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- A New Crustose Species of Phymatolithon (Hapalidiales, Corallinophycidae) From The Mediterranean Sea (Abu Qir, Egypt)?Publication . Kittle III, Ronald Paul; Richards, Joseph; Nguyen, A.; Gabriel, Daniela; Sauvage, Thomas; Schmidt, William E.; Fredericq, SuzannePhymatolithon is one of the most studied and ecologically important crustose coralline algae (CCA) because of their dominance in various marine ecosystems worldwide. The taxonomic history of the genus has been complex, and the genus has been revised multiple times on the basis of morphological and molecular analyses.
- Got Talent: Peyssonnelia globally showcases its skillsPublication . Gabriel, Daniela; Krayesky, David; Norris, James N.; Schmidt, William E.; Schils, Tom; Fredericq, SuzanneABSTRACT: The crust forming genus Peyssonnelia Decaisne is a taxon of great ecological importance, with some species involved in the establishment of rhodoliths. Comparative morphological and molecular analyses demonstrate a greater diversity of peyssonnelioid species than was previously reported. In chloroplast-encoded rbcL-based trees, species referred to as Peyssonnelia in the literature do not group together, but are scattered among other genera that were not currently placed in the Peyssonneliaceae. Two recently reported genera for the Gulf of Mexico, “ Polystrata” and Metapeyssonnelia, were excluded from the family, and together with a third clade are nested inside the Rhizophyllidaceae of the Dumontiaceae-complex. The Rhizophyllidaceae is newly reported for the Gulf of Mexico, with six species. The number of distinct species of Peyssonneliaceae now present in the Gulf of Mexico has increased from 6 to 21. On the other hand, the number of Peyssonnelia reported for the Azores was reduced from five to one species. Some species placed in Cruoriella and Cruoriopsis actually belong in the Peyssonneliaceae. New combinations are being proposed to accommodate known and new species in Cruoriella, and in two formerly monotypic genera, Sonderophycus and Riquetophycus. The Peyssonneliaceae forms a monophyletic assemblage that could not be maintained in the Gigartinales and thus a new order was constituted, Peyssonneliales, unrelated to the cluster of families centred around the Halymeniaceae of the Halymeniales, or the Gigartinaceae of the Gigartinales.
- A Rhapsody of new Red Algal Records in ThailandPublication . Draisma, Stefano; Muangmai, Narongrit; Gabriel, DanielaABSTRACT: Recent explorations in Thai waters have resulted in the discovery of red algae that represents new records for the Thai seaweed flora, including species putatively new to science. Preliminary identifications are primarily based on newly generated DNA-sequence data (COI, rbcL, rDNA LSU, UPA) that were compared to genetic sequences in public databases and unpublished datasets. New genus records for Thailand include the genera Cryptocallis and Sebdenia (Sebdeniaceae, Sebdeniales), Agissea, Brasilophycus and Incendia (Peyssonneliaceae, Peyssonneliales), Dipterocladia (Delesseriaceae, Ceramiales), Dudresnaya (Dumontiaceae, Gigartinales), Grateloupia and Yonagunia (Grateloupiaceae, Halymeniales), and Predaea (Nemastomataceae, Nemastomatales). New species records for previously reported genera in Thailand were found in the genera Dissimularia(Chondrymeniaceae, Gigartinales), Halymenia(Halymeniaceae, Halymeniales), Renouxiaand Rhodogorgon (Rhodogorgonaceae, Rhodogorgonales), Titanophora (Schizymeniaceae, Nemastomatales), and possibly Halichrysis (Rhodymeniaceae, Rhodymeniales). The new records in Dipterocladia, Halymenia, Rhodogorgon, and Peyssonneliaceae may represent undescribed species. Naming the Titanophora and Predaea species remains a challenge. It is not clear whether the recent new records represent recent arrivals or that these taxa have been overlooked in earlier surveys. It is possible that some taxa were previously recorded under a misapplied name.
