Classificazione ecologica territoriale e serie di vegetazione: i querceti termofili del settore Tirrenico dell’Appennino centrale.

Obiettivo di questo lavoro è proporre e testare una metodologia per la delimitazione, il campionamento e la definizione delle serie di vegetazione. La metodologia viene applicata nel settore appenninico dell’Italia centrale per definire le serie di vegetazione dei querceti a Quercus virgiliana e Q. pubescens. La delimitazione degli ambiti territoriali di pertinenza di queste serie (unità ambientali) è stata effettuata tramite la classificazione ecologica territoriale, il cui obiettivo è l’individuazione di aree ecologicamente omogenee. Le unità ambientali, individuate tramite l’integrazione in ambiente GIS delle informazioni climatiche, litologiche e morfologiche, sono state utilizzate come base per la stratificazione del campionamento fitosociologico della vegetazione. Per testare la validità del campionamento, l’insieme dei rilievi effettuati è stato sottoposto a “Permutation multivariate Analysis of Variance”, effettuata sui dati delle specie di tutti i rilievi, raggruppati in base all’unità ambientale di appartenenza. Per definire le serie in termini sinecologici, sindinamici e sintassonomici i rilievi delle comunità forestali, arbustive ed erbacee, sono stati sottoposti a tecniche di analisi multivariata. Nonostante la tappa matura delle serie analizzate sia rappresentata da foreste fisionomicamente simili e con distribuzione ridotta, l’integrazione dell’approccio fitosociologico e della classificazione ecologica ha permesso di individuare 5 serie di vegetazione, ciascuna con una combinazione unica di stadi dinamici, la cui composizione specifica riflette la diversità ecologica delle unità ambientali individuate. Si sottolinea, dunque, l’importanza della stratificazione del campionamento fitosociologico tramite le unità ambientali, in quanto strumento efficace sia per la classificazione e caratterizzazione ecologica delle comunità vegetali, che per la ricostruzione delle serie di vegetazione

¿Y si descentralizamos la interacción? : Inclusión de recursos para la participación en un curso virtual

En el presente trabajo nos proponemos describir y analizar los modelos de interacción en una de las instancias de formación específica ofrecidas en el Campus Virtual del Hospital Italiano de Buenos Aires. Para ello describimos tres recursos utilizados: el foro, la base de datos y el Google Drive y analizamos la interacción en cada uno. Observamos que descentralizar la interacción promueve la construcción colaborativa de conocimiento a la vez que favorece el desarrollo de competencias complementarias, tales como la posibilidad de brindar y recibir feedback, tomar decisiones, producir colaborativamente, centrales en la educación permanente de adultos. Asimismo, esta descentralización genera desafíos y oportunidades de desarrollo profesional docente respecto de los conocimientos requeridos, de la disponibilidad para estar presente en el espacio educativo y la facilitación del aprendizaje.Dirección de Educación a Distancia, Innovación en el aula y TIC (EAD

¿Y si descentralizamos la interacción? : Inclusión de recursos para la participación en un curso virtual

En el presente trabajo nos proponemos describir y analizar los modelos de interacción en una de las instancias de formación específica ofrecidas en el Campus Virtual del Hospital Italiano de Buenos Aires. Para ello describimos tres recursos utilizados: el foro, la base de datos y el Google Drive y analizamos la interacción en cada uno. Observamos que descentralizar la interacción promueve la construcción colaborativa de conocimiento a la vez que favorece el desarrollo de competencias complementarias, tales como la posibilidad de brindar y recibir feedback, tomar decisiones, producir colaborativamente, centrales en la educación permanente de adultos. Asimismo, esta descentralización genera desafíos y oportunidades de desarrollo profesional docente respecto de los conocimientos requeridos, de la disponibilidad para estar presente en el espacio educativo y la facilitación del aprendizaje.Dirección de Educación a Distancia, Innovación en el aula y TIC (EAD

¿Y si descentralizamos la interacción? : Inclusión de recursos para la participación en un curso virtual

En el presente trabajo nos proponemos describir y analizar los modelos de interacción en una de las instancias de formación específica ofrecidas en el Campus Virtual del Hospital Italiano de Buenos Aires. Para ello describimos tres recursos utilizados: el foro, la base de datos y el Google Drive y analizamos la interacción en cada uno. Observamos que descentralizar la interacción promueve la construcción colaborativa de conocimiento a la vez que favorece el desarrollo de competencias complementarias, tales como la posibilidad de brindar y recibir feedback, tomar decisiones, producir colaborativamente, centrales en la educación permanente de adultos. Asimismo, esta descentralización genera desafíos y oportunidades de desarrollo profesional docente respecto de los conocimientos requeridos, de la disponibilidad para estar presente en el espacio educativo y la facilitación del aprendizaje.Dirección de Educación a Distancia, Innovación en el aula y TIC (EAD

