Natura bresciana: annuario del Museo Civico di Storia Naturale di Brescia, 2019
EnglishOccurrence of a species in the group Azolla caroliniana/A. cristata (Salviniaceae, Pterido... more EnglishOccurrence of a species in the group Azolla caroliniana/A. cristata (Salviniaceae, Pteridophyta) recently discovered to be spontaneous in Italy. At least two species of the genus Azolla are currently found in natural environments of Italy: A. filiculoides, whose presence was already known, and a species of the group A. caroliniana/A. cristata, whose occurrence was repeatedly questioned or it was believed as extinct, but it is now definitely included in the Italian alien flora for the populations found in Lake Varese. However, it was not possible to establish the species between A. caroliniana/A. cristata, because sporocarps were not collected. Considerations about the way of introduction and the status of naturalized/invasive neophyte are also reported italianoIn Italia sono attualmente accertate almeno due specie del genere Azolla in ambienti naturali: A. filiculoides, di cui si conosceva gia la presenza; e una specie del gruppo A. caroliniana/A. cristata, la cui presenza e stata piu volte messa in dubbio oppure e stata considerata come estinta, ma ora viene definitivamente annoverata nella flora esotica italiana tramite le popolazioni accertate sul Lago di Varese. Non e stato pero possibile determinare la specie tra A. caroliniana/A. cristata, in quanto non sono stati osservati sporocarpi. Sono inoltre riportate considerazioni sulle modalita di introduzione e sullo stato di neofita naturalizzata/invasiva
Natura bresciana: annuario del Museo Civico di Storia Naturale di Brescia, 2017
italianoNella collezione di Valerio Giacomini (1914-1981), donata nel 1984 al Museo di Scienze Na... more italianoNella collezione di Valerio Giacomini (1914-1981), donata nel 1984 al Museo di Scienze Naturali di Brescia, e stata ritrovata un’inedita raccolta del botanico lucano Orazio Gavioli (1871-1944). Si tratta di cento exsiccata di piante vascolari, collezionate dall’Autore tra il 1923 e il 1926 in provincia di Potenza. Il ritrovamento della raccolta dell’Autore lucano e stato del tutto casuale, poiche era riposta in una scatola di cartone delle dimensioni di cm 26×36×49, riportante esternamente una etichetta con la scritta in matita: “Hb - Zodda - Ugolini, Flora Pirenei”, che conteneva anche altre tre cartellette di exsiccata della collezione Giacomini. La raccolta di Gavioli era gia appartenuta al naturalista bresciano Ugolino Ugolini (1856-1942), con il quale Gavioli aveva una collaborazione scientifica. Il suo ritrovamento e singolare, poiche l’intera collezione di exsiccata di Ugolini e stata interamente acquisita dall’Universita degli Studi di Padova e ora e conservata presso l’Herbarium Patavinum (PAD). La raccolta di Gavioli e oggi conservata presso l’erbario Sezione Botanica del Museo di Scienze Naturali di Brescia italianoAn unpublished collection of Orazio Gavioli found in the fund “Valerio Giacomini” at the Civic Museum of Natural Sciences of Brescia. An unpublished collection of the Lucanian botanist Orazio Gavioli (1871-1944) was found in the “Valerio Giacomini” collection, donated to the Civic Museum of Natural Science of Brescia in 1984. It consists of one hundred exsiccata of vascular plants, collected by the Author in the Province of Potenza between 1923 and 1926. The discovery of the collection was completely accidental, since it was placed in a cardboard box measuring 26×36×49 cm which externally showed a label with the writing in pencil: “Hb - Zodda - Ugolini, Flora Pyrenees “and that also contained three other folders of exsiccata from the Giacomini Collection. The Gavioli collection previously belonged to Ugolino Ugolini (1856-1942), a naturalist from Brescia, with whom Gavioli had a scientific collaboration. Its discovery is remarkable, since the entire Ugolini collection of exsiccata was acquired by the University of Padua and is now kept at the Herbarium Patavinum (PAD).The Gavioli Collection is now conserved in the Botanical Section of the Civic Museum of Natural Science of Brescia.
