Nutrient stimulation of spore settlement in the kelps Pterygophora californica and Macrocystis pyrifera

Fertile Pterygophora californica Rupr. and Macrocystis pyrifera (L.) C. Ag. were collected in California, USA, from 1987 to 1989. Settlement activity of the spores was stimulated by nutrients, but this was not constant over time. Nutrients had no effect on the settlement of P. californica spores bet...

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Bibliographic Details
Published in:Marine biology 1990-06, Vol.107 (2), p.297-304
Main Authors: AMSLER, C. D, NEUSHUL, M
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Macrocystis pyrifera
Pterygophora californica
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Summary:Fertile Pterygophora californica Rupr. and Macrocystis pyrifera (L.) C. Ag. were collected in California, USA, from 1987 to 1989. Settlement activity of the spores was stimulated by nutrients, but this was not constant over time. Nutrients had no effect on the settlement of P. californica spores between 2 and 18 h after sunrise, but settlement activity was stimulated by a nutrient mixture between 20 and 24 h after sunrise (14 to 18 h after release). Settlement activity in M. pyrifera spores was unaffected at 2 to 3 h after release, but settlement activity was significantly stimulated from 5 to 12 h after release. A variety of individual nutrients significantly stimulated settlement in 8 to 9 h old M. pyrifera spores: ammonium, nitrate, glycine, phosphate, manganese-EDTA (18 mu M), borate, ferrous iron-EDTA, and ferric iron-EDTA.
ISSN:0025-3162
1432-1793
DOI:10.1007/BF01319829