Habib Langar

Tunis University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Gérard Pergent

Centre National de la Recherche Scientifique

Aslam Sami Djellouli

Tunis El Manar University

Christine Pergent‐Martini

Centre National de la Recherche Scientifique

Cyrine Bouafif

Tunis University

Chokri Messaoud

National Institute of Applied Science and Technology

Oum Kalthoum Ben Hassine

Tunis University

Fériel Sellem

Institut National des Sciences et Technologies de la Mer

Gérard Pergent

Université de Corse Pascal Paoli

Walid Belgacem

Tunis El Manar University

Rachid Semroud

École Nationale Supérieure des Sciences de la Mer et de l'Aménagement du Littoral

Cooperative Institutions

Centre National de la Recherche Scientifique

Tunis University

Tunis El Manar University

Institut National des Sciences et Technologies de la Mer

Université de Corse Pascal Paoli

Sciences pour l'Environnement

University of Carthage

Ifremer

National Institute of Applied Science and Technology

Institut de Recherche pour le Développement

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Associated mollusc communities of a Posidonia oceanica meadow in Cap Zebib (off North East Tunisia)

Aquatic Botany (2011)

Walid Belgacem Habib Langar Gérard Pergent Oum Kalthoum Ben Hassine

Posidonia oceanica

Potamogetonaceae

10.1016/j.aquabot.2011.09.012

Cite

Citations (14)

Extension of two Caulerpa species along the Tunisian coast

Journal of Coastal Conservation (2002)

Habib Langar Aslam Sami Djellouli Fériel Sellem A. El Abed

Frond

Thallus

Ulvophyceae

10.1652/1400-0350(2002)008[0163:eotcsa]2.0.co;2

Cite

Citations (14)

Antifouling activity and chemical investigation of the brown alga Dictyota fasciola (Dictyotales) from Tunisian coast.

Cahiers de biologie marine (2010)

L. Ktari Abuzer Ali Y. B. Redjem Habib Langar Monia Elbour

Biofouling

Source

Cite

Citations (9)

The neogoniolithon brassica-florida (Harvey) Setchell & L.R. Mason (1943) reef of Bahiret El Bibane lagoon (Southeastern Tunisia)

HAL (Le Centre pour la Communication Scientifique Directe) (2011)

Habib Langar Meriem Bessibes Aslam Sami Djellouli Christine Pergent‐Martini Gérard Pergent

Source

Cite

Citations (0)

Morphology and Genetic Studies of Cymodocea Seagrass Genus in Tunisian Coasts

Phyton (2019)

Ramzi Bchir Aslam Sami Djellouli Nadia Zitouna Didier Aurelle Gérard Pergent

Specimens of Cymodocea (Viridiplantae, Magnoliophyta) collected on the Tunisian coasts showed a particular morphological and anatomical difference with the classical descriptions of Cymodocea nodosa (Ucria) Asch. the only species of this genus reported in the Mediterranean Sea. In order to precise the taxonomic identity of the new specimens we aimed in this work (i) to verify the identity of the new forms, (ii) to evaluate the genetic diversity of the population, (iii) to test the validity of the existing identification keys of the Tunisian Cymodocea populations. Four stations located in two regions of the Tunisian coasts were sampled. Leaf morphological and anatomical characters used in taxonomic identification were measured (e.g., number of cross veins, shape of the apex). The genetic study was performed using three most common chloroplast markers for plant characterization (DNA barcodes rbcL, matK and trnHpsbA). The morphological study revealed the presence of three C. nodosa morphotypes, described here for the first time, while the molecular characterization did not allow the discrimination of these morphological types. In regard to these results, it would be wise to review the classical identification keys of the Cymodocea genus.

Identification

Morphometrics

10.32604/phyton.2019.05261

Cite

Citations (2)

Bioethanol production from Tunisian macroalgal biomass

Euro-Mediterranean Journal for Environmental Integration (2024)

Neila Smichi Yosra Messaoudi N. Moujahed Chokri Messaoud Habib Langar

10.1007/s41207-024-00482-7

Cite

Citations (0)

Nouvelles connaissances sur les herbiers tigrés de Méditerranée.

HAL (Le Centre pour la Communication Scientifique Directe) (2010)

Gérard Pergent Sebastiano Calvo Gianluigi Cancemi Aslam Sami Djellouli Renaud Dupuy de la Grandrive