- Expert knowledge-based co-development of scenarios for maritime spatial planning in the Northeast AtlanticPublication . Calado, Helena; Pegorelli, Camila; Vergílio, Marta H. S.; Hipólito, Cláudia; Campos, Aldino; Moniz, Fabiana; Costa, Ana Cristina; Silva, C. Pereira da; Fonseca, Catarina; Santos, C. Frazão; Gabriel, Daniela; Guerreiro, J.; Gil, Artur José Freire; Johnson, David; Ng, Kiat; Monwar, M. M.; Ventura, Maria A.; Suárez-de Vivero, J. L.; Pinho, Mário Rui; Borges, Paulo Jorge Soares de Amaral; Caña-Varona, Mario; Papaioannou, E. A.Scenarios constitute narratives or storylines that reasonably describe how the future is likely to unfold. The usefulness of scenarios in Maritime Spatial Planning (MSP) is now recognised within policy and research, with many institutions urging the development of likely trajectories in the future state of the marine environment and space. However, little progress exists in the actual development and application of actual scenario building approaches. This paper presents the methodology and results of such an approach developed within the framework of the “Geographical and Political Scenarios in Maritime Spatial Planning for the Azores and North Atlantic (GPS Azores)” project. A scenario-building approach for MSP in the area is developed and future scenarios’ storylines are formulated through the active engagement of regional experts. Outcomes from the analysis enable identifying the major risks and opportunities in the management and use of marine space and key maritime sectors, under different scenarios. Three storylines are developed representing distinct trajectories in the use and governance of marine space: (i) Nature at Work; (ii) Business-as-usual; and (iii) Blue Development. Final storylines are the outcome of intense experts’ engagement throughout the scenario-building exercise, stressing the usefulness of such participative approaches. Results can assist policymakers in the context of an adaptive and participatory MSP approach. The methodology can be tailored to other regions, while results can be revisited and adapted as new information and knowledge emerge.
- Genetic diversity of Gibsmithia hawaiiensis complex (Dumontiaceae, Rhodophyta): Molecular phylogeny, taxonomic characterization, and the proposal of new speciesPublication . Gabriel, Daniela; Draisma, Stefano; Sauvage, Thomas; Schmidt, William; Fredericq, SuzanneABSTRACT: The genus Gibsmithia was erected on the basis of G. hawaiiensis Doty 1963 from the Hawaiian archipelago to accommodate a species of red algae in the Dumontiaceae consisting of clusters of gelatinous lobes growing from a cartilaginous stalk. Three additional species were subsequently described from Australia, i.e. G. dotyi Kraft & R.W. Ricker 1984, G. larkumii Kraft 1986 and G. womersleyi Kraft & Ricker ex Kraft 1986. Records of Gibsmithia have been reported from different localities throughout the Indian Ocean and the central and western Pacific, with G. hawaiiensis acknowledged as having the widest geographic distribution. Gibsmithia hawaiiensis can be easily distinguished from the other species in the genus by the presence of abundantcortical filaments extending the frond's surface giving the specimens a furry appearance. Based on new subtidal collections and existing herbarium specimens, a study was conducted on the genetic diversity of specimens identified as G. hawaiiensis. The three genetic markers employed (COI, rbcL and UPA) revealed the existence of a species-complex comprising two major lineages, with genetically distinct species. The Gibsmithia hawaiiensis complex exhibits high genetic diversity in the Indo-Malay region, with one lineage distributed throughout the E Indian Ocean and the W Pacific, and a widespread second lineage collected from East Africa to French Polynesia. In contrast, low genetic diversity characterizes members from isolated regions as the Hawaiian archipelago and the semi-closed Red Sea. The high divergence associated with poor resolution observed in geographically widespread lineages obscures species boundaries. The generitype and two new species forming the Gibsmithia hawaiiensis complex can be distinguished on the basis of anatomical characters that were previously regarded as morphological plasticity within G. hawaiiensis. Additional studies are underway to assess the large-scale phylogenetic and biogeographic patterns in Gibsmithia.
