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| Titel |
Understanding relationships between morphology and ecosystem structure in a shallow tidal basins of Venice lagoon |
| VerfasserIn |
Maria Giuseppina Persichillo, Andrea Taramelli, Emiliana Valentini, Federico Filipponi, Claudia Meisina, Francesco Zucca |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250086850
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| Publikation (Nr.) |
 EGU/EGU2014-785.pdf |
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| Zusammenfassung |
| Coastal wetlands represent complex ecosystems prone to continue fluctuation of their internal
equilibrium. They are valuable natural resources characterized by the continue interactions
between geomorphological and biological components. Their adaptation to changing
conditions is highly dependent on the rate and extent of spatial and temporal processes
and their responses are still poorly understood. According to this, the vulnerability
assessment to natural and human made hazard have became fundamental to analyse
the resilience of these areas, their ability to cope with the impacts from externally
driven forces or the efforts needed to minimize the impacts (Gitay et al., 2011). The
objective of this research is to develop a comprehensive and replicable method through
the application of Multi-Source data analysis, based on the integration of Earth
Observation data and field survey, to analyse a shallow tidal basin of salt marshes,
located in the northern part of the Venice lagoon. The study site is characterised by
relatively elevated areas colonized by halophytic vegetation, and tidal flats, with not
vegetated areas, characterized by lower elevations. Sub-pixel processing techniques
(Spectral Mixing Analysis – SMA) were used to analyse the spatial distribution of both
vegetation and sediments typology. Furthermore the classifications were assayed
in terms of spatial (Power law) and temporal (Empirical Orthogonal Functions)
patterns, in order to find the main characteristics of the aforementioned spatial trends
and their variation over time. The principal aim is to study the spatio-temporal
evolution of this coastal wetland area, in order to indentify tipping points, namely
thresholds, beyond which the system reaches critical state and the main climatic,
hydrodynamic and morphological variables that may influence and increase this
behaviour. This research represents a new approach to study the geomorphological
processes and to improve the management and conservation planning for coastal
areas.
Reference:
Gitay H., Finlayson C.M. and Davidson N.(2011) - A Framework for assessing the
vulnerability of wetlands to climate change, Ramsar Technical Report No. 5, 1-18. |
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