Related Papers
Journal of Phycology
Phylogenetic Analysis of the Marine and Freshwater Thalas‐Siosiroid Diatoms
2000 •
Matthew Julius
Journal of Phycology
Marine Macroalgal Diversity in the Republic of Panama
2000 •
Wiebe Kooistra
Journal of Phycology
Preliminary Evaluation of the Bioremediation Potential of Porphyra : Photosynthetic Production by Blades and Conchocelis
Journal of Phycology
The Pinguiophyceae Classis Nova, Chromophyte Algae Producing Large Amounts of OMEGA‐3 Fatty Acids
2000 •
Robert Bidigare
A new class of algae is proposed for a small group of unusual chromophytes (=heterokont algae). One novel aspect of these organisms is that cells contain large amounts of polyunsaturated fatty acids (41 – 67% of fatty acids), with exceptionally high amounts of EPA (21 – 56% of fatty acids). A second unusual character is that, for at least two genera, the mature flagellum (short, smooth flagellum of other chromophytes) is dominant, and the immature flagellum (long, hairy flagellum of other chromophytes) lacks tripartite hairs and is reduced in size or even absent. Carotenoid analysis shows that the class is characterized by the presence of chlorophylls a and c, fucoxanthin, violaxanthin, antheraxanthin, zeaxanthin, and β‐carotene. The 18S rRNA and rbcL gene sequences show that these organisms form a monophyletic group that is supported by very high bootstrap values. The phylogenetic relationships of the Pinguiophyceae and other classes are not well resolved, however, the relationship...
Journal of Phycology
Characterization of the Offshore Marine Macroalgae from the Northwestern Gulf of Mexico Hard Bank Communities
2000 •
Naomi Phillips
The upper northwestern Gulf basin is characterized by a relatively shallow but well‐developed continental shelf with an extensive system of mid‐ and outer shelf hard banks of varying origin and composition. Observations done by our laboratory while participating in monitoring cruises to the National Marine Sanctuaries of the East and West Banks of the Texas Flower Gardens, Stetson Banks (TX) and Sonnier Banks (LA) reveal a surprisingly different floristic composition among the sites. Several range extensions, new macro‐algal records for the Gulf of Mexico, and new species imply a much more complex Algal Zone community than the one proposed by Rezak et al. (1985). Our ongoing project includes the development of a modern taxonomic, phylogenetic, morphological and genetic database essential to informed management for preservation of biological diversity. It also provides a framework of seasonal algal composition against which long‐term trends and anomalies in algal distribution and hea...
Journal of Phycology
Temporal and Spatial Production of Agglutinins in Marine Macroalgae from the Mexican Caribbean
2000 •
Sergio Alvarez-Hernández
Journal of Phycology
Temperature Induced Photoinhibition in Outdoor Cultures of Monodus Subterraneus
2000 •
Sammy Boussiba
Outdoor algal cultures are continuously exposed to changes in environmental conditions, particularly irradiance and temperature. While the changes in light intensity take place in a range of one to two hours, the increase in temperature is a slower process and takes about four to five hours. This de‐synchronization between the two important environmental factors governing photosynthesis and growth of algae results in a unique stress condition where photoinhibition can be induced at relatively low light intensity. Outdoors the early morning culture temperature was found to be about 12 to 14° C, and reaches 25 to 28° C at mid‐day. In an experiment, such a natural temperature regime was compared to another one in which the morning temperature of the culture was increased to 20° C by using a heating system. A fast decline in the maximal photochemical efficiency of PSII (Fv/Fm) was observed starting as soon as sunrise. The decline was faster in the non‐heated culture and was to a lower v...
Journal of Phycology
Diatoms as Hosts for Other Diatoms: Observations from Southern California
2000 •
Carina Lange
Large epiphytic and epilithic diatom species hosting other diatoms were observed in several fresh‐ and brackish water sites in Southern California. The most commonly encountered hosts were species forming long filaments attached to rocks or macroalgae, Hydrosera whampoensis (Schwarz) Hendey, Melosira varians Agardh, Pleurosira laevis (Ehrenberg) Compere and Terpsinoe musica Ehrenberg. These large diatoms often had smaller diatoms attached, usually to the girdle bands and occasionally to the mucilage pads connecting the cells. For example, cells of T. musica were observed supporting growth of a diverse diatom assemblage composed of species of the genera Achnanthes, Achnanthidium, Amphora, Cocconeis and Tabularia; Synedra sp. was attached to M. varians and B. paxillifer; and Cocconeis placentula was seen on H. whampoensis. Thus, large epiphytic and epilithic diatoms seem to provide suitable sites for attachment of small epiphytic diatom species, and it appears that this phenomenon is ...
Journal of Phycology
The Phylogenetic Relationships of the Phaeothamniophyceae, with Comments on Certain Capsoid Members of the Chrysophyceae
2000 •
N. Daugbjerg, R. Andersen
Journal of Phycology
Microscopic Investigations of Strombomonas with Special Reference to Release from the Lorica Following Cell Division
2000 •
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