About
86
Publications
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Introduction
I studied whale communication until my interests shifted towards eco-acoustics. I use ocean sounds to better understand marine ecosystems & dynamics. I decompose soundscapes to study how the biophony is shaped by the environment and how acoustic cues can unveil information on organism-environment relationships and ecosystem state & functioning. Since 2014, I am involved in projects and a large-scale monitoring network in close collaboration with environmental managers. https://luciadiiorio.site/
Additional affiliations
July 2021 - present
January 2017 - June 2021
Chorus Institute
Position
- PI
Description
- PI in ecoacoustics with a particular focus on vulnerable habitats and species of the Mediterranean Sea. My work includes monitoring & research programs with environmental mangagers;
Education
September 1994 - June 1999
Publications
Publications (86)
Although mesophotic coral ecosystems account for approximately 80% of coral reefs, they remain largely unexplored due to their challenging accessibility. The acoustic richness within reefs has led scientists to consider passive acoustic monitoring as a reliable method for studying both altiphotic and mesophotic coral reefs. We investigated the rela...
A working group from the Global Library of Underwater Biological Sounds effort collaborated with the World Register of Marine Species (WoRMS) to create a global inventory of species categorized by known underwater sonifery. The inventory is provided as an ecological trait on WoRMS (MarineSpecies.org), where it may be regularly updated. The purpose...
As biodiversity hotspots, coral reefs are rich with sound cues. Monitoring these soundscapes for changes is essential as coral reefs decline around the world rapidly. Despite this, acoustic metrics that reliably represent reef health are still debated, and ground-truthing of methods are limited. We sought to investigate the occurrence and prevalenc...
A working group from the Global Library of Underwater Biological Sounds effort collaborated with the World Register of Marine Species (WoRMS) to create an inventory of species confirmed or expected to produce sound underwater. We used several existing inventories and additional literature searches to compile a dataset categorizing scientific knowle...
Groupers are marine fishes particularly vulnerable to overexploitation owing to their reproduction‐related traits. The dusky grouper Epinephelus marginatus is classified as ‘Endangered’ in the Mediterranean Sea, where protection measures have proven critical for allowing population recovery and persistence of the species. However, knowledge gaps re...
Knowledge of the ecology, spatial distribution and conservation status of fish populations is achieved by fishery‐dependent techniques, and by more recently developed non‐invasive fishery‐independent techniques. Passive acoustic monitoring (PAM) is a fishery‐independent method that provides remote sensing of soniferous species, populations, communi...
The volumes of “Ocean Sound” recordings now being collected in aquatic systems around the world have reached a level that has necessitated a new wave of data sharing, processing, and analysis techniques to help detect, identify, and assess an increasing number of known and unknown sound sources and sound types. These new tools are matched with a ne...
Passive acoustic monitoring can be used to assess the presence of vocal species. Automatic estimation of such information is critical for allowing diversity monitoring over long-time spans. Among the existing tools, α-acoustic indices have been originally designed to assess the richness/complexity of terrestrial soundscapes. However, their use in m...
Marine noise is an emerging pollutant inducing a variety of negative impacts on many animal taxa, including fish. Fish population persistence and dynamics rely on the supply of early life stages, which are often very sensitive to disturbance. Impacts of marine noise pollution (MNP) on juvenile fish have rarely been investigated in temperate regions...
Mesophotic Coral Ecosystems remain largely unexplored. The aim of this study was to determine how the acoustic fsh biodiversity varied depending on the depth and
the type of island in six Polynesian islands. The link between benthic cover and fsh sound diversity was established. In most islands, acoustic fsh α-diversity decreased between 20 and 60...
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...
This study investigates the sounds and the anatomy of the sound‐producing organ in the male and female sand‐dwelling cusk‐eel Parophidion vassali. Although both sexes have similar external phenotype, they can be distinguished by their sonic apparatus and sounds. As in many Ophioidei, Parophidion vassali presents a panel of highly derived characters...
One of the most studied aspects of animal communication is the acoustic repertoire difference between populations of the same species. While numerous studies have investigated the variability of bottlenose dolphin whistles between populations, very few studies have focused on the signature whistles alone and the factors underlying differentiation o...
Most grouper species worldwide are threatened by overfishing. Effective marine protected areas (MPAs) are known to enable population recovery, and consideration of vulnerable species’ reproductive behaviours is fundamental to monitoring and management plans. Many groupers produce sounds associated with reproductive behaviours. Recording these sound...
Aquatic environments encompass the world’s most extensive habitats, rich with sounds produced by a diversity of animals. Passive acoustic monitoring (PAM) is an increasingly accessible remote sensing technology that uses hydrophones to listen to the underwater world and represents an unprecedented, non-invasive method to monitor underwater environm...
1. Sound production represents an integral part of social communication in many teleost fish; however, few studies have investigated the structure, organization and variability of fish sounds at the community level.
2. Fish acoustic community structure was recorded simultaneously in three sites located along the Mediterranean basin within the ende...
