Marine algae of the Champlain Sea episode near Ottawa

1970 ◽  
Vol 7 (6) ◽  
pp. 1583-1585 ◽  
Author(s):  
W. I. Illman ◽  
J. McLachlan ◽  
T. Edelstein
Keyword(s):  
Marine Algae ◽  
Red Alga ◽  
Plant Pigments ◽  
Single Fragment ◽  
Marine Algal

Examination of a marine algal deposit from the Champlain Sea (10 800 ± 150 y old) found by Mott (1968) revealed that it is composed mainly of well preserved blades of Laminaria. These were associated with another brown species not susceptible of definite identification and a single fragment of a foliose red species, probably Rhodymenia.Filaments of Audouinella membranacea were found in hydroids in the deposit and another small red alga, Acrochaetium identified. The presence of several plant pigments was indicated by chromatographic and spectrographic techniques.

scholarly journals Betaine Yields from Marine Algal Species Utilized in the Preparation of Seaweed Extracts Used in Agriculture

2010 ◽  
Vol 5 (4) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Gerald Blunden ◽  
Peter F. Morse ◽  
Imre Mathe ◽  
Judit Hohmann ◽  
Alan T. Critchley ◽  
...  
Keyword(s):  
Marine Algae ◽  
Algal Species ◽  
First Record ◽  
Commercial Production ◽  
The Other ◽  
Minor Constituent ◽  
Laminaria Digitata ◽  
Seaweed Extracts ◽  
Marine Algal ◽  
A Minor

Ascophyllum nodosum, and to a lesser extent, Laminaria digitata, L. hyperborea and Fucus serratus, are marine algal species utilized in the commercial production of seaweed extracts used in agriculture. Betaines have been shown to be important constituents of these extracts, but there appears to have been no study made on whether there are variations in the betaine contents of these species based on either the place or date of collection. Samples of each of the four species were collected from widely separated areas at different times of the year. Also, in the case of A. nodosum, approximately monthly collections were made from one location. The betaines detected in the various collections of the same species showed little variation, although in the case of A. nodosum, glycinebetaine was found as a minor constituent in some samples, but was not detected in others. Trigonelline was found in all the tested samples of the two Laminaria species; this is, to our knowledge, the first record of this betaine in marine algae. With the exception of trigonelline in the Laminaria species, the betaine yields from the various samples of L. digitata, L. hyperborea and F. serratus showed little variation, regardless of either the place or date of collection. The trigonelline contents of the Laminaria species collected at one location (Finavarra, Ireland), in particular of L. hyperborea, was substantially greater than those from the other places of collection. In the case of A. nodosum, the betaine yields from samples collected at one site (Dale, Pembrokeshire, UK) were significantly higher than those from the other places of collection, which were very similar to each other. There was no clear indication of seasonal variation in betaine yields from A. nodosum.

Tropical Marine Algae. I. New Halogenated Monoterpenes From Chondrococcus hornemannii (Rhodophyta, Gigartinales, Rhizophyllidaceae)

1987 ◽  
Vol 40 (11) ◽  
pp. 1893 ◽  
Author(s):  
JC Coll ◽  
AD Wright
Keyword(s):  
Great Barrier Reef ◽  
Marine Algae ◽  
Spectroscopic Studies ◽  
Red Alga ◽  
Barrier Reef ◽  
Halogenated Monoterpenes

Four linear halogenated monoterpenes: (2Z,6E)-1,8-dichloro-3-chloromethyl-7-methylocta- 2,6-diene (1), (E)-1,2-dibromo-3-chloromethylene-7-methyloct-6-ene (2), (Z)-1-chloro-3-chloromethyl-7-methylocta-2,6-diene (3) and (Z)-1,6-dichloro-3-chloromethyl-7-methylocta-2,7- diene (4), and two epimeric bicyclic monoterpenes (2R*,3(8) E,4S*,6R*)-6-bromo-2-chloro-1,4- oxido-3(8)- ochtodene (5) and (2S*,3(8)E,4S*,6R*)-6-bromo-2-chloro-1,4-oxido-3(8)- ochtodene (6) have been isolated from the red alga Chondrococcus hornernannii collected on the Great Barrier Reef, Australia. The structures were assigned on the basis of 1H and 13C n.m.r. spectroscopic studies, and provide another example of the co-occurrence of cyclized and linear halogenated monoterpenes in the same species.

scholarly journals Marine algae of St. Martin's Island, Bangladesh. XII. New records of red and green algae

1970 ◽  
Vol 40 (1) ◽  
pp. 41-45
Author(s):  
Abdul Aziz ◽  
Md Towhidur Rahman
Keyword(s):  
Key Words ◽  
Green Algae ◽  
Marine Algae ◽  
New Records ◽  
Red Alga ◽  
First Time

Ceramium tenerrimum (G. Martens) Okamura fa, Caulerpa sertularioides fa corymbosa Taylor and Cladophora vagabunda (L.) Hoek from St. Martin’s Island, Bangladesh have been recorded, and described and illustrated for the first time with descriptions and illustrations. Key words: Ceramium; Caulerpa; Cladophora; Red alga; Green algae; Bangladesh DOI: http://dx.doi.org/10.3329/bjb.v40i1.7996 Bangladesh J. Bot. 40(1): 41-45, 2011 (June)

