BOT-Artigos
http://hdl.handle.net/10347/12324
2024-03-28T14:29:26ZResolving the taxonomy of the Polysiphonia scopulorum complex and the Bryocladia lineage (Rhodomelaceae, Rhodophyta)
http://hdl.handle.net/10347/33120
Resolving the taxonomy of the Polysiphonia scopulorum complex and the Bryocladia lineage (Rhodomelaceae, Rhodophyta)
Díaz Tapia, Pilar; Verbruggen, Heroen
Cryptic diversity is common among marine macroalgae, with molecular tools leading to the discovery of many new species. To assign names to these morphologically similar species, the type and synonyms have to be examined, and if appropriate, new species must be described. The turf-forming red alga Polysiphonia scopulorum was originally described from Rottnest Island, Australia, and subsequently widely reported in tropical and temperate coasts based on morphological identifications. A recent study of molecular species delineation revealed a complex of 12 species in Australia, South Africa, and Europe. These species are placed in a taxonomically unresolved lineage of the tribe Polysiphonieae. The aim of this study was to resolve the genus- and species-level taxonomy of this complex and related species using molecular and morphological information. Three morphologically indistinguishable species of the complex were found at the type locality of P. scopulorum, preventing a straightforward assignment of the name to any of the molecular lineages. Therefore, we propose a molecularly characterized epitype. Polysiphonia caespitosa is reinstated for the only species found in its type locality in South Africa. We describe seven new species. Only one species of the complex can be morphologically recognized, with the other eight species indistinguishable based on morphometric analysis. The studied complex, together with another seven species currently placed in Polysiphonia and two Bryocladia species, formed a clade distinct from Polysiphonia sensu stricto. Based on observations of Bryocladia cervicornis (the generitype), we describe our seven new species in the genus Bryocladia and transfer another nine species from Polysiphonia to Bryocladia.
2023-01-01T00:00:00ZAportación al conocimiento de las algas marinas bentónicas del litoral comprendido entre el estuario del río Quejo y Punta de la Mesa, Noja, Cantabria, España
http://hdl.handle.net/10347/32809
Aportación al conocimiento de las algas marinas bentónicas del litoral comprendido entre el estuario del río Quejo y Punta de la Mesa, Noja, Cantabria, España
Martínez Gil, Marta; Gallardo, Tomás; Díaz Tapia, Pilar; Bárbara, Ignacio
Se presenta un catálogo de la flora bentónica marina del litoral comprendido entre el estuario del río Quejo y la Punta de Mesa, Noja, Cantabria. Se aportan datos sobre el hábitat y estado reproductor de los taxones observados. El total de especies identificadas es de 146, de las cuales 95 corresponden a las Rodófitas (65%), 18 a las Clorófitas (12%) y 33 a las Feofíceas (23%). Consideramos que 20 especies (Pterocladiella melanoidea, Bonnemaisonia clavata en su fase esporofítica (Trailliella intricata), Phyllophora sicula, Gastroclonium reflexum, Aglaothamnion feldmanniae, Callithamnion corymbosum, Centroceras clavulatum, Ptilothamnion sphaericum, Drachiella minuta, Polysiphonia nigra, Polysiphonia scopulorum, Polysiphonia stricta, Streblocladia collabens, Cladophora albida, Codium decorticatum, Acinetospora crinita, Ectocarpus siliculosus, Zanardinia typus, Phyllariopsis brevipes subsp. pseudopurpurascens y Sargassum vulgare) son nuevas citas para la flora de Cantabria. Además 17 especies son segundas citas.; A benthic marine algae catalogue from Noja, Cantabria is provided, including reproductive and habitat data of the distinct taxa. The total amount of species is 146, 95 of them are Rhodophyta (65%), 18 Chlorophyta (12%) and 33 Heterokontophyta (23%). We consider that 20 species (Pterocladiella melanoidea, Bonnemaisonia clavata (Trailliella intricata), Phyllophora sicula, Gastroclonium reflexum, Aglaothamnion feldmanniae, Callithamnion corymbosum, Centroceras clavulatum, Ptilothamnion sphaericum, Drachiella minuta,
