenic carbonate sedimentary facies associated with the seagrass Posidonia oceanica. (literal)
- Abstract
- This paper aims to elucidate the spatial relationships between the distribution and growth dynamics of Posidonia oceanica, the
sedimentary depositional facies (carbonate vs. siliciclastic), and the hydrodynamic features of the Gulf of Oristano (Western Sardinia,
Mediterranean sea), a complex depositional system characterized by multiple sources of sediments and a marked hydrodynamic
gradient.
Three depositional environments were identified: (i) a poorly vegetated sector characterized by muddy sediments derived from the river
input; (ii) a sector colonized by P. oceanica meadows characterized by biogenic carbonate sediments derived from the sediment
production associated with the seagrass ecosystem and (iii) a sector colonized by P. oceanica meadows characterized by coarse siliciclastic
sediments, possibly relict sediments.
The sedimentary depositional environments are heavily influenced by the spatial distribution of the wind wave energy. Biogenic
carbonate reefs associated with P. oceanica meadows develop in sheltered areas characterized by low amplitude of waves generated by the
main wind regime. In the exposed sectors, characterized by a higher wave height, the meadows colonize relict siliciclastic sediments,
without promoting carbonate particle deposition.
Posidonia oceanica meadows in sheltered areas, associated with biogenic sedimentary facies, exhibit higher rhizome growth rate values
(1.1 and 1.2 cm year?1 vs. 0.7 cm year?1) and a lower percentage of horizontal shoots (1.1% and 4.1% vs. 18%) in comparison to
P. oceanica meadows in exposed areas, associated with siliciclastic sedimentary facies. The former tend to develop in a vertical direction,
thus contrasting the sediment deposition rate, the latter tend to expand laterally due to the absence of sediment deposition.
These results highlight that wave amplitude is the intrabasinal factor which influences the deposition of biogenic sediments and the
growth dynamics of P. oceanica meadows. (literal)
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