Roberto Danovaro

Stazione Zoologica Anton Dohrn | Stazione Zoologica

Global tourism growth is threatening environmental health of several destinations. While negative impacts of tourism on environmental quality are being increasingly documented, the effects of degrading environmental quality on tourists’ choices have been largely neglected. Here we investigated the case study of Egyptian Red Sea, one of the world's...

The high number of offshore platforms at the end of their productive phase offers the opportunity of their re-use and the development of effective management solutions, such as the possibility of utilizing them as ecological observatories for monitoring marine ecosystems and their biological resources. Here, through a multiparametric observatory de...

Acesta excavata is one of the largest and ecologically relevant bivalves along continental margins and is often associated with cold-water coral assemblages of the upper bathyal zone. Like other habitat-forming species, Acesta excavata contributes to increasing the secondary substrates and provides opportunities for the colonization and feeding of...

Coastal protection from erosion is an important ecosystem service provided by marine vegetation. Seaweeds and seagrasses can attenuate wave action in coastal areas and increase sediment retention. Here we investigated for the first time the effects of erect Cystoseira sensu lato forests in attenuating the wave energy in two Mediterranean shallow ar...

This study presents an inventory of free-living marine nematodes from the deep waters of the southeastern part of the Levantine Basin. The meiofauna of this area, particularly the free-living marine nematodes, have been poorly investigated; hence, the present study has regional zoo-geographic importance. To fill this knowledge gap, nematodes were c...

The microbiome plays a key role in the health of all metazoans. Whether and how the microbiome favors the adaptation processes of organisms to extreme conditions, such as those of Antarctica, which are incompatible with most metazoans, is still unknown. We investigated the microbiome of three endemic and widespread species of Antarctic polychaetes:...

Despite their small individual size, marine prokaryotic and eukaryotic microbes can form large 3D structures and complex habitats. These habitats contribute to seafloor heterogeneity, facilitating colonization by animals and protists. They also provide food and refuge for a variety of species and promote novel ecological interactions. Here we illus...

Floating Offshore Wind Farms (FOWFs) are the most promising renewable energy resource. Floating turbines are installed at progressively increasing water depths, interacting with offshore and deep-sea ecosystems. Thus, specific criteria to enable a sound and accurate Environmental Impact Assessment (EIA) are required. The still limited understanding...

Biodiversity patterns are fundamental in our understanding of the distribution of life, ecosystem function, and conservation. In this concept analysis, A survey of the existing knowledge on marine biodiversity patterns and drivers across latitudes, longitudes, and depths indicates that none of the postulated patterns represent a rule. The paradigm...

Life on our planet likely evolved in the ocean, and thus exo-oceans are key habitats to search for extraterrestrial life. We conducted a data-driven bibliographic survey on the astrobiology literature to identify emerging research trends with marine science for future synergies in the exploration for extraterrestrial life in exo-oceans. Based on se...

Cladocora caespitosa is the only reef-building zooxanthellate coral in the Mediterranean Sea. It forms beds of colonies, sporadically aggregating in extensive reef-like structures. The carbonate deposition of C. caespitosa enhances habitat complexity, supports biodiversity, and contributes to carbon sequestration. This species has been increasingly...

Although the negative effects of inorganic UV filters have been documented on several marine organisms,sunscreen products containing such filters are available in the market and proposed as eco-friendly substitutes forharmful, and already banned, organic UV filters (e.g. octinoxate and oxybenzone). In the present study, weinvestigated the effects o...

Macroalgal forests play a crucial ecological role, providing important ecosystem services, but are also among the most vulnerable marine habitats. In the Mediterranean Sea, the forests of Cystoseira sensu lato ( s.l. ) are undergoing a drastic decline due to the presence of multiple stressors, and among these species, Gongolaria barbata is one of t...

The rapid advancement of digital technologies such as digital twins, AI and machine learning has opened up promising avenues for ecological actions, including conservation, research and restoration. These technologies offer improved monitoring capabilities that can enhance our understanding of ecological processes and biodiversity. The EU-funded DI...

Fishery is one of the most impacting human activities and is responsible for habitat loss in marine systems. While the effects of large‐scale fisheries have been largely investigated, impacts of small‐scale fisheries (SSF) on seafloor integrity are more often assumed than quantitatively investigated. We carried out a literature review at global sca...

