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| Titel |
Adaptive traits to fluvial systems of native tree European black Poplar (Populus nigra L.) population in Southern Italy |
| VerfasserIn |
Luigi Saulino, Vittorio Pasquino, Luigi Todaro, Angelo Rita, Paolo Villani, Giovanni Battista Chirico, Antonio Saracino |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250105516
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| Publikation (Nr.) |
 EGU/EGU2015-5047.pdf |
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| Zusammenfassung |
| This work focuses on the morphological and biomechanical traits developed by the
European black poplar (Populus nigra) to cope with the hydraulic force and prolonged
submersion periods during floods. Two riverine environments of the Cilento sub-region
(Southern Italy) have been selected for this experimental study. The two sites have the
same climatic and hydrological regimes. The first site is located along the Ripiti
stream, characterized by a braided channel with longitudinal and transverse bars and
eroding banks. The second site is located along the Badolato stream, an entrenched
meandering riffle/pool channel, with low gradients and high width/depth. P. nigra
mixed with Salix alba and along the Badolato stream also Platanus orientalis, is the
dominant wooden riparian vegetation in both sites. Cuttings from adult P. nigra trees
originated by seeds were collected and planted in the “Azienda Sperimentale Regionale
Improsta” (Eboli-Salerno, Campania region). The experimental plantation was managed
according to a multi-stem short rotation coppice with low external energy input
and high disturbance regime generated by a 3 years rotation coppicing. The two
sample stool sets exhibit statistically similar morphological traits, but different
values of Young elasticity module of the shoots. A functional evaluation of the
biomechanical differences was performed by measuring the bending of the individual stems
under the hypothesis of complete submergence within a flow of different mean
velocities, using a numerical model that predicts the bending of woody vegetation beams
allowing for large deflections. The results suggest that plants with the same gene
pool but coming from morphologically different riverine environments, may reflect
different dominant biomechanical properties, which might be relevant for designing
local sustainable management and restoration plans of rivers and riparian systems. |
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