- The red algal genus Titanophora (Schizymeniaceae, Nemastomatales) in the Gulf of MexicoPublication . Gabriel, Daniela; Fredericq, SuzanneABSTRACT: "Titanophora (J. Agardh) Feldmann currently comprises nine species inhabiting tropical and subtropical waters worldwide. The genus is distinguished from other members of the Schizymeniaceae primarily by the calcification of the frond and the presence of an involucre surrounding the carposporophyte. The present study provides a characterization of four distinct Titanophora species that were dredged throughout the Gulf of Mexico. On the basis of comparative vegetative and reproductive morphology and chloroplast-encoded rbcL sequence analysis, a new record for the Gulf, T. submarina Bucher & J.N. Norris, and two species new to science in addition to T. incrustans (J. Agardh) Boergesen are recognized for the region."
- Biodiversity of the Nemastomatales (Rhodophyta): new insights and future perspectivesPublication . Gabriel, Daniela; Neto, Ana I.; Fredericq, SuzanneABSTRACT: The Nemastomatales comprises two families of predominantly gelatinous representatives with heteromorphic life histories, the Nemastomataceae and Schizymeniaceae. Obscure and ephemeral events in the sexual cycle delimit genera in this order, but such phylogenetically informative features have not been confirmed for most species. Newly generated morphological data coupled with DNA sequence analysis inferred from chloroplast-encoded rbcL and nuclear LSU rDNA sequences of gelatinous red algae worldwide reveal that the external habit within select species is remarkably variable and cannot be used to distinguish species. Species reported as having a wide distribution range instead have a restricted distribution. For example, Platoma cyclocolpum (Mont.) Schmitz may be confined to the Macaronesian islands; the taxon going under this name from the Indian Ocean (Madagascar) is instead P. chrysymenioides Gavio et al., a species found throughout the Gulf of Mexico. Schizymenia dubyi (Chauvin ex Duby) J. Ag. described from Atlantic France is also present in Japan, but records of this taxon from the Azores, Namibia and Japan, should be referred to as S. apoda (J. Ag.) J. Ag., a species described from the Cape Province, South Africa. Recent deepwater collections of Predaea and Titanophora throughout the Gulf of Mexico coupled with unreported samples of Nemastomatales from the Azores and Japan are greatly expanding species diversity of the order. A firm biogeographic link between species from the Azores and the Gulf of Mexico and from Australia and the Indian Ocean is here firmly established and will be elaborated upon.
- Barcoding non-indigenous macroalgae in the AzoresPublication . Santos, Rodolfo; Ferreira, Anastasija; Micael, Joana; Costa, Ana Cristina; Gil-Rodriguez, Maria; Machin, Maria; Gabriel, Daniela; Parente, Manuela I.ABSTRACT: Algae invasions in marine habitats represent a recognized worldwide threat to the integrity of native communities, to economy and even to human health. The em phasis of the present work is on non-indigenous marine macroalgae species in the Azores.
- To be or not to be: Will the real Chrysymenia (Rhodymeniaceae, Rhodophyta) please stand up?Publication . Schmidt, William E.; Arakaki, Natalia; Gurgel, Carlos Frederico Deluqui; Gabriel, Daniela; Norris, James N.; Ballantine, David; Fredericq, SuzanneABSTRACT: The genera in the Rhodymeniaceae that have a hollow thallus lacking diaphragms comprise Chrysymenia J. Agardh (including Gloiosaccion Harvey), Botryocladia (Agardh) Kylin and Irvinea Guiry. Chrysymenia has traditionally been defined by a lack of internal rhizoids and with the only solid portion of the thallus limited to the stipe, and Botryocladia is characterized by the presence of larger, solid axes.
- Re-visiting Vila do Porto marina (Santa Maria, Azores archipelago)Publication . Micael, Joana; Parente, Manuela I.; Gabriel, Daniela; Costa, Ana CristinaABSTRACT: Harbours and marinas are important places of introduction and spread of non-native organisms, due to local, regional and international shipping activities, both commercial and recreational. Moreover, marina infrastructures are an increasingly common form of artificial habitat, which is likely to increase the recruitment of organisms relative to natural shores. The association of marine wildlife with artificial structures represents, generally, a preliminary indicator of the colonization status of invasive species. Santa Maria island is located in the Eastern Group of the Azores and is the southernmost island of the archipelago.
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