The Experts below are selected from a list of 3291 Experts worldwide ranked by ideXlab platform
Thierry Thibaut - One of the best experts on this subject based on the ideXlab platform.
-
Cystoseira montagnei J. Agardh and C. spinosa Sauvageau (Phaeophyceae, Sargassaceae): A Taxonomic Reappraisal of Misused Names, with the Proposal of Cystoseira michaelae Verlaque et al. nom. et stat. nov.
Cryptogamie Algologie, 2017Co-Authors: Louiza-nesrine Sellam, Aurelie Blanfuné, Charles-françois Boudouresque, Thierry Thibaut, Chafika Rebzani-zahaf, Marc VerlaqueAbstract:Cystoseira granulata C. Agardh var. turneri Montagne was described by Montagne (1838) from Algeria (southern Mediterranean Sea). Subsequently, Agardh (1842) renamed the taxon as C. montagnei J. Agardh, on the basis of specimens from France and the northern Adriatic (northern Mediterranean Sea) which he believed to be identical to Montagne's taxon. Finally, Sauvageau (1912) described C. spinosa Sauvageau and C. adriatica Sauvageau as nomina nova, to partly accommodate Agardh's and some other authors' concept of C. montagnei. These taxonomic treatments caused confusion regarding the delineation of these taxa and doubts have been raised regarding the taxonomic value of Montagne's taxon, which today is often listed as taxon inquirendum in updated checklists and floras. Since 2014, we have collected near Algiers (Algeria) a species of Cystoseira that formed sparse forests between 10 and 25 m depth. Our specimens perfectly match the original description as well as the syntype material of Montagne's taxon. They are well characterized and distinct from C. montagnei J. Agardh and from all the Cystoseira taxa hitherto described in having: a single axis with young tophules spinose becoming smooth-tuberculate when older; primary branches either slightly compressed with an inconspicuous rib and irregularly alternate in one plane, or cylindrical and branched in all directions, with spaced short spine-like appendages; and conceptacles both intercalary basal, just above the tophule, and terminal on branchlets. Here, we propose Cystoseira michaelae Verlaque et al. nom. et stat. nov. to accommodate Montagne's taxon (Cystoseira granulata C. Agardh var. turneri Montagne) and the lectotypification of the species on the basis of both Montagne's protologue and of an original specimen of Montagne (out of the syntype housed at the Museum National d'Histoire Naturelle de Paris, PC). Cystoseira michaelae seems to be an endemic species restricted to Algeria and northern Tunisia. In addition, C. montagnei J. Agardh is lectotypified on the basis of an original specimen of J.G. Agardh (out of the syntype housed at the Botanical Museum of Lund University, LD). The study of lectotypes of C. spinosa Sauvageau and of its synonym C. adriatica Sauvageau confirmed that they are junior synonyms of C. montagnei J. Agardh.
-
Cystoseira montagnei J. Agardh and C. spinosa Sauvageau (Phaeophyceae, Sargassaceae) : a taxonomic reappraisal of misused names, with the proposal of Cystoseira michaelae Verlaque et al., nom. et stat. nov.