Monitoring the biodiversity of key habitats and understanding the drivers across spatial scales is essential for preserving ecosystem functions and associated services. Coralligenous reefs are threatened marine biodiversity hotspots that are challenging to monitor. As fish sounds reflect biodiversity in other habitats, we unveiled the biogeography...
The ability of different marine species to use acoustic cues to locate reefs is known, but the maximal propagation distance of coral reef sounds is still unknown. Using drifting antennas (made of a floater and an autonomous recorder connected to a hydrophone), six transects were realized from the reef crest up to 10 km in the open ocean on Moorea i...
Marine noise pollution (MNP) can cause a multitude of impacts on many organisms, but information is often scattered and general outcomes difficult to assess. We have reviewed the literature on MNP impacts on Mediterranean fish and invertebrates. Both chronic and acute MNP produced by various human activities - e.g. maritime traffic, pile driving, a...
Ecosystems and the communities they support are changing at alarmingly rapid rates. Tracking species diversity is vital to managing these stressed habitats. Yet, quantifying and monitoring biodiversity is often challenging, especially in ocean habitats. Given that many animals make sounds, these cues travel efficiently under water, and emerging tec...
Conservation of exploited fish populations is a priority for environmental managers. Spatio-temporal knowledge on reproductive sites is mandatory for species and habitat conservation but is often difficult to assess, particularly over vast geographic areas. Regular and long-term standardized surveys are necessary to identify reproductive sites, ass...
Although several bioacoustics investigations have shed light on the acoustic communication of Mediterranean fish
species, the occurrence of fish sounds has never been reported below 40 m depth. This study assessed the
occurrence of fish sounds at greater depths by monitoring the soundscape of a Mediterranean submarine canyon
(Calvi, France) thanks...
Passive acoustic monitoring (PAM) uses hydrophones to record all components of underwater soundscapes, including fish calls. Several studies have used PAM to investigate different aspects of vocal fish species, such as presence, distribution, relative abundance, diel, lunar and seasonal cycle of activity as well as for delimitating spawning areas a...
Submarine canyons are key structures for ecosystem functioning in the Mediterranean Sea. This study was conducted in the canyon of Calvi (North-West Corsica, France) by using a combination of Static Acoustic Monitoring (SAM) and hydrophone integrated gliders (Seaexplorer, Alseamar). During summer 2016 and 2017, three SAM campaigns (-125 m to -150 m...
The /Kwa/ vocalization dominates the soundscape of Posidonia
oceanica meadows but the identity of the species emitting this
peculiar fish sound remains a mystery. Information from sounds
recorded in the wild indicates that the emitting candidates should be
abundant, nocturnal and benthic. Scorpaena spp. combine all these
characteristics. This study...
Assessing fish biodiversity patterns is a major concern in aquatic science and conservation. To be effectively used, fish diversity assessments benefit from the use of integrated complementary approaches. Passive acoustics has received increasing attention as a non-invasive, long-term monitoring tool, as it uses biological sounds produced incidenta...
Underwater soundscapes are used as a cue by vertebrate and invertebrate larvae and post-larvae to locate suitable settlement habitats. In the project SEANAPS we investigated if soundscapes can play a role in ecological restoration actions. We assessed whether Biohuts® (artificial nurseries installed in harbors) have a distinct acoustic signature fr...
In response to concerns about the impact of man-made noise on marine ecosystems, researcher and environmental managers are currently collecting in situ measurements of oceanic noise levels. The objectives of in situ measurements are to provide the acoustic signatures of individual ships, with the use of AIS databases, to feed the models; to calibra...
Collision risk and close interactions of cetacean with Marine Renewable Energy (MRE) devices are among the main concerns and the least documented of the list of potential impacts of MRE. In this study, we developed a method to track in three dimensions click trains emitted by cetaceans in a close vicinity to MRE devices. We deployed two synchronize...
Passive acoustics is well suited to assess the diversity and/or activity of marine animals, particularly if cryptic or difficult to observe as in seagrass Posidonia oceanica meadows. The ability to locate the
emitters allows not only to detect the presence of a specific sound or specie but also to estimate source levels, the communicative space wit...
Benthic invertebrate assemblages are known to produce an important biophony composed of short transient sounds emitted while hunting, feeding, moving, for territorial defense etc. Although they exhibit dial
variations, these sounds are present year-round, 24 hours a day and have the potential to provide information on the habitat and organism-envir...
The Acoustic Complexity Index (ACI) is increasingly applied to the study of biodiversity in aquatic habitats. However, it remains unknown which types of acoustic information are highlighted by this index in underwater environments. This study explored the robustness of the ACI to fine variations in fish sound abundance (i.e. number of sounds) and s...
In response to concerns about the impact of manmade noise on marine ecosystems, research and regulatory communities are currently collecting in situ measurements of oceanic noise levels and developing models that map the levels of underwater noise at large scales, forecasting the impact of shipping noise on marine fauna. The objectives of in situ m...
