1,721,033 research outputs found

    Interpretation and management of the forest habitats of the Italian peninsula.

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    The article aims to present the Italian peninsula forest biodiversity based on the habitats listed under Annex I of the Habitats Directive 92/43/EEC. This put on evidence for the area, five categories corresponding to the codes 91 (Forests of temperate Europe), 92 (Mediterranean deciduous forests), 93 (Mediterranean sclerophyllous forests), 94 (Temperate mountainous coniferous forests) and 95 (Mediterranean and Macaronesian mountainous forests coniferous). After a brief presentation of the physical and biogeographical factors that characterize the Italian peninsular area, we proceed to review the different types of forest habitats acknowledged by the Directive for the Italian peninsula, highlighting their syntaxonomic position which is summarized in a complete syntaxonomic scheme. Regarding the habitat 91AA * "Eastern white oak woods" species related to the white oak group previously considered in synonymy (Quercus pubescens sl) have been recognized. This led to the correction of the association Roso sempervirentis-Quercetum pubescentis Biondi 1986 into Roso-sempervirentis-Quercetum virgilianae and the description of new associations (Arundo plinianae-Quercetum virgilianae, Ampelodesmo mauritanici-Quercetum virgilianae, Lauro nobilis-Quercetum virgilianae) and some new subassociations. In the conclusions some certain shortcomings and delays in implementing the Habitats Directive in Italy are highlighted

    Nitrophilous and ruderal species as indicators of climate change. Case study from the Italian Adriatic coast.

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    The aim of the present study is to demonstrate the value of some nitrophilous plants as bioindicators related to global warming. As a case study, the space–time dynamics of the populations of some nitrophilous and ruderal species have been investigated along the southern-central Adriatic side of the Italian Peninsula. These have been examined according to the range of their distribution areas, to their ecological needs, and to the availability of past data, which have then been related to the data on global warming across the same territories. The choice for this investigation was for nitrophilous species with a Mediterranean distribution – of the Stenomediterranean type – and for some recent entries into the local flora as alien species. The spread of these species occurs in areas with intense human activity, where they have exploited the conditions of the warmer niche, such that their presence and their spatial spread observed over time are clearly linked to global warming. For all of the species in question, rapid increases in the population numbers have been observed, along with a northward shift of their distribution areas. These changes correspond to the increase in average annual temperature as revealed by the thermometric measurements
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