Lorenzo Rota può essere considerato a buon titolo il padre della botanica orobica. Nacque a Caren... more Lorenzo Rota può essere considerato a buon titolo il padre della botanica orobica. Nacque a Carenno il 7 agosto 1818. Dopo gli studi liceali si iscrisse alla facoltà di Medicina e Chirurgia dell'Università di Pavia, dove si laureò a pieni voti nel 1843 con una tesi d'argomento botanico. Sarà questa il primo nucleo di osservazioni che porteranno, dieci anni dopo, all'edizione di quella che può essere considerata una delle Flore più innovative della Lombardia: il "prospetto" della Flora della Provincia di Bergamo. In essa Rota enumera quasi 2200 specie corredandole di osservazioni ecologiche e quote di rinvenimento. Il suo erbario è un esempio per la ricchezza e la precisione delle informazioni. Lasciato l'Ateneo pavese divenne medico condotto ad Adrara San Martino. Rota viene ricordato non solo come valente botanico, ma come medico sensibile. Nominato nel 1855 membro della Commissione Sanitaria per combattere l'epidemia di colera, contrasse il morbo e, dopo aver curato i suoi pazienti per la stessa patologia, morì il 6 agosto del medesimo anno.
italianoSi documenta il rinvenimento della Linnaea borealis L. sulle Alpi Orobie orientali, a quo... more italianoSi documenta il rinvenimento della Linnaea borealis L. sulle Alpi Orobie orientali, a quota modesta. EnglishThe discovery of Linnaea borealis L. on Eastern Orobian Alps territory, at modest altitude, is reported
The Convention on Biological Diversity (CBD) aims at the conservation of all three levels of biod... more The Convention on Biological Diversity (CBD) aims at the conservation of all three levels of biodiversity, i.e. ecosystems, species and genes. Genetic diversity represents evolutionary potential and is important for ecosystem functioning. Unfortunately, genetic diversity in natural populations is hardly considered in conservation strategies because it is difficult to measure and has been hypothesized to co-vary with species richness. This means that species richness is taken as a surrogate of genetic diversity in conservation planning, though their relationship has not been properly evaluated. We tested whether the genetic and species levels of biodiversity co-vary, using a large-scale and multi-species approach. We chose the high-mountain flora of the Alps and the Carpathians as study systems and demonstrate that species richness and genetic diversity are not correlated. Species richness thus cannot act as a surrogate for genetic diversity. Our results have important consequences for implementing the CBD when designing conservation strategies
EnglishOccurrence of a species in the group Azolla caroliniana/A. cristata (Salviniaceae, Pterido... more EnglishOccurrence of a species in the group Azolla caroliniana/A. cristata (Salviniaceae, Pteridophyta) recently discovered to be spontaneous in Italy. At least two species of the genus Azolla are currently found in natural environments of Italy: A. filiculoides, whose presence was already known, and a species of the group A. caroliniana/A. cristata, whose occurrence was repeatedly questioned or it was believed as extinct, but it is now definitely included in the Italian alien flora for the populations found in Lake Varese. However, it was not possible to establish the species between A. caroliniana/A. cristata, because sporocarps were not collected. Considerations about the way of introduction and the status of naturalized/invasive neophyte are also reported italianoIn Italia sono attualmente accertate almeno due specie del genere Azolla in ambienti naturali: A. filiculoides, di cui si conosceva gia la presenza; e una specie del gruppo A. caroliniana/A. cristata, la cui presenza e ...
LETTER Genetic diversity in widespread species is not congruent with species richness in alpine p... more LETTER Genetic diversity in widespread species is not congruent with species richness in alpine plant communities
italianoVengono presentati i risultati di una ricerca sul gruppo di Carex flava (Cyperaceae), nel... more italianoVengono presentati i risultati di una ricerca sul gruppo di Carex flava (Cyperaceae), nella Lombardia centro-orientale (province di Bergamo, Brescia e territori limitrofi ). In base a una cospicua raccolta iniziata nel 1984, rappresentata da 280 fogli d’erbario, sono stati individuati i seguenti taxa: C. flava L. s. str., C. flava L. var. alpina Kneucker, C. lepidocarpa Tausch, C. oederi Retz., C. tumidicarpa Anderss. nonche la notospecie C. × alsatica (C. tumidicarpa x C. flava). Per ciascuno dei taxa sono discussi la diffusione locale (con carta distributiva) e gli aspetti ecologici fondamentali con riferimento alla valenza altitudinale EnglishCarex flava L. complex in centre-Eastern Lombardy (Northern Italy). The paper deals with the research on the Carex flava group (Cyperaceae) in Central-Eastern Lombardy (including the provinces of Bergamo, Brescia and surrounding areas). The study, carried out on the basis of 280 herbarium specimens, has put in evidence the presence o...
