
Nadia AmézianeMuséum National d'Histoire Naturelle · Département milieux et peuplements aquatiques
Nadia Améziane
PhD, HDR
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Introduction
Publications
Publications (130)
Holopodidae is one of the three families in the order Cyrtocrinida that have extant representatives. Two genera have been described, Holopus and Cyathidium, both with extant species and fossil representatives dating back to the Cenomanian (Late Cretaceous). Eocene (Lutetian) holopodid material from the Chiampo Valley (north-eastern Italy) has recen...
We conducted experiments with various growing conditions, both at sea and indoors, to explore the growth potential of Holothuria (Panningothuria) forskali Delle Chiaje, 1823 juveniles. Sea trials involved co-culture with European abalones (EA) or placement underneath European flat oysters (EO) or Pacific oysters (PO), using juveniles of 6–8 g initi...
Previous molecular phylogenetic reconstructions have highlighted frequent convergences and iterations of external morphological characters during the evolution of crinoids. Classifications of extant and fossil crinoids based on these characters need to be thoroughly revised. This is particularly the case for the Isocrinida. We propose a new classif...
Effective bioinspiration requires dialogue between designers/engineers, and biologists, and this dialogue must be rooted in a shared scientific understanding of living systems. To support learning from “nature’s overarching design lessons” the Biomimicry Institute has produced ten “Unifying Patterns of Nature”. These patterns have been developed to...
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Fatty acids and carotenoids are known to have roles in embryonic and larval development of sea cucumbers, but their changes in gonads during gametogenesis have not yet been studied. To improve our knowledge of the reproductive cycle of sea cucumbers in an aquaculture perspective, we collected 6-11 individuals of the species Holothuria...
Ontogeny of non-muscular brachial articulations in extant species of Balanocrininae, i.e., Neocrinus decorus, Neocrinus blakei and Hypalocrinus naresianus (Crinoidea, Isocrinida), is described using SEM observations. All three species share embayed synarthries and symplexies (previously only known in crinoid stalks) showing a radiating crenularium...
Various research projects in Europe and North Africa have recently intended to breed temperate holothurians to alleviate fishing pressure on natural populations. However, to date little is known about the nutritional requirements of East Atlantic and Mediterranean species. In this study, we propose a “natural population”‐oriented approach to charac...
In the last decades, the increasing demand of holothurian species for the Asian market have led to an uncontrolled exploitation of marine wild stocks. It has resulted in the collapse of natural resources. Aquaculture of Indo-Pacific species such as Apostichopus japonicus and Holothuria scabra has been developed since the 80s. However, the demand co...
Holothuria forskali (Delle Chiaje, 1823), also called the “black sea cucumber or cotton spinner”, is a native species from the North East Atlantic Area and the Mediterranean Sea. This holothurian is newly targeted to supply the Asian Market. In this context, developing aquaculture is important to prevent risks of over fishing. This paper describes...
All native fishes living in the Caribbean island rivers are considered diadromous but few species have been validated as diadromous. In Guadeloupe (Lesser Antilles) as well as in the other tropical islands, the riverine habitats are subject to strong anthropogenic pressure due to resource modifications or dams. The management of fish biodiversity r...
Ptilocrinus amezianeae is a Vulnerable Marine Ecosystem (VME) indicator species and often collected in numbers locally. P. amezianeae has been described to be restricted to oligotrophic habitats and, as a member of the family Hyocrinidae, a rare organism. Here we model P. amezianeae suitable habitat using BRT (Boosted Regression Trees) and an itera...
In the current context of climate change, sea-surface temperature variation, sea level rise and latitudinal shifts of currents and hydrological fronts are expected to affect marine biodiversity of the sub-Antarctic Islands, particularly in coastal waters. Characterising the impacts of climate change on marine communities requires recording environm...
The deep-sea benthic ecosystems of the French Kerguelen exclusive economic zone remain poorly understood. To address benthic conservation issues, the authors recently contributed expert knowledge to guide the recent extension of the Marine Reserve of the 'Terres australes françaises'. In this new study, we propose a benthic ecoregionalisation of th...
We present here the workflow of a large scale barcoding project of the benthic fauna of the French Exclusive Economic Zone of the Kerguelen archipelago. This project is part of a larger project that comparing faunistic assemblages through space and time, and aims to compute habitat models to highlight the structuration of the benthic communities an...
