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Cnr-Istituto di Scienze Marine

L’Istituto di Scienze Marine del Consiglio Nazionale delle Ricerche svolge attività di ricerca fondamentale e applicata in oceanografia fisica, chimica e biologica e in geologia marina.

L’obiettivo è contribuire allo studio dei processi oceanici e della variabilità climatica, allo sviluppo di sistemi/servizi per l’osservazione, la protezione e la gestione sostenibile dell’ambiente marino e delle coste.

                               L’Istituto di Scienze Marine del Consiglio Nazionale delle Ricerche (CNR-ISMAR) svolge attività di

Ricerca Fondamentale e Applicata

in oceanografia fisica, chimica e biologica e in geologia marina con l’obiettivo di contribuire sia allo studio dei processi oceanici e della variabilità climatica che allo sviluppo di sistemi/servizi per l’osservazione, la protezione e la gestione sostenibile dell’ambiente marino e delle coste

VENEZIA

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Dati presto disponibili

Venezia Acqua Alta

Venezia Acqua Alta

8-Arrow Down Scarica l'app
+23%

Aumento della temperatura acqua nel mese di Maggio

Piattaforma Oceanografica Acqua Alta
Tavolo Tecnico
Approfondimenti
Webcam

Eventi

Unraveling the Mesophotic Zone of the Mediterranean Sea

Mesophotic ecosystems are corals, algae, and sponges assemblages constituting complex threedimensionalstructures mainly found between 30 m and the bottom of the photic zone. From the early
2000s, the volume of scientific literature about benthic mesophotic ecosystems is strongly increased, together with the awareness of both their biological richness and related ecological importance. However, the Mediterranean Mesophotic Zone and the biological assemblages it hosts are still poorly studied with respect to the extra-Mediterranean areas. During this seminar, we will explore the available information regarding the Mediterranean Mesophotic Zone with a focus on its conceptual and spatial definition. Preliminary results on the biodiversity and the ecological functions it supports, and how environmental factors drive the distribution and the composition of Mediterranean mesophotic assemblages will be also presented.

Collegamento WEBEX:
cnronline.webex.com

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In allegato la locandina del Seminario

Prossimo appuntamento: Giovedi 11 Marzo 2021, “Geochimica di acque e sedimenti di un invaso artificiale”, Simone Toller, Università di Bologna
Il gruppo seminari CNR-ISMAR, Alessandra Conversi (Lerici), Filomena Loreto (Bologna), Gianluigi Liberti (Roma) e Camilla Palmiotto (Bologna).

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News

Mesocarnivore community structuring in the presence of Africa’s apex predator

Apex predator reintroductions have proliferated across southern Africa, yet their ecological effects and proposed umbrella benefits of associated management lack empirical evaluations. Despite a rich theory on top-down ecosystem regulation via mesopredator suppression, a knowledge gap exists relating to the influence of lions (Panthera leo) over Africa’s diverse mesocarnivore (less than 20 kg) communities. We investigate how geographical variation in mesocarnivore community richness and occupancy across South African reserves is associated with the presence of lions. An interesting duality emerged: lion reserves held more mesocarnivore-rich communities, yet mesocarnivore occupancy rates and evenness-weighted diversity were lower in the presence of lions. Human population density in the reserve surroundings had a similarly ubiquitous negative effect on mesocarnivore occupancy. The positive association between species richness and lion presence corroborated the umbrella species concept but translated into small differences in community size. Distributional contractions of mesocarnivore species within lion reserves, and potentially corresponding numerical reductions, suggest within-community mesopredator suppression by lions, probably as a result of lethal encounters and responses to a landscape of fear. Our findings offer empirical support for the theoretical understanding of processes underpinning carnivore community assembly and are of conservation relevance under current large-predator orientated management and conservation paradigms.

https://royalsocietypublishing.org/doi/abs/10.1098/rspb.2020.2379

The paper has been discussed by The New York Times:

https://www.nytimes.com/2021/03/13/science/lions-south-africa-wildlife-parks.html?s=08#click=https://t.co/O5STTSL0OZ

Seminari

Next seminar

Giovedì 8 maggio ore 14:30    –    ON LINE LINK

Gian Marco Palamara, CNR-ISMAR-Roma
“Integrated Modelling for Integrative Ecology”

ABSTRACT: Ecology is a discipline with flexible boundaries, where characterizing species interactions and ecosystem responses often requires accounting for the complexity, nonlinearity, and stochastic nature of biological and environmental processes.
In this talk, I will present different ecological case studies combining experimental and theoretical approaches to explore population and community dynamics under environmental stress and spatial heterogeneity. In the first part of the talk, we analyse long-term experiments on Daphnia galeata exposed to sublethal pesticide concentrations using a stochastic, age-structured population model. Bayesian inference reveals significant treatment effects — particularly for the insecticide Diazinon — on mortality and fertility, with clone-specific responses reflecting potential adaptation. The model also accounts for strong demographic stochasticity, supporting more reliable interpretation of ecotoxicological data. In a second case study, we develop stochastic models for multi-species systems, including food webs and metacommunities. Using continuous-time Markov processes, we revisit functional response theory, predator prey equations, and finally explore biodiversity dynamics in dynamic landscapes modelled as time-varying random geometric graphs with neutral dynamics. Among other things, our findings show that fluctuating connectivity can enhance both local and regional species richness, offering new theoretical insights into spatiotemporal drivers of biodiversity.
Together, these studies demonstrate how stochastic models can reveal hidden mechanisms in ecological systems — from controlled experiments to complex landscapes.

Gian Marco Palamara was born in Rome and trained as a physicist. For over a decade, he has worked internationally at the intersection of theoretical ecology and ecological modelling, collaborating closely with empiricists to develop robust theoretical frameworks for understanding the drivers of biological diversity. More recently, Gian Marco has been exploring integrative approaches to ecology that bridge disciplinary boundaries, drawing together insights from the mathematical, natural, and social sciences.

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