Species Of Phaeophyceae Research Articles

Marine algae of the northern Gulf of California : Chlorophyta and Phaeophyceae

The present treatment constitutes a taxonomic study of the green and brown benthic marine algae currently known in the northern Gulf of California. In all, 133 species were found: 4 classes, 7 orders, 13 families, 20 genera, and 63 species of Chlorophyta and 9 orders, 15 families, 26 genera, and 70 species of Phaeophyceae. The systematic account is a guide to the identification of marine algae from the northern Gulf of California, with the accepted name, keys, and descriptions of the orders, families, genera, and species. The date, place, and author(s) of valid publication of each taxon are cited. The current name for each species is given along with its basionym, type locality, synonyms, relevant taxonomic studies, habitat, and distribution in the Gulf of California and in the Pacific Ocean. Illustrations are provided for most species. A remarks section includes additional information on taxonomy, nomenclature, ecology, and/or other problems or facts of interest. In addition to reviewing the taxonomic phycological literature pertinent to the Gulf of California and Pacific Mexico, new records and distribution extensions are given. Four new sections of Sargassum subgen. Sargassum are proposed: S. sect. herporhizum E. Y. Dawson ex J. N. Norris, S. sect. johnstonii E. Y. Dawson ex J. N. Norris, S. sect. lapazeanum E. Y. Dawson ex J. N. Norris, and S. sect. sinicola E. Y. Dawson ex J. N. Norris; five new combinations are made: Desmarestia munda subsp. mexicana (E. Y. Dawson) J. N. Norris, Epicladia condensata (Setchell et N. L. Gardner) J. N. Norris, Epicladia mexicana (Setchell et N. L. Gardner) J. N. Norris, Hincksia bryantii (Setchell et N. L. Gardner) J. N. Norris, and Sargassum sinicola subsp. camouii J. N. Norris et Yensen. One new species, Sporochnus neushulii J. N. Norris, is described.

クロアワビNordotis discus discusへの餌料効果とアイゴSiganus fuscescensの採食程度を考慮した伊勢湾湾口部における褐藻類群落移植種の提案

クロアワビNordotis discus discusへの餌料効果とアイゴSiganus fuscescensの採食程度を考慮した伊勢湾湾口部における褐藻類群落移植種の提案

Marine Benthic Plants of Western Australia’s Shelf-Edge Atolls

One hundred and twenty-one species of marine algae, seagrasses and cyanobacteria are reported from the offshore atolls of northwestern Western Australia (the Rowley Shoals, Scott Reef and Seringapatam Reef). Included are 65 species of Rhodophyta, 40 species of Chlorophyta, nine species of Phaeophyceae, three species of Cyanophyta and four species of seagrasses. This report presents the first detailed account of marine benthic algae from these atolls. Twenty-four species are newly recorded for Western Australia, with four species (Anadyomene wrightii, Rhipilia nigrescens, Ceramium krameri and Zellera tawallina) also newly recorded for Australia.

The marine green and brown algae of Rodrigues (Mauritius, Indian Ocean)

The marine benthic green and brown macroalgae of Rodrigues, collected during an expedition in October 2001, are documented and 18 of the 60 taxa of Chlorophyta (53 species) and 18 species of Phaeophyceae are illustrated. Fifty taxa of green and 12 taxa of brown algae are added to the existing species list of the island. Turf algae and smaller epiphytic species are not or are only sporadically included in this study. All records are listed with bibliographic, biogeographic, taxonomic and nomenclatural comments. Infrageneric identification keys are included. The new combination Caulerpa mexicana var. exposita is proposed and the discovery of a new Udotea species is mentioned. The algal flora of Rodrigues is of a typical Indian Ocean composition but appears to be relatively poor when compared to the nearby island of Mauritius.

A Critical Survey of Seaweed Diversity of Chilika Lake, India

During the last seventy years several studies have been undertaken on different aspects of marine algae from different parts of the Indian coast. The country has a vast coastline of more than 7,000 km, which harbours a large diversity of marine algal species. So far nearly seven hundred seventy species of marine algae have been reported from different parts of the Indian coast, which includes 184 species of Chlorophyceae, 166 species of Phaeophyceae and 420 species of Rhodophyceae (Sahoo et al. 2001). Although systematic studies on marine algal distribution and diversity are known from different coastal provinces of India, not much published information is available about the marine algal flora of Orissa. The state has a coastline of 460 km covering mostly sandy beaches. Sahoo (1989); Sahoo and Vijayraghvan (1986) reported occurrence of Centroceras clavulatum, Chaetomorpha antennina and Herposiphonia tenella from Gopalpur coast of Orissa. Reports of occurrence of some marine algal species have also been reported from Chilika, a brackish water lake in Orissa. Biswas (1932) in his monumental work reported nine different species of seaweeds from different parts of the lake. Parija and Parija (1947) studied the succession of some algae on a rocky island of the lake. Sahu and Adhikary (1999) reported only six marine algal species from some parts of the lake. Out of all these studies only Biswas gave a detailed authentic monograph on algal flora. But since Biswas’s study in 1932, the lake had undergone several ecological changes due to closing of the lake mouth to the sea thus blocking the entry of saline water to the lake. Besides, large-scale aquacultural activities have gone up in the lake during last several years. Eutrification has also caused several problems to the lake along with siltation. All these activities over the years have not only changed the ecological characters of the lake but also its floristic composition. Thus, the present study is an important step to re-evaluate the seaweeds diversity of the lake.

