Il nuovo codice degli appalti D.lgs 50, 18 Aprile 2016

Presenta: Ugo Palmieri

Segretario generale Comune di Stresa

Con l'entrata in vigore del decreto legislativo 18 aprile 2016, n. 50, pubblicato nella G.U. Serie Generale n. 91 del 19 aprile 2016 - Supplemento Ordinario n. 10, cambiano le regole relative ai contratti pubblici.
Venerdì pomeriggio, il Dott. Palmieri, segretario Generale del Comune di Stresa, terrà un seminario presso l'Istituto per illustrare a quanti siano interessati e coinvolti nel processo cosa cambia dopo l'entrata in vigore del nuovo Codice.

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Marine Litter e Beach Litter: definizioni, impatti, risposte

Presenta: Gianluca Poeta

Università degli Studi Roma Tre, Dipartimento di Scienze

I rifiuti presenti in mare e lungo le coste di tutto il mondo costituiscono forse la più grande minaccia per l'intero sistema marino: la quantità prodotta, la loro persistenza ed eterogeneità di forma e dimensioni hanno permesso a questo elemento di disturbo di disperdersi in ogni mare, fondale o spiaggia della Terra. Globalmente sono stati immessi nei mari e negli oceani di tutto il mondo più di 12 milioni di tonnellate di rifiuti solo nel 2010 e ad oggi sono state osservate più di 700 specie diverse impattate da questa minaccia, molte delle quali già a rischio estinzione. Recenti studi hanno dimostrato come i rifiuti marini, ed in particolar modo la plastica, sono entrati nelle catene trofiche, mettendo a rischio anche la salute umana.
La presenza di rifiuti sulle nostre coste è forse il segnale più diretto dell'inquinamento marino.
I campionamenti dei rifiuti spiaggiati sono indispensabili per conoscere la tipologia, la quantità e le cause della presenza dei rifiuti marini e l'individuazione delle sorgenti di rifiuto costituisce, insieme con l'educazione, il primo strumento necessario per combattere questa minaccia.

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The impact of disturbance factors on a lake microbial community in a continuous culture system

Presenta: Giuliana Manfredini

Università degli Studi di Milano

Antibiotics (ABs) are the most efficient treatment available against infections. Unfortunately, their massive use and general misuse in the last century reduced their efficiency. A strong correlation between human activities and the amount of ABs recovered in aquatic environments has been demonstrated. Better knowledge on the cycle of ABs in the environment is needed to understand the role of the environment in the promotion, persistence and spread of AB resistances. A continuous culture system (chemostat) experiment has been designed to evaluate the impact of low-dose AB pollution and of allochthonous
species on the natural microbial community of Lake Maggiore. Tetracycline (TET; one of the most used ABs in the last 50 years) and a population of Escherichiacoli (a faecal indicator bacterium) were introduced at two time points in the experiment. Our study demonstrates that the lake microbial community is
sensitive to the introduction of TET, that promotes an immediate effect on its aggregational behaviour.

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Monitoring and understanding impacts of environmental change on alpine and peri-alpine freshwater ecosystems

Presenta: Andreas Bruder

Institute of Earth Sciences, University of Applied Sciences and Arts of Southern Switzerland (SUPSI)

Freshwater ecosystems of the Southern Alps are simultaneously affected by eutrophication, acidification and climate change with strong impacts on their biota and functioning. SUPSIs limnology/hydrogeology group is addressing these issues in research and monitoring programmes encompassing a range of ecosystem types and organism groups. The principal goal of this seminar is to provide an overview of our main research activities focusing on: i) the consequences of environmental change on the ecology and key ecosystem processes of Lago Lugano. Since the 1980s, the lake has been subjected to a restoration program focusing on reductions in external phosphorus loading to reduce its trophic state. While the restoration program has been successful, our long-term data shows that the consequences on key parameters of the planktonic community are difficult to predict; ii) the impacts of atmospheric pollutants on the high-alpine catchment of Lago Nero (central Alps). This lake is affected by high inputs of atmospheric pollutants, which have potentially acidifying and eutrophying effects on the ecosystem. Furthermore, based on its thermal characteristics, the lake may be particularly sensitive to increases in temperature as a consequence of climate change; and iii) on the consequences of anthropogenic impacts on stream ecosystems based on novel molecular tools for aquatic fungi (hyphomycetes). This group of higher fungi plays pivotal roles in the functioning of food-webs in forested streams through their role in litter decomposition.

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Limnoloecology of ecotone lakes in Finnish Lapland – Present and past

Presenta: Liisa Nevalainen

Department of Biological and Environmental Science, University of Jyväskylä, Finland

A set of lakes across north boreal forest to subarctic tundra in Finnish Lapland were investigated for limnoloecological variability, including mapping of catchment properties, limnology, sediment biogeochemistry, and aquatic communities. The aim was to understand high latitude catchment–lake coupling processes, with a focus on terrestrial organic carbon and bio-optics, and systems' vulnerability to climate warming in a spatial and long-term temporal context. The results suggested that the ecotone lakes preserve wide limnological and biogeochemical diversity that is mainly controlled by wetland coverage of the catchments, fueling heterotrophic (dissolved organic carbon) and autotrophic (nutrients) productivity. Nutrients and input of terrestrial organic carbon were also main drivers for community composition, stable isotope fingerprints, and UV-protective pigmentation of aquatic invertebrates. Preliminary down core investigations indicated that the 20th century climate warming has increased terrestrial carbon inputs and enhanced aquatic production relative to the preceding centuries. The results suggested that the complex interactions between climate, catchment vegetation, lake metabolism, and aquatic communities make these shallow ecotone lakes highly prone to climate-induce shifts in organic carbon sequestration.

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