caa a22 4500 60550945X CHVBK 20210128100641.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s10452-015-9512-9 doi (NATIONALLICENCE)springer-10.1007/s10452-015-9512-9 Are nutrients and light limiting summer phytoplankton in a temperate coastal lagoon? [Elektronische Daten] [Rita Domingues, Cátia Guerra, Ana Barbosa, Helena Galvão] The Ria Formosa coastal lagoon is one of the most important and vulnerable ecosystems in Portugal, and it is subjected to strong anthropogenic pressures and natural nutrient inputs associated with coastal upwelling. The aim of this study was to evaluate the occurrence of nutrient and light limitation of phytoplankton growth during the productive period, and assess potential impacts of limitation on ecosystem eutrophication. Inorganic nutrients were added to natural microcosms filled with water collected at the landward and seaward boundaries, in summer 2012. Experimental treatments were incubated in situ under two different light intensities during 24h. Phytoplankton composition, abundance and biomass, net growth rates and nutrient consumption were evaluated. At the landward location, potential nutrient limitation by nitrogen was observed. Nitrogen addition led to a significant increase in N consumption, resulting in higher phytoplankton growth, mainly diatoms, in all N-enriched treatments, under both light intensities. Significant consumption of silica and phosphorus was not reflected on growth, and it was probably due to luxury consumption. At the seaward station, phytoplankton, mainly cyanobacteria and eukaryotic picophytoplankton, were primarily limited by light, due to a deeper mixed layer. Nutrients were not limiting the phytoplankton growth due to import of nutrients from upwelled waters to the adjacent coastal zone. Springer Science+Business Media Dordrecht, 2015 Eutrophication nationallicence Limitation nationallicence Phytoplankton nationallicence Nutrients nationallicence Light nationallicence Coastal lagoons nationallicence Domingues Rita CIMA - Centre for Marine and Environmental Research, Universidade do Algarve, Campus de Gambelas, 8005-139, Faro, Portugal aut Guerra Cátia CIMA - Centre for Marine and Environmental Research, Universidade do Algarve, Campus de Gambelas, 8005-139, Faro, Portugal aut Barbosa Ana CIMA - Centre for Marine and Environmental Research, Universidade do Algarve, Campus de Gambelas, 8005-139, Faro, Portugal aut Galvão Helena CIMA - Centre for Marine and Environmental Research, Universidade do Algarve, Campus de Gambelas, 8005-139, Faro, Portugal aut Aquatic Ecology Springer Netherlands 49/2(2015-06-01), 127-146 1386-2588 49:2<127 2015 49 10452 https://doi.org/10.1007/s10452-015-9512-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10452-015-9512-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Domingues Rita CIMA - Centre for Marine and Environmental Research, Universidade do Algarve, Campus de Gambelas, 8005-139, Faro, Portugal aut NATIONALLICENCE 700 1- Guerra Cátia CIMA - Centre for Marine and Environmental Research, Universidade do Algarve, Campus de Gambelas, 8005-139, Faro, Portugal aut NATIONALLICENCE 700 1- Barbosa Ana CIMA - Centre for Marine and Environmental Research, Universidade do Algarve, Campus de Gambelas, 8005-139, Faro, Portugal aut NATIONALLICENCE 700 1- Galvão Helena CIMA - Centre for Marine and Environmental Research, Universidade do Algarve, Campus de Gambelas, 8005-139, Faro, Portugal aut NATIONALLICENCE 773 0- Aquatic Ecology Springer Netherlands 49/2(2015-06-01), 127-146 1386-2588 49:2<127 2015 49 10452