Hadal trenches host abundant and diversified benthic prokaryotic assemblages, but information on benthic fungi is still extremely limited. We investigated the fungal abundance and diversity in the Challenger Deep (at ca. 11,000 m depth) and the slope of the Mariana Trench in comparison with three sites of the adjacent abyssal plain. Our results ind...

Macroalgal forests, such as Cystoseira sensu lato , comprise crucially important habitats in the Mediterranean Sea, providing protection and structural complexity, enhancing productivity, food, shelter and spawning grounds in coastal marine ecosystems. However, due to increasing direct and indirect anthropogenic impacts, these habitats are rapidly...

Nematodes represent >3/5 of the abundance of the world's metazoans and usually account for nearly 90% of the total benthic fauna, playing a key ecological role in the benthic ecosystem functioning on a global scale. These small metazoans include a relevant number of microscopic predators and, in turn, are the most abundant preys of macro-megafauna...

Deep-sea active hydrothermal vents are globally diverse, vulnerable, rare, remote, and isolated habitats, yet they face increasing threats from human activities, including deep-sea mining. To address the conservation challenges surrounding these habitats, we present a global assessment of the conservation status of deep-sea active vents. Our findin...

The worldwide decline of macroalgal forests is raising major concerns for the potentially negative consequences on biodiversity and ecosystem functions, pushing for the definition of specific conservation and restoration measures. Protecting and restoring these habitats requires detailed information on their distribution, ecological status, and dri...

Active marine restoration is strongly encouraged to prevent the loss of the valuable habitats formed by Cystoseira sensu lato species, since they enhance biodiversity and preserve ecosystem functions and services. Current restoration interventions are mainly based on recruitment enhancement methods by deploying bags with fertile receptacles in situ...

Current knowledge of the microbial diversity of shallow-water hydrothermal vents is still limited. Recent evidence suggests that these peculiar and heterogeneous systems might host highly diversified microbial assemblages with novel or poorly characterized lineages. In the present work, we used 16S rRNA gene metabarcoding to provide novel insights...

Introduction Active restoration is the strategy needed to trigger or accelerate the recovery of degraded marine habitats, which provide the goods and services essential for preserving biodiversity and human wellbeing. Ecosystem engineers are generally the target species in the ecological restoration of marine ecosystems, and large-sized brown macro...

Microorganisms interact with all biological components in a variety of ways. They contribute to increase the efficiency of marine food webs and facilitate the adaptation of multicellular organisms to climate change and other human-induced impacts. Increasing evidence suggests that microbiomes are essential for the health of marine species, for main...

BIOPROSPECTING OF MARINE FUNGI AND FUNGI-BACTERIA INTERACTIONS FOR BIOREMEDIATION OF CONTAMINATED MARINE SEDIMENTS

Macroalgal forests characterised by species of the genus Cystoseira sensu lato form important shallow coastal rocky habitats in the Mediterranean Sea. These forests support a high biodiversity and provide important ecosystem services and societal benefits. Currently these habitats are often in a poor condition in many areas, due to loss and degrada...

Introduction Passive and active restoration approaches have been often considered as different alternatives to achieve the ecological restoration of a degraded site. This false dichotomy has been overcome in terrestrial ecosystems, for which a range of restoration approaches have often been applied within the same restoration project, creating a co...

The term marine biodiversity encompasses a broad range of subjects, spanning from descriptions of single species, or taxa, to habitats and ecosystems, and indeed the global ocean. The Convention on Biological Diversity defines biodiversity (or biological diversity) as “the variability among living organisms from all sources, including inter alia, t...

The Mediterranean Sea is one of the most exploited regions of the world’s oceans. Here industrial activities have determined either acute or long-term impacts on coastal marine ecosystems. In this study, we investigated macrofauna distribution and diversity, and food-web functioning in a coastal area of the Mediterranean Sea facing an industrial ch...

Due to their late maturation, extreme longevity, low fecundity and slow growth rates, deep-sea Chondrichthyes are extremely vulnerable to human impacts. Moreover, assessing the impact of deep-sea fisheries is difficult, as many species (including sharks) are part of the bycatch and are often discarded at sea, and/or landed under generic commercial-...

Invertebrate animals living at the seafloor make up a prominent component of life globally, spanning 10 orders of magnitude in body size over 71% of Earth's surface. However, integrating information across sizes and sampling methodologies has limited our understanding of the influence of natural variation, climate change and human activity. Here, w...