EnglishAdditional information regarding the Vascular Flora of Central-Eastern Lombardy is present... more EnglishAdditional information regarding the Vascular Flora of Central-Eastern Lombardy is presented. Data includes REVHUYDWLRQV LQ WKH AHOG KHUEDULXP UHIHUHQFHV bibliographical references and 17 references derived from recent revisions of historical herbaria for a total of 1156 new items of information. Two new genera have been registered for the Flora, both exotic: Phyla and Sesamum. New or UHYLYHGWD[DDWDVSHFLAFDQGLQIUDVSHFLAFOHYHODPRXQWWR including Campanula martinii and Sempervivum soculense which are new to science, and one, Hieracium dolichaetum, revived for the area concerned. italianoVengono presentate le aggiunte e le integrazioni alla “Flora vascolare delle Lombardia centro-orientale”. Si tratta di 1156 nuovi dati, di cui 891 osservazioni in campo, GDWLG·HUEDULRVHJQDOD]LRQLELEOLRJUDAFKHUHFHQWLH derivate da revisioni di erbari storici. Sono stati registrati due generi nuovi per la Flora, ambedue esotici: Phyla e Sesamum. I...
Repertorio delle specie esotiche che vegetano sul corso superiore del fiume Oglio, con fotografie... more Repertorio delle specie esotiche che vegetano sul corso superiore del fiume Oglio, con fotografie, mappe distributive e duscussione sull'indice di inquinamento. Seguono tre allegati: Impatto sulla salute, umana, rapporti tra entomofauna ed esotiche, gestione dei boschi ripariali.
Vascular flora of the “high lands” of the Orobian Alps. This paper lists the alpine flora of the ... more Vascular flora of the “high lands” of the Orobian Alps. This paper lists the alpine flora of the Orobian Alps using field data, herbaria, and bibliographic sources. The maximum altitude at which the taxa were found is shown for the area covered by the four provinces. Floristic data are processed in order to provide the biological, chorological and ecological spectrum; the level of protection accorded to the identified flora is indicated. Finally, we hypothesize on the behaviour of the species in view of climate change, and a list of the taxa at greatest risk is provided.
ABSTRACTAim (1) To explore the impact of land use, climate and environmentalheterogeneity on fern... more ABSTRACTAim (1) To explore the impact of land use, climate and environmentalheterogeneity on fern species richness along a complete elevational gradient,and (2) to evaluate the relative importance of the three groups of variables withindifferent elevational intervals.Location A temperate mountain region (55,507 km 2 ) of Italy on the southernborder of the European Alps divided into a regular grid of 1476 cells (grain35.7 km 2 ).Methods We applied multiple regression (spatial and non-spatial) to determinethe relative influence of the three groups of variables on species richness,including variation partitioning at two scales. We considered the whole gradient(all 1476 cells) to explain the overall elevational pattern of species richness,and we grouped the cells into elevational intervals of 500 m in order toevaluate the explanatory power of the predictors within different zones along thegradient.Results Species richness showed a hump-shaped pattern with elevation, forminga plateau betw...
