Search results for "stable isotopes."
showing 10 items of 149 documents
Trace metal transfer in the food webs of a semi-enclosed coastal ecosystem (Stagnone di Marsala, Sicily, Italy)
2010
Inter-habitat connectivity in a tropical ecosystem (Gazi Bay, Kenya) as revealed by ichthyofauna
2010
Exploitation of food sources by ichthyofauna in the Acquatina coastal system (Apulia, Italy)
2010
Diet and trophic interactions of Paracentrotus lividus and Arbacia lixula in two alternative stable states of the Mediterranean rocky sublittoral com…
2010
Stable carbon and nitrogen ratios (δ13Corg and δ15Ntot) of core sediments from the Gulf of Palermo (NW Sicily): implications for the carbon source
2010
Food web structure in Mediterranean coastal lagoons under different trophic conditions
2011
Uso trofico dell’habitat da parte dell’ittiofauna in una piccola laguna costiera mediterranea
2011
Stable isotopes and trophic positions of littoral fishes from a Mediterranean Marine Protected Area
2008
Stable isotope analyses were employed to explore feeding and foraging habitats and trophic levels of littoral fishes in a western Mediterranean Marine Protected Area (Egadi Islands, Sicily, Italy). Carbon and nitrogen stable isotope ratios were measured in primary producers, invertebrates and fishes collected in December 2001 and January 2002. Fishes of the littoral region of the Egadi Islands had isotopic signatures that fell into a wider range for δ13C (about 6‰) than for δ15N (about 3‰). Carbon isotope ratios were consistent with a food web based on mixed sources and two trophic pathways leading to different fish species. Differences in the isotopic composition between islands were highe…
Paleoenvironmental changes during the calcare di base deposition a prelude to the Messinian salinity crisis.
2006
Carbonate stromatolites from a Messinian hypersaline setting in the Caltanissetta Basin, Sicily: petrographic evidence of microbial activity and rela…
2010
Lower Messinian stromatolites of the Calcare di Base Formation at Sutera in Sicily record periods of low sea-level, strong evaporation and elevated salinity, thought to be associated with the onset of the Messinian Salinity Crisis. Overlying aragonitic limestones were precipitated in normal to slightly evaporative conditions, occasionally influenced by an influx of meteoric water. Evidence of bacterial involvement in carbonate formation is recorded in three dolomite-rich stromatolite beds in the lower portion of the section that contain low domes with irregular crinkly millimetre-scale lamination and small fenestrae. The dominant microfabrics are: (i) peloidal and clotted dolomicrite with c…