Cryptogamie Algologie, 2017Co-Authors: Louiza-nesrine Sellam, Aurelie Blanfuné, Charles-françois Boudouresque, Thierry Thibaut, Chafika Rebzani-zahaf, Marc VerlaqueAbstract:Cystoseira granulata C. Agardh var. turneri Montagne was described by Montagne (1838) from Algeria (southern Mediterranean Sea). Subsequently, Agardh (1842) renamed the taxon as C. montagnei J. Agardh, on the basis of specimens from France and the northern Adriatic (northern Mediterranean Sea) which he believed to be identical to Montagne's taxon. Finally, Sauvageau (1912) described C. spinosa Sauvageau and C. adriatica Sauvageau as nomina nova, to partly accommodate Agardh's and some other authors' concept of C. montagnei. These taxonomic treatments caused confusion regarding the delineation of these taxa and doubts have been raised regarding the taxonomic value of Montagne's taxon, which today is often listed as taxon inquirendum in updated checklists and floras. Since 2014, we have collected near Algiers (Algeria) a species of Cystoseira that formed sparse forests between 10 and 25 m depth. Our specimens perfectly match the original description as well as the syntype material of Montagne's taxon. They are well characterized and distinct from C. montagnei J. Agardh and from all the Cystoseira taxa hitherto described in having: a single axis with young tophules spinose becoming smooth-tuberculate when older; primary branches either slightly compressed with an inconspicuous rib and irregularly alternate in one plane, or cylindrical and branched in all directions, with spaced short spine-like appendages; and conceptacles both intercalary basal, just above the tophule, and terminal on branchlets. Here, we propose Cystoseira michaelae Verlaque et al. nom. et stat. nov. to accommodate Montagne's taxon (Cystoseira granulata C. Agardh var. turneri Montagne) and the lectotypification of the species on the basis of both Montagne's protologue and of an original specimen of Montagne (out of the syntype housed at the Muséum National d'Histoire Naturelle de Paris, PC). Cystoseira michaelae seems to be an endemic species restricted to Algeria and northern Tunisia. In addition, C. montagnei J. Agardh is lectotypified on the basis of an original specimen of J.G. Agardh (out of the syntype housed at the Botanical Museum of Lund University, LD). The study of lectotypes of C. spinosa Sauvageau and of its synonym C. adriatica Sauvageau confirmed that they are junior synonyms of C. montagnei J. Agardh.
-
The fate of Cystoseira crinita, a forest-forming Fucale (Phaeophyceae, Stramenopiles), in France (North Western Mediterranean Sea)
Estuarine Coastal and Shelf Science, 2016Co-Authors: Aurelie Blanfuné, Charles-françois Boudouresque, Marc Verlaque, Thierry ThibautAbstract:The fate of Cystoseira crinita, a forest-forming Fucale (Phaeophyceae, Stramenopiles), in France (North Western Mediterranean Sea)
-
LOSS OF THE HABITAT-FORMING Cystoseira MEDITERRANEA AT ITS NORTHERN-LIMIT OF DISTRIBUTION IN THE MEDITERRANEAN SEA
European Journal of Phycology, 2015Co-Authors: Thierry Thibaut, Aurelie Blanfuné, Charles-françois Boudouresque, Marc VerlaqueAbstract:LOSS OF THE HABITAT-FORMING Cystoseira MEDITERRANEA AT ITS NORTHERN-LIMIT OF DISTRIBUTION IN THE MEDITERRANEAN SEA
-
Cystoseira CRINITA, A LONG-LIVED HABITAT-FORMING SPECIES: THE FATE OF THE FRENCH MEDITERRANEAN SEA POPULATIONS
European Journal of Phycology, 2015Co-Authors: Aurelie Blanfuné, Charles-françois Boudouresque, Marc Verlaque, Thierry ThibautAbstract:Cystoseira CRINITA, A LONG-LIVED HABITAT-FORMING SPECIES: THE FATE OF THE FRENCH MEDITERRANEAN SEA POPULATIONS
A. Meinesz - One of the best experts on this subject based on the ideXlab platform.
-
First characterization of eight polymorphic microsatellites for Cystoseira amentacea var. stricta (Fucales, Sargassaceae)
Conservation Genetics Resources, 2012Co-Authors: P. Robvieux, Thierry Thibaut, A. Meinesz, Julie Videment, Cecile Ribout, Didier Forcioli, L. BottinAbstract:First characterization of eight polymorphic microsatellites for Cystoseira amentacea var. stricta (Fucales, Sargassaceae)
-
First characterization of eight polymorphic microsatellites for Cystoseira amentacea var. stricta (Fucales, Sargassaceae)
Conservation Genetics Resources, 2012Co-Authors: P. Robvieux, Thierry Thibaut, A. Meinesz, Julie Videment, Cecile Ribout, Didier Forcioli, L. BottinAbstract:Cystoseira amentacea var. stricta (Sargassaceae) is an endemic alga of the Mediterranean Sea. It grows in the upper sublittoral wave-exposed zone and is submitted to various anthropogenic pressures resulting in population fragmentation. In order to assess the genetic diversity and structure of these populations, we developed eight microsatellite markers and validated them on 57 individuals from two populations. With 4–9 alleles per locus, the observed heterozygosity varied between 0.033 and 0.852. We tested cross-amplification of the eight primers on Cystoseira mediterranea, and it was successful for seven of these primers.