Aim Our aims were: (1) to separately evaluate the elevational patterns of b-diversity for nestedn... more Aim Our aims were: (1) to separately evaluate the elevational patterns of b-diversity for nestedness, species richness difference and replacement, (2) to identify the drivers of b-diversity patterns by testing the effect of geographical and environmental distance (human population, temperature and land-use), and (3) to compare the response on native versus alien species to elucidate mechanisms of community assembly along elevational gradients. Location Two mountain regions (Bergamo-Brescia and Trento) in the Italian Alps. Methods We used two floristic datasets in which species composition was sampled within two regular grids. First, we extracted species elevational range and quantified species composition nestedness along the elevational gradient. Second, we partitioned b-diversity into its species richness difference and replacement components and tested drivers using regression on distance matrix and hierarchical partitioning. All analyses were performed on natives and aliens, separately. Results For aliens, we found lack of mountain specialists (i.e. species with a distribution range restricted to high elevations), large nestedness, large species richness difference and low species replacement between low and high elevations. All findings point in the same direction: a great majority of alien species were introduced to the lowlands and only a subset of this community spread up the mountains. Both human pressures and temperature selection were important processes underpinning the observed filtering, while geographical and land-use distances were not important. Natives present contrasting patterns with large replacement along the elevation gradients indicating different mechanisms of community assembly. Main conclusions The relatively large alien species replacement in the lowlands indicated the presence of a pool of species that may potentially invade the temperate mountains in the future. Investigations of the identity of alien species occurring in the lowlands and their climatic pre-adaptation might provide tools to prevent invasions in the mountains by predicting the potential invaders and their future elevational distribution.
Discussione sul ruolo del conte Firmian sul suo periodo di reggente del Regno Lombardo veneto a M... more Discussione sul ruolo del conte Firmian sul suo periodo di reggente del Regno Lombardo veneto a Milano
Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology, 2016
The spread of the invasive and allergenic Ambrosia artemisiifolia L. in Italy was analysed and ma... more The spread of the invasive and allergenic Ambrosia artemisiifolia L. in Italy was analysed and mapped using distribution data from a wide range of sources. Ambrosia artemisiifolia occupies 1057 floristic quadrants which are mostly distributed in the Po plain. The distribution obtained represents the basis to implement urgent management strategies.
Natura bresciana: annuario del Museo Civico di Storia Naturale di Brescia, 2019
EnglishOccurrence of a species in the group Azolla caroliniana/A. cristata (Salviniaceae, Pterido... more EnglishOccurrence of a species in the group Azolla caroliniana/A. cristata (Salviniaceae, Pteridophyta) recently discovered to be spontaneous in Italy. At least two species of the genus Azolla are currently found in natural environments of Italy: A. filiculoides, whose presence was already known, and a species of the group A. caroliniana/A. cristata, whose occurrence was repeatedly questioned or it was believed as extinct, but it is now definitely included in the Italian alien flora for the populations found in Lake Varese. However, it was not possible to establish the species between A. caroliniana/A. cristata, because sporocarps were not collected. Considerations about the way of introduction and the status of naturalized/invasive neophyte are also reported italianoIn Italia sono attualmente accertate almeno due specie del genere Azolla in ambienti naturali: A. filiculoides, di cui si conosceva gia la presenza; e una specie del gruppo A. caroliniana/A. cristata, la cui presenza e stata piu volte messa in dubbio oppure e stata considerata come estinta, ma ora viene definitivamente annoverata nella flora esotica italiana tramite le popolazioni accertate sul Lago di Varese. Non e stato pero possibile determinare la specie tra A. caroliniana/A. cristata, in quanto non sono stati osservati sporocarpi. Sono inoltre riportate considerazioni sulle modalita di introduzione e sullo stato di neofita naturalizzata/invasiva
Natura bresciana: annuario del Museo Civico di Storia Naturale di Brescia, 2017
