1,720,978 research outputs found
Assessing the influence of source distance and hydroecoregion on the invertebrate assemblage similarity in central Italy streams
No full textIncreasing the river habitat safeguard level is one of the main actions proposed by the
European Water Framework Directive in the field of biomonitoring. To do so, watercourses
within the same hydroecoregions (that is, homogeneous areas based on climate, geology and
topography) ought to be compared. In addition, the source distance was thought to play an
important role in comparing rivers and then planning monitoring activities. The purpose of
this study was to evaluate if both hydroecoregion and source distance affect the response
(in terms of taxa assemblage) of one of the most used group in the river monitoring
activities: the benthic macroinvertebrate. Here we proposed the comparative influence of
hydroecoregion and source distance on the invertebrate assemblage in Mediterranean rivers
of central Italy. Our statistical outputs highlighted how macroinvertebrate differed for
both hydroecoregions and source distance ranks. In particular, no differences were found
among sites of different (1) source distance ranks and (2) hydroecoregion (that is, when
this two descriptors were analyzed separately), while the highest difference in the
macroinvertebrate assemblage was observed between the same source distance ranks of
different hydroecoregions. Our results showed how the use of both hydroecoregion and
source distance should be considered for planning monitoring activities to properly manage
rivers and water resources
Detecting Intraspecific Character Displacement by Morphological Markers in Riverine-Dwelling Invertebrate Larvae: The Case Study of Head Shape Variability in Leuctra fusca (Plecoptera: Leuctridae)
No full textWind-driven rain as a bioclimatic factor affecting the biological colonization at the archaeological site of Pompeii, Italy
No full textThe weathering role of Wind-Driven Rain (WDR) on buildings is widely recognised from a physical point of view, but the influence of WDR on Biological Growth (BG) on stone materials to cause biodeterioration is still not well studied. Following our previous results from the Roman area, the UNESCO site of Pompeii for its importance was selected to further test relationships between WDR and BG. We collated and analysed climatic data (rainfall, direction and intensity of winds) between 2010 and 2015 to delineate the thermo-pluvial diagram and extrapolate Dominant Winds (DW) and WDR. Data on BG, consisting mainly of cyanobacteria, algae and lichens, were also collected through sampling, direct observations and analysis of high-quality photos. The climatic elaborations highlighted a dominance of the West wind influencing WDR. The BG was more prominent on the northern and western exposures, while it was considerably less extensive on the southern walls. Our results also showed that water from WDR, together with the lower temperature in the northern exposure and poor ventilation, can all affect wetness and had a profound role in the promotion of BG. Our analyses suggest that the protection of building walls should be different according to the exposure conditions in the formulation of preventive strategies for conservation
La diffusione della specie aliena invasiva ailanthus altissima (miller) swingle minaccia la stabilità delle opere murarie nell’area archeologica di Pompei
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Tolerance of increasing water salinity in the red swamp crayfish Procambarus clarkii (Girard, 1852)
No full textGli stressori ambientali determinano risposte convergenti tra macrofite e macroinvertebrati delle acque correnti? Un contributo dal centro Italia.
No full textHydromorphological discontinuities deeply modify the benthic multi‐species assemblage diversity in a Mediterranean running river
No full textThe aim of the study was to investigate the modifications of the macroinvertebrate multi-species assemblage in relation to hydromorphological discontinues, since macroinvertebrates are traditionally exploited in water quality assessment activities. Three sampling sites characterized by different hydrological characteristics were selected in five stations along the River Aniene in Central Italy. We evaluated the macroinvertebrate structure, traits, biotic and diversity indices in relation to the erosive power. Among macroinvertebrate taxa, Elminthidae and Chironomidae families showed a particular occurrence pattern associated with the site at the base of vertical drop, characterized by the stronger hydrodynamic. However, the water quality status was high, not showing differences between the three sites. Our finding has a novelty value as similar studies on the investigation of the hydromorphological discontinuities on macroinvertebrate structure and ecological traits are very scarce in the literature
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