Intra- and inter-annual variation in a seagrass meadow on the Caribbean coast of Costa Rica: 2009-2015
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| Format: | Artículo científico |
| Language: | en |
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Universidad de Costa Rica
2018
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| author | Margarita Loría-Naranjo |
| author_facet | Margarita Loría-Naranjo |
| contents | Intra- and inter-annual variation in a seagrass meadow on the Caribbean coast of Costa Rica: 2009-2015 Margarita Loría-Naranjo Jimena Samper-Villarreal Marylaura Sandoval-Siles Jorge Cortés Biología LAI biomass CARICOMP leaf area seagrass bed Seagrass beds are an important ecosystem on the Caribbean coast of Costa Rica. At Cahuita National Park (CNP) a seagrass bed at Perezoso has been monitored continually since 1999 within the CARICOMP program. Thalassia testudinum is the dominant seagrass species, in some cases mixed with Syringodium filiforme. The results from the 2009 to 2015 monitoring period are presented here, and contrasted with data before 2009. Total (above and below ground tissue) mean biomass of T. testudinum was higher (1 255.4 ± 146.0 gm-2) than biomass before 2009, with an increasing tendency. However, productivity (1.5±0.59 gm-2d-1) and turnover rate (4.3 ± 1.22 %d-1) were lower than previous monitoring periods. In this period, mean leaf area diminished considerably (4.9 ± 2.30 m2), but leaf area index (LAI) increased (1.9 ± 0.80 m2leafm-2) in comparison to prior monitoring. Productivity, density, turnover rate, LAI and biomass showed intra-annual variations; while mean biomass of T. testudinum did not vary significantly among years. No correlations were found between water salinity, temperature and clarity with seagrass measurements. However, most seagrass parameters were strongly correlated with precipitation. These results highlight the effect of external environmental agents acting on the ecosystem. CNP presents a long-term stable seagrass meadow. However, there are indirect signals, such as high biomass and above-ground biomass proportion, along with low productivity and LAI, which point to a nutrient increment in Perezoso’s seagrass bed. To continue protecting this seagrass bed, it is necessary to improve monitoring methods, and seagrass beds should be included in national conservation policies and monitoring programs. 2018 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44959350016 https://www.redalyc.org/journal/449/44959350016/ https://www.redalyc.org/journal/449/44959350016/html/ https://www.redalyc.org/journal/449/44959350016/44959350016.epub https://www.redalyc.org/journal/449/44959350016/movil 10.15517/rbt.v66i3.31035 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.66 |
| format | Artículo científico |
| id | redalyc_44959350016 |
| institution | Redalyc |
| language | en |
| publishDate | 2018 |
| publisher | Universidad de Costa Rica |
| spellingShingle | Intra- and inter-annual variation in a seagrass meadow on the Caribbean coast of Costa Rica: 2009-2015 Margarita Loría-Naranjo Biología LAI biomass CARICOMP leaf area seagrass bed Intra- and inter-annual variation in a seagrass meadow on the Caribbean coast of Costa Rica: 2009-2015 Margarita Loría-Naranjo Jimena Samper-Villarreal Marylaura Sandoval-Siles Jorge Cortés Biología LAI biomass CARICOMP leaf area seagrass bed Seagrass beds are an important ecosystem on the Caribbean coast of Costa Rica. At Cahuita National Park (CNP) a seagrass bed at Perezoso has been monitored continually since 1999 within the CARICOMP program. Thalassia testudinum is the dominant seagrass species, in some cases mixed with Syringodium filiforme. The results from the 2009 to 2015 monitoring period are presented here, and contrasted with data before 2009. Total (above and below ground tissue) mean biomass of T. testudinum was higher (1 255.4 ± 146.0 gm-2) than biomass before 2009, with an increasing tendency. However, productivity (1.5±0.59 gm-2d-1) and turnover rate (4.3 ± 1.22 %d-1) were lower than previous monitoring periods. In this period, mean leaf area diminished considerably (4.9 ± 2.30 m2), but leaf area index (LAI) increased (1.9 ± 0.80 m2leafm-2) in comparison to prior monitoring. Productivity, density, turnover rate, LAI and biomass showed intra-annual variations; while mean biomass of T. testudinum did not vary significantly among years. No correlations were found between water salinity, temperature and clarity with seagrass measurements. However, most seagrass parameters were strongly correlated with precipitation. These results highlight the effect of external environmental agents acting on the ecosystem. CNP presents a long-term stable seagrass meadow. However, there are indirect signals, such as high biomass and above-ground biomass proportion, along with low productivity and LAI, which point to a nutrient increment in Perezoso’s seagrass bed. To continue protecting this seagrass bed, it is necessary to improve monitoring methods, and seagrass beds should be included in national conservation policies and monitoring programs. 2018 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44959350016 https://www.redalyc.org/journal/449/44959350016/ https://www.redalyc.org/journal/449/44959350016/html/ https://www.redalyc.org/journal/449/44959350016/44959350016.epub https://www.redalyc.org/journal/449/44959350016/movil 10.15517/rbt.v66i3.31035 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.66 |
| title | Intra- and inter-annual variation in a seagrass meadow on the Caribbean coast of Costa Rica: 2009-2015 |
| topic | Biología LAI biomass CARICOMP leaf area seagrass bed |
| url | https://www.redalyc.org/articulo.oa?id=44959350016 https://www.redalyc.org/journal/449/44959350016/ https://www.redalyc.org/journal/449/44959350016/html/ https://www.redalyc.org/journal/449/44959350016/44959350016.epub https://www.redalyc.org/journal/449/44959350016/movil |