italianoNella collezione di Valerio Giacomini (1914-1981), donata nel 1984 al Museo di Scienze Na... more italianoNella collezione di Valerio Giacomini (1914-1981), donata nel 1984 al Museo di Scienze Naturali di Brescia, e stata ritrovata un’inedita raccolta del botanico lucano Orazio Gavioli (1871-1944). Si tratta di cento exsiccata di piante vascolari, collezionate dall’Autore tra il 1923 e il 1926 in provincia di Potenza. Il ritrovamento della raccolta dell’Autore lucano e stato del tutto casuale, poiche era riposta in una scatola di cartone delle dimensioni di cm 26×36×49, riportante esternamente una etichetta con la scritta in matita: “Hb - Zodda - Ugolini, Flora Pirenei”, che conteneva anche altre tre cartellette di exsiccata della collezione Giacomini. La raccolta di Gavioli era gia appartenuta al naturalista bresciano Ugolino Ugolini (1856-1942), con il quale Gavioli aveva una collaborazione scientifica. Il suo ritrovamento e singolare, poiche l’intera collezione di exsiccata di Ugolini e stata interamente acquisita dall’Universita degli Studi di Padova e ora e conservata presso l’Herbarium Patavinum (PAD). La raccolta di Gavioli e oggi conservata presso l’erbario Sezione Botanica del Museo di Scienze Naturali di Brescia italianoAn unpublished collection of Orazio Gavioli found in the fund “Valerio Giacomini” at the Civic Museum of Natural Sciences of Brescia. An unpublished collection of the Lucanian botanist Orazio Gavioli (1871-1944) was found in the “Valerio Giacomini” collection, donated to the Civic Museum of Natural Science of Brescia in 1984. It consists of one hundred exsiccata of vascular plants, collected by the Author in the Province of Potenza between 1923 and 1926. The discovery of the collection was completely accidental, since it was placed in a cardboard box measuring 26×36×49 cm which externally showed a label with the writing in pencil: “Hb - Zodda - Ugolini, Flora Pyrenees “and that also contained three other folders of exsiccata from the Giacomini Collection. The Gavioli collection previously belonged to Ugolino Ugolini (1856-1942), a naturalist from Brescia, with whom Gavioli had a scientific collaboration. Its discovery is remarkable, since the entire Ugolini collection of exsiccata was acquired by the University of Padua and is now kept at the Herbarium Patavinum (PAD).The Gavioli Collection is now conserved in the Botanical Section of the Civic Museum of Natural Science of Brescia.
Lorenzo Rota può essere considerato a buon titolo il padre della botanica orobica. Nacque a Caren... more Lorenzo Rota può essere considerato a buon titolo il padre della botanica orobica. Nacque a Carenno il 7 agosto 1818. Dopo gli studi liceali si iscrisse alla facoltà di Medicina e Chirurgia dell'Università di Pavia, dove si laureò a pieni voti nel 1843 con una tesi d'argomento botanico. Sarà questa il primo nucleo di osservazioni che porteranno, dieci anni dopo, all'edizione di quella che può essere considerata una delle Flore più innovative della Lombardia: il "prospetto" della Flora della Provincia di Bergamo. In essa Rota enumera quasi 2200 specie corredandole di osservazioni ecologiche e quote di rinvenimento. Il suo erbario è un esempio per la ricchezza e la precisione delle informazioni. Lasciato l'Ateneo pavese divenne medico condotto ad Adrara San Martino. Rota viene ricordato non solo come valente botanico, ma come medico sensibile. Nominato nel 1855 membro della Commissione Sanitaria per combattere l'epidemia di colera, contrasse il morbo e, dopo aver curato i suoi pazienti per la stessa patologia, morì il 6 agosto del medesimo anno.
italianoSi documenta il rinvenimento della Linnaea borealis L. sulle Alpi Orobie orientali, a quo... more italianoSi documenta il rinvenimento della Linnaea borealis L. sulle Alpi Orobie orientali, a quota modesta. EnglishThe discovery of Linnaea borealis L. on Eastern Orobian Alps territory, at modest altitude, is reported
The Convention on Biological Diversity (CBD) aims at the conservation of all three levels of biod... more The Convention on Biological Diversity (CBD) aims at the conservation of all three levels of biodiversity, i.e. ecosystems, species and genes. Genetic diversity represents evolutionary potential and is important for ecosystem functioning. Unfortunately, genetic diversity in natural populations is hardly considered in conservation strategies because it is difficult to measure and has been hypothesized to co-vary with species richness. This means that species richness is taken as a surrogate of genetic diversity in conservation planning, though their relationship has not been properly evaluated. We tested whether the genetic and species levels of biodiversity co-vary, using a large-scale and multi-species approach. We chose the high-mountain flora of the Alps and the Carpathians as study systems and demonstrate that species richness and genetic diversity are not correlated. Species richness thus cannot act as a surrogate for genetic diversity. Our results have important consequences for implementing the CBD when designing conservation strategies
EnglishOccurrence of a species in the group Azolla caroliniana/A. cristata (Salviniaceae, Pterido... more EnglishOccurrence of a species in the group Azolla caroliniana/A. cristata (Salviniaceae, Pteridophyta) recently discovered to be spontaneous in Italy. At least two species of the genus Azolla are currently found in natural environments of Italy: A. filiculoides, whose presence was already known, and a species of the group A. caroliniana/A. cristata, whose occurrence was repeatedly questioned or it was believed as extinct, but it is now definitely included in the Italian alien flora for the populations found in Lake Varese. However, it was not possible to establish the species between A. caroliniana/A. cristata, because sporocarps were not collected. Considerations about the way of introduction and the status of naturalized/invasive neophyte are also reported italianoIn Italia sono attualmente accertate almeno due specie del genere Azolla in ambienti naturali: A. filiculoides, di cui si conosceva gia la presenza; e una specie del gruppo A. caroliniana/A. cristata, la cui presenza e ...