-
Suivi de la recolonisation de Cystoseira amentacea var. stricta.
2011Co-Authors: P. Robvieux, Aurelie Blanfuné, A. Meinesz, L. Markovic, L. Bottin, Thierry ThibautAbstract:Suivi de la recolonisation de Cystoseira amentacea var. stricta.
-
ANALYSIS OF THE DIVERSITY AND THE GENETIC STRUCTURE OF Cystoseira AMENTACEA VAR. STRICTA (FUCALES)
Journal of Phycology, 2011Co-Authors: P. Robvieux, Thierry Thibaut, L. Bottin, A. MeineszAbstract:ANALYSIS OF THE DIVERSITY AND THE GENETIC STRUCTURE OF Cystoseira AMENTACEA VAR. STRICTA (FUCALES)
-
Development of a transplantation technique of Cystoseira amentacea var. stricta and Cystoseira compressa
Hydrobiologia, 2007Co-Authors: M. L. Susini, Thierry Thibaut, L. Mangialajo, A. MeineszAbstract:Development of a transplantation technique of Cystoseira amentacea var. stricta and Cystoseira compressa
Marc Verlaque - One of the best experts on this subject based on the ideXlab platform.
-
Cystoseira montagnei J. Agardh and C. spinosa Sauvageau (Phaeophyceae, Sargassaceae): A Taxonomic Reappraisal of Misused Names, with the Proposal of Cystoseira michaelae Verlaque et al. nom. et stat. nov.
Cryptogamie Algologie, 2017Co-Authors: Louiza-nesrine Sellam, Aurelie Blanfuné, Charles-françois Boudouresque, Thierry Thibaut, Chafika Rebzani-zahaf, Marc VerlaqueAbstract:Cystoseira granulata C. Agardh var. turneri Montagne was described by Montagne (1838) from Algeria (southern Mediterranean Sea). Subsequently, Agardh (1842) renamed the taxon as C. montagnei J. Agardh, on the basis of specimens from France and the northern Adriatic (northern Mediterranean Sea) which he believed to be identical to Montagne's taxon. Finally, Sauvageau (1912) described C. spinosa Sauvageau and C. adriatica Sauvageau as nomina nova, to partly accommodate Agardh's and some other authors' concept of C. montagnei. These taxonomic treatments caused confusion regarding the delineation of these taxa and doubts have been raised regarding the taxonomic value of Montagne's taxon, which today is often listed as taxon inquirendum in updated checklists and floras. Since 2014, we have collected near Algiers (Algeria) a species of Cystoseira that formed sparse forests between 10 and 25 m depth. Our specimens perfectly match the original description as well as the syntype material of Montagne's taxon. They are well characterized and distinct from C. montagnei J. Agardh and from all the Cystoseira taxa hitherto described in having: a single axis with young tophules spinose becoming smooth-tuberculate when older; primary branches either slightly compressed with an inconspicuous rib and irregularly alternate in one plane, or cylindrical and branched in all directions, with spaced short spine-like appendages; and conceptacles both intercalary basal, just above the tophule, and terminal on branchlets. Here, we propose Cystoseira michaelae Verlaque et al. nom. et stat. nov. to accommodate Montagne's taxon (Cystoseira granulata C. Agardh var. turneri Montagne) and the lectotypification of the species on the basis of both Montagne's protologue and of an original specimen of Montagne (out of the syntype housed at the Museum National d'Histoire Naturelle de Paris, PC). Cystoseira michaelae seems to be an endemic species restricted to Algeria and northern Tunisia. In addition, C. montagnei J. Agardh is lectotypified on the basis of an original specimen of J.G. Agardh (out of the syntype housed at the Botanical Museum of Lund University, LD). The study of lectotypes of C. spinosa Sauvageau and of its synonym C. adriatica Sauvageau confirmed that they are junior synonyms of C. montagnei J. Agardh.
-
Cystoseira montagnei J. Agardh and C. spinosa Sauvageau (Phaeophyceae, Sargassaceae) : a taxonomic reappraisal of misused names, with the proposal of Cystoseira michaelae Verlaque et al., nom. et stat. nov.
