Simona Rossi results 33
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Symbiotic partnerships have opened new ecological niches and contributed to the remarkable diversification of insects. The leafhopper Scaphoideus titanus , a phloem‐feeding insect known to be the primary vector of Flavescence dorée phytoplasma, harbours two primary endosymbionts: the bacterium ‘ Candidatus Karelsulcia muelleri’ and a yeast‐like symbiont (YLS). While most studies on insect‐associated microorganisms have focused...
Fishing activities alter food web diversity and functioning. Trophic level (TL) has been used as an indicator to assess such impacts on populations and assemblages. We reviewed the scientific literature that examined the relationship between fishing and the trophic aspects of fish species and communities, by focussing on TL. We narrowed the research to the Mediterranean Sea, where fishing is an important economic income for so...
RNA interference (RNAi) regulates gene expression in eukaryotes, and it is an emerging tool in crop protection by exogenous applications of double-stranded RNAs (dsRNAs) to silence the expression of essential pest genes. Nevertheless, delivery of dsRNAs to sap-sucking insects is a major challenge for RNAi applications. The present work aimed at verifying whether in leafhopper species, RNAi can be triggered by plant-mediated de...
In the past twenty years, satellite gravimetry missions have successfully provided data for the determination of the Earth static gravity field (GOCE) and its temporal variations (GRACE and GRACE-FO). In particular, the possibility to study the evolution in time of Earth masses allows us to monitor global parameters underlying climate changes, water resources, flooding, melting of ice masses and the corresponding global sea le...
The Ross Sea, Antarctica, supports large populations of Emperor Penguin ( Aptenodytes forsteri ) and Adélie Penguin ( Pygoscelis adeliae ), two key meso-predators that occupy high trophic levels. Despite these species are largely studied, little is known about their diet outside the breeding period. In the present study, we investigated the intra-annual diet of Adélie and Emperor Penguins belonging to five colonies in the Ross...
A novel approach to quantifying trophic interaction strengths and impact of invasive species in food websNARA Subscribed
Measuring ecological and economic impacts of invasive species is necessary for managing invaded food webs. Based on abundance, biomass and diet data of autochthonous and allochthonous fish species, we proposed a novel approach to quantifying trophic interaction strengths in terms of number of individuals and biomass that each species subtract to the others in the food web. This allowed to estimate the economic loss associated...
Determining food web architecture and its seasonal cycles is a precondition for making predictions about Antarctic marine biodiversity under varying climate change scenarios. However, few scientific data concerning Antarctic food web structure, the species playing key roles in web stability and the community responses to changes in sea-ice dynamics are available. Based on C and N stable isotope analysis, we describe Antarctic...