The genus Conocrinus d’Orbigny, 1850 (Crinoidea, Bourgueticrinina) was established on the basis of two aboral cups that had previously been described as Bourgueticrinus thorenti d’Archiac, 1846. One of these (now considered lost) came from the “Rocher du Goulet” at the base of the Biarritz section (Bartonian, Côte des Basques, southwest France). D’...
The deep-sea benthic ecosystems of the French Kerguelen exclusive economic zone remain poorly understood. To address benthic conservation issues, the authors recently contributed expert knowledge to guide the recent extension of the Marine Reserve of the 'Terres australes françaises'. In this new study, we propose a benthic ecoregionalisation of th...
A huge barcoding effort has been ongoing since the last IPY (2007-2008) and resulted in a wealth of taxonomic findings. New species as well as yet unrecognised variants have been discovered and described. In parallel, conservation planning in Antarctica has strengthened with the enforcement of the Heard Island and McDonald Islands (HIMI) Marine Res...
This document is a short extraction from the article “Benthic ecoregionalisation and conservation issues in the French Exclusive Economic Zone of Kerguelen” submitted the 16/05/2018 to the journal CCAMLR Science for the proceedings of The Second Symposium on Kerguelen Plateau Marine Ecosystems and Fisheries (13–15 November 2017, Hobart, Tasmania)....
The Muséum national d’Histoire naturelle presented at the 2017 EMM Working Group of the CCAMLR a new data acquisition protocol for benthos bycatch in the French fisheries of the Southern Ocean. This new framework has been used to set the field work during the Poker 4 fish biomass survey. The protocol is based on the sampling of specimens and the we...
The present dataset is a compilation of georeferenced occurrences of asteroids (Echinodermata: Aster-oidea) in the Southern Ocean. Occurrence data south of 45°S latitude were mined from various sources together with information regarding the taxonomy, the sampling source and sampling sites when available. Records from 1872 to 2016 were thoroughly c...
Species flocks ( SF s) fascinate evolutionary biologists who wonder whether such striking diversification can be driven by normal evolutionary processes. Multiple definitions of SF s have hindered the study of their origins. Previous studies identified a monophyletic taxon as a SF if it displays high speciosity in an area in which it is endemic (cr...
In the current context of climate change, variations in sea surface temperature, sea level change, and latitudinal shifts of currents and hydrological fronts are expected to affect marine biodiversity of the Sub-Antarctic Islands located near the Polar Front, such as the Kerguelen Islands, particularly in coastal waters. Characterizing the impact o...
Autonomous Reef Monitoring Structures are standardized artificial largely used in shallow, tropical marine locations to assess the cryptofauna (Knowlton et al. 2010, Plaisance et al. 2011, Knowlton et al. 2015). These multilayer type I PVC structures offer a succession of closed and open layers for the small and very small fauna and flora to coloni...
Increasing atmospheric carbon dioxide concentration alters the chemistry of the oceans towards more acidic conditions. Polar oceans are particularly affected due to their low temperature, low carbonate content and mixing patterns, for instance upwellings. Echinodermata were hypothesized to be at risk due to their high-magnesium calcite skeleton. H...
Dans le contexte actuel de changement climatique, les variations du niveau de la mer et de la biodiversité marine auront une incidence sur les écosystèmes marins des îles subantarctiques, en particulier dans les eaux côtières.
Des sites explorés au cours des programmes marins passés autour des Kerguelen ont été revisités lors de 3 campagnes d'été d...
In 2015, the Muséum national d’Histoire naturelle has started to develop a new data acquisition protocol for benthos bycatch in the French fisheries of the Southern Ocean (statistical areas 58.5.1, 58.6, 58.4.3a, 58.4.4b, 58.4.2) . This protocol aims at producing presence and abundance data of the benthic macro-invertebrates collected by the fishin...
In the current context of climate change, sea level variations and the alteration of marine biodiversity are expected to impact marine ecosystems of the sub-Antarctic Islands and coastal areas in particular. Coastal marine areas of the Kerguelen Islands investigated during previous oceanographic programs were revisited during three scientific summe...
