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Bioindication has become an indispensable part of water quality monitoring in most countries of the world, with the presence and abundance of bioindicator taxa, mostly multicellular eukaryotes, used for biotic indices. In contrast, microbes (bacteria, archaea and protists) are seldom used as bioindicators in routine assessments, although they have been recognized for their importance in environmental processes. Recently, the use of molecular methods has revealed unexpected diversity within known functional groups and novel metabolic pathways that are particularly important in energy and nutrient cycling. In various habitats, microbial communities respond to eutrophication, metals, and natural or anthropogenic organic pollutants through changes in diversity and function. In this review, we evaluated the common trends in these changes, documenting that they have value as bioindicators and can be used not only for monitoring but also for improving our understanding of the major processes in lotic and lentic environments. Current knowledge provides a solid foundation for exploiting microbial taxa, community structures and diversity, as well as functional genes, in novel monitoring programs. These microbial community measures can also be combined into biotic indices, improving the resolution of individual bioindicators. Here, we assess particular molecular approaches complemented by advanced bioinformatic analysis, as these are the most promising with respect to detailed bioindication value. We conclude that microbial community dynamics are a missing link important for our understanding of rapid changes in the structure and function of aquatic ecosystems, and should be addressed in the future environmental monitoring of freshwater ecosystems.

Il Metapub Project Archive è il database CDS/Isis prodotto dal progetto: Un prototipo CNR di Biblioteca Digitale per la Scienza e la Tecnica - Progetti 2005 per il Servizio Civile Nazionale. Il manuale descrive le modalità di installazione e gestione del sistema. In modo particolare, viene descritto come inserire e cancellare nuove collezioni e come mantenere l'aggiornamento automatico del sistema e del suo recovery. In altra parte vengono suggerite le modalità di personalizzazione delle interfacce utente e le modalità di distribuzione geografica delle collezioni su server remoti ma collocati più vicini ai produttori dei dati. In ultimo vengono descritte le procedure di recovery sia hardware che software

The aim of PUMA & MetaPub system is to assist scientists to make their research results immediately available world-wide, and to provide them with appropriate on-line facilities to self archiving their publications. The intention of the presentation is to give an idea of the system functionality and the Common User Interfaces. MetaPub provides advanced search functionalities and implements the OAI-PMH protocol, harvesting is allowed under authorization.

MetaBook is an information retrieval system designed to find information stored on some CNR Catalogs. The search engine allows users to send queries to one, to a selection or to all catalogs at the same time. This paper is a brief guide of the user interface

Common User Interface of PUMA for administrators: manual Version 1.0

Common User Interface of PUMA for users: manual Version 1.1

In recent years a number of positive (i.e. tractability and decidability) results have been found concerning the computational complexity of Description Logics (DLs) Unfortunately, also negative results have appeared which show that some DLs (e.g NIKL and KL-ONE) are undecidable. This work contributes to this latter literature by showing an undecidability result for another DL (called MIRTL) which had not been previously studied from the standpoint of computational complexity and which is not directly related to the ones already shown undecidable.

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