Evaluation of repopulation techniques for the giant kelp Macrocystis pyrifera (Laminariales)
-
Ximena Vásquez
,
Alejandro H. Buschmann
Abstract
In Chile, the brown alga Macrocystis pyrifera has been subject to strong harvesting pressure, resulting in severe reduction of natural beds, and a threat to the sustainability of the resource. Repopulation is a possible means for the recovery of overexploited natural populations of M. pyrifera. In this study, we determined density (ind. cm-2), length (mm) and biomass (g) of M. pyrifera sporophytes sown on three types of substrata (ceramic plates, pot scrubbers, clam shells). In laboratory experiments, sporophytes on ceramic plates were significantly longer than those on pot scrubbers or shells after 60 days, and their density was also higher. Juvenile sporophytes seeded on the three substrata were transferred to the sea and placed either inside or outside a M. pyrifera forest. At the end of the experiment in the sea under the kelp forest, highest biomass and length were obtained on the clam shell substrates, but the density did not show significant differences between the substrates. However, outside the kelp forest, no significant differences in kelp density or length were observed between the three substrates tested; but the biomass was significantly higher on the clam shells than on the other two substrata. We conclude that the installation of kelp seeded substratum units may be an option for recovery of exploited M. pyrifera forests.
Acknowledgments
This study was supported by a FONDEF grant (D07I1095) to Alfonso Gutiérrez and Ximena Vásquez González, as part of her degree dissertation. The collaboration of Luis Henríquez and Miguel Maldonado in the field and of Boris López in the statistical analyses, is also acknowledged.
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©2014 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Frontmatter
- Research articles
- Latitudinal, seasonal, and small-scale spatial differences of the giant kelp, Macrocystis pyrifera, and an herbivore at their southern range limit in the northern hemisphere
- Correlative evidence for competition between Fucus serratus and the introduced chlorophyte Codium fragile subsp. fragile on the southwest coast of Norway
- Spatio temporal and environmental factors influencing macroalgal β diversity in the Red Sea, Egypt
- Kinetics of cadmium accumulation and occurrence of dead cells in leaves of the submerged angiosperm Ruppia maritima
- Evaluation of repopulation techniques for the giant kelp Macrocystis pyrifera (Laminariales)
- Settlement of Gracilaria gracilis carpospores (Gracilariales, Rhodophyta) on natural substrates from the southwestern Atlantic coast (Chubut, Argentina)
- Morphological and molecular characterization of Neoralfsia hancockii comb. nov. (Ralfsiales, Phaeophyceae) from topotype of San José del Cabo, Baja California, Mexico
- Short communication
- Occurrence of the genus Tolypiocladia F. Schmitz (Rhodomelaceae, Rhodophyta) in the Atlantic Ocean
Articles in the same Issue
- Frontmatter
- Research articles
- Latitudinal, seasonal, and small-scale spatial differences of the giant kelp, Macrocystis pyrifera, and an herbivore at their southern range limit in the northern hemisphere
- Correlative evidence for competition between Fucus serratus and the introduced chlorophyte Codium fragile subsp. fragile on the southwest coast of Norway
- Spatio temporal and environmental factors influencing macroalgal β diversity in the Red Sea, Egypt
- Kinetics of cadmium accumulation and occurrence of dead cells in leaves of the submerged angiosperm Ruppia maritima
- Evaluation of repopulation techniques for the giant kelp Macrocystis pyrifera (Laminariales)
- Settlement of Gracilaria gracilis carpospores (Gracilariales, Rhodophyta) on natural substrates from the southwestern Atlantic coast (Chubut, Argentina)
- Morphological and molecular characterization of Neoralfsia hancockii comb. nov. (Ralfsiales, Phaeophyceae) from topotype of San José del Cabo, Baja California, Mexico
- Short communication
- Occurrence of the genus Tolypiocladia F. Schmitz (Rhodomelaceae, Rhodophyta) in the Atlantic Ocean
