Giacomo Calvia

Taxus baccata is a relic declining species, especially at the southern margins of its natural distribution, such as the Mediterranean and Irano-Turanian biogeographic regions. On the Island of Sardinia, it is still present in many mountain sites. This study identified 232 locations where yews grow. The species is indifferent to substrates, but pref...

The effect of key ecological and anthropic factors on the recruitment of the common yew (Taxus baccata L.) in Sardinia (Italy) has been analyzed. After bibliographic and cartographic research, followed by field surveys, we found 232 sites where yew grows in Sardinia (as opposed to 69 previously reported in the literature). Among them, we selected 4...

In this contribution, new data concerning the distribution of native vascular flora in Italy are presented. It includes new records, confirmations, and status changes to the Italian administrative regions. Nomenclatural and distribution updates, published elsewhere, and corrigenda are provided as Suppl. material 1.

In this contribution, new data concerning the distribution of vascular flora alien to Italy are presented. It includes new records, confirmations, and status changes for Italy or for Italian administrative regions. Nomenclatural and distribution updates, published elsewhere, and corrections are provided as Suppl. material 1

Temporal changes in the distribution range of plant communities and habitats should be considered for optimal conservation. However, this information is often lacking. In this research, we investigated the changes in the spatial distribution pattern of the plant communities characterised by the presence of three dominant Mediterranean pines conside...

In this contribution, new data concerning the distribution of vascular flora alien to Italy are presented. It includes new records, confirmations, exclusions, and status changes for Italy or for Italian administrative regions. Nomenclatural and distribution updates published elsewhere are provided as Suppl. material 1.

The vascular flora of Sardinia has been investigated for more than 250 years, with particular attention to the endemic component due to their phylogeographic and conservation interest. However, continuous changes in the floristic composition through natural processes, anthropogenic drivers or modified taxonomical attributions require constant updat...

The vascular flora of Sardinia has been investigated for more than 250 years, with particular attention to the endemic component, due to their phylogeographic and conservation interest. However, continuous changes in the floristic composition through natural processes, anthropogenic drivers or modified taxonomical attributions require constant upda...

In this contribution, new data concerning the distribution of vascular flora alien to Italy are presented. It includes new records, confirmations, exclusions, and status changes for Italy or for Italian administrative regions. Nomenclatural and distribution updates published elsewhere are provided as Suppl. material 1.

In this contribution, new data concerning the distribution of native vascular flora in Italy are presented. It includes new records, confirmations, exclusions, and status changes to the Italian administrative regions. Nomenclatural and distribution updates, published elsewhere, and corrigenda are provided as Suppl. material 1.

Mediterranean pine woodlands are one of the most common wooded vegetation types across the Mediterranean Basin and are included in two habitats of European interest as they have great conservation importance. We studied the woodlands of the class Pinetea halepensis dominated by Pinus halepensis, P. pinaster, and P. pinea in Sardinia (Italy) with th...

New Italian data on the distribution of the Annex I Habitats 3170*, 6110*, 91E0*, 9320, 9330 are reported in this contribution. Specifically, one new occurrence in Natura 2000 sites is presented and six new cells are added in the European Environment Agency 10 km × 10 km reference grid. The new data refer to the Italian administrative regions of Sa...

In this contribution, new data concerning the distribution of vascular flora alien to Italy are presented. It includes new records, confirmations, exclusions, and status changes for Italy or for Italian administrative regions. Nomenclatural and distribution updates published elsewhere are provided as Suppl. material 1.

Great longhorn beetles (GLBs) may affect forest structure, because their larvae colonize trees and create networks of cavities further exploited by other species, resulting in dead or broken branches and tree mortality. At the same time, tree size, condition and location are known to affect the likelihood of tree colonization by GLBs. Here, we stud...

New localities and/or confirmations concerning 74 specific and subspecific plant taxa of Tuscan vascular flora, belonging to 69 genera and 28 families are presented: Bunium, Trinia (Apiaceae), Nerium (Apocynaceae), Lemna (Araceae), Artemisia, Bidens, Centaurea, Crupina, Gazania, Hieracium, Rhagadiolus, Symphyotrichum, Tagetes, Tripleurospermum (Ast...

Mount Limbara is located in the north-eastern part of Sardinia (Italy). It is the third highest peak of the island and covers an area of 262.47 km². In the past, the studies concerning the flora of this mountain interested only restricted sectors or specific taxa, but a comprehensive floristic study of the whole territory was lacking. An annotated...

In this contribution, new data concerning the distribution of vascular flora alien to Italy are presented. It includes new records, confirmations, exclusions, and status changes for Italy or for Italian administrative regions. Furthermore, three new combinations are proposed. Nomenclatural and distribution updates published elsewhere are provided a...