Cryptogamie Algologie, 2017Co-Authors: Louiza-nesrine Sellam, Aurelie Blanfuné, Charles-françois Boudouresque, Thierry Thibaut, Chafika Rebzani-zahaf, Marc VerlaqueAbstract:Cystoseira granulata C. Agardh var. turneri Montagne was described by Montagne (1838) from Algeria (southern Mediterranean Sea). Subsequently, Agardh (1842) renamed the taxon as C. montagnei J. Agardh, on the basis of specimens from France and the northern Adriatic (northern Mediterranean Sea) which he believed to be identical to Montagne's taxon. Finally, Sauvageau (1912) described C. spinosa Sauvageau and C. adriatica Sauvageau as nomina nova, to partly accommodate Agardh's and some other authors' concept of C. montagnei. These taxonomic treatments caused confusion regarding the delineation of these taxa and doubts have been raised regarding the taxonomic value of Montagne's taxon, which today is often listed as taxon inquirendum in updated checklists and floras. Since 2014, we have collected near Algiers (Algeria) a species of Cystoseira that formed sparse forests between 10 and 25 m depth. Our specimens perfectly match the original description as well as the syntype material of Montagne's taxon. They are well characterized and distinct from C. montagnei J. Agardh and from all the Cystoseira taxa hitherto described in having: a single axis with young tophules spinose becoming smooth-tuberculate when older; primary branches either slightly compressed with an inconspicuous rib and irregularly alternate in one plane, or cylindrical and branched in all directions, with spaced short spine-like appendages; and conceptacles both intercalary basal, just above the tophule, and terminal on branchlets. Here, we propose Cystoseira michaelae Verlaque et al. nom. et stat. nov. to accommodate Montagne's taxon (Cystoseira granulata C. Agardh var. turneri Montagne) and the lectotypification of the species on the basis of both Montagne's protologue and of an original specimen of Montagne (out of the syntype housed at the Muséum National d'Histoire Naturelle de Paris, PC). Cystoseira michaelae seems to be an endemic species restricted to Algeria and northern Tunisia. In addition, C. montagnei J. Agardh is lectotypified on the basis of an original specimen of J.G. Agardh (out of the syntype housed at the Botanical Museum of Lund University, LD). The study of lectotypes of C. spinosa Sauvageau and of its synonym C. adriatica Sauvageau confirmed that they are junior synonyms of C. montagnei J. Agardh.
-
The fate of Cystoseira crinita, a forest-forming Fucale (Phaeophyceae, Stramenopiles), in France (North Western Mediterranean Sea)
Estuarine Coastal and Shelf Science, 2016Co-Authors: Aurelie Blanfuné, Charles-françois Boudouresque, Marc Verlaque, Thierry ThibautAbstract:The fate of Cystoseira crinita, a forest-forming Fucale (Phaeophyceae, Stramenopiles), in France (North Western Mediterranean Sea)
-
Cystoseira CRINITA, A LONG-LIVED HABITAT-FORMING SPECIES: THE FATE OF THE FRENCH MEDITERRANEAN SEA POPULATIONS
European Journal of Phycology, 2015Co-Authors: Aurelie Blanfuné, Charles-françois Boudouresque, Marc Verlaque, Thierry ThibautAbstract:Cystoseira CRINITA, A LONG-LIVED HABITAT-FORMING SPECIES: THE FATE OF THE FRENCH MEDITERRANEAN SEA POPULATIONS
-
LOSS OF THE HABITAT-FORMING Cystoseira MEDITERRANEA AT ITS NORTHERN-LIMIT OF DISTRIBUTION IN THE MEDITERRANEAN SEA
European Journal of Phycology, 2015Co-Authors: Thierry Thibaut, Aurelie Blanfuné, Charles-françois Boudouresque, Marc VerlaqueAbstract:LOSS OF THE HABITAT-FORMING Cystoseira MEDITERRANEA AT ITS NORTHERN-LIMIT OF DISTRIBUTION IN THE MEDITERRANEAN SEA
Enric Ballesteros - One of the best experts on this subject based on the ideXlab platform.