Les herbiers a Posidonia oceanica presentent plusieurs types morpho-structuraux generalement conditionnes par les conditions de milieu (profondeur, hydrodynamisme, substrat, pente, turbidite, sedimentation). Du fait de leur rarete, deux structures particulieres, les recifs barriere et les herbiers tigres, sont considerees depuis une vingtaine d'annees comme des paysages marins menaces. Initialement decrits dans le golfe de Gabes, a proximite des iles Kerkennah, les herbiers tigres se presentent sous forme de rubans assez etroits qui se developpent entre 0.5 et 3 m de profondeur sur matte . La mise en place de nouveaux programmes d'etudes sur les herbiers a Posidonia oceanica et l'optimisation de l'imagerie satellitaire (accessibilite, resolution, cout) ont permis d'acquerir de nombreuses donnees dans plusieurs secteurs de Mediterranee et d'actualiser notre connaissance de ces structures. Il apparait ainsi que les herbiers tigres sont mieux representes au niveau de la rive Sud du bassin (Golfe de Gabes, littoral de Zarzis en Tunisie, lagune de Farwa et littoral a l'Est de Tripoli en Libye) et dans des iles mediterraneennes (Marsala-Stagnone en Sicile et Porto-Vecchio en Corse). D'autre part la presence d'herbiers tigres sur roche a ete observee pour la premiere fois en Libye sur un platier rocheux a l'Est de Tripoli. Compte tenu de leur rarete et des pressions qu'elles subissent, il apparait urgent de classer ces structures comme monuments naturels et mettre en œuvre une politique efficace pour assurer leur conservation

Source

Cite

Citations (1)

Extension of twoCaulerpa species along the Tunisian coast

Journal of Coastal Conservation (2002)

Habib Langar Aslam Sami Djellouli Fériel Sellem A. El Abed

Frond

Thallus

Ulvophyceae

10.1007/bf02788954

Cite

Citations (1)

Morphological and Genetic Study of the Genus Cymodocea K.D. König (1805) Along Tunisian Coasts

Transylvanian Review (2017)

Ramzi Bchir Aslam Sami Djellouli Nadia Zitouna Didier Aurelle Gérard Pergent

The presence along the Tunisian coasts of different morphological and anatomical Cymodocea specimens suggest the presence of different species while the Mediterranean is threatened by the introduction of a great number of aliens. So, in order to survey any introduction of Cymodocea alien species, we aimed in this work to verify (i) the identity of the new forms and (ii) to evaluate the genetic diversity of the Tunisian Cymodocea populations and (iii) the validity of the existing identification keys. Samples were collected from four stations situated in two regions of the Tunisian coasts located in the eastern Mediterranean basin. We measured on mature leaves the biometric parameters (number of cross veins, width of the apex, absence or presence of teeth on the apex margins and shape of apices). Three chloroplast DNA barcoding (rbcL, matK and trnHpsba) was used to discriminate taxonomically between Cymodocea populations. Biometrics parameters leaded to distinguish three Cymodocea nodosa morphotype wish are described here for the first time. However, the DNA markers rbcL, matK and trnHpsbA has not allowed to discriminate taxonomically between the morphological new types. The observed morphological variations might be phenotypical variations induced by different ecological conditions or genetic specific characters that can't be detected by the used markers.

DNA Barcoding

Source

Cite

Citations (0)

ALIEN MARINE SPECIES OF LIBYA: FIRST INVENTORY AND NEW RECORDS IN EL-KOUF NATIONAL PARK (CYRENAICA) AND THE NEIGHBOURING AREAS

Mediterranean Marine Science (2013)

Hocein Bazaïri Yassine Ramzi Sghaier Ibrahem Benamer Habib Langar Gérard Pergent

The presence of marine alien species in El-Kouf National Park and the neighbouring areas was assessed using a compilation of available information and observations, a field survey conducted on October 2010 in the framework of the MedMPAnet project and results of further monitoring during June and September 2012. A total of 9 alien species were reported: the Rhodophyta Asparagopsis taxiformis (Delile) Trevisan de Saint-Léon, the Chlorophyta Caulerpa racemosa var. cylindracea (Sonder) Verlaque, Huisman & Boudouresque, the crab Percnon gibbesi (H. Milne-Edwards, 1853) and the fishes Fistularia commersonii Rüppell, 1838, Siganus luridus (Rüppell, 1829), Siganus rivulatus Forsskål, 1775, Pempheris vanicolensis Cuvier, 1831, Lagocephalus sceleratus (Gmelin, 1789) and Sphyraena flavicauda Rüppell, 1838. Several of them were until now unknown for the National Park. The list of alien marine species of Libya is updated and discussed. Until now 63 marine aliens species were recorded along the Libyan coasts. These include 3 Foraminifera, 3 Ochrophyta, 5 Rhodophyta, 5 Chlorophyta, 1 Magnoliophyta, 11 Arthropoda, 13 Mollusca, 1 Echinodermata and 21 Chordata. Among these Non Indigenous Species, 43 are known as established along the Libyan coast including 8 invasive, 11 casual, 6 questionable, 3 cryptogenic and 1 unknown. An in-depth study of the marine organisms would substantially increase the number of alien species occurring in Libya. Monitoring of marine assemblages of MPAs is a valuable opportunity to go further into the knowledge of native and introduced species.

Marine protected area

10.12681/mms.555

Cite

Citations (25)