Etude faunistique et écologique des annelides polychètes de la côte Nord-Est de la Tunisie (Peninsule du Cap Bon, Mediterranée Ouest)

Etude faunistique et écologique des annelides polychètes de la côte Nord-Est de la Tunisie (Peninsule du Cap Bon, Mediterranée Ouest)

The polychaetes communities structure and functioning of the Cap Bon peninsula (Northeast coast of Tunisia), were analyzed from 52 stations from Sidi Daoud to Menzel Horr. The faunistic study reveals the presence of 238 polychaetes species among which 86 records are newly reported for the Tunisian coasts. The total number of polychaetes listed in Tunisia rises to 375 species. The polychaete community structure at the sites was examined by multivariate methods. five main polychaetes communities were identified in the study area, the sandy sediment community (SS), the muddy sediments community (SV), the coarse sediment community (SG), the fine-muddy sediment community (SFV) and the Heterogeneous sediments community (HS). These communities are distributed mainly according to the particle size sediment and the Sampling depth. The SS community characterized by the dominance of Eunice vittata and the SG community dominated by Aponuphis fauveli showed the greatest number of species and diversity. Aponuphis fauveli, Eunice vittata and Protodorvillea kefersteini were the dominant species in the area. The particle size sediment and the sampling depth are also the main factors that govern the seasonal distribution of the polychaete communities in the Sidi Daoud-Ras Lahmer zone. Monitoring reveals that summer and winter seasons showed the highest values of density and diversity. The Cap Bon peninsula as a coastal zone is exposed to increasing anthropogenic activities, such as urban and industrial discharges and terrigenous several wadis. Polychaetes which react differently to this situation constitute an effective biological tool to detect signs of environmental degradation. Ecological groups and the AMBI index (Azti Marine Biotic Index) were used with biodiversity indices in order to evaluate the ecological quality of the Cap Bon peninsula. The general status of the study area is generally satisfactory and slightly polluted, except the inner part of the Sidi Daoud bay (station D and E) where we recorded an extremely polluted status. The first estimate of the genetic diversity populations of Hyalinoecia tubicola and Aponuphis bilineata based on the RAPD data analysis showed that these two species seem to be genetically similar.

