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Search Results: 1 - 10 of 4205 matches for " Aguilar-Rosas "
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Presencia simultánea de las fases tetraspororangial y carposporangial sobre el mismo talo en Polysiphonia scopulorum var. villum (Rhodomelaceae, Rhodophyta)
Aguilar-Rosas, Raúl;Aguilar-Rosas, Luis E.;
Revista mexicana de biodiversidad , 2010,
Abstract: mixed tetrasporangial (tetrasporangia) and carposporangial (cistocarps) phases on the same thallus in polysiphonia scopulorum w.h. harvey var. villum (j. agardh) hollenberg (rhodomelaceae, rhodophyta) are described for the first time. the material was collected on octuber, 2004 in the intertidal zone in playa saldamando, baja california, mexico.
Presencia simultánea de las fases tetraspororangial y carposporangial sobre el mismo talo en Polysiphonia scopulorum var. villum (Rhodomelaceae, Rhodophyta) Mixed phases tetrasporangial and carposporangial on the same thallus in Polysiphonia scopulorum var. villum (Rhodomelaceae, Rhodophyta)
Raúl Aguilar-Rosas,Luis E. Aguilar-Rosas
Revista mexicana de biodiversidad , 2010,
Abstract: Se describe por primera vez la presencia simultánea de las fases tetrasporangial (tetrasporangios) y carposporangial (cistocarpos) sobre el mismo talo en Polysiphonia scopulorum W.H. Harvey var. villum (J. Agardh) Hollenberg. El material fue recolectado en la zona intermareal rocosa de Playa Saldamando, Baja California, México, durante octubre de 2004. Mixed tetrasporangial (tetrasporangia) and carposporangial (cistocarps) phases on the same thallus in Polysiphonia scopulorum W.H. Harvey var. villum (J. Agardh) Hollenberg (Rhodomelaceae, Rhodophyta) are described for the first time. The material was collected on Octuber, 2004 in the intertidal zone in Playa Saldamando, Baja California, Mexico.
Occurrence and Distribution of the Genus Jania J. V. Lamouroux (Corallinales, Rhodophyta) in the Pacific Coast of Baja California and Gulf of California, Mexico  [PDF]
Luz Elena Mateo-Cid, A. Catalina Mendoza-González, Luis E. Aguilar-Rosas, Raúl Aguilar-Rosas
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.412A2001
Abstract:

This paper provides a description of the articulated species of the Tribe Janieae (Corallinales, Rhodophyta) in the Pacific coast of Baja California and Gulf of California, Mexico. This taxonomic report is based on newly collected data in the study area and material currently housed at several herbaria. As a result of the present study, the record of the tribe Janieae is represented at the Pacific coast of Mexico for one genus: Jania J. V. Lamouroux with nine species. Morphological, reproductive and anatomical descriptions are provided in detail. In addition, keys for determination are included, as well as habitat, nomenclature, comparisons with other species and information on distribution. Instead of eleven species of Jania currently recorded for the study area, we recognize only nine. Jania verrucosa is restricted to the occidental coast from the Peninsula of Baja California. The remainder of the species commonly occurs in the Gulf of California and the Pacific coast of Baja California’s Peninsula. On the other hand, the gametangial thalli of J. adhaerens and tetrasporangial conceptacle in J. longiarthra are reported for the first time in Mexico.

Descripción de talos espermatangiales y combinación de fases en Polysiphonia confusa (Rhodomelaceae, Rhodophycota)
Aguilar-Rosas, Raúl;Aguilar-Rosas, Luis E.;Pedroche, Francisco F.;
Revista mexicana de biodiversidad , 2006,
Abstract: the spermatangial phase and the mixed phases (tetrasporangia and cystocarps) on the same thallus in polysiphonia confusa hollenberg (rhodomelaceae, rhodophycota) are described for the first time. spermatangial thalli are important to characterize and compare this species with others from the genus polysiphonia. habit, vegetative and reproductive development have been examined in plants of this species from the intertidal zone of saldamando beach, baja california, méxico. because of its small size, this species has been overlooked in the mexican pacific coast resulting in a small numbre of records for this taxon.
