Search results for "Seagra"
showing 10 items of 101 documents
Sources and transfer of organic matter in food webs of a Mediterranean coastal environment: Evidence for spatial variability
2006
Abstract The spatial variability in the food web structure of a Mediterranean semi-enclosed coastal environment (Stagnone di Marsala, Italy) was investigated using stable carbon and nitrogen isotopes. Organic matter sources and consumers were sampled in two locations with different environmental features (e.g. hydrodynamic regime, open-sea influence, vegetal coverage). Overall more 13 C-enriched and 15 N-depleted values were found in the central location than in the southern for organic matter sources and consumers. Pelagic consumers (zooplankton and juveniles of transient fish) showed slight spatial differences and in both locations seemed to depend on phytoplankton as the ultimate energy …
Studio della comunità associata allo strato fogliare di Posidonia oceanica in sorgenti sottomarine superficiali di CO2
2011
Inter-habitat connectivity in a tropical ecosystem (Gazi Bay, Kenya) as revealed by ichthyofauna
2010
Composition and trophic structure of motile fauna populations in macrophytes of a natural CO2 vent system
2014
Serie storiche della composizione isotopica (δ13C e δ15N) di Posidonia oceanica L. (Delile) in un’area interessata da emissioni idrotermali
2008
Posidonia oceanica loss in a Mediterranean semi-enclosed coastal system: response of polychaete assemblage
2012
Response of seagrasses and marine biofilms to natural acidification at CO2 vents
Nel corso degli ultimi 200 anni, circa il 30% delle emissioni antropogeniche di CO2 nell’atmosfera sono state assorbite dagli oceani, provocando un abbassamento medio dei livelli di pH oceanici pari a circa 0.1 unità. Questo fenomeno, noto come acidificazione degli oceani, sta determinando conseguenze negative sugli ecosistemi marini e sul loro funzionamento. Le attuali proiezioni climatiche suggeriscono che, in futuro, i cambiamenti climatici continueranno e si intensificheranno se non verranno adottate efficaci misure di mitigazione. Riuscire a valutare la risposta degli ecosistemi marini ai cambiamenti climatici costituisce una vera sfida per la ricerca scientifica, non solo per la diffi…
Dinamica del detrito fogliare fanerogamico lungo un gradiente di confinamento in un’area costiera a caratteristiche lagunari
2011
Studio della dinamica di decomposizione del detrito fogliare di Posidonia oceanica lungo un gradiente di confinamento in un’area siciliana a caratter…
2012
Searching for the competitive ability of the alien seagrass Halophila stipulacea with the autochthonous species Cymodocea nodosa
2023
The tropical seagrass Halophila stipulacea (Forsskål) Ascherson, 1867 entered in the Mediterranean Sea through the Suez Canal more than 100 years ago. In coastal-marine ecosystems the spatial niche of H. stipulacea is often overlapped with that of native Mediterranean Sea seagrasses and therefore it might out-compete them. Aiming to better understand its invasiveness potential, we monitored a Southern Mediterranean shallow coastal-marine water habitat from August 2010 to August 2011, where H. stipulacea co-occurred with the native seagrass Cymodocea nodosa (Ucria) Ascherson, 1870. Besides, the year-round dynamics of H. stipulacea was also monitored in four periods. To test the hypothesis th…