1,721,138 research outputs found
Logica Fuzzy: prospettive di applicazione nella ricerca ecologica. In: Casagrandi R. e Melià P. (Eds).
No full textUpdating of non-indigenous macroalgae In the Italian coasts: new introductions and cryptic species.
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TWIN: a TWo-stage INdex to evaluate ecological quality status in lagoon environments by means of hard bottom zoobenthos
No full textThe macrobenthos colonizing the artificial hard bottoms in lagoons has been used in biomonitoring programs as it requires easy sampling procedures and provides a variety of responses to different environmental pressures, like marine or continental influence, eutrophication, and urban pollution. In this paper we present the development and application of a new TWo-stage INdex (TWIN), aimed to assess water quality of lagoon environments using the hard bottom macrobenthos community. TWIN is calculated in two separate stages. First, the presence and abundance of macrobenthic species are used to define, through a fuzzy model, a station's membership grade in six pre-defined ecological sectors (Lagoon Mouth, Vivified Lagoon, Rough Eutrophic, Calm Eutrophic, Urban, Estuarine), each corresponding to characteristic communities. Then a formula links the membership grades to the five ecological status classes ranging from high to bad quality, as requested by the European Water Framework Directive. This method was tested in four Adriatic lagoons: the results are consistent with literature information and expert judgement, therefore we propose its use in the definition of water quality in lagoons
La comunità macrobentonica della Sacca di Goro (Adriatico Settentrionale) analizzata mediante un modello a logica fuzzy
No full textModelling Ecological Processes with Fuzzy Logic Approaches
No full textModel development is of vital importance for understanding and management of ecological processes. Identifying the complex relationships between ecological patterns and processes is a crucial task. Ecological modelling—both qualitatively and quantitatively—plays a vital role in analysing ecological phenomena and for ecological theory. This textbook provides a unique overview of modelling approaches. Representing the state-of-the-art in modern ecology, it shows how to construct and work with various different model types. It introduces the background of each approach and its application in ecology. Differential equations, matrix approaches, individual-based models and many other relevant modelling techniques are explained and demonstrated with their use. The authors provide links to software tools and course materials. With chapters written by leading specialists, “Modelling Complex Ecological Dynamics” is an essential contribution to expand the qualification of students, teachers and scientists alike
Developing fuzzy indices of ecological conditions: a user-friendly, open-source software tool for ecologists
No full textMarinas may act as hubs for the spread of the pseudo-indigenous bryozoan Amathia verticillata (Delle Chiaje, 1822) and its associates
Full text linkThe spaghetti bryozoan Amathia verticillata, formerly known as Zoobotryon verticillatum, was first described in 1822 from Naples, Italy, although this species was already present in 1807 at Cadiz, Spain. This ctenostome has long been considered a native species in the Mediterranean Sea but it has recently been suggested to be of Caribbean origin. It is most likely to have been introduced by vessels as hull fouling. This pseudo-indigenous species, i.e. a non-indigenous species (NIS) having been perceived to be native, has been found in several marinas and harbours within the Mediterranean Sea. In November 2014, this bryozoan species was abundant in the La Grande Motte marina on the south coast of France. Several thousand colonies were estimated to be present within this marina attached to the floating pontoon units that supported a floating boardwalk. Of the berthed craft examined, 31% were fouled with this species, and it was occasionally a prominent fouling species. Several macroinvertebrate species were associated with A. verticillata colonies, including some NIS, Paracerceis sculpta, Paranthura japonica and Caprella scaura, that are recorded for the first time from the Mediterranean coast of France. A. verticillata might support their transfer elsewhere by providing a habitat and substrate when attached to vessel hulls
The relative importance of aquaculture and shipping as vectors of introduction of marine alien species: the case of Olbia (Sardinia)
No full textThe macroinvertebrate assemblage in Olbia (Sardinia, Italy) was analysed for occurrence of marine alien species. Two main vectors of introduction operate in this area: vessels and aquaculture. The comparison with alien species assemblages of other three Italian localities connected to Olbia by different pathways (vessels: Genoa, Leghorn; aquaculture: Venice) suggests that shellfish stocking is a major vector operating in Olbia
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