Dinoflagellate Cysts in Recent Sediments from Bahía Concepción, Gulf of California
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L. Morquecho
Abstract
The composition, abundance, and distribution of dinoflagellate resting cysts in recent sediments were analyzed at 12 sites in Bahía Concepción in the subtropical Gulf of California. Calcareous and organic Peridiniales, Gonyaulacales, and Gymnodiniales were identified at species level (25 cyst types). Empty cysts constituted 75–90% of cysts in the samples. Cyst assemblages were dominated by calcareous Peridiniales (30–70%) and Gonyaulacales (13–44%), represented mainly by Scrippsiella trochoidea and Lingulodinium polyedrum. In the first centimeter of sediment, cyst counts varied from 173 to 9, 933 cysts g−1 wet weight, and increased in abundance in the inner area of the bay. Cysts of the toxic species Gymnodinium catenatum were also detected, and successful cyst germination of Alexandrium margalefii is described. Cyst abundance and distribution patterns suggest that the bay acts as a cyst trap, and that the cyst assemblages reflect the local community of meroplanktonic dinoflagellates.
Copyright © 2003 by Walter de Gruyter GmbH & Co. KG
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Articles in the same Issue
- Comparative Morphology and Taxonomy of Sphacelaria Species with Tribuliform Propagules (Sphacelariales, Phaeophyceae)
- Reproductive Strategies of Ceramium tenuicorne Near Its Inner Limit in the Brackish Baltic Sea
- Dinoflagellate Cysts in Recent Sediments from Bahía Concepción, Gulf of California
- Occurrence of Carrageenan Structure in an Agar from the Red Seaweed Digenea simplex (Wulfen) C. Agardh (Rhodomelaceae, Ceramiales) with a Short Review of Carrageenan-Agarocolloid Hybrid in the Florideophycidae
- An Updated and Annotated List of Marine Brown Algae (Phaeophyceae) of the Caribbean Coast of the Republic of Panama
- Influence of the Plume of the River Po on the Distribution of Subtidal Microphytobenthos in the Northern Adriatic Sea
- Structural Analysis of Carrageenan from Farmed Varieties of Philippine Seaweed
- Morphology and Nuclear Small-subunit rDNA Sequences of Ishige (Ishigeaceae, Phaeophyceae) and its Phylogenetic Relationship among Selected Brown Algal Orders
- A Molecular Investigation of Mazzaella (Gigartinales, Rhodophyta) Morphologically Intermediate Between Mazzaella linearis and M. splendens
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