Mixed forests are particularly interesting for diversity analyses, as high diversity can be expected in this forest type. The repeated spatio-temporal analysis in these forests may provide insight on natural stand development processes over time. However, because of cost and time constraints, very few studies have performed spatio-temporal analysis of forest stands dynamics. In addition, most studies employed chronosequences rather than true time series (repeated measures on permanent plots), which may introduce some uncertainties in interpreting trends over time. Further, the majority of previous studies on spatial diversity has analysed tropical and sub-tropical forests, while studies on temperate forests have been scarce. This study aim was to investigate the spatio-temporal changes in structure and diversity in seminatural mixed floodplain forests at Bosco Fontana, Italy. Replicated, repeated measurements at single tree level were conducted in three ~1-ha permanent plots (Core Areas – CAs), where all standing trees were mapped and inventoried in 1995, 2005 and 2016. These data were used to perform temporal analysis of tree structure and diversity in this forest type enabling structural diversity (Simpson, Pielou’s, Shannon), spatially-explicit diversity (species mingling, diameter differentiation, Clark and Evans) and functional diversity measures to be calculated. Results indicated that tree density is decreasing through time in both CA2 and CA3 while CA1 showed increasing pattern over time due to the abundance of new small trees (dbh<10 cm). The total basal area increased considerably in CA1 mainly due to the increase of two species (Carpinus betulus and Quercus robur) and in CA3 due to three species (Carpinus betulus, Quercus robur, and Fraxinus angustifolia). Analysis of diversity indicated that structural diversity indices did not show strong differences between CAs; a strong positive correlation was found between these indices and Waterlogging tolerance. By contrast, functional diversity indices showed the largest differentiation between CAs. A strong negative correlation is obtained between functional diversity and the other diversity indices. We concluded that the combination of these indices is meaningful to characterize the dynamic patterns of semi-natural floodplain forest.
Dinamiche spazio-temporali in foreste planiziarie seminaturali: Riserva Statale Bosco Fontana, Italia. Spatio-temporal dynamic patterns in seminatural floodplain forests: Bosco Fontana State Reserve, Italy / Jannatul Fardusi, Most; Castaldi, Cristiano; Grotti, Mirko; Chianucci, Francesco; Puletti, Nicola; Corona, Piermaria. - (2018), pp. 100-100. (Intervento presentato al convegno XII Convegno Nazionale Biodiversità, Ambienti, Salute tenutosi a Teramo; Italy).
Dinamiche spazio-temporali in foreste planiziarie seminaturali: Riserva Statale Bosco Fontana, Italia. Spatio-temporal dynamic patterns in seminatural floodplain forests: Bosco Fontana State Reserve, Italy
Mirko Grotti;
2018
Abstract
Mixed forests are particularly interesting for diversity analyses, as high diversity can be expected in this forest type. The repeated spatio-temporal analysis in these forests may provide insight on natural stand development processes over time. However, because of cost and time constraints, very few studies have performed spatio-temporal analysis of forest stands dynamics. In addition, most studies employed chronosequences rather than true time series (repeated measures on permanent plots), which may introduce some uncertainties in interpreting trends over time. Further, the majority of previous studies on spatial diversity has analysed tropical and sub-tropical forests, while studies on temperate forests have been scarce. This study aim was to investigate the spatio-temporal changes in structure and diversity in seminatural mixed floodplain forests at Bosco Fontana, Italy. Replicated, repeated measurements at single tree level were conducted in three ~1-ha permanent plots (Core Areas – CAs), where all standing trees were mapped and inventoried in 1995, 2005 and 2016. These data were used to perform temporal analysis of tree structure and diversity in this forest type enabling structural diversity (Simpson, Pielou’s, Shannon), spatially-explicit diversity (species mingling, diameter differentiation, Clark and Evans) and functional diversity measures to be calculated. Results indicated that tree density is decreasing through time in both CA2 and CA3 while CA1 showed increasing pattern over time due to the abundance of new small trees (dbh<10 cm). The total basal area increased considerably in CA1 mainly due to the increase of two species (Carpinus betulus and Quercus robur) and in CA3 due to three species (Carpinus betulus, Quercus robur, and Fraxinus angustifolia). Analysis of diversity indicated that structural diversity indices did not show strong differences between CAs; a strong positive correlation was found between these indices and Waterlogging tolerance. By contrast, functional diversity indices showed the largest differentiation between CAs. A strong negative correlation is obtained between functional diversity and the other diversity indices. We concluded that the combination of these indices is meaningful to characterize the dynamic patterns of semi-natural floodplain forest.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