In the North-East Atlantic, the English Channel constitutes a biogeographical transition zone between the cold-temperate Boreal province in the North and the warm-temperate Lusitanian province in the South. Historical works have shown that the distribution of macrobenthic invertebrates in the Channel was influenced by thermal gradients from West to...
Comme dans toutes les mers, les écosystèmes côtiers des régions subantarctiques concentrent une importante biodiversité et sont confrontés à des changements environnementaux dont les effets sont encore mal cernés (évolution des températures, modification des courants marins, glissements saisonniers, migration d’espèces…). En particulier, les écosys...
In the North-East Atlantic, the English Channel constitutes a biogeographical transition zone between the cold-temperate Boreal province in the North and the warm-temperate Lusitanian province in the South. Historical works have shown that the distribution of macrobenthic invertebrates in the Channel was influenced by thermal gradients from West to...
An annotated check-list is given of Crinoidea species occurring deeper than 2000 m in the seas bordering Europe. The check-list is based on published data. The check-list includes 21 species. For each species synonymy, data on localities in European seas and general species distribution are provided. Station data are presented separately in the pre...
Gregarines are unicellular eukaryotes belonging to the Apicomplexan phylum (Levine, 1970), that parasite a wide diversity of non-vertebrates marine hosts such as annelids, shellfish, echinoderms, tunicates as well as a wide diversity of non-vertebrates terrestrial organisms such as insects. However, they remain very poorly sampled at the molecular...
A new stalk articulation named pseudo-synarthry is here described from the mesistele of Vityazicrinus petrachenkoi, a rare deep-sea crinoid from the Central Pacific Ocean. Pseudo-synarthries have an articulation facet displaying a general structure closely resembling the morphology of the true synarthry, i.e., with a strong bilateral symmetry and d...
A new phylogeny in parallel to a high resolution sampling in the Southern Ocean has helped develop a better understanding of the crinoid diversity south of the Polar Front. Eléaume (2006) had listed a total of 38 species in 20 genera and 6 families. The barcoding approach has permited to construct a reference database that has helped identify 1- co...
The Antarctic continental shelf has undergone cycles of glaciations for millions of years since the onset of ice sheets about 35 Mya. This succession is suspected to have driven cycles of genetic divergence within benthic species, and enhanced the Antarctic “biodiversity pump”. The use of DNA sequencing and molecular analyses for the Antarctic bent...
the Kerguelen Plateau possesses a very diverse benthic fauna. over the years, the number of species
recorded from the Kerguelen has substantially increased. From 172 species reported by Arnaud (1974), the total number of species has increased dramatically to 735 (Jouventin et al., 1996) and then to 960 in the present study. this area is particularl...
The first crinoid species described from the Southern Ocean were dredged during the Challenger expedition (1872–1876). Carpenter (1884, 1888) was the first crinoid expert to study the Southern Ocean crinoid fauna. Immediately following the Antarctic expeditions of the late 19th and early 20th centuries, Clark (1915), Mortensen (1917), John (1938, 1...
Different approaches to the significance of morphological characters have led to alternative opinions on the phyletic affinities within the class Crinoidea. The molecular approach developed in this work represents a new, extensive, independent dataset that allows the testing of alternative crinoid inter-relationship hypotheses. We sampled 105 speci...
The extant crinoid fauna results from more than 485 Myr of evolution (from Early Ordovician). Detailed morphological studies on extant crinoids document large intraspecific variations, strong changes through ontogeny with various mosaics of heterochronic development, and adaptive characters which depend on environment, mainly hydro - dynamics and f...
There has been a significant body of literature on species flock definition but not so much about practical means to appraise them. We here apply the five criteria of Eastman and McCune for detecting species flocks in four taxonomic components of the benthic fauna of the Antarctic shelf: teleost fishes, crinoids (feather stars), echinoids (sea urch...
The Antarctic continental shelf has undergone cycles of glaciations for millions of years since the onset of ice sheets about 35 Mya. This succession is suspected to have driven cycles of genetic divergence and allopatric speciation within benthic species, and enhanced the Antarctic “biodiversity pump”. It is unlikely that the totality of the organ...
This circumpolar dataset of the comatulid (Echinodermata: Crinoidea) Promachocrinus kerguelensis (Carpenter, 1888) from the Southern Ocean, documents biodiversity associated with the specimens sequenced in Hemery et al. (2012). The aim of Hemery et al. (2012) paper was to use phylogeographic and phylogenetic tools to assess the genetic diversity, d...