-
Seasonal dynamics and annual production of Cystoseira crinita (Fucales: Ochrophyta)-dominated assemblages from the northwestern Mediterranean
Scientia Marina, 2012Co-Authors: Marta Sales, Enric BallesterosAbstract:Algae of the genus Cystoseira are the main engineering species on Mediterranean shallow rocky bottoms. Cystoseira crinita is an endemic species which grows in shallow and rather sheltered environments throughout the entire Mediterranean Sea. In order to investigate its role in structuring benthic assemblages and as a primary producer, three localities were sampled every two months during one year in Menorca (Balearic Islands). The total biomass of Cystoseira crinita -dominated assemblages showed a seasonal pattern mainly due to temporal changes in the biomass of the dominant alga. The assemblages also showed seasonality in their species richness (number of species per sample). Both total biomass and species richness peaked in summer, and their lowest values were recorded in winter. Despite these temporal patterns, C. crinita -dominated assemblages from Menorca showed reduced seasonality compared to C. crinita -dominated assemblages in other areas in the western Mediterranean, as C. crinita specimens kept their branches throughout the entire year. Total annual production of Cystoseira crinita branches and cauloids was around 1230 g dwt m –2 , which is higher than that of other Cystoseira species living in sheltered areas but much lower than that of Cystoseira species growing on exposed shores. Production was highly seasonal, and was highest in spring and null in winter and late summer.
-
Pollution impacts and recovery potential in three species of the genus Cystoseira (Fucales, Heterokontophyta)
Estuarine Coastal and Shelf Science, 2011Co-Authors: Marta Sales, Emma Cebrian, Fiona Tomas, Enric BallesterosAbstract:Macroalgae of the genus Cystoseira are experiencing substantial decline in the Mediterranean Sea, which has been generally attributed to increased pollution. A field experiment was conducted to examine the effects of pollution in three Cystoseira species and to study the recovery potential of Cystoseira populations after water quality improvement. Cystoseira specimens were transplanted from a non-polluted area to two areas displaying different levels of pollution, where the disappearance of Cystoseira stands had been documented. Reduced survival and growth of specimens at the highly polluted area suggested that the disappearance of Cystoseira stands was due to heavy metal pollution. Meanwhile, the healthy state exhibited by specimens transplanted to the slightly polluted area, especially by Cystoseira barbata, indicated that the current water quality in this area was good enough for the recovery of Cystoseira populations. The method used to transplant Cystoseira specimens is suggested as a tool for restoring extinct populations.
-
DNA SEQUENCE DATA DEMONSTRATE THE POLYPHYLY OF THE GENUS Cystoseira AND OTHER SARGASSACEAE GENERA (PHAEOPHYCEAE)
Journal of Phycology, 2010Co-Authors: Stefano G. A. Draisma, Enric Ballesteros, Florence Rousseau, Thierry ThibautAbstract:DNA SEQUENCE DATA DEMONSTRATE THE POLYPHYLY OF THE GENUS Cystoseira AND OTHER SARGASSACEAE GENERA (PHAEOPHYCEAE)
-
DNA sequence data demonstrate the polyphyly of the genus Cystoseira and other sargassaceae genera (Phaeophyceae)
Journal of Phycology, 2010Co-Authors: Stefano G. A. Draisma, Enric Ballesteros, Florence Rousseau, Thierry ThibautAbstract:Phylogenetic relationships in the Sargassaceae were explored using three DNA markers, and the monophyly of its genera was challenged. Nineteen out of 24 currently recognized genera were sampled, representing 63 species. The variable mt23S-tRNA Val intergenic spacer could only be aligned within genera and could not be used to infer intergeneric relationships. The partial mt23S was also useful to delineate genera and was alignable at the family level but provided few informative characters. Analysis of mt23S DNA sequences together with chloroplast-encoded psbA sequences resulted in a better resolved phylogeny. Hormophysa was the first genus to branch off within the Sargassaceae, followed by Myriodesma; then the three genera Caulocystis, Carpoglossum, and Scaberia in unresolved order; and then Acrocarpia. The other taxa studied here were divided over three major clades, but there was no branch support for the monophyly of two of these. The genera Bifurcaria, Cystoseira, Halidrys, and Sargassum appeared polyphyletic. The following taxonomic changes are proposed: a new genus Brassicophycus for Bifurcaria brassicaeformis (Kutzing) E. S. Barton; reinstatement of the genus Sargassopsis for Sargassum decurrens (R. Brown ex Turner) C. Agardh; reinstatement of the genus Sirophysalis for Indo-Pacific Cystoseira trinodis (Forsskal) C. Agardh; reinstatement of the genus Polycladia for the western Indian Ocean species Cystoseira indica (Thivy et Doshi) Mairh, Cystoseira myrica (S. G. Gmelin) C. Agardh, and Acystis heinii Schiffner; and reinstatement of the genus Stephanocystis for the North Pacific Cystoseira species and Halidrys dioica N. L. Gardner. The European Cystoseira species should be split into three genera, but no name changes are proposed yet, because diagnostic characters were found only for the clade including the type species. Some evolutionary trends could be discerned from the mt23S + psbA phylogeny.
