Search results for "Alien specie"
showing 10 items of 113 documents
The vegetation of temporary ponds of Sardinia
2009
The Mediterranean temporary ponds are considered priority habitat in the Directive 92/43/EEC (habitat n. 3170*) and detailed information on their floristic composition and susceptibility to invasive species seems a central issue for their preservation, because the development and maintenance of seasonal vegetation is merely the resultant of the development and maintenance of its component individuals. Sardinia presents fairly large extensions of land where such habitats are still well represented, thought not investigated in depth. Basing on literature and unpublished data, a survey on the current phytosociological knowledge of the temporary ponds of Sardinia is presented. Our field studies…
The impact of alien vascular plants in the aquatic habitats of a mediterranean island: preliminary data and observations in Sicily
2016
As is well known, invasive alien species pose a major global threat to the conservation of biodiversity, causing the extinction of native species and modifying ecosystem functions: this is true also for aquatic habitats, particularly susceptible to invasion due to usually high disturbance regimes and easy dispersal of propagules. The island of Sicily is one of the main hotspots of plant biodiversity, in the center of the Mediterranean basin; it hosts different types of freshwater habitats, both lentic (coastal wetlands, saltworks, temporary ponds, lakes, reservoirs) and lotic (springs, streams, permanent and seasonal rivers). As a first step of our analysis of the effects of the alien vascu…
Tree invasions in Italian forests
2022
Many forest tree species have been moved outside their native range to provide goods and services elsewhere, but some of them have become invasive, causing negative impacts on biodiversity and human activities. The assessment and knowledge on the degree and scale to which forest ecosystems are invaded by non-native trees is of paramount importance for tailored policies and strategies aiming at forest conservation. By analyzing main databases and literature and applying a four-level scale of invasion (not currently invaded and with low invasibility; potentially invasible; moderately invaded; massively invaded), we assessed the current and potential occurrence of twenty-five invasive non-nati…
Dikerogammarus villosus (Sowinsky, 1894) (Crustacea, Amphipoda) colonizes next alpine lake – Lac du Bourget, France.
2007
4 pages; Dikerogammarus villosus has been recorded for the first time in the alpine lake – Lac du Bourget, French Alps. Low abundance of the alien species in gathered samples suggests that the colonization is just in its initial stage. Two native gammarid species: Gammarus fossarum (Koch, 1835) and G. pulex (Linnaeus, 1758) are still present in the lake. The invader has most probably reached the lake through the Canal de Savières joining the lake to the Rhone River in which it has been already present since late 1990s.
Effects of Caulerpa cylindracea Sonder (Chlorophyta Caulerpaceae) on marine biodiversity
2019
The chief purpose of Marine Protected Areas (MPAs) is biodiversity conservation. The effects that invasive alien species (IAS) have on MPAs are not yet fully known, even though assessing them is fundamental. Effective management plans, indeed, also require knowledge on the dis- tribution, spread dynamics and impact of IAS. We report first observations on the effects of Caulerpa cylindracea Sonder (Chlorophyta Caulerpaceae) on the communities living along the coasts of the Island of Favignana (Egadi Islands MPA, Sicily, Italy). We found that C. cylindracea may have negative effects on the habitat where it settles in two different ways: a) affecting the structure of the native algal community…
Starzec wąskolistny Senecio inaequidens D.C. w pasie autostrady koło Brzegu na Śląsku Opolskim
2018
The paper presents the vegetation types with invasive Senecio inaequidens along the road verges in the Opole Silesia. The large population of this South-African species was located in the second half of June 2018 in the green belt (central reservation) along the A4 motorway (motorway section Brzeg – Opole).
Nowe stanowiska interesujących halofitów wzdłuż autostrady A-4 na Śląsku Opolskim
2018
The paper presents new sites of interesting synanthropic plants in the Opole Silesia. Three halophilous species,Plantago coronopus L. Spergularia marina (L.) Besser and Cochlearia officinalis L. were found on road verges of motorway A4 within the section Brzeg – Prądy. All species were observed with very large population sizes. They can thrive because of de-icing of the motorway surface with the application of sodium chloride spray.
Invasive Alien Species and Their Effects on Marine Animal Forests
2020
Nonindigenous species are increasingly transported around the world through multiple pathways by a diversity of vectors. Invasive species are a subset of those that are introduced into the receptor community, where they establish and increase their population to a size where they impact the native system. Marine invasive species can therefore interact with and modify native animal forests and/or create novel ones resulting in simple-to-complex changes in material cycling, energy flow, ecosystem structure, and function. Despite the ever increasing number of studies dealing with marine invasive species, mostly biological invasions are mentioned generically as one of a number of threats of dir…
Supplementary material 1 from: Galasso G, Domina G, Andreatta S, Angiolini C, Ardenghi NMG, Aristarchi C, Arnoul M, Azzella MM, Bacchetta G, Bartoluc…
2019
: Data type: species data
Supplementary material 1 from: Galasso G, Domina G, Alessandrini A, Ardenghi NMG, Bacchetta G, Ballelli S, Bartolucci F, Brundu G, Buono S, Busnardo …
2018
Supplementary data : Explanation note: 1. Nomenclature updates; 2. Note updates; 3. Distribution updates; 4. Synonyms, misapplied or included names.