Descripción de talos espermatangiales y combinación de fases en Polysiphonia confusa (Rhodomelaceae, Rhodophycota) Description of spermatangial thalli and mixed-phase in Polysiphonia confusa (Rhodomelaceae, Rhodophycota)
Raúl Aguilar-Rosas,Luis E. Aguilar-Rosas,Francisco F. Pedroche
Revista mexicana de biodiversidad , 2006,
Abstract: Se describen por primera vez los talos espermatangiales, estadio que permite comparar y asociar a Polysiphonia confusa Hollenberg (Rhodomelaceae, Rhodophycota) con otras especies del género Polysiphonia. También se registra la presencia simultanea de las fases tetrasporangial y carposporangial en P. confusa. Se estudió el hábito, la morfología vegetativa y reproductora de P. confusa recolectada en la zona intermareal rocosa de Playa Saldamando, Baja California, México. El tama o peque o de esta especie puede justificar el número reducido de citas de este taxon para la costa del Pacífico de México. The spermatangial phase and the mixed phases (tetrasporangia and cystocarps) on the same thallus in Polysiphonia confusa Hollenberg (Rhodomelaceae, Rhodophycota) are described for the first time. Spermatangial thalli are important to characterize and compare this species with others from the genus Polysiphonia. Habit, vegetative and reproductive development have been examined in plants of this species from the intertidal zone of Saldamando Beach, Baja California, México. Because of its small size, this species has been overlooked in the Mexican Pacific coast resulting in a small numbre of records for this taxon.
Morfología y distribución de Porphyra hollenbergii (Bangiaceae, Rhodophyta) en la costa del Pacífico de México Morphology and distribution of Porphyra hollenbergii (Bangiaceae, Rhodophyta) in the Pacific coast of México
R Aguilar-Rosas,L. E Aguilar-Rosas,I Sánchez-Rodríguez,J. E Broom
Revista mexicana de biodiversidad , 2007,
Abstract: Resumen Se registra la presencia y estacionalidad de Porphyra hollenbergii (Bangiaceae, Rhodophyta) para la costa del Pacífico de México, con base en material recolectado durante el periodo de enero a mayo del 2003 y un análisis de ejemplares depositados en herbarios nacionales y extranjeros. Se describen en forma detallada los caracteres morfológicos y reproductores de los talos, así como su hábitat y distribución geográfica en el área de estudio. La estacionalidad de la fase macroscópica de P. hollenbergii comprende de febrero a mayo (invierno-primavera). Occurrence and seasonality of Porphyra hollenbergii (Bangiaceae, Rhodophyta) is reported for the Pacific coast of Mexico, based on sampling conducted in 2003 and those deposited in national and foreign herbarium. We describe details of morphology and reproductive characters of the thallus, as well as its habitat and geographic distribution. We determined that P. hollenbergii is a seasonal species in its macroscopic phase from February to May (winter - spring).
Macroalgas submareales de la bahía de Todos Santos, Baja California, México Submareal macroalgae of the Todos Santos Bay, Baja California, Mexico
Raúl Aguilar-Rosas,Luis E. Aguilar-Rosas,Guillermo E. ávila Serrano,óscar González Yajimovich
Revista mexicana de biodiversidad , 2010,
Abstract: Con el fin de identificar y caracterizar la composición de especies de la zona submareal de la bahía de Todos Santos, Baja California, México; se realizaron muestreos de macroalgas marinas bentónicas en 7 sitios durante 1995-2000. Como resultado de 25 buceos Scuba entre 3 y 33 m de profundidad se encontraron 150 especies de macroalgas para el área de estudio; 10 son Chlorophyta, 26 Phaeophyta y 114 Rhodophyta. Del total, 47 son registros nuevos para el área de estudio y 2 de éstos, Faucheocolax attenuata Setchell y Minium parvum R.L. Moe, son nuevos para la flora marina del Pacífico de México. Se incluye una revisión de las investigaciones en las que se han considerado las macroalgas presentes en la bahía de Todos Santos y una discusión sobre la composición de las especies encontradas, su distribución vertical y reproducción, así como sobre las especies epífitas y parásitas del área. In order to identify and characterize the species composition of the subtidal zone of the Todos Santos Bay, Baja California, Mexico, benthic marine macroalgae were sampled at 7 sites from 1995 to 2000. As a result of 25 scuba at derds for the study area, of which Faucheocolax attenuata Setchell and R.L Moe Minium parvum are new to the marine flora of Pacific Mexico. We include a research that consider the macroalpths between 3 and 33 m we found a total of 150 species of macroalgae for the study area, of which 10 are Chlorophyta, 26 Phaeophyta and 114 Rhodophyta; 47 species represent new recogae in the Todos Santos Bay and a discussion on the composition of species found, its vertical distribution and reproduction, particularly the species epiphytes and parasites present in the study area.