The ability of coastal marine habitats to recruit pelagic post-larvae of fishes and invertebrates has major implications for their functioning. For coral reefs and mangroves, it has been demonstrated that soundscapes (the combination of biotic, abiotic and anthropogenic sounds) are used by post-larvae as an acoustic cue to identify and reach the be...
In the Mediterranean Sea, the seagrass Posidonia oceanica plays a key ecological role, and is protected by a range of legislation. Standard Posidonia monitoring programmes generally focus on the plant at different spatial and short temporal scales, without considering the organisms dependent on the ecosystem. Passive acoustic monitoring (PAM) has a...
Coastal soundscapes are dominated by broadband transient sounds primarily emitted by benthic invertebrates. These sounds are characterized by a very large dynamic of amplitude. The loudest ones propagate further and interfere with the detectability of benthic sounds by invading other more distant habitats. Acoustic diversity assessment is therefore...
Many studies stress the usefulness of fish calls as effective indicators of distinct species occurrence. However, most of these studies have been undertaken in a given area and during restricted periods of time. There is a need to show passive acoustic monitoring is a reliable method to study vocal species over space and time. This study aims to us...
Passive acoustics enables studying marine habitats thanks to the sound production of their inhabitants. A key question is: “Can fish sounds be used as environmental proxies?” Posidonia oceanica (L.) Delile 1813 seagrass meadows constitute an important ecosystem of the Mediterranean Sea which protects many species of invertebrates and fishes, some o...
Marine renewable energy development raised concerns over the impact of underwaternoise. We assessed the acoustic impacts of an operating tidal current turbine (Paimpol-Bréhat site, France) on marine fauna. The turbine’s source level (SL) was estimated using 19 acoustic drifting transects at distances between 100m to 2400m from the device. SL ranges...
Benthic communities emit a variety of sounds associated with movement and feeding activities. Snaps are wide-band signals, their waveforms allow to detect and estimate time-of-arrival difference between sensors reliably. Because of the snap’s bandwidths, a 2 m-compact hydrophone array is adequate to locate emissions. Merging the localization result...
The principle of passive acoustics is to position hydrophones in the water to extract information about biotic and abiotic sounds from the ecosystem. This inexpensive technique (in equipment and human resources) allows to investigate places where man does not have access, like seabeds, and over long periods, allowing to refine observations. In this...
This poster is about the PhD project I am going to carry out at Tavolara–Punta Coda Cavallo MPA (Sardinia, Italy), which aims at 1) collecting local ecological knowledge of fishermen to reconstruct past occurrences of spawning aggregations and abundance/size distribution patterns, and studying behaviour and vocalization of dusky groupers in the spa...
Les herbiers de posidonie sont un écosystème clef de Méditerranée entre 0 et 40 m avec au moins 72 à 86 espèces de poissons dont les densités et la composition spécifique diffèrent suivant les saisons. L’écologie acoustique permet d’étudier cet écosystème et sa dynamique avec une grande résolution. Cependant, il n’existe aucune étude sur la biophon...
Maerl beds are among the most endangered habitats in coastal temperate waters and a priority for conservation. Passive acoustics is a potential non-intrusive approach for surveying this fragile ecosystem with minor disturbances. Invertebrate sounds can be major contributors to natural coastal soundscapes but are not well studied. We conducted contr...
The wind dependence of acoustic spectrum between 100 Hz and 16 kHz is investigated for coastal biologically rich areas. The analysis of 5 months of continuous measurements run in a 10 m deep shallow water environment off Brittany (France) showed that wind dependence of spectral levels is subject to masking by biological sounds. When dealing with ra...
1922 snapshots (10s-long) of sounds have been measured in a small 4km2 coastal area (depth from 0 to 40m) near the pointe of Revelatta (Calvi, Corse). Our aim is to build the soundscape of this complex area hosting four interleaved habitats (rock, seagrass, sand, coralligenous). Wide Band [2 kHz, 40 kHz] SPL is maximum at the rocks and decreases of...
In this communication, we address the development of protocol (instrumentation, algorithms to process the data) to localize and characterize the marine biophony in 3D for coastal environment in a 100 m x 100 m x 15 m volume of water. For the biophony, we focus on the impulses ([1 ms, 20 ms] duration range, [2 kHz, 50 kHz] bandwidth) produced by a l...
The Iroise Marine Natural Park, created in 2007, is the first French natural marine park. This archipelago located in Western Brittany is a shallow water area that comprises 11 islands and hosts a rich variety of marine life, including seaweed fields, benthic organisms, endangered seals, and cetaceans. Three underwater autonomous recorders were moo...
In September 2009, during two days, a geo-acoustic experiment, named ERATO-09, was conducted by SHOM in the Bay of Biscay. During the experiment, the presence of common dolphins (Delphinus delphis) has been noticed. In this paper, we retrospectively evaluate the feasibility of passive acoustic monitoring to derive interactions between active acoust...