Polysiphonia nigra, Polysiphonia scopulorum, Polysiphonia stricta, Streblocladia collabens, Cladophora albida, Codium decorticatum, Acinetospora crinita, Ectocarpus siliculosus, Zanardinia typus, Phyllariopsis brevipes subsp. pseudopurpurascens and Sargassum vulgare)
are new records for Cantabria. Moreover, 17 species are second records
2007-11-27T00:00:00ZChecklist of benthic marine algae and cyanobacteria of northern Portugal
http://hdl.handle.net/10347/32804
Checklist of benthic marine algae and cyanobacteria of northern Portugal
Araújo, Rita; Bárbara, Ignacio; Tibaldo, Marta; Berecibar, Estíbaliz; Díaz Tapia, Pilar; Pereira, Rui; Pinto, Isabel Sousa
The northern Portuguese coast is a biogeographic transition zone where many macroalgal species have their distribution limits; it is thus a particularly interesting region for investigating species distribution shifts. An updated and complete list of species for this region is not available in spite of its baseline importance for comparative studies with past and present data. Based on new records, literature references, and herbarium data, we provide an updated checklist of the benthic marine algae of the northern Portuguese coast. This checklist includes 346 species: 26 Cyanobacteria, 200 Rhodophyta, 70 Ochrophyta, and 50 Chlorophyta. From these, 21 species are new records for the Portuguese coast (Lyngbya aestuarii, Lyngbya semiplena, Microcoleus acutirostris, Myxosarcina gloeocapsoides, Aiolocolax pulchella, Antithamnion densum, Antithamnion villosum, Antithamnionella spirographidis, Dasya sessilis, Furcellaria lumbricalis, Neosiphonia harveyi, Porphyrostromium boryanum, Chorda filum, Dictyopteris ambigua, Sphacelaria rigidula, Undaria pinnatifida, Vaucheria coronata, Vaucheria velutina, Ulothrix implexa, Ulva scandinavica, and Umbraulva olivascens) and 33 were recorded for the first time in the north of Portugal. Alien species have increased in number and extended their distribution range over the last 10 years in the study area. Distribution shifts of northern cold water species with southern distribution limit in the north of Portugal were not consistent among species.
2009-02-01T00:00:00ZIberian intertidal turf assemblages dominated by Erythroglossum lusitanicum (Ceramiales, Rhodophyta): structure, temporal dynamics, and phenology
http://hdl.handle.net/10347/32801
Iberian intertidal turf assemblages dominated by Erythroglossum lusitanicum (Ceramiales, Rhodophyta): structure, temporal dynamics, and phenology
Díaz Tapia, Pilar; Bárbara, Ignacio; Barreiro, Rodolfo
Erythroglossum lusitanicum is a foliose, turf-forming member of the Delesseriaceae that colonizes sand-covered intertidal rocks on the Atlantic Iberian Peninsula. We examined (i) the phenology of this alga and (ii) the structure and temporal dynamics of its associated fl ora at two sites over one year. Species diversity was low in the assemblage, which was dominated by E. lusitanicum. Assemblage structure was essentially constant through the year. There were, however, significant differences in E. lusitanicum characteristics between the two sites. At one, E. lusitanicum was more abundant, thalli were longer and wider, and the proportion of plants with tetrasporangia was higher than at the second location. At the first site, the phenological traits tracked a temporal cycle. Thallus length and blade width were highest in April; after gradual deterioration of the apical portions of the plants, individual sizes reached minimum values in July. Subsequently, individual growth rate was low and plant length was nearly constant from September to February. Tetrasporangia were common throughout most of the year; only in July they were totally absent. Temperature and daylength were inversely related to reproduction. Sexual reproductive structures were not observed. The abundant growth of basal proliferations suggests that vegetative propagation very probably plays an important role in the maintenance of E. lusitanicum populations.
2011-12-11T00:00:00Z