-
Shallow Cystoseira (Fucales: Ochrophyta) assemblages thriving in sheltered areas from Menorca (NW Mediterranean): relationships with environmental factors and anthropogenic pressures.
Estuarine Coastal and Shelf Science, 2009Co-Authors: Marta Sales, Enric BallesterosAbstract:Abstract The distribution of Cystoseira species was studied at 103 coves in the island of Menorca (Balearic Islands, NW Mediterranean). Both geomorphological parameters and anthropogenic pressures were considered in order to investigate which were the main environmental factors explaining their distribution. Several factors contributed to explain the composition of Cystoseira assemblages in the sampled coves being coastal morphology, bottom nature, nutrient concentration in seawater and urbanization level of the coast the most important. The relatively high number of Cystoseira species found in Menorca suggested a general high quality of the environment. However, in southern coves the number and abundance of Cystoseira spp. was reduced compared to the northern ones. This pattern seems to be related both to a higher anthropogenic pressure and to a less favourable geomorphology at southern coves. When strong anthropogenic disturbances were present (proximity to harbour areas), coves were completely devoid of Cystoseira specimens. As historical data is available for some of these sites, we can document the disappearance of some Cystoseira species at these coves, which seems to be related to increased pollution levels. However, as the absence of Cystoseira assemblages can also respond to a lack of a suitable geomorphology, their use as bioindicators of water quality needs of a definition of proper reference sites.
M. L. Susini - One of the best experts on this subject based on the ideXlab platform.
-
CHARACTERIZATION OF POPULATION GENETIC STRUCTURE OF Cystoseira AMENTACEA VAR. STRICTA (PHAEOPHYCEAE) IN THE MEDITERRANEAN SEA
Phycologia, 2009Co-Authors: L. Bottin, Julie Videment, M. L. Susini, P. Robvieux, Thierry ThibautAbstract:CHARACTERIZATION OF POPULATION GENETIC STRUCTURE OF Cystoseira AMENTACEA VAR. STRICTA (PHAEOPHYCEAE) IN THE MEDITERRANEAN SEA
-
Development of a transplantation technique of Cystoseira amentacea var. stricta and Cystoseira compressa
Hydrobiologia, 2007Co-Authors: M. L. Susini, Thierry Thibaut, L. Mangialajo, A. MeineszAbstract:Development of a transplantation technique of Cystoseira amentacea var. stricta and Cystoseira compressa
-
Development of a transplantation technique of Cystoseira amentacea var. stricta and Cystoseira compressa
Hydrobiologia, 2007Co-Authors: M. L. Susini, Thierry Thibaut, Luisa Mangialajo, A. MeineszAbstract:On the North-Western Mediterranean coastline, the genus Cystoseira (Fucales) has a key role on upper infralittoral community structure. Cystoseira amentacea var. stricta and C. compressa are the most common superficial Cystoseira species. In this area, the coastline is subjected to a strong anthropogenic pressure which has caused severe Cystoseira population decreases. The present study consists in the development of a cheap and easy to use transplantation technique of C. amentacea var. stricta and C. compressa in order to either restore former natural populations or help their settlement on artificial substrates. The thalli were fixed with epoxy glue in holes made by a drill. The success of the technique was assessed by counting the number of remaining transplanted thalli after 3 weeks, 3 months and 6 months. Results were found encouraging with 75% of survival for both species after 6 months. Moreover fertile fronds were observed on the transplanted thalli showing the harmlessness of the technique.