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Bibliographic Details
Main Author: Zaabi-Sendi, Sana
Format: Theses and Dissertations biblioteca
Language:French
Published: 2013
Subjects:Polychaeta, Annelida, Seasonal variations, Genetic diversity,
Online Access:http://hdl.handle.net/1834/5480
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id dig-aquadocs-1834-5480
record_format koha
institution UNESCO
collection DSpace
country Francia
countrycode FR
component Bibliográfico
access En linea
databasecode dig-aquadocs
tag biblioteca
region Europa del Oeste
libraryname Repositorio AQUADOCS
language French
topic Polychaeta
Annelida
Seasonal variations
Genetic diversity
Polychaeta
Annelida
Seasonal variations
Genetic diversity
spellingShingle Polychaeta
Annelida
Seasonal variations
Genetic diversity
Polychaeta
Annelida
Seasonal variations
Genetic diversity
Zaabi-Sendi, Sana
Etude faunistique et écologique des annelides polychètes de la côte Nord-Est de la Tunisie (Peninsule du Cap Bon, Mediterranée Ouest)
description The polychaetes communities structure and functioning of the Cap Bon peninsula (Northeast coast of Tunisia), were analyzed from 52 stations from Sidi Daoud to Menzel Horr. The faunistic study reveals the presence of 238 polychaetes species among which 86 records are newly reported for the Tunisian coasts. The total number of polychaetes listed in Tunisia rises to 375 species. The polychaete community structure at the sites was examined by multivariate methods. five main polychaetes communities were identified in the study area, the sandy sediment community (SS), the muddy sediments community (SV), the coarse sediment community (SG), the fine-muddy sediment community (SFV) and the Heterogeneous sediments community (HS). These communities are distributed mainly according to the particle size sediment and the Sampling depth. The SS community characterized by the dominance of Eunice vittata and the SG community dominated by Aponuphis fauveli showed the greatest number of species and diversity. Aponuphis fauveli, Eunice vittata and Protodorvillea kefersteini were the dominant species in the area. The particle size sediment and the sampling depth are also the main factors that govern the seasonal distribution of the polychaete communities in the Sidi Daoud-Ras Lahmer zone. Monitoring reveals that summer and winter seasons showed the highest values of density and diversity. The Cap Bon peninsula as a coastal zone is exposed to increasing anthropogenic activities, such as urban and industrial discharges and terrigenous several wadis. Polychaetes which react differently to this situation constitute an effective biological tool to detect signs of environmental degradation. Ecological groups and the AMBI index (Azti Marine Biotic Index) were used with biodiversity indices in order to evaluate the ecological quality of the Cap Bon peninsula. The general status of the study area is generally satisfactory and slightly polluted, except the inner part of the Sidi Daoud bay (station D and E) where we recorded an extremely polluted status. The first estimate of the genetic diversity populations of Hyalinoecia tubicola and Aponuphis bilineata based on the RAPD data analysis showed that these two species seem to be genetically similar.
format Theses and Dissertations
topic_facet Polychaeta
Annelida
Seasonal variations
Genetic diversity
author Zaabi-Sendi, Sana
author_facet Zaabi-Sendi, Sana
author_sort Zaabi-Sendi, Sana
title Etude faunistique et écologique des annelides polychètes de la côte Nord-Est de la Tunisie (Peninsule du Cap Bon, Mediterranée Ouest)
title_short Etude faunistique et écologique des annelides polychètes de la côte Nord-Est de la Tunisie (Peninsule du Cap Bon, Mediterranée Ouest)
title_full Etude faunistique et écologique des annelides polychètes de la côte Nord-Est de la Tunisie (Peninsule du Cap Bon, Mediterranée Ouest)
title_fullStr Etude faunistique et écologique des annelides polychètes de la côte Nord-Est de la Tunisie (Peninsule du Cap Bon, Mediterranée Ouest)
title_full_unstemmed Etude faunistique et écologique des annelides polychètes de la côte Nord-Est de la Tunisie (Peninsule du Cap Bon, Mediterranée Ouest)
title_sort etude faunistique et écologique des annelides polychètes de la côte nord-est de la tunisie (peninsule du cap bon, mediterranée ouest)
publishDate 2013
url http://hdl.handle.net/1834/5480
work_keys_str_mv AT zaabisendisana etudefaunistiqueetecologiquedesannelidespolychetesdelacotenordestdelatunisiepeninsuleducapbonmediterraneeouest
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spelling dig-aquadocs-1834-54802021-05-19T06:21:23Z Etude faunistique et écologique des annelides polychètes de la côte Nord-Est de la Tunisie (Peninsule du Cap Bon, Mediterranée Ouest) Zaabi-Sendi, Sana Polychaeta Annelida Seasonal variations Genetic diversity The polychaetes communities structure and functioning of the Cap Bon peninsula (Northeast coast of Tunisia), were analyzed from 52 stations from Sidi Daoud to Menzel Horr. The faunistic study reveals the presence of 238 polychaetes species among which 86 records are newly reported for the Tunisian coasts. The total number of polychaetes listed in Tunisia rises to 375 species. The polychaete community structure at the sites was examined by multivariate methods. five main polychaetes communities were identified in the study area, the sandy sediment community (SS), the muddy sediments community (SV), the coarse sediment community (SG), the fine-muddy sediment community (SFV) and the Heterogeneous sediments community (HS). These communities are distributed mainly according to the particle size sediment and the Sampling depth. The SS community characterized by the dominance of Eunice vittata and the SG community dominated by Aponuphis fauveli showed the greatest number of species and diversity. Aponuphis fauveli, Eunice vittata and Protodorvillea kefersteini were the dominant species in the area. The particle size sediment and the sampling depth are also the main factors that govern the seasonal distribution of the polychaete communities in the Sidi Daoud-Ras Lahmer zone. Monitoring reveals that summer and winter seasons showed the highest values of density and diversity. The Cap Bon peninsula as a coastal zone is exposed to increasing anthropogenic activities, such as urban and industrial discharges and terrigenous several wadis. Polychaetes which react differently to this situation constitute an effective biological tool to detect signs of environmental degradation. Ecological groups and the AMBI index (Azti Marine Biotic Index) were used with biodiversity indices in order to evaluate the ecological quality of the Cap Bon peninsula. The general status of the study area is generally satisfactory and slightly polluted, except the inner part of the Sidi Daoud bay (station D and E) where we recorded an extremely polluted status. The first estimate of the genetic diversity populations of Hyalinoecia tubicola and Aponuphis bilineata based on the RAPD data analysis showed that these two species seem to be genetically similar. La structure et le fonctionnement des communautés d’Annélides polychètes de la péninsule du Cap Bon (côte Nord-Est de la Tunisie), ont été analysés à partir de 52 stations réparties de la région de Sidi Daoud à Menzel Horr. L’étude faunistique révèle la présence de 238 espèces de polychètes dont 86 sont nouvellement signalées pour les côtes Tunisiennes. Le nombre total des Polychètes recensés en Tunisie s’élève alors à 375 espèces. Les analyses multivariées de la composition faunistique des stations a permis d’identifier cinq principaux peuplements de polychètes dans le secteur étudié; le peuplement des sédiments sableux (SS), le peuplement des sédiments vaseux (SV), le peuplement des sédiments grossiers (SG), le peuplement des sédiments fins à envasés (SFV) et le peuplement des sédiments Hétérogènes (SH). Ces peuplements se répartissent essentiellement en fonction de la granulométrie du sédiment et de la bathymétrie des stations prospectées. Le peuplement des SS à Eunice vittata et celui des SG à Aponuphis fauveli sont les plus diversifiés avec la dominance des trois espèces Aponuphis fauveli, Eunice vittata et Protodorvillea kefersteini. La granulométrie du sédiment et la bathymétrie sont aussi les facteurs qui régissent la distribution saisonnière des communautés de polychète révélées dans le secteur Sidi Daoud-Ras Lahmer. Le suivi saisonnier révèle que les saisons estivale et hivernale montrent les valeurs de densités et de diversité les plus élevées. En tant que zone côtière, la péninsule du Cap Bon est exposée aux activités anthropiques croissantes, telles que les rejets urbains et industriels et les apports terrigènes de plusieurs oueds. Les Annélides polychètes, qui réagissent différemment face à cette situation, constituent un outil biologique efficace pour déceler les signes de dégradation du milieu. Le modèle des groupes écologiques et l’indice AMBI (Azti Marine Biotic Index) ont été employés conjointement avec les indices de biodiversité pour évaluer l’état écologique général dans la péninsule. Cet état apparaît globalement satisfaisant et légèrement pollué, à l’exception de la région de Sidi Daoud où on enregistre un état extrêmement pollué dans la partie interne de la baie (station D et E). La première estimation de la diversité génétique des populations de Hyalinoecia tubicola et Aponuphis bilineata, basée sur des analyses de données RAPD, montre que ces deux dernières semblent génétiquement voisines. Submitted Peninsula Community structure Seasonal study 2014-06-03T10:10:13Z 2014-06-03T10:10:13Z 2013 Theses and Dissertations Phd thesis http://hdl.handle.net/1834/5480 fr http://www.oceandocs.org/license 386 Cap Bon, Tunisia

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