Sampling data associated to the 1307 specimens of Promachocrinus kerguelensis sequenced in Hemery et al. (2012). (doi: 10.3897/zookeys.315.5673.app) File format: Comma-Separated Values File (csv).
The purpose of PROTEKER** is to create a coastal ecological and genetic observatory. In the current context of climate changes, variations of sea level and marine biodiversity (extinction, shifts, replacements, invading species) will concern the Southern Islands, especially the coastal benthic communities. Kerguelen Islands, situated at the norther...
Au cours de l’évolution biologique qui a débuté sur Terre il y a plus de 3,5 milliards d’années, les organismes vivants ont développé la capacité d’associer des éléments minéraux à des molécules organiques pour former des structures minéralisées rigides. Ce phénomène, que l’on nomme la biominéralisation, est à l’origine de la formation des plaques...
Si les êtres les plus extrêmophiles sont des procaryotes, des eucaryotes unicellulaires et des métazoaires vivent aussi dans des milieux que l’on pensait incompatibles avec la vie. L’océan qui entoure le continent Antarctique et le plancher océanique sont deux milieux aux caractéristiques physiques particulières qui abritent, l’un, une diversité ri...
The marine invertebrates barcoding effort engaged at the MNHN contributed to many different projects. First, an unprecedented sample of Antarctic crinoids has been barcoded revealing probable cryptic speciation within different taxa. For example, seven sympatric COI lineages can be distinguished within the broadcaster Promachocrinus kerguelensis, a...
More than 45 species of crinoids are known from the Southern Ocean. The greatest diversity is reported from the Weddell Sea and the Peninsula. 50% of the crinoid species are brooders. A few species are very abundant and represent over 80% of the total biomass. Among these, the majority are circumpolar in distribution while being either broadcasters...
During the last decades, R/V Meteor and R/V Polarstern deep-sea investigations in the south Atlantic and neighbouring Southern Ocean collected new samples of stalked crinoids belonging to the families Bathycrinidae, Phrynocrinidae and Hyocrinidae which are herein described. The species found are Bathycrinus australis A.H. Clark, 1907b (the most abu...
We present the first molecular phylogeny of
Cidaroida, one of the most problematic groups within the
echinoids. Two genes—the nuclear ribosomal gene 28 S
rRNA and the mitochondrial protein-encoding gene COI—
were obtained from 21 specimens representing 17 genera
and 20 species, among which 13 species belong to Cidaroida.
Phylogenetic analyses of th...
Dans le cadre de la création d’un réseau d’Aires Marines Protégées en Antarctique, la zone CEAMARC (Mer Dumont d’Urville) a été retenue comme pouvant faire partie de ce réseau circumpolaire. Les analyses des structures géomorphologiques et des communautés pélagiques de la région suggèrent que la zone CEAMARC présente de forts gradients écologiques....
Sampling at appropriate spatial scales in the Southern Ocean is logistically challenging and may influence estimates of diversity by missing intermediate representatives. With the assistance of sampling efforts especially influenced by the International Polar Year 2007-2008, we gathered nearly 1500 specimens of the crinoid species Promachocrinus ke...
The CCAMLR MPA Workshop on Marine Protected Areas, held in Brest (France) in August 2011, recommended that the Scientific Committee considers supporting three technical workshops including one specific to Planning Domain 5. Planning Domain 5 includes Marion and Prince Edward Islands, the Del Cano Rise and the Crozet Archipelago in the north. It als...
Si les êtres les plus extrêmophiles sont des procaryotes, des eucaryotes unicellulaires et des métazoaires vivent aussi dans des milieux que l’on pensait incompatibles avec la vie. L’océan qui entoure le continent Antarctique et le plancher océanique sont deux milieux aux caractéristiques physiques particulières qui abritent, l’un, une diversité ri...
The comatulid crinoid Anthometrina adriani is well represented among the
suspension-feeding megaepibenthos from the continental shelf of the Dumont D’Urville Sea,
Antarctica. Nearly 500 specimens were sampled during the Collaborative East Antarctic Marine
Census expedition onboard the RV ‘Aurora Australis’ (December 2007 to January 2008), from 50
o...