Presence of Sargassum horneri at Todos Santos Bay, Baja California, Mexico: Its Effects on the Local Macroalgae Community  [PDF]
Giuliana I. Cruz-Trejo, Silvia E. Ibarra-Obando, Luis E. Aguilar-Rosas, Miriam Poumian-Tapia, Elena Solana-Arellano
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.617271
Abstract: To describe the annual cycle of Sargassum horneri in Mexican waters, we selected two sites differing in their degree of wave exposure and sediment type: Rincón de Ballenas (RB), and Rancho Packard (RP). From June 2009 to April 2010 we followed the seasonal changes in S. horneri density and biomass along two intertidal transects per site. The effects of this non-indigenous species on the local macroalgae community were assessed by comparing their species composition, density, biomass, species richness, and diversity index in quadrats with and without S. horneri. There were significant differences in S. horneri density and biomass between sites (P < 0.001). At RB the invasive alga density average was 2 ± 0.94 individual m-2, with a mean biomass of 4 ± 0.95 g DW m-2. At RP, S. horneri density average was 10 ± 0.96 individual m-2, and mean biomass of 102 ± 0.97 g DW m-2. At RB, the invasive alga promoted a significant reduction in the four selected structural variables, and the corticated macrophytes and the foliose functional forms were severely reduced. At RP, there were only marginally significant effects (P = 0.06) of S. horneri presence on the local macroalgae community, and higher density, biomass, and diversity values were found when S. horneri was present. Most of the functional forms were found, even if the invasive alga was present. At both locations, the highest biomass corresponded to the articulated calcareous functional form. These contrasting results could be due to the fact that the native macroalgae community has already been altered by the early invasion of S. muticum, with the most resilient species and functional forms remaining in place. One of the most important changes we noticed is the severe reduction of the canopy forming species at both sites.
Morfología y distribución de Porphyra hollenbergii (Bangiaceae, Rhodophyta) en la costa del Pacífico de México
Aguilar-Rosas, R;Aguilar-Rosas, L. E;Sánchez-Rodríguez, I;Broom, J. E;Nelson, W. A;
Revista mexicana de biodiversidad , 2007,
Abstract: occurrence and seasonality of porphyra hollenbergii (bangiaceae, rhodophyta) is reported for the pacific coast of mexico, based on sampling conducted in 2003 and those deposited in national and foreign herbarium. we describe details of morphology and reproductive characters of the thallus, as well as its habitat and geographic distribution. we determined that p. hollenbergii is a seasonal species in its macroscopic phase from february to may (winter - spring).
Distribución y variación morfológica de Amphiroa beauvoisii (Corallinales, Rhodophyta) en México
Mateo-Cid, Luz Elena;Aguilar-Rosas, Raúl;Mendoza-González, A. Catalina;Aguilar-Rosas, Luis E.;
Revista mexicana de biodiversidad , 2008,
Abstract: several samples of amphiroa beauvoisii (corallinales, rhodophyta) were collected in different localities along the pacific and caribbean coasts of mexican from 1994 to 2007. an extensive review of amphiroa beauvoisii recorded from mexico was carried out. specimens of different herbaria were examined to determine its geographic distribution, as well as morphological and reproductive data for this taxon. analysis of this information showed that this species is distributed along the pacific coast from islas coronados, baja california to la ventosa, oaxaca. a. beauvoisii is frequent in the gulf of california and jalisco, guerrero and oaxaca, while on the atlantic coast it is rare and we only found it on coralline reefs of yucatán and quintana roo. morphological variation, reproductive stage, and distinctive characteristics of this taxon are included. a. beauvoisii is an extremely variable species; the tetrasporangial and bisporangial thalli are more common, more branched and taller that the gametangial plants. we found gametangial and tetrasporangial plants on the pacific coast and only tetrasporangial plants in the caribbean. male and female plants of a. beauvoisii are described for the first time from mexican populations.
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