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Seagrass photo-physiological responses in natural high-CO2 environment
Costa, Monya; Olivé, Irene; Barrote, Isabel; Procaccini, G.; Mazzuca, Silvia; Vizzini, Salvatrice; Santos, RuiThe atmospheric concentration of CO2 has been steeply increasing over the last 200 years, with an associated increase of total dissolved inorganic carbon (Ci) and a decrease of the oceans’ pH. Seagrasses are among the most productive marine ecosystems, but yet little is known on the effects of high-CO2/low pH on their photosynthetic physiology and the ecological consequences. Marine CO2 seepage areas have been ...
The effects of epiphytes on light harvesting and antioxidant responses in the s...
Costa, Monya; Silva, João; Olivé, Irene; Barrote, Isabel; Alexandre, A.; Albano, Sílvia; Santos, RuiPosidonia oceanica (L.) Delile is a subtidal seagrass whose leaves are commonly colonized by epiphytes. Epiphytes pose physical barriers to light penetration within the leaves, with possible significant impacts on photosynthesis. Furthermore, epiphytes can indirectly be responsible for leaf chlorosis, necrosis and senescence which are known to be related with the increase of oxygen reactive species (ROS) levels...
Responses of zostera marina and cymodocea nodosa to light-limitation stress
Silva, João; Barrote, Isabel; Costa, Monya; Albano, Sílvia; Santos, RuiThe effects of light-limitation stress were investigated in natural stands of the seagrasses Zostera marina and Cymodocea nodosa in Ria Formosa coastal lagoon, southern Portugal. Three levels of light attenuation were imposed for 3 weeks in two adjacent meadows (2–3 m depth), each dominated by one species. The response of photosynthesis to light was determined with oxygen electrodes. Chlorophylls and carotenoid...
Physiological responses of Zostera marina and Cymodocea nodosa to light-limitat...
Silva, João; Barrote, Isabel; Costa, Monya; Albano, Sílvia; Santos, RuiThe effects of light-limitation stress were investigated in natural stands of the seagrasses Zostera marina and Cymodocea nodosa in Ria Formosa coastal lagoon, southern Portugal. Three levels of light attenuation were imposed for 3 weeks in two adjacent meadows (2–3 m depth), each dominated by one species. The response of photosynthesis to light was determined with oxygen electrodes. Chlorophylls and carotenoid...
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