Propagule release and recruitment in Porphyra perforata (Rhodophyta) from Baja California, Mexico
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Isaí Pacheco-Ruíz
Abstract
This study determined the effect of irradiance, temperature and photoperiod on the release of zygotospores and spermatia in Porphyra perforata from the Pacific coast of Baja California, Mexico. Reproductive blades were placed under controlled conditions of irradiance (5, 75, 150 and 300 μmol photons m−2 s−1), photoperiod [8:16; 12:12 and 16:8 light:dark (L:D)] and temperature (15, 18, 21 and 25°C). Peak zygotospore release occurred at 15–18°C and photoperiod of 16:8 L:D. Reproductive tissue released between 60% and 90% of zygotospores and spermatia during the first 10 days of incubation at 50 μmol photons m−2 s−1, 18°C and photoperiod of 16:8 L:D. Maximum zygotospore and spermatium release occurred in tissue collected between June and November. The number of zygotospores released was approximately 40% greater than that of spermatia (2.7×106 vs. 1.6×106 g FW−1 d−1). The reproductive foliar phase was observed throughout the year, but only thalli collected from April to January released zygotospores and spermatia. Collectively, the results suggest that low temperature, as observed in upwelling events, may induce high zygotospore and spermatium release during summer months.
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© Walter de Gruyter Berlin New York
Artikel in diesem Heft
- First letters to the editor in Botanica Marina's “Forum” section
- Propagule release and recruitment in Porphyra perforata (Rhodophyta) from Baja California, Mexico
- Spatio-temporal variability of intertidal algal assemblages of the Slovenian coast (Gulf of Trieste, northern Adriatic Sea)
- Persistence of sea urchin (Heliocidaris erythrogramma) barrens on the east coast of Tasmania: inhibition of macroalgal recovery in the absence of high densities of sea urchins
- Biomass and taxonomic richness of epilithic cyanobacteria in a tropical intertidal rocky habitat
- Spatial variation in the structural parameters of Cymodocea nodosa seagrass meadows in the Canary Islands: a multiscaled approach
- The structure of sulfated galactans from selected species of New Zealand Champia
- The structure of the galactan from Aeodes nitidissima (Halymeniales, Rhodophyta)
- The structure of the polysaccharide from Grateloupia intestinalis in New Zealand
- Evaluation of the structures of polysaccharides from three taxa in the genus Hymenena and from Acrosorium decumbens (Rhodophyta, Delesseriaceae)
- The structure of polysaccharides from selected New Zealand species of Grateloupia
- The application of 13C NMR spectroscopy to the red algal polysaccharides of selected New Zealand species of Lomentaria
- Pseudovivipary, a new form of asexual reproduction in the seagrass Posidonia oceanica
- Comments on the papers by Ian J. Miller devoted to carbon-13 NMR spectroscopy of red algal galactans
- Response to “Comments on the papers by Ian J. Miller devoted to carbon-13 NMR spectroscopy of red algal galactans” by Anatolii I. Usov; Bot. Mar. 48 (2005): 178–180
- 8th International Phycological Congress 13–19 August 2005, Durban, South Africa
Artikel in diesem Heft
- First letters to the editor in Botanica Marina's “Forum” section
- Propagule release and recruitment in Porphyra perforata (Rhodophyta) from Baja California, Mexico
- Spatio-temporal variability of intertidal algal assemblages of the Slovenian coast (Gulf of Trieste, northern Adriatic Sea)
- Persistence of sea urchin (Heliocidaris erythrogramma) barrens on the east coast of Tasmania: inhibition of macroalgal recovery in the absence of high densities of sea urchins
- Biomass and taxonomic richness of epilithic cyanobacteria in a tropical intertidal rocky habitat
- Spatial variation in the structural parameters of Cymodocea nodosa seagrass meadows in the Canary Islands: a multiscaled approach
- The structure of sulfated galactans from selected species of New Zealand Champia
- The structure of the galactan from Aeodes nitidissima (Halymeniales, Rhodophyta)
- The structure of the polysaccharide from Grateloupia intestinalis in New Zealand
- Evaluation of the structures of polysaccharides from three taxa in the genus Hymenena and from Acrosorium decumbens (Rhodophyta, Delesseriaceae)
- The structure of polysaccharides from selected New Zealand species of Grateloupia
- The application of 13C NMR spectroscopy to the red algal polysaccharides of selected New Zealand species of Lomentaria
- Pseudovivipary, a new form of asexual reproduction in the seagrass Posidonia oceanica
- Comments on the papers by Ian J. Miller devoted to carbon-13 NMR spectroscopy of red algal galactans
- Response to “Comments on the papers by Ian J. Miller devoted to carbon-13 NMR spectroscopy of red algal galactans” by Anatolii I. Usov; Bot. Mar. 48 (2005): 178–180
- 8th International Phycological Congress 13–19 August 2005, Durban, South Africa
