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

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Dati presto disponibili

Investigating river-sea system sediment connectivity: from Source to Sea

On a global scale, the flux of particles from rivers to the sea is estimated at 20 billion tonnes of sediments per year, with huge implications both from a geomorphological and ecological point of view. Indeed, though a natural component of all water bodies, the sediment itself is often considered a physical and chemical pollutant of water bodies. However, even if riverine transport is the primary direct impact of human activities on coastal environments, coastal management plans often lack systematic processes to assess land-based impacts. In such a context, the concept of the River-Sea continuum, which entails the assessment of sediment connectivity of the river basins and their deltaic systems, plays a fundamental role. Collecting sufficient data to quantitatively determine system connectivity is, however, extremely time and resource expensive. Satellite Earth Observation (EO) systems provide a powerful tool to define a holistic approach for efficient integrated coastal management plans. During this seminar, an overview of the main approaches employed for the assessment of River-Sea system sediment connectivity and the potential of the EO systems in this context will be presented.

Collegamento WEBEX:
cnronline.webex.com

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In allegato la locandina del Seminario
Il gruppo seminari CNR-ISMAR, Alessandra Conversi (Lerici), Filomena Loreto (Bologna), Gianluigi Liberti (Roma) e Camilla Palmiotto (Bologna).

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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

Next seminar

Giovedì 19 giugno  ore 14:30    –    ON LINE LINK
Dr. Fabrice Arhuin (CNRS, IRD, Ifremer, Laboratoire d’Océanographie Physique et Spatiale)
Sizing the largest ocean waves using the SWOT mission”  
Flyer

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