Lorenzo Bramanti

Lorenzo Bramanti
French National Centre for Scientific Research | CNRS · LECOB (UMR8222) - Observatoire Océanologique Banyuls sur mer

PhD

About

124
Publications
42,995
Reads
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3,244
Citations
Citations since 2017
50 Research Items
1929 Citations
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20172018201920202021202220230100200300
20172018201920202021202220230100200300
Additional affiliations
January 2016 - July 2016
French National Centre for Scientific Research
Position
  • Researcher
May 2015 - December 2015
California State University, Northridge
Position
  • PostDoc Position
Description
  • Population dynamics of gorgonians in the caribbean
May 2013 - May 2015
Sorbonne Université
Position
  • Post Doc Researcher
Description
  • Connectivity and metapopulation models for Mediterranean octocorals
Education
September 1992 - February 2000
Università di Pisa
Field of study

Publications

Publications (124)
Article
Full-text available
Abstract Using empirical analyses of the effects of global climate change (GCC) and ocean acidification (OA) on the survival and calcification of early life stages of Pocillopora damicornis, we employed a demographic approach to forecast the consequences of GCC and OA on the population dynamics of this coral. We constructed a size-based demographic...
Article
Full-text available
Theory suggests that density-associated processes can modulate community resilience following declines in population size. Here, we demonstrate densityassociated processes in two scleractinian populations on the outer reef of Moorea, French Polynesia, that are rapidly increasing in size following the effects of two catastrophic disturbances. Betwee...
Article
Full-text available
The Mediterranean red coral, Corallium rubrum, is one of the most precious corals worldwide. Below 50 m depth, C. rubrum populations are generally characterised by large and sparse colonies, whereas shallow populations (above 50 m depth) show high densities of small colonies. We show here instead that populations dwelling between 80 and 170 m depth...
Article
Full-text available
Density dependence (DD) controls community recovery following widespread mortality, yet this principle rarely has been applied to coral assemblages. The reefs of Mo'orea, French Polynesia, provide the opportunity to study DD of coral population growth, because coral assemblages in this location responded to declines in abundance with high recruitme...
Article
Full-text available
Corals are ecosystem engineers whose tree-like structures give three-dimensional complexity to the habitat. Their population dynamics are affected by recruitment and juvenile survival. Therefore, several defense strategies, such as the formation of hard skeletons and/or spicules, have evolved to protect these vulnerable stages. The family Coralliid...
Article
The colony formation in Mediterranean coral Corallium rubrum is initiated by a larva that metamorphoses into the first polyp of the emerging colony approximately two weeks after settlement. The primary polyp then sets up a slow process that eventually, at least after several years, gives rise to a tree-like rigid colony structure on which other pol...
Article
Full-text available
Artificial reefs (ARs) have been used to support fishing activities. Sessile invertebrates are essential components of trophic networks within ARs, supporting fish productivity. However, colonization by sessile invertebrates is possible only after effective larval dispersal from source populations, usually in natural habitat. While most studies foc...
Article
Full-text available
Corallium rubrum and Eunicella cavolini are two octocorals, reported as co-occurring species in the deep rocky habitats of the Mediterranean Sea with a high hydrodynamic and moderate eutrophication. Their spatial distribution and demography in the deep sea are mainly affected by temperature and direct and indirect anthropogenic activities; however,...
Preprint
Full-text available
Projecting the combined effect of management options and the evolving climate is necessary to inform shared sustainable futures for marine activities and biodiversity. However, engaging multi-sectoral stakeholders in biodiversity-use scenarios analysis remains a challenge. Using a marine social-ecological case study, we coupled co-designed visionin...
Article
Full-text available
The survival, behavior and competence period of lecithotrophic larvae depends not only on the energy allocation transferred by maternal colonies but also on the amount of energy consumed to sustain embryonic, larval, and post-larval development. The objective of the present work is to understand the effect of energy consumption on the performance o...
Preprint
Full-text available
A bstract Artificial reefs (ARs) have been used to support fishing activities. Sessile invertebrates are essential components of trophic networks within ARs, supporting fish productivity. However, colonization by sessile invertebrates is possible only after effective larval dispersal from source populations, usually in natural habitat. While most s...
