Search results for "Trophic relationship"
showing 3 items of 3 documents
Relationships between suspended and sediment organic matter in a semi- enclosed marine system: The Stagnone di Marsala sound (Western Sicily)
1997
To gather information on the interactions between the sediment and suspended organic matter pools in the Stagnone di Marsala, water and sediment samples were collected, on a monthly basis, at 11 stations. Water temperature and salinity showed a clear seasonality whilst particulate and sediment organic matter did not show any clear seasonal pattern. Relative abundances of suspended and sediment organic matter, on the other hand, appeared to be site-dependent and controlled mainly by the dynamic balance between resuspension and sedimentation. High quantities of both suspended and sediment total organic matter were present, while very low algal biomasses (in terms of chlorophyll-a concentratio…
Le comunità di fillominatori e parassitoidi della Riserva Naturale “Bosco d’Alcamo” (Sicilia)
2015
È stata studiata la comunità di fillominatori e parassitoidi su 16 specie di piante spontanee della Riserva Naturale “Bosco d’Alcamo”. Sono state rinvenute 17 specie di Lepidoptera e 7 specie di Diptera. Da queste sono sfarfallate circa 20 specie di parassitoidi, perlopiù rappresentate da Eulophidae e Braconidae. Viene confermata la presenza in Sicilia del Gracillariidae Phyllonorycter trifasciella Haworth e dell’Eulophidae Derostenus gemmeus Westwood. Per la prima volta Sympiesis notata (Zetterstedt) e Cirrospilus viticola (Rondani) sono stati rinvenuti come parassitoidi di Emme- tia marginea (Haworth). Inoltre S. notata è stata rinvenuta anche come parassitoide di P. trifasciella. Nel com…
Benthic‐pelagic coupling and trophic relationships in northern Baltic Sea food webs
2020
Understanding marine ecosystem structure and functioning is crucial in supporting sustainable management of natural resources and monitoring the health of marine ecosystems. The current study utilized stable isotope (SI) mixing models and trophic position models to examine energy flow, trophic relationships, and benthic‐pelagic coupling between food web components. Roughly 1900 samples from different trophic levels in the food web, collected during 2001–2010 from four northern and central sub‐basins of the Baltic Sea, were analyzed for SI ratios of carbon and nitrogen. Trophic structure of the food webs among the sub‐basins was consistent, but there were differences between the proportions …