Background Hydrothermal vents, cold seeps, pockmarks and seamounts are widely distributed on the ocean floor. Over the last fifty years, the knowledge about these volcanic-associated marine ecosystems has notably increased, yet available information is still limited, scattered, and unsuitable to support decision-making processes for the conservatio...

Humans have used, and had effects on, marine ecosystems throughout history. As the human population and its economic activities increase, these effects intensify. Yet, our awareness and understanding of the long‐term, pervasive effects of anthropogenic disturbances on the seafloor, and the resident meiofauna, is far from complete. This chapter summ...

Ocean manipulation to mitigate climate change may harm deep-sea ecosystems.

The process of site selection and spatial planning has received scarce attention in the scientific literature dealing with marine restoration, suggesting the need to better address how spatial planning tools could guide restoration interventions. In this study, for the first time, the consequences of adopting different restoration targets and crite...

Nematodes represent the most abundant benthic metazoan of all seas and oceans, and their relative importance increases with increasing water depth. Understanding the biodiversity patterns of this dominant phylum could be a critical step towards our comprehension of the evolutionary patterns across the largest biome of the biosphere. For instance, i...

The continental margin off the Mediterranean coast of Israel has experienced in recent decades rapid increase in anthropogenic pressures, from global change to local offshore gas production. Yet, our ability to comprehend and evaluate impacts and possible interactions among shelf and upper slope stressors is severely hampered by the lack of data. O...

Although the ecological importance and impact of non-indigenous species is increasingly recognised and documented in shallow water ecosystems, their presence beyond the shelf has scarcely been documented. A survey of the upper slope biota of the Mediterranean coast of Israel revealed the presence at 200-m depth of individuals of three Erythraean sp...

Described in 2012, « coralligenous atolls » are rings (diameter=25 m) composed of a coralligenous central core and a crown made of rhodoliths. Thousands exist in a unique place: a 4-km² area at -115 m in the Natural Marine Park of Cape Corse and Agriate (French Mediterranean) and outside the french exclusive economic zone. In summer 2021, the Gombe...

There is now unequivocal evidence that sunscreen can severely affect marine ecosystems. However, so far, most studies have focused on the impact of single sunscreen ingredients rather than on the whole sunscreen products, which are released into the marine environment. In the present work, we investigated the ecological impact of six formulations,...

Cold-water coral (CWC) systems are hotspots of biodiversity that need protection from the increasing human impacts and global climate change. The restoration of degraded cold-water coral reefs may be conducted through transplantation of nubbins. To do so, we need to set up the optimal conditions for CWCs livelihood in an aquarium setting. Here we i...

Supplementary materials of the article "The rise and fall of an alien: why the successful colonizer Littorina saxatilis failed to invade the Mediterranean Sea"

Understanding what determines range expansion or extinction is crucial to predict the success of biological invaders. We tackled this long-standing question from an unparalleled perspective using the failed expansions in Littorina saxatilis and investigated its present and past habitat suitability in Europe through Ecological Niche Modelling. This...

Growing water demands and decreasing water supplies are exacerbating water scarcity, which is one of the challenges for sustainable development. Desalination is expanding worldwide, particularly in the Mediterranean region and plants discharge at sea large amounts of hypersaline brines, which might have consequences on marine life. We report the re...

The Northern Adriatic Sea is historically subjected to intensive bottom trawling and hydraulic dredging for clam harvesting, which are known to have deleterious effects on benthic habitats. In order to gather information on the destructive impact of hydraulic dredging, we investigated the abundance and assemblage composition of soft-bottom macrofau...

The Aeolian Islands (Mediterranean Sea) host a unique hydrothermal system called the “Smoking Land” due to the presence of over 200 volcanic CO2-vents, resulting in water acidification phenomena and the creation of an acidified benthic environment. Here, we report the results of a study conducted at three sites located at ca. 16, 40, and 80 m of de...

Recent advances in robotic design, autonomy and sensor integration create solutions for the exploration of deep-sea environments, transferable to the oceans of icy moons. Marine platforms do not yet have the mission autonomy capacity of their space counterparts (e.g., the state of the art Mars Perseverance rover mission), although different levels...

Global warming is causing the increase in intensity and frequency of heatwaves, which are often associated with mass mortality events of marine organisms from shallow and mesophotic rocky habitats, including gorgonians and other sessile organisms. We investigated the microbiome responses of the gorgonians Paramuricea clavata, Eunicella cavolini, an...