Article
Seafloor macrolitter is ubiquitous in world's oceans; still, huge knowledge gaps exist on its interactions with benthic biota. We report here the colonization of plastic substrates by the Mediterranean red coral Corallium rubrum (L. 1758), occurring both in controlled conditions and in the wild at ca. 85 m depth in the Western Mediterranean Sea. Ju...
Article
Full-text available
The phenomenon of chimerism in the Mediterranean red coral (Corallium rubrum) is reported and quantified in semi-natural conditions. 1688 larvae were maintained in closed circuit in presence of a suitable settlement surface (marble tiles). Post settlement survival and chimera formation were monitored for 1 year. According to our observation, when p...
Chapter
The science of demography was developed for the study of human populations , but the theoretical framework and analytical techniques can be easily applied to animal populations, giving powerful instruments for conservation and management. Demography is then a paradigmatic example of the advantages of interdisciplinary approaches which allow transfe...
Article
Full-text available
Cnidarians are known to undergo reverse development as a survival mechanism against adverse environmental conditions. Polyp bail-out consists in the polyps' detachment from the mother colony due to stressful conditions, followed by a complete tissue and cells rearrangement and in some cases in a regression into a simple, ciliated form. Here we desc...
Article
Coral reefs throughout the tropics have experienced large declines in the abundance of scleractinian corals over the last few decades, and some reefs are becoming functionally dominated by animal taxa other than scleractinians. This phenomenon is striking on many shallow reefs in the tropical western Atlantic, where arborescent octocorals now are n...
Article
Submarine canyons are peculiar habitats of the continental margin due to their hydrodynamic and geomorphological features. Coral assemblages forming marine animal forests (MAFs) are one of the key benthic components dwelling in these habitats, where they enhance the substrate's heterogeneity and provide shelter, feeding and spawning habitats for a...
Article
Full-text available
Knowledge about migration potential is key to forecasting species distributions in changing environments. For many marine benthic invertebrates, migration happens during reproduction because of larval dispersal. The present study aims to test whether larval size can be used as a surrogate for migration potential arising from larval longevity, compe...
Article
Full-text available
In this paper, we investigated the age distribution and dynamics of polyps in the slow-growing and long-lived gorgonian Corallium rubrum (the Mediterranean red coral), applying an a posteriori demographic approach by considering each colony as a population of polyps. In the Mediterranean red coral, new polyps emerge from the coenenchyme in differen...
Article
Sessile marine species such as Anthozoans act as ecosystem engineers due to their three-dimensional structure. Gorgonians, in particular, can form dense underwater forests that give shelter to other species increasing local biodiversity. In the last decades, several Mediterranean gorgonian populations have been affected by natural and anthropogenic...
Article
Full-text available
After centuries of human-mediated disturbances, Caribbean reef communities are vastly different from those described in the 1950s. Many are functionally dominated by macroalgae, but this community state represents only one of several possibilities into which present-day coral reefs can transition. Octocorals have always been abundant on Caribbean r...
Chapter
While it is known that octocorals and trees share many similarities in form and function due to their sessile modular nature, and octocoral communities create dense canopies termed “animal forests,” there has been little quantification of whether these similarities derive from the same ecological and evolutionary processes. Nowadays, octocoral fore...
Article
Full-text available
In recent decades, many Caribbean reefs have experienced large declines in abundance of scleractinian corals, and blooms of fleshy macroalgae have often accompanied these trends. In 2010 a new macroalgal threat emerged in Lac Bay, Bonaire, where peyssonnelid algal crusts (PAC) rapidly spread in shallow water and overgrew corals and sponges. Similar...
Chapter
Full-text available
Corallium rubrum is an octocoral species, endemic to Mediterranean and neighbouring marine habitats and plays a foundational role in these ecosystems. Due to extensive harvesting and increase in water temperature, this long-lived and slow-growing species is now endangered, and hence it is in the focus of conservation efforts. However, little is kno...
Chapter
The science of demography was developed for the study of human populations, but the theoretical framework and analytical techniques can be easily applied to animal populations, giving powerful instruments for conservation and management. Demography is then a paradigmatic example of the advantages of interdisciplinary approaches which allow transfer...
