Search results for " ECOLOGIA"

Resistance to space simulating conditions and sporicidal treatments of spores from bacilli of extreme environments origins: implication for Astrobiol…

Microorganisms able to tolerate environmental extremes, or extremophiles, are ideal candidates to extend our knowledge on the limitations for terrestrial life, including sporicidal treatments, and on their ability to survive under conditions mimicking space environments. The spore resistance of bacilli isolated from extreme environments, cold (Antarctic soils) and hot (shallow hydrothermal vents of Eolian Islands, Italy), was evaluated towards environmental stressors (wet- and dry-heat, low and high pH values), sporicidal treatments and stresses simulating space-environments (UV-C and X-rays irradiations, desiccations by low pressure, exposition to oxidizing agents and low pressure plasma),…

Dinamica dell’ecosistema roccioso dell’AMP “Isola di Ustica” nell’ultimo cinquantennio attraverso la conoscenza dei veterani del mare.

2013

ROLE OF BEHAVIOUR IN MARINE ORGANISMS: POTENTIAL EFFECTS UNDER FUTURE OCEAN CONDITIONS.

2021

Over the last 250 years, the intensive burning of fossil fuels along with industrial processes and land uses (e.g. clearing forests and agriculture) has contributed to an increase in atmospheric CO2 from approximately 280 to 410 ppm, with a further increase (from 730 to 1020 ppm) projected by the end of this century. About 30% of the anthropogenic CO2 has been absorbed by the ocean, with a consequent decrease of the ocean’s surface pH causing a phenomenon better known as Ocean Acidification (OA). The average pH of the surface ocean has declined from 8.2 by 0.1 units since pre-industrial times as a result of CO2 emissions and a further reduction of 0.3–0.5 pH units is expected to occur by th…

Does mating group size negatively affect female investment in the simultaneous hermaphrodite Aplysia punctata

2015

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First assessment of the vermetid reefs along the coasts of Favignana Island (Southern Tyrrhenian Sea)

2015

Intertidal vermetid reefs, particularly vulnerable to environmental changes and human activities, are now experiencing high mortality in several areas of the Mediterranean Sea. Since the increase of knowledge on this habitat is important for conservation purposes, we provide a first baseline assessment of the vermetid reefs along the coasts of the Favignana Island (Marine Protected Area “Egadi Islands”). Preliminary results showed the presence of a true reef, similar to a fringing reef, displaying at least three local patterns, distinguishable for width (from 2.3 to 15.5 m), height of the outer and of the inner margin (from 5.6 to 18 cm and from 8.3 to 26 cm, respectively) and number, width…

Diversità microbica dei sedimenti marini dell’Area Marina Protetta di Capo Gallo-Isola delle Femmine (Palermo) in relazione alla pressione antropica.

2008

I batteri costituiscono una frazione significativa della biomassa totale in mare e la loro presenza risulta ancora più accentuata nei sedimenti. Le comunità microbiche marine giocano un ruolo chiave nei processi degradativi della sostanza organica sedimentaria e nella sua reintroduzione nelle reti trofiche. Tuttavia la piccola percentuale di batteri marini coltivabili (3-7%) pone un severo limite alla conoscenza della biodiversità microbica. Allo scopo di contribuire a definire i livelli di impatto antropico compatibili con la funzione di ciascuna zona dell’Area Marina Protetta è stata caratterizzata la comunità batterica totale indigena dei sedimenti. Lo studio è stato effettuato utilizzan…

Diversità della meiofauna in sistemi caratterizzati dalla presenza di macroalghe erette (EMA) e sistemi dominati da alghe incrostan ti e ricci (ECA

2014

Heart beat rate of invasive Brachidontes pharaonis with respect to the native Mytilaster minimus within the Mediterranean Sea at varying salinites

2011

Changes in heart beat rates (HBR) of Brachidontes pharaonis (an invasive Lessepsian species) and Mytilaster minimus (a native Mediterranean species) in response to changes in salinity values from brackish (20) to extreme hyper-saline (75) were investigated both in situ and in the laboratory. The two species displayed different responses to varying salinity, with clear differences in HBR observed between groups investigated at different salinities and between groups originating from different environments. The native species, adapted to narrow salinity changes as those observed in the superficial waters of the Mediterranean Sea, showed signs of stress at salinities slightly above 37 (in the …

Effect of feeding conditions on Brachidontes pharaonis (Mollusca, Bivalvia) respiration and growth rates

2010

Dynamic Energy Budget model parameter estimation for the bivalve Mytilus californianus: Application of the covariation method

2014

Dynamic Energy Budget (DEB) models serve as a powerful tool for describing the flow of energy through organisms from assimilation of food to utilization for maintenance, growth and reproduction. The DEB theory has been successfully applied to several bivalve species to compare bioenergetic and physiological strategies for the utilization of energy. In particular, mussels within the Mytilus edulis complex (M. edulis, M. galloprovincialis, and M. trossulus) have been the focus of many studies due to their economic and ecological importance, and their worldwide distribution. However, DEB parameter values have never been estimated for Mytilus californianus, a species that is an ecological domin…