%0 Journal Article %J Estuaries %D 2003 %T Tracing the flow of organic matter from primary producers to filter feeders in Ria Formosa Lagoon, Southern Portugal %A Machas, R. %A Santos, R. %A Peterson, B. %K estuary %K food web %K LTER-PIE %K stable isotope %B Estuaries %V 26 %P 846-856 %G eng %M PIE107 %] NSF-LTER-PIE %R 10.1007/BF02803343 %F Journal Article %0 Thesis %D 1999 %T Analise isotopica da cadeia alimentar da Ria Formosa: Conribuicao relitiva dos produtores primaries %A Machas, R. %K LTER-PIE %K stable isotopes, carbon, nitrogen, sulfur, food web %I University of Coimbra %C Coimbra, Portugal %V M.S. %G eng %9 mastersthesis %M PIE18 %] NSF-LTER-PIE %F M.S. Thesis %0 Journal Article %J Acta Oecologica %D 1999 %T Sources of organic matter in Ria Formosa revealed by stable isotope analysis %A Machas, R. %A Santos, R. %K carbon %K estuary %K food web %K LTER-PIE %K nitrogen %K stable isotope %B Acta Oecologica %V 20 %P 463-469 %G eng %M PIE19 %] NSF-LTER-PIE %R 10.1016/S1146-609X(99)00122-8 %F Journal Article