LETTER Genetic diversity in widespread species is not congruent with species richness in alpine p... more LETTER Genetic diversity in widespread species is not congruent with species richness in alpine plant communities
italianoVengono presentati i risultati di una ricerca sul gruppo di Carex flava (Cyperaceae), nel... more italianoVengono presentati i risultati di una ricerca sul gruppo di Carex flava (Cyperaceae), nella Lombardia centro-orientale (province di Bergamo, Brescia e territori limitrofi ). In base a una cospicua raccolta iniziata nel 1984, rappresentata da 280 fogli d’erbario, sono stati individuati i seguenti taxa: C. flava L. s. str., C. flava L. var. alpina Kneucker, C. lepidocarpa Tausch, C. oederi Retz., C. tumidicarpa Anderss. nonche la notospecie C. × alsatica (C. tumidicarpa x C. flava). Per ciascuno dei taxa sono discussi la diffusione locale (con carta distributiva) e gli aspetti ecologici fondamentali con riferimento alla valenza altitudinale EnglishCarex flava L. complex in centre-Eastern Lombardy (Northern Italy). The paper deals with the research on the Carex flava group (Cyperaceae) in Central-Eastern Lombardy (including the provinces of Bergamo, Brescia and surrounding areas). The study, carried out on the basis of 280 herbarium specimens, has put in evidence the presence o...
EnglishAdditional information regarding the Vascular Flora of Central-Eastern Lombardy is present... more EnglishAdditional information regarding the Vascular Flora of Central-Eastern Lombardy is presented. Data includes REVHUYDWLRQV LQ WKH AHOG KHUEDULXP UHIHUHQFHV bibliographical references and 17 references derived from recent revisions of historical herbaria for a total of 1156 new items of information. Two new genera have been registered for the Flora, both exotic: Phyla and Sesamum. New or UHYLYHGWD[DDWDVSHFLAFDQGLQIUDVSHFLAFOHYHODPRXQWWR including Campanula martinii and Sempervivum soculense which are new to science, and one, Hieracium dolichaetum, revived for the area concerned. italianoVengono presentate le aggiunte e le integrazioni alla “Flora vascolare delle Lombardia centro-orientale”. Si tratta di 1156 nuovi dati, di cui 891 osservazioni in campo, GDWLG·HUEDULRVHJQDOD]LRQLELEOLRJUDAFKHUHFHQWLH derivate da revisioni di erbari storici. Sono stati registrati due generi nuovi per la Flora, ambedue esotici: Phyla e Sesamum. I...
Repertorio delle specie esotiche che vegetano sul corso superiore del fiume Oglio, con fotografie... more Repertorio delle specie esotiche che vegetano sul corso superiore del fiume Oglio, con fotografie, mappe distributive e duscussione sull'indice di inquinamento. Seguono tre allegati: Impatto sulla salute, umana, rapporti tra entomofauna ed esotiche, gestione dei boschi ripariali.
Vascular flora of the “high lands” of the Orobian Alps. This paper lists the alpine flora of the ... more Vascular flora of the “high lands” of the Orobian Alps. This paper lists the alpine flora of the Orobian Alps using field data, herbaria, and bibliographic sources. The maximum altitude at which the taxa were found is shown for the area covered by the four provinces. Floristic data are processed in order to provide the biological, chorological and ecological spectrum; the level of protection accorded to the identified flora is indicated. Finally, we hypothesize on the behaviour of the species in view of climate change, and a list of the taxa at greatest risk is provided.
