Short-term effects of CO2, nutrients and temperature on three marine macroalgae under solar radiation
| Autor: | Nathalie Korbee, Udo Nitschke, E. Ruiz, Angel Pérez-Ruzafa, G. Ordoñez, Helena Abreu, M. Zanolla, Solène Connan, Fátima Vaz-Pinto, Dagmar B. Stengel, Francisco Arenas, Paula S.M. Celis-Plá, Félix L. Figueroa, E. Bañares-España, Kai Bischof, Rafael M. Conde-Álvarez, Erik-jan Malta, Fungyi Chow, Ronny Marquardt, Talina Konotchick, María Altamirano, Michaël Hermoso, María Teresa Mata, J. Bonomi Barufi, Cristina Aparecida Gomes Nassar, Daniel Robledo, Paulo A. C. Flores, Diana López |
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| Přispěvatelé: | Publica |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
light climate
macroalgae Photosystem II QH301-705.5 ulva-lactuca chemistry.chemical_element ocean acidification Chlorophyta Aquatic Science Oceanography Microbiology Nutrient nutrients uv-radiation Botany outdoor multi Biology (General) Chlorophyll fluorescence Ecology Evolution Behavior and Systematics atmospheric co2 photosynthesis chlorophyll fluorescence Ecology biology Diurnal temperature variation tank system temperature food and beverages Ocean acidification seaweed communities lowered ph biology.organism_classification Nitrogen QR1-502 intertidal macroalgae climate change chemistry pigment content climate-change CLOROFILA Carbon |
| Zdroj: | Aquatic Biology, Vol 22, Pp 159-176 (2014) Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1864-7790 1864-7782 |
| Popis: | Three macroalgal species belonging to Chlorophyta (Ulva rigida), Rhodophyta (Ellisolandia elongata) and Phaeophyceae (Heterokontophyta; Cystoseira tamariscifolia), natu- rally growing at the same shore level and representing 3 morpho-functional groups, were exposed to short-term changes in temperature under different carbon and nitrogen regimes. Experiments were conducted in outdoor tanks at 4 combinations of carbon and nitrogen levels under reduced solar radiation. In vivo chl a fluorescence parameters and pigment contents were monitored to assess diurnal physiological responses and potential for recovery. Strong fluctuations in chl a flu- orescence parameters, but not in chl a content, were observed in response to diurnal variation in solar radiation and light climate within the tanks; sensitivity varied between algal species and, in some cases, depended on the carbon and nitrogen regime. Nitrogen uptake was similarly high in U. rigida and E. elongata and lowest in C. tamariscifolia. In U. rigida and E. elongata, chl a con- centrations decreased after high-carbon treatments. Effective photosystem II quantum efficiency was reduced in all species at noon, and lowest in C. tamariscifolia. The results highlight the com- plexity of physiological short-term acclimations which were most likely linked to biochemical changes at the cellular level. Long-term experiments are required in future for more comprehen- sive investigation of the observed interactive effects of the different environmental parameters. |
| Databáze: | OpenAIRE |
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