Search results for "PES"

BioCultural Landscapes per la rigenerazione innovativa dei territori di montagna

2017

Simplification of agricultural systems, farmland abandonment, uncontrolled urbanization, together with global scale drivers, determine fast and unpredictable phenomena of hydrogeological instability, biodiversity decline and identity loss. Men should hence promote socio-economic resilience and place identity, using biocultural landscapes as a resource. These landscapes are the outcome of the historical relationship between man and nature, resulting from complex interactions between biodiversity (at all levels, including species richness, ecosystem and biotope diversity) and cultural diversity, including material and immaterial aspects (architectural heritage, traditions, customs, local trad…

Note su un bloom di Prymnesium parvum Carter (Haptophyta) nel lago di Pergusa e sue conseguenza sulla fauna.

2008

Dal 17 febbraio ai primi giorni di marzo 2008 è stata registrata una morìa di centinaia di Carpe (Cyprinus carpio) nel Lago di Pergusa, in coincidenza di un’anomala colorazione giallastra delle acque ascrivibile ad un intenso bloom dell’aptofita ittiotossica Prymnesium parvum. La microalga manifesta comunemente bloom e tossicità in acque eutrofiche poco profonde, con salinità comprese fra 1 e 12 PSU. Il bloom tossico nel Lago Pergusa, per quanto determinato dalla complessa interazione di numerosi fattori ambientali, è essenzialmente connesso alle mutate condizioni di salinità del corpo idrico negli ultimi 5 anni (da >20 PSU a <5 PSU). Sebbene non abbia causato mortalità nelle popolazioni di…

I pesci "taggati"

2010

Stable isotope analysis of trophic niche in two co-occurring native and invasive terrapins, Emys orbicularis and Trachemys scripta elegans

2016

A trophic niche overlap in native and alien turtle species can lead to competitive interactions whereby allochthonous turtles may outcompete autochthonous individuals and eventually affect viability of natural populations. The European pond turtle (Emys orbicularis) is an autochthonous species threatened by habitat encroachment and competition with the red-eared slider (Trachemys scripta elegans). The latter is an invasive species introduced in Europe from midwestern United States as a pet and now widespread in the natural habitats of E. orbicularis. The extent of trophic competition between E. orbicularis and T. s. elegans in northern Italy was assessed by nitrogen and carbon stable isotop…

Beyond the mean: A comparison of trace- and macroelement correlation profiles of two lacustrine populations of the crayfish Procambarus clarkii

2018

In invertebrate biomonitors of chemical pollution, emphasis has been generally given to mean accumulation patterns and how they reflect varying environmental levels of contamination. Intra-population variability, and how it relates with individual phenotypic traits, has received less attention. Here, a set of analytes including trace elements (B, Ba, Cd, Cr, Cu, Fe, Li, Mn, Ni, Pb, Sr, V, and Zn), macroelements (C, Ca, K, Mg, N, Na), and carbon and nitrogen stable isotopes (δ13C and δ15N) was measured in two populations of the crayfish Procambarus clarkii from Lake Trasimeno and Lake Bolsena (Central Italy). The influence of location, sex, body size, and condition factor was assessed; in ad…

Eco-physiological response of two marine bivalves to acute exposition to commercial Bt-based pesticide

2013

Microbial products based on the entomopathogenic bacterium Bacillus thuringiensis (Bt) are among the most common biopesticides used worldwide to suppress insect pests in forests, horticulture and agricultural crops. Some of the effects of commercial Bt have been recorded for terrestrial and freshwater non-target organisms but little research is available on marine fauna. Nevertheless, due to the contiguity of agro-ecosystems and coastal habitats, marine fauna may be highly influenced by this control method. We studied the effect of a commercial Bt product on the physiological and ecological responses and the energy budget of two of the most frequent marine intertidal bivalves in the Mediter…

Spatial variability of macrozoobenthic community and trophic structure of a subtropical lagoon in the Southeastern Atlantic coast

2013

Towards a landscape scale management of pesticides: ERA using changes in modelled occupancy and abundance to assess long-term population impacts of p…

2015

Pesticides are regulated in Europe and this process includes an environmental risk assessment (ERA) for nontarget arthropods (NTA). Traditionally a non-spatial or field trial assessment is used. In this study we exemplify the introduction of a spatial context to the ERA as well as suggest a way in which the results of complex models, necessary for proper inclusion of spatial aspects in the ERA, can be presented and evaluated easily using abundance and occupancy ratios (AOR). We used an agent-based simulation system and an existing model for a wide-spread carabid beetle (Bembidion lampros), to evaluate the impact of a fictitious highly-toxic pesticide on population density and the distributi…

Indagine sul contributo delle fonti bentoniche e planctoniche alla rete trofica del reef a vermeti

2009

Individual and population-scale carbon and nitrogen isotopic values of Procambarus clarkii in invaded freshwater ecosystems

2022

Este artículo contiene 16 páginas, 1 figura, 1 tablas.