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Pubblicazioni Scientifiche
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Pubblicazioni per anno
Estimating tree diversity in forest ecosystems by two-phase inventories
Corona
,
P.
,
Fattorini
,
Lorenzo
,
Franceschi
,
Sara
,
Marcheselli
,
Marzia
,
Pisani
,
Caterina
,
Chiavetta
,
U.
,
Puletti
,
Nicola
Mostra abstract
Several studies reveal that there is a strong interconnection between climate change and biodiversity. Indeed, estimating plant biodiversity is an important issue under forest ecosystem monitoring, which allows the evaluation of carbon storage and sequestration capacity. To this end, a two-phase strategy, suitably compatible with the most adopted sampling designs in large-scale forest inventories, is proposed. In the first phase, tessellation stratified sampling is performed by partitioning the study area into a grid of quadrats and by randomly selecting a point in each quadrat. The first-phase points are classified as forest or nonforest using remotely sensed imagery. In the second phase, a sample of points is selected from those classified as forest by means of simple random sampling without replacement. The second-phase points constitute the centers of circular plots that are visited in the field to record plant species (usually trees) and their abundance. Estimators of abundance and diversity and estimators of their variances are presented. The proposed strategy is applied in a forest area from Central Italy, as a case study. With respect to the sampling effort, the resulting estimates of relative standard errors are satisfactory, especially those regarding the overall total and diversity index estimators. The proposed statistical approach represents a suitable reference for integrated forest inventory frameworks effectively supporting biodiversity monitoring and assessment. © 2018 John Wiley & Sons, Ltd.
ManFor C.Bd sites and the drivers of forest functions
Di Salvatore
,
Umberto
,
Tonti
,
Daniela
,
Bascietto
,
Marco
,
Chiavetta
,
U.
,
Cantiani
,
Paolo
,
Fabbio
,
Gianfranco
,
Becagli
,
Claudia
,
Bertini
,
Giada
,
Sansone
,
Dalila
,
Skudnik
,
Mitja
,
Kobal
,
Milan
,
Kutnar
,
Lado
,
Ferreira
,
Andreja
,
Kobler
,
Andrej
,
Kovač
,
Marko
,
Ferretti
,
Fabrizio
Ecological portrayal of old-growth forests and persistent woodlands in the cilento and vallo di Diano National Park (southern Italy)
Marchetti
,
Marco
,
Tognetti
,
Roberto
,
Lombardi
,
Fabio
,
Chiavetta
,
U.
,
Palumbo
,
Giuseppe
,
Sellitto
,
Vincenzo Michele
,
Colombo
,
C. Massimo
,
Iovieno
,
Paola
,
Alfani
,
Anna
,
Baldantoni
,
Daniela
,
Barbati
,
Anna
,
Ferrari
,
Barbara
,
Bonacquisti
,
Sandro
,
Capotorti
,
Giulia
,
Copiz
,
Riccardo
,
Blasi
,
Carlo
biodiversity
mediterranean region
ecological characterization
managed stands
old-growth forests
persistent woodlands
soil
Mostra abstract
The maintenance of certain levels of old forest represents a cornerstone of the EU's biodiversity management strategy. A consensus on a single general ecological definition of old-growth is particularly difficult in Mediterranean Europe. The present paper deals with old-growth forests and persistent woodlands in the Cilento and Vallo di Diano National Park (PNCVD) to give an ecological understanding of forest complexity and dynamics under a multiscale and multidisciplinary perspective. The multiscale approach ranged from the identification and mapping of potential old-growth stands at landscape scale to a two-level field review of forest stand features. Field sampling involved a multidisciplinary team of researchers in forest structure, pedologic environment, soil microbial activity, flora and vegetation and deadwood components. The research provided sound knowledge about old-growthness features in the PNCVD that constitutes a unique case study in the whole Mediterranean basin. The integration of results allowed to: identify main ecosystem functions and the related services of the old-growth forests in the study area; distinguish persistent woodlands, multi-aged stands with old trees deriving from nineteenth-century management practices, from old-growth forests sensu strictu; recognize indicators of direct and indirect impacts of human activities; suggest effective practices for sustainable management in the Mediterranean context. © 2010 Società Botanica Italiana.