Article
Full-text available
Some of the best-known disturbances affecting coral reefs are storms, yet their impacts on light are poorly known. Here, we describe the underwater light on a reef off St. John, US Virgin Islands (18°18′37.04N, 63°43′23.17W), during two hurricanes and multiple tropical waves that occurred between 17 August 2017 and 30 November 2017. Photosynthetica...
Conference Paper
Full-text available
Healthy coralligenous habitats may host dense populations of gorgonians, like Paramuricea clavata and Eunicella cavolini that build marine animal forests. According to recent studies, these forests appeared able to increase the resilience of coralligenous habitats and to enhance the structural complexity and bioconstruction processes. They are also...
Article
Full-text available
An important goal of coral reef science is to understand the roles played by environmental conditions in determining benthic community structure. Pursuit of this goal typically involves testing for associations between community structure and environmental conditions, and in recent years, attention has focused on temperature and seawater pH. Such a...
Article
Full-text available
Over the last decades, the global climate change caused increase in seawater temperature, which have shown to be detrimental for Mediterranean red coral populations (Corallium rubrum). Recent researches on C. rubrum described how in shallow water habitats (i.e., up to 50 m depth), thermo-tolerance is influenced by local temperature fluctuations. In...
Article
Full-text available
• Climate‐induced threats are increasingly affecting marine populations worldwide. In the last few decades, several gorgonian species have been affected by mass mortality events in the north‐west Mediterranean, putatively linked to local sea temperature increases during heatwaves. For many benthic sessile species, recovery after disturbances depend...
Article
In a landscape of fear, humans are altering key behaviours of wild-living animals, including those related to foraging, reproduction, and survival. When exposed to potentially lethal human actions, such as hunting or fishing, fish, and wildlife are expected to behaviourally respond by becoming shyer and learning when to be cautious. Using a rich da...
Article
Full-text available
Understanding the patterns of connectivity is required by the Strategic Plan for Biodiversity 2011–2020 and will be used to guide the extension of marine protection measures. Despite the increasing accuracy of ocean circulation modelling, the capacity to model the population connectivity of sessile benthic species with dispersal larval stages can b...
Article
Full-text available
The occurrence of modified tentacles (i.e. thread-like tentacles) in the Mediterranean octocorals Paramuricea clavata and Corallium rubrum is reported. Colonies of four species of Mediterranean gorgonians were maintained in aquarium conditions for more than 5 months. The development of thread-like tentacles has been observed only in two of the four...
Article
Full-text available
Octocorals have increased in abundance on a number of Caribbean reefs, but this trend has largely been reported with functional group or genus resolution. A species-level analysis of octocoral communities in St. John, US Virgin Islands was conducted to better understand how this taxon will respond to changing conditions based on their synecology at...
Preprint
Full-text available
In a landscape of fear, humans are altering key behaviors expressed by wild-living animals, including those related to foraging, reproduction and survival. When exposed to potentially lethal human actions, such as hunting or fishing, fish and wildlife is expected to behaviorally respond by becoming more timid, but proving such responses underwater...
Chapter
Full-text available
Gorgonian corals may form dense canopies, resembling miniature forests. Similarly to terrestrial forests, gorgonian canopies can increase local complexity and biodiversity. The demographic study of gorgonian populations can supply valuable tools to our understanding of their complex, long-lasting life cycles. In this chapter we report on the demogr...
Chapter
Full-text available
The knowledge on the growth patterns of organisms constructing complex three-dimensional structures can help in understanding their role as engineering species. Growth and form of several sessile organisms are characterized by different properties; one of those is modularity. Trees in terrestrial habitats and corals in marine environments are sessi...
Chapter
In the marine benthos, megabenthic communities dominated by sessile suspension feeders (such as sponges, corals, and bivalves) form three-dimensional structures which provide architectural complexity and shelter for several species. These communities are, in part, structurally and functionally similar to the terrestrial forests, with the main diffe...
Article
This study investigates the energetic investment in larval release of two Mediterranean gorgonians with different trophic strategies: Eunicella singularis (mixotroph) and Corallium rubrum (heterotroph). Both are internal brooders, releasing larvae within few weeks in summer. A biochemical approach, based on the analysis of stable isotopes, total li...