ABSTRACTAim (1) To explore the impact of land use, climate and environmentalheterogeneity on fern... more ABSTRACTAim (1) To explore the impact of land use, climate and environmentalheterogeneity on fern species richness along a complete elevational gradient,and (2) to evaluate the relative importance of the three groups of variables withindifferent elevational intervals.Location A temperate mountain region (55,507 km 2 ) of Italy on the southernborder of the European Alps divided into a regular grid of 1476 cells (grain35.7 km 2 ).Methods We applied multiple regression (spatial and non-spatial) to determinethe relative influence of the three groups of variables on species richness,including variation partitioning at two scales. We considered the whole gradient(all 1476 cells) to explain the overall elevational pattern of species richness,and we grouped the cells into elevational intervals of 500 m in order toevaluate the explanatory power of the predictors within different zones along thegradient.Results Species richness showed a hump-shaped pattern with elevation, forminga plateau betw...
Aim Our aims were: (1) to separately evaluate the elevational patterns of b-diversity for nestedn... more Aim Our aims were: (1) to separately evaluate the elevational patterns of b-diversity for nestedness, species richness difference and replacement, (2) to identify the drivers of b-diversity patterns by testing the effect of geographical and environmental distance (human population, temperature and land-use), and (3) to compare the response on native versus alien species to elucidate mechanisms of community assembly along elevational gradients. Location Two mountain regions (Bergamo-Brescia and Trento) in the Italian Alps. Methods We used two floristic datasets in which species composition was sampled within two regular grids. First, we extracted species elevational range and quantified species composition nestedness along the elevational gradient. Second, we partitioned b-diversity into its species richness difference and replacement components and tested drivers using regression on distance matrix and hierarchical partitioning. All analyses were performed on natives and aliens, separately. Results For aliens, we found lack of mountain specialists (i.e. species with a distribution range restricted to high elevations), large nestedness, large species richness difference and low species replacement between low and high elevations. All findings point in the same direction: a great majority of alien species were introduced to the lowlands and only a subset of this community spread up the mountains. Both human pressures and temperature selection were important processes underpinning the observed filtering, while geographical and land-use distances were not important. Natives present contrasting patterns with large replacement along the elevation gradients indicating different mechanisms of community assembly. Main conclusions The relatively large alien species replacement in the lowlands indicated the presence of a pool of species that may potentially invade the temperate mountains in the future. Investigations of the identity of alien species occurring in the lowlands and their climatic pre-adaptation might provide tools to prevent invasions in the mountains by predicting the potential invaders and their future elevational distribution.
Discussione sul ruolo del conte Firmian sul suo periodo di reggente del Regno Lombardo veneto a M... more Discussione sul ruolo del conte Firmian sul suo periodo di reggente del Regno Lombardo veneto a Milano
Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology, 2016
The spread of the invasive and allergenic Ambrosia artemisiifolia L. in Italy was analysed and ma... more The spread of the invasive and allergenic Ambrosia artemisiifolia L. in Italy was analysed and mapped using distribution data from a wide range of sources. Ambrosia artemisiifolia occupies 1057 floristic quadrants which are mostly distributed in the Po plain. The distribution obtained represents the basis to implement urgent management strategies.
Atlante fotografico delle specie caratteristiche delle aree umide del Bacino Superiore del fiume ... more Atlante fotografico delle specie caratteristiche delle aree umide del Bacino Superiore del fiume Oglio.
A flora of the herbaceous component of the woods of the upper basin of the Oglio River and a sele... more A flora of the herbaceous component of the woods of the upper basin of the Oglio River and a selection of the most important monumental trees.
The exotic flora of the upper basin of the Oglio River and its tributaries is presented. Distribu... more The exotic flora of the upper basin of the Oglio River and its tributaries is presented. Distribution maps of the species involved.
Fantastic fable about the presence of the species of the genus Allium on the Upper basin of the O... more Fantastic fable about the presence of the species of the genus Allium on the Upper basin of the Oglio River.
118 species of Valle Camonica and Valle di Scalve are reported with ecological bioindication inde... more 118 species of Valle Camonica and Valle di Scalve are reported with ecological bioindication index and pictures.
ATLANTE FOTOGRAFICO DI BOTANICA RHATICA che raccoglie 133 specie di flora di pregio estetico o va... more ATLANTE FOTOGRAFICO DI BOTANICA RHATICA che raccoglie 133 specie di flora di pregio estetico o valore fitogeografico. 280 immagini e 133 carte distributive.
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