Preprint volume - SIBM
Preprint volume - SIBM
Preprint volume - SIBM
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Pre-print Volume – Oral presentations<br />
Topic 3: INTEGRATED COASTAL ZONE MANAGEMENT<br />
i) High discordances among cartographies realized in three different periods. As large<br />
differences in meadow extension and typology in a single year are unlikely, these are to<br />
be considered as due to errors in the positioning and/or interpretation of sonograms.<br />
Such large errors prevent any possibility to evaluate evolution of the meadows over<br />
short term time scales (i.e., between 1990-91 and 2006). A well definite protocol for<br />
the use of acoustic techniques when mapping seagrass is recommended, including the<br />
adoption of systematic ground truthing criteria and designs.<br />
ii) Superimposed to short term (i.e. decadal) time scale, P. oceanica meadows show a<br />
long-term (i.e. millennial) time scale evolution. The results obtained from core V1 call<br />
for integration with more spatially dispersed data, but suggest that long-term evolution<br />
of the meadow comprises periods of natural expansion and regression. Additional data<br />
are also needed to clarify the link between climatic events during Holocene and P.<br />
oceanica evolution.<br />
iii) discordances in meadows extension evaluation lead to variations of the economic<br />
value of Vado-Bergeggi meadow: 102460 €·y -1 (1990), 0 €·y -1 (1991), 20818 €·y -1<br />
(2006). It is compulsory to specify that these values probably represent an<br />
underestimation of P. oceanica value since they not include other services as, e.g.,<br />
biodiversity source and coastal protection from erosion.<br />
References<br />
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Ligure. Centro Ricerche Ambiente Marino ENEA, La Spezia: 146 pp.<br />
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MSS-ENEA (1991) - Indagine a mare per la mappatura ed il controllo dello stato di salute della<br />
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ODUM H.T. (1996) - Environmental Accounting. John Wiley and Sons, New York.<br />
TIGNY V., OZER A., DE FALCO G., BAROLI M., DJENIDI S. (2007) - Relationship between the<br />
evolution of the shoreline and the Posidonia oceanica meadow limit in a Sardinian coastal zone.<br />
Journal of Coastal Research, 23 (3): 787-793.<br />
VACCHI M., MONTEFALCONE M., BIANCHI CN., MORRI C., FERRARI M. (2010) - The<br />
influence of coastal dynamics on the upper limit of the Posidonia oceanica meadow. Marine<br />
Ecology, (in press).<br />
Work partially done under the aegis of the project ‘The impacts of biological invasions and<br />
climate change on the biodiversity of the Mediterranean Sea’ (Italy–Israel co-operation, Italian<br />
Ministry of Environment).<br />
41 st S.I.B.M. CONGRESS Rapallo (GE), 7-11 June 2010<br />
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