Tropical Marine Algae. IX. A New Sesquiterpenoid Metabolite From the Red Alga Laurencia marianensis

1993 ◽  
Vol 46 (6) ◽  
pp. 933 ◽  
Author(s):  
R Denys ◽  
JC Coll ◽  
BF Bowden
Keyword(s):  
Natural Products ◽  
Marine Algae ◽  
Red Alga ◽  
Natural Products Chemistry ◽  
First Time

An investigation of the natural products chemistry of the red alga Laurencia marianensis Yamada, a species whose chemistry has not previously been described in the literature, yielded the new metabolite 1-[(3′S*,3a′lR*,4′R*,7′S*,7a′S*)-7′-bromo-7a′-methyl-3′-(1′-methylethyl)octahydro-1′H-inden-4′-yl] ethanone (1) and the known metabolites deoxyprepacifenol (2) and pacifenol (3). The full n.m.r. characterization of (2) and (3) is reported for the first time.

Tropical Marine Algae. VIII. The Structural Determination of Novel Sesquiterpenoid Metabolites From the Red Alga .Laurencia majuscula

1992 ◽  
Vol 45 (10) ◽  
pp. 1611 ◽  
Author(s):  
R Denys ◽  
JC Coll ◽  
BF Bowden
Keyword(s):  
Natural Products ◽  
Great Barrier Reef ◽  
Marine Algae ◽  
Structural Type ◽  
Red Alga ◽  
Structural Determination ◽  
Barrier Reef ◽  
Natural Products Chemistry ◽  
Laurencia Majuscula

An investigation of the natural products chemistry of the red alga Laurencia mujuscula from the Great Barrier Reef yielded three novel metabolites, (1), (2) and (3a), possessing a new sesquiterpenoid structural type. Known metabolites (6)-(11) were also isolated and the reassignment of n.m.r. spectral values for (11) is reported.

The shallow sublittoral marine ecology of Aldabra

1971 ◽  
Vol 260 (836) ◽  
pp. 123-171 ◽  
Keyword(s):  
Marine Algae ◽  
Marine Ecology ◽  
Preliminary Treatment ◽  
Algal Flora ◽  
Direct Wave ◽  
Calm Water ◽  
Marine Angiosperms ◽  
Marine Algal ◽  
Pool Area ◽  
Marine Angiosperm

The paper represents a preliminary treatment of the marine ecology of certain areas of the shallow sublittoral, mostly on West Island, on Aldabra. Seaward reefs on West Island are, for this island group, calm water localities. Detailed examinations of profiles, and additional observations, indicate that ‘ zones ’ can be recognized in the shallow sublittoral, but these ‘zones’ are more a function of the nature and physiography of the substrate and of the presence and density of marine Angiosperm vegetation than of the marine algae. Luxuriant marine algal flora is, on the reef-flat, found only in deep pools or channels landward of the ‘reef-ridge’, most commonly in the inner ridge/pool area. These circumstances seem to provide protection from direct wave action, together with adequate depth of water at all times. Similar conditions apparently apply in the area immediately lagoon ward of Western Channels, where a most luxuriant ‘turf’ of marine algae and marine angiosperms was located. The biomass of marine vegetation there was quite outstanding for Aldabra, representing a cover of virtually 100%, with much additional growth of one species over another throughout most of the `turf’ area.

Petersenia palmariae n. sp. (Oomycetes): a pathogenic parasite of the red alga Palmaria mollis (Rhodophyceae)

1985 ◽  
Vol 63 (3) ◽  
pp. 404-408 ◽  
Author(s):  
John P. van der Meer ◽  
Curt M. Pueschel
Keyword(s):  
New Species ◽  
Marine Algae ◽  
Vancouver Island ◽  
Red Alga ◽  
Palmaria Palmata ◽  
Infection Cycle ◽  
Fungal Parasite ◽  
Pathogenic Parasite ◽  
A New Species

Specimens of Palmaria mollis (Setchell and Gardner) van der Meer and Bird collected from Vancouver Island, Canada, were found to harbour a pathogenic fungal parasite. When infected fronds were put into culture, the algal thallus became completely covered with small white lesions. These were most concentrated in young tissue and soon killed the apices of the fronds. The parasite completed approximately one infection cycle per week at 10 °C. It died at temperatures near 15 °C, even though the host remained healthy at 20 °C. The parasite was identified as a species of Petersenia (Oomycetes). It most resembled P. lobata (H. E. Petersen) Sparrow but differed sufficiently in detail to consider it a new species, Petersenia palmariae. The new species does not infect Ceramium rubrum (Hudson) C. Agardh which serves as host for both P. lobata and P. pollagaster, the only other members of the genus known to parasitize marine algae. Nor does it infect Palmaria palmata (L.) O. Kuntze, a species related to the host on which it was discovered, which suggests Petersenia palmariae may be host specific.

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