Monitoring and assessing old-growth forest stands by plot sampling

Forest inventories are evolving towards multipurpose resource surveys, broadening their scope by including additional topics such as biodiversity issues. Surprisingly, few quantitative surveys have been devoted to old-growth forests, even if they constitute the most acknowledged forest biodiversity icons. In this framework, the use of probabilistic sampling may provide an effective as well as rigorous support for monitoring and assessing old-growth forests. To this purpose, the present paper proposes a two-phase sampling scheme. In the first phase, a coarse survey of few floristic and stand structural attributes is carried out by means of small plots systematically placed on the study area. Subsequently, in the second phase, a fine assessment of a large number of ecological attributes is performed on a subset of enlarged plots selected among the first-phase ones by means of simple random sampling without replacement. The proposed sampling scheme is implemented for monitoring and assessing the old forests of Cilento National Park (southern Italy). Results and comments are provided as an exemplicative case study.L'articolo è disponibile sul sito dell'editore www.tandf.co.uk/journals

Notulae to the Italian native vascular flora: 5.

In this contribution, new data concerning the distribution of native vascular flora in Italy are presented. It includes new records and confirmations to the Italian administrative regions for taxa in the genera Allium, Arabis, Campanula, Centaurea, Chaerophyllum, Crocus, Dactylis, Dianthus, Festuca, Galanthus, Helianthemum, Lysimachia, Milium, Pteris, and Quercus. Nomenclature and distribution updates, published elsewhere, and corrections are provided as supplementary material

the forest vegetation of the tolfa ceriti mountains northern latium central italy

The Forest Vegetation of the Tolfa-Ceriti Mountains (Northern Latium - Central Italy)The forests of the Tolfa-Ceriti mountains (Latium, central Italy) were investigated through a phytosociological approach. 249 relevés were performed and treated with multivariate analysis. 13 woodland communities were identified, of which 7 belong toQuercetalia pubescenti-petraeae, 1 toFagetalia sylvaticae, 1 toPopuletaliaand 4 toQuercetalia ilicis. The thermophilous Turkey oak-forests occurring on the trachytic hills of the Ceriti Mountains and on the flysch substrates of the Tolfa Mountains were included inRubio peregrinae-Quercetum cerridisass. nova.Quercus cerrisandFraxinus angustifoliasubsp.oxycarpawoodland communities of the footslopes have been ascribed toFraxino oxycarpae-Quercetum cerridis, while the widespread mesophilus Turkey oak forests have been ascribed toMelico-Quercetum cerridis. Cephalantero longifoliae-Quercetum cerridishas been restricted to acid and oligotrophic soils.Quercus petraeawoodlands, occurring on trachytic substrates have been described as a new association namedCarici olbiensis-Quercetum petraeaeass. nova. All these mixed oak woods have been included in the allianceCrataego laevigatae-Quercion cerridisArrigoni 1997. The nomenclatural problems concerning the prior nameTeucrio siculi-Quercion cerridisUbaldi 1988 are also discussed. The beech forests of the higher altitudes have been included inFraxino orni-Fagetum sylvaticae, while theAlnus glutinosaravine woodlands have been described as belonging to the new associationPolysticho setiferi-Alnetum glutinosae. Secondary communities ofAcer monspessulanumandAcer campestredeveloped on flysch substrates, and ofErica arboreaandArbutus unedo(Erico-Arbutetum unedonis) developed on trachytic substrates, have also been identified. Finally two types ofQuercus ilexwood have been identified:Cyclamino repandi-Quercetum ilicis, on sandstones, and the new associationArbuto unedonis-Quercetum ilicisass. nova on volcanic soils. This latter community can be considered as a coenological and geographical vicariant in central Italy of the sicilianErico-Quercetum ilicis

Gozdna vegetacija gorovja Tolfa-Ceriti (severni Lacij – srednja Italija)