Chapter
Full-text available
In the marine benthos, megabenthic communities dominated by sessile suspension feeders (such as sponges, corals, and bivalves) form three-dimensional structures which provide architectural complexity and shelter for several species. These communities are, in part, structurally and functionally similar to the terrestrial forests, with the main diffe...
Chapter
In the marine benthos, megabenthic communities dominated by sessile suspension feeders (such as sponges, corals, and bivalves) form three-dimensional structures which provide architectural complexity and shelter for several species. These communities are, in part, structurally and functionally similar to the terrestrial forests, with the main diffe...
Chapter
Full-text available
Gorgonian corals may form dense canopies, resembling miniature forests. Similarly to terrestrial forests, gorgonian canopies can increase local complexity and biodiversity. The demographic study of gorgonian populations can supply valuable tools to our understanding of their complex, long-lasting life cycles. In this chapter we report on the demogr...
Article
Full-text available
Gorgonian species show a high morphological variability in relation to the environment in which they live. In coastal areas, parameters such as temperature, light, currents, and food availability vary significantly with depth, potentially affecting morphology of the colonies and the structure of the populations, as well as their connectivity patter...
Data
Microsatellite data set. The allele sizes in 6 loci studied in 13 E. singularis populations. (XLS)
Data
Materials and Methods and Results. DNA extraction of the Eunicella species and PCR amplification of the three mitochondrial markers and their genetic variability. (DOCX)
Data
Pairwise genetic p distance among Eunicella species. Pairwise genetic p distance (Dp) among Eunicella species including the sampled populations of Eunicella singularis. (DOCX)
Article
Full-text available
Octocorals are marine modular organisms with high ecological and economic importance. Mediterranean Red Coral (Corallium rubrum), is endemic to the Mediterranean sea and neighboring Atlantic rocky shoresand has been exploited for jewelry since ancient times. Despite the lack of photosynthetic symbionts (Symbiodinium spp.), red coral growth and surv...
Book
The knowledge on the growth patterns of organisms constructing complex threedimensional structures can help in understanding their role as engineering species. Growth and form of several sessile organisms are characterized by different properties; one of those is modularity. Trees in terrestrial habitats and corals in marine environments are sessil...
Chapter
Full-text available
The knowledge on the growth patterns of organisms constructing complex three-dimensional structures can help in understanding their role as engineering species. Growth and form of several sessile organisms are characterized by different properties; one of those is modularity. Trees in terrestrial habitats and corals in marine environments are sessi...
Article
Full-text available
We report the first record from Pakistan of Scleractinian coral species Galaxea fascicularis (Linnaeus, 1767) belonging to the Family Oculinidae (Gray, 1847). The specimens have been found in Paradise Point on the Arabian Sea, a beach located at 31 km west of Karachi city, Sindh, Pakistan. Galaxea fascicularis is common in the Indo-Pacific and its...
Poster
Once considered abundant, the short-beaked common dolphin (Delphinus delphis) in the Mediterranean Sea has been subject to a large-scale decline during the last few decades. Despite considerable efforts in the conservation of this species, to date, only a few conservation measures have been implemented. Furthermore, although Malta is recognized as...
Article
Full-text available
The decline in abundance of scleractinian corals over the past three decades in the Caribbean has raised the possibility that other important benthic taxa, such as octocorals, are also changing in abundance. We used photoquadrats taken over 20 yr from reefs (7–9 m depth) at six sites on the south coast of St. John, US Virgin Islands, to test the hy...
Article
Full-text available
Over the last years, several marine populations suffered a drastic mortality increase of different origins; assessing the changes occurring in the demographic structure of such populations will allow evaluating their future trends and their ultimate fate. The aim of our research was to assess main demographic descriptors and related dynamics in pop...
Book
The Islamic Republic of Pakistan is situated roughly between 20° and 25° north, 59° and 70° east longitude on the northern part of the Arabian Sea, with a coastline of 990km. Pakistan coasts are characterized by the presence of coral reefs, the most highly productive ecosystem in the tropical Oceans, distributed in southeastern part of Arabian Sea....
Article
Full-text available
Connectivity is currently emphasized as a key factor in conservation for its role in enhancing biodiversity of an area and giving benefit to the adjacent areas. For most marine species, connectivity is synonomous of larval dispersal. We applied a spatially explicit meta - population model to test the hypothesis that larval dispersal can affect loca...