Search results for "ISOTOPE"
showing 10 items of 2232 documents
Spatial variations in habitat use and food habits of juvenile and adult fishes in a mangal ecosystem (Gazi Bay, Kenya)
2009
Exploitation of food sources by ichthyofauna in the Acquatina coastal system (Apulia, Italy)
2010
Using web-based information systems and stable isotopes analysis to investigate the trophic structure of a fish assemblage in a Mediterranean lagoon
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 Sources for Benthic Grazers in Trophic Networks of Macrophyte Habitats in a Transitional Baltic Ecosystem
2022
In this study, we provide insights into that characteristics of two sites representing different conditions of productivity and salinity impact on trophic network structures of macrophyte habitats and diet of benthic grazers at the active vegetation period in the Curonian Lagoon (southeastern Baltic Sea). Regarding the epiphytic growth, macrophytes were more overgrown in the relatively less productive (northern) site with a muddy bottom and more frequent marine water inflow than in the (southern) site with higher productivity and freshwater sandy habitat. Stable isotope analysis revealed that organisms’ samples from the northern site were more enriched with the heavier carbon isotopes, but …
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
Habitat effect on distribution and feeding of Ophidiaster ophidianus (Lmk.) (Asteroidea)
2016
The purple starfish Ophidiaster ophidianus is an Atlanto-Mediterranean starfish protected under the EU’s Habitats Directive. Despite the wide distribution and the current range expansion of this warm affinity species in the northern Mediterranean areas, nothing is known about its diet. Using field observations and carbon (δ13C) and nitrogen (δ15N) stable isotopes, we explored possible changes in density and diet of O. ophidianus in relation to two different Mediterranean habitats: the coralline barren and the macro algae forest. Data were collected at the Marine Protected Area of Ustica Island (Southern Tyrrhenian Sea) from June to September 2009. Starfish density was not affected by the ha…
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…