The forests of the Tolfa-Ceriti mountains (Latium, central Italy) were investigated through a phytosociological approach. 249 relevés were performed and treated with multivariate analysis. 13 woodland communities were identified, of which 7 belong to Quercetalia pubescenti-petraeae, 1 to Fagetalia sylvaticae, 1 to Populetalia and 4 to Quercetalia ilicis. The thermophilous Turkey oak-forests occurring on the trachytic hills of the Ceriti Mountains and on the flysch substrates of the Tolfa Mountains were included in Rubio peregrinae-Quercetum cerridis ass. nova. Quercus cerris and Fraxinus angustifolia subsp. oxycarpa woodland communities of the footslopes have been ascribed to Fraxino oxycarpae-Quercetum cerridis, while the widespread mesophilus Turkey oak forests have been ascribed to Melico-Quercetum cerridis. Cephalantero longifoliae-Quercetum cerridis has been restricted to acid and oligotrophic soils. Quercus petraea woodlands, occurring on trachytic substrates have been described as a new association named Carici olbiensis-Quercetum petraeae ass. nova. All these mixed oak woods have been included in the alliance Crataego laevigatae-Quercion cerridis Arrigoni 1997. The nomenclatural problems concerning the prior name Teucrio siculi-Quercion cerridis Ubaldi 1988 are also discussed. The beech forests of the higher altitudes have been included in Fraxino orni-Fagetum sylvaticae, while the Alnus glutinosa ravine woodlands have been described as belonging to the new association Polysticho setiferi-Alnetum glutinosae. Secondary communities of Acer monspessulanum and Acer campestre developed on flysch substrates, and of Erica arborea and Arbutus unedo (Erico-Arbutetum unedonis) developed on trachytic substrates, have also been identified. Finally two types of Quercus ilex wood have been identified: Cyclamino repandi-Quercetum ilicis, on sandstones, and the new association Arbuto unedonis-Quercetum ilicis ass. nova on volcanic soils. This latter community can be considered as a coenological and geographical vicariant in central Italy of the sicilian Erico-Quercetum ilicis.Fitocenološko so bili raziskani gozdovih na pogorju Tolfa-Ceriti (Lacij, osrednja Italija). Izdelano je bilo 249 fitocenoloških popisov, ki so bili obdelani z multivariantimi metodami. Ugotovljenih je bilo 13 gozdnih združb, od katerih jih 7 uvrščamo v red Quercetalia pubescenti-petraeae, 1 v red Fagetalia sylvaticae, 1 v red Populetalia in 4 v red Quercetalia ilicis. Termofilni cerovi gozdovi, ki jih najdemo v gričevnatem svetu pogorja Ceriti in se razvijejo na flišu v pogorju Tolfa, so vključeni v asociacijo Rubio pereginae-Quercetum cerridis ass. nova. Gozdovi cera (Quercus cerris) in ozkolistnega jesena (Fraxinus angustifolia subsp. oxycarpa) na vznožjih so uvrščeni v združbo Fraxino oxycarpae-Quercetum cerridis, medtem ko so široko razširjeni mezofilni cerovi gozdovi uvrščeni v združbo Melico-Quercetum cerridis. Združba Cephalanthero longifoliae-Quercetum cerridis je razširjena le na grušču na kislih in oligotrofnih tleh. Gradnovi gozdovi, ki se pojavljajo na trahičnem substratu, so uvrščeni v novo asociacijo Carici olbiensis-Quercetum petraeae. Vsi obravnavani mešani hrastovi gozdovi so vključeni v zvezo Crataego laevigatae-Quercion cerridis Arrigoni 1997; poleg tega pa obravnavamo tudi starejše ime Teucrio siculi-Quercion cerridis Ubaldi 1988. Bukove gozdove, ki se pojavljajo na večjih nadmorskih višinah, uvrščamo v združbo Fraxino orni-Fagetum sylvaticae, medtem ko jelševe gozdove, ki jih najdemo po grapah, uvrščamo v novo asociacijo Polysticho setiferi-Alnetum glutinosae. Ugotovili smo tudi sekundarni združbi, in sicer na flišu združbo trokrpega javorja (Acer monspessulanum) in maklena (Acer campestre) ter na trahičnem substratu združbo drevesaste rese (Erica arborea) in jagodičnice (Arbutus unedo) – Erico-Arbutetum unedonis. Ugotovili smo tudi dva tipa gozdov črničevja (Quercus ilex): Cyclamino repandi- Quercetum ilicis na peščenjakih in novo asociacijo Arbuto unedeonis-Quercetum ilicis ass. nova na vulkanskih tleh, ki jo lahko obravnavamo kot cenološko in geografsko vikariantno združbo združbe Erico-Quercetum ilicis, ki jo najdemo na Siciliji