In this contribution, new data concerning the distribution of native vascular flora in Italy are presented. It includes new records, confirmations, exclusions, and status changes to the Italian administrative regions. Two new combinations are proposed. Nomenclatural and distribution updates, published elsewhere, and corrigenda are provided as Suppl...

Mediterranean forests have been altered by several human activities. Consequently, relatively intact forests that have been unmodified by humans for a relatively long time (i.e., old-growth forests) are often reduced to isolated and fragmented stands. However, despite their high conservation value, little is known about their features and even pres...

In this contribution, new data concerning the distribution of native vascular flora in Italy are presented. It includes new records, confirmations, exclusions, and status changes to the Italian administrative regions for taxa in the genera Ajuga , Chamaemelum , Clematis , Convolvulus , Cytisus , Deschampsia , Eleocharis , Epipactis , Euphorbia , Gr...

In this contribution, new data concerning the distribution of vascular flora alien to Italy are presented. It includes new records, confirmations, exclusions, and status changes for Italy or for Italian administrative regions of taxa in the genera Bunias, Calocedrus, Calycanthus, Celosia, Clerodendrum, Convolvulus, Crassula, Cyclamen, Datura, Dicli...

We assessed the changes in community-weighted mean (CWM) and variability of specific leaf area (SLA) and leaf area (LA) of different Mediterranean shrub communities along an elevation gradient in the island of Sardinia (Italy). Furthermore, we explored the relative contribution of species turnover and intraspecific variation to shifts in CWM values...

In this contribution, new data concerning the distribution of vascular flora alien to Italy are presented. It includes new records, confirmations, and status changes for Italy or for Italian administrative regions of taxa in the genera Abies, Actinidia, Aloe, Amaryllis, Anredera, Arctotheca, Bidens, Cardiospermum, Celosia, Commelina, Cotoneaster, C...

In this contribution, new data concerning the distribution of native vascular flora in Italy are presented. It includes new records, confirmations and status changes to the Italian administrative regions for taxa in the genera Acer , Alchemilla , Andrachne , Bromus , Clinopodium , Colchicum , Damasonium , Erodium , Festuca , Hieracium , Hyparrhenia...

In this contribution, new data concerning the distribution of vascular flora alien to Italy are presented. It includes new records, confirmations, exclusions, and status changes for Italy or for Italian administrative regions of taxa in the genera Acalypha, Acer, Canna, Cardamine, Cedrus, Chlorophytum, Citrus, Cyperus, Epilobium, Eucalyptus, Euphor...

In this contribution, new data concerning the distribution of native vascular flora in Italy are presented. It includes new records, confirmations and status changes to the Italian administrative regions for taxa in the genera Alchemilla , Arundo , Bupleurum , Clematis , Clinopodium , Cota , Crassula , Cytisus , Euphorbia , Hieracium , Isoëtes , La...

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 ,...

In this contribution the conservation status assessment of six plant species according to IUCN categories and criteria are presented. It includes the assessment at global level of Charybdis glaucophylla Bacch., Brullo, D’Emerico, Pontec. & Salmeri, Euphorbia nicaeensis All. subsp. japygica (Ten.) Arcang., Hieracium australe Fr. subsp. australe, Lim...

Riassunto: È descritta e illustrata con fotografie a colori e disegni di microscopia una raccolta di Leucopaxillus monticola dal Monte Limbara, la prima per la flora micologica della Sardegna. Abstract: A collection of Leucopaxillus monticola from the Limbara mountain, the first one for the mycological flora of Sardinia,is described and illustrate...

Abstract - ALESSANDRO RUGGERO & GIACOMO CALVIA - Plants rare and of particular phytogeographical interest of the Mount Limbara and bordering areas (Northern Sardinia). Are here reported some entities rare or of remarkable phytogeographical interest, found in the area of Mount Limbara massif (Northern Sardinia) and in the bordering countries, follow...

The present work reports the check-list of the wild orchids of Olbia-Tempio province (Northeastern Sardinia). This research is the result of the authors investigation as a contribution to the knowledge of the Orchidaceae for this area. A list of 34 species and 6 natural hybrids is reported by personal observations more than 6 species derived from l...

A new station of Ophrys subfusca subsp liverani Orrù & Grasso at Platamona is here reported. It is the first station for the province of Sassari and the second after the locus tipicus.

We report on a population of Serapias nurrica Corrias from Mount Limbara, altitude 850 metres. This record extends the altitudinal range of the species in Sardinia, approaching it to the one known for Sicily.

1413. Marsilea strigosa Willd. (Marsileaceae) 1414. Hypericum androsaemum L. (Hypericaceae) 1415. Anthriscus caucalis M. Bieb. (Apiaceae) 1416. Deschampsia flexuosa (L.) Trin. (Poaceae) 1417. Leersia oryzoides (L.) Sw. (Poaceae)