La biodiversité du plateau continental Antarctique est de mieux en mieux connue. Du gène à la communauté, nos savoirs ont beaucoup progressé en l'espace de quelques années, notamment grâce aux campagnes mises en oeuvre lors de l'Année Polaire Internationale. Lors de la campagne CEAMARC, un effort collaboratif tout particulier a permis de réaliser,...
The crinoid genus Antedon (six species) lives in the NE Atlantic and the Mediterranean. Diagnostic characters overlap, therefore species distributions are unsettled. A. petasus, A. bifida, A. moroccana and A. hupferi are distributed along the Atlantic coast from Scandinavia to Senegal with unknown boudaries. A. mediterranea is found in the Mediterr...
La problématique des Aires Marines Protégées (AMPs) dans l’océan Austral a été discutée dès 2005 au sein du groupe Ecosystem Monitoring Management (EMM) de la CCAMLR. Lors du SC CAMLR de 2008, onze zones d’intérêt potentiel pour des aires marines protégées dans l’océan Austral ont été définies (Fig. 1). La définition de ces zones a été déterminée à...
Zimmermann, G., Bosc, P., Valade, P., Cornette, R., Améziane, N. and Debat, V. 2011. Geometric morphometrics of carapace of Macrobrachium australe (Crustacea: Palaemonidae) from Reunion Island. —Acta Zoologica (Stockholm) 93: 492–500.
We investigated the structure of carapace shape variation in six populations of Macrobrachium australeGuérin-Ménevi...
Les deux premières campagnes liées au programme de l’IPEV REVOLTA (Radiations EVOLutives en Terre Adélie, n°1124, IPEV) se sont déroulées au cours des étés austraux 2009-2010 et 2010-2011. Les objectifs de ce programme sont : (1) explorer la biodiversité de la faune marine ; (2) caractériser les assemblages que forment ces organismes marins ; (3) t...
Ptilocrinus amezianeae est une nouvelle espèce de Hyocrinidae (Echinodermata) décrite de seamounts au large de la mer de Ross et du Plateau de Kerguelen. La modélisation de la probabilité de présence des P. amezianeae a été réalisée grâce aux données de présence récoltées par les contrôleurs de pêche embarqués sur les palangriers et grâce aux spéci...
Pictures and videos of the benthic communities of the Antarctic shelf show that Deuterostomia, especially ascidians, echinoderms and teleosts, are largely represented in many of the habitats. However, the morphological identification of most species is not easy. Ascidian identification is particularly difficult and requires skilled experts, but eve...
A large collection of ascidians was made during the CEAMARC Aurora Australis V3 cruise off Terre Adélie and George V Land a region rarely investigated before at these depths. Sampling was performed by beam trawls and a dredge between 138°– 146° latitude East and from 150 to 1700 m depth, on the Antarctic shelf and slope. Three of the 33 ascidian sp...
The Dumont d’Urville Sea (East Antarctic region) has been less investigated for DNA barcoding and molecular taxonomy than other parts of the Southern Ocean, such as the Ross Sea and the Antarctic Peninsula. The Collaborative East Antarctic MARine Census (CEAMARC) took place in this area during the austral summer of 2007–2008. The Australian vessel...
The Dumont d’Urville Sea (East Antarctic region) has been less investigated for DNA barcoding and molecular taxonomy than other parts of the Southern Ocean, such as the Ross Sea and the Antarctic Peninsula. The Collaborative East Antarctic MARine Census (CEAMARC) took place in this area during the austral summer of 2007–2008. The Australian vessel...
For the first time, comatulid crinoid feeding behaviour is used to infer near-bottom current (NBC) directions on the Terre Adélie and George V shelf, East Antarctica. We analysed 47 still-image and video transects sampled during the Collaborative East Antarctic Marine Census (CEAMARC) expedition in 2007–2008. We recorded the inferred current direct...
Faunal investigations conducted in 1997 on southern Tasmania seamounts, produced 10 specimens of stalked crinoids belonging to the family Hyocrinidae. These are the first hyocrinids to be recorded from this area. Three new species are described: Feracrinus koslowi sp. nov., Ptilocrinus tasmaniaensis sp. nov. and Ptilocrinus australis sp. nov. New d...