Further connections between the benthic marine algal floras of the northern Arabian Sea and Japan

Identifications made on some recent collections of benthic marine algae from the Sultanate of Oman, northern Arabian Sea, have revealed several new records for this region. A total of eight species, representing five species of Rhodophyceae, two species of Phaeophyceae, and a single species each of Chlorophyceae, are newly reported for Oman. Of particular interest is the fact that these species represent new records for the Indian Ocean, some of which had previously been known from Japan and environs.

Algas marinas bentónicas de Mazatlán, Sinaloa, México

Se llevaron a cabo 4 muestreos de algas marinas bentónicas en 3 localidades de las costas de Mazatlán, Sinaloa, mediante los cuales se determinó la presencia de 124 especies de algas marinas. Se identificaron 7 especies de Cyanophyceae, 72 de Rho­dophyceae, 12 de Phaeophyceae, 7 de Baci-llariophyceae y 26 de Chlorophyceae. Cada especie se acompaña de datos sobre su distribución en el área de estudio, el estado reproductivo, el nivel de marea, el modo, las facies y el epifitismo. Se comparó la diversidad de las especies entre la estación climática de lluvias y la de secas, durante 1971, 1983, 1987 y 1988. Rhodophyceae dominó en términos de diversidad en relación con las 4 clases restantes. La ficoflora de Mazatlán es tropical y es más diversa en la estación de lluvias.

Cyclic condensed metaphosphates and linear polyphosphates in brown and red algae.

The occurrence of linear condensed polyphosphates and cyclic condensed metaphosphates was studied by means of pulse-labeling with 32P-orthophosphate (3--5h) in a number of Phaeophyceae species: Pylaiella litoralis, Ilea fascia, Ectocarpus siliculosus and also Rhodophyceae species: Ceramiumdeslongchampsii, C. rubrum, Rhodomela confervoides, Porphyridium purpureum and P. aerugineum. Two-dimensional cellulose thin layer chromatography revealed that in all species studied 32P-radioactivity was generally present in all oligopolyphosphates containing 2 to 7 phosphate residues, in cyclic metaphosphates (tri-, tetra-, penta- and hexametaphosphates) and in high-molecular-weight condensed phosphates which remained at the starting point. Among the low-molecular-weight condensed inorganic phosphates the trimetaphosphate had a significantly higher specific activity than the other oligophosphates which were separated on the chromatography plates as measured by the direct scanning with a Geiger-Muller counter. The phosphate uptake strongly depends on the internal pool of reserve phosphates of the algae cells. The 32P-orthophosphate incorporation of the cells is low and sluggish when growning in a synthetic medium or in sea water. Accordingly 32P appeared preferentially in the low-molecular-weight fractions of condensed phosphates since the storage phosphates were not yet used. After previous incubation in a P-free culture medium of the algae the 32P was rather rapidly incorporated and was found mostly in the high-molecular-weight condensed phosphates. During MAK-chromatography the high-molecular-weight fractions were eluted together with the nucleic acids (tRNA and DNA) while most of the low-molecular-weight fractions left the column immediately on elution.

The Effect on Photosynthesis in Several Benthic Marine Algae of Pollutants in Tagonoura Port, Suruga Bay

An attempt of indoor experiment has been made to determine the apparent photosynthesis of several benthic marine algae as an indicator of the effect of marine pollution at Tagonoura Port located in the innermost part of Suruga Bay.The materials used in this study were 2 species of Chlorophyceae, 3 species of Phaeophyceae and 6 species of Rhodophyceae.All the plants were collected along the coast of six different localities in Suruga Bay. The experiments were carried out with Differential Gas-Volumeter (Yokohama and Ichimura, 1969) under the conditions of 20°C sea water temperature and 20 klux light intensity.The results obtained are summarized as follows:1) In most species examined photosynthetic activity was apparently inhibited with increase of concentrations of pollutants.2) In only one species, Enteronorpha intestinalis, collected on the coast of two different localities, a strong resistance to high concentration of pollutants was observed, and the rate of photosynthesis at concentration of 25% was approximately 3 times of that at concentration of 0%.3) It can be said that the green algal species of Enteromorpha may be useful for assaying the pollution of sea water.4) Photosynthesis-inhibition in algae such as Sargassum hemiphyllum, Eisenia bicyclis, Gelidiuna amansii and Hypnea japonica from the sublittoral zone was more remarkable than in those such as Ulva pertusa, Scytosiphon lomentarius and Porphyra from the intertidal zone.

Investigations of the marine algae of Nova Scotia.: VI. Some species new to North America

One species of Chlorophyceae, one species of Phaeophyceae, and six species of Rhodophyceae, collected in Nova Scotia, are recorded for the first time from North America.