Industrial seabed mining is expected to cause significant impacts on marine ecosystems, including physical disturbance and the generation of plumes of toxin-laden water. Portmán Bay (NW Mediterranean Sea), where an estimated amount of 60 Mt of mine tailings from sulphide ores were dumped from 1957 to 1990, is one of the most metal-polluted marine a...

Deep-sea ecosystems of the Iberian margin have been widely impacted over the past decades, but the limited knowledge on their biodiversity and functioning limits our ability to contribute to their conservation. So far, in the Gulf of Cadiz, research has mostly been focused on megabenthic assemblages associated to mud volcanoes. However, several oth...

Increasing interest in the acquisition of biotic and abiotic resources from within the deep sea (e.g. fisheries, oil-gas extraction, and mining) urgently imposes the development of novel monitoring technologies, beyond the traditional vessel-assisted, time-consuming, high-cost sampling surveys. The implementation of permanent networks of seabed and...

Fungi are a ubiquitous component of marine systems, but their quantitative relevance, biodiversity and ecological role in benthic deep-sea ecosystems remain largely unexplored. In this study, we investigated fungal abundance, diversity and assemblage composition in two benthic deep-sea sites of the Ross Sea (Southern Ocean, Antarctica), characteriz...

We report lead (Pb) analyses in juvenile (n = 37; mean length = 24.7 ± 2.3 cm) and adult (n = 16; mean length = 52.3 ± 9.3 cm) Centroscymnus coelolepis Mediterranean deep-sea sharks that are compared to Pb content in bathy-demersal, pelagic and shallow coastal sharks. Median Pb concentrations of C. coelolepis muscle (0.009–0.056 wet ppm) and liver...

Understanding what determines range expansion or extinction is crucial to predict the success of biological invaders and effectively deal with biodiversity changes. We tackled this long-standing question from an unparalleled perspective using the failed expansions in Littorina saxatilis and investigating its present and past habitat suitability in...

Environmental DNA (eDNA) metabarcoding (parallel sequencing of DNA/RNA for identification of whole communities within a targeted group) is revolutionizing the field of aquatic biomonitoring. To date, most metabarcoding studies aiming to assess the ecological status of aquatic ecosystems have focused on water eDNA and macroinvertebrate bulk samples....

Deep-sea ecosystems are facing degradation which could have severe consequences for biodiversity and the livelihoods of coastal populations. Ecosystem restoration as a natural based solution has been regarded as a useful means to recover ecosystems. The study provides a social cost-benefit analysis for a proposed project to restore the Dohrn Canyon...

Restoration is considered an effective strategy to accelerate the recovery of biological communities at local scale. However, the effects of restoration actions in the marine ecosystems are still unpredictable. We performed a global analysis of published literature to identify the factors increasing the probability of restoration success in coastal...

Algal habitat-forming forests composed of fucalean brown seaweeds (Cystoseira, Ericaria, and Gongolaria) have severely declined along the Mediterranean coasts, endangering the maintenance of essential ecosystem services. Numerous factors determine the loss of these assemblages and operate at different spatial scales, which must be identified to pla...

The cumulative impact of microplastic and organic enrichment is still largely unknown. Here, we investigated the microplastic contamination, the organic enrichment and their effects on meiofaunal distribution and diversity in two islands of the Maldivian archipelago: one more pristine, and another strongly anthropized. Field studies were coupled wi...

Abyssal plains cover more than half of Earth’s surface, and the main food source in these ecosystems is phytodetritus, mainly originating from primary producers in the euphotic zone of the ocean. Global climate change is influencing phytoplankton abundance, productivity and distributions. Increasing importance of picoplankton over diatom as primary...

Implementing European marine policies in the deep waters of the North Atlantic

Fucalean brown algae of the genera Carpodesmia, Cystoseira and Treptacantha are a typical feature of shallow subtidal Mediterranean habitats, where these habitat-forming seaweeds produce canopies playing a key role in the functioning of coastal ecosystems. In recent decades these communities have undergone a major decline in cover and biomass; this...

Benthic habitats of the deep Mediterranean Sea and the biodiversity they host are increasingly jeopardized by increasing human pressures, both direct and indirect, which encompass fisheries, chemical and acoustic pollution, littering, oil and gas exploration and production and marine infrastructures (i.e., cable and pipeline laying), and bioprospec...