Spatial and temporal variation of the nutrient concentrations in leaves and sediment between the roots of Laguncularia racemosa (L.) Gaertn. f and Rhizophora mangle L. was analyzed in the mangrove forest of the estuary of São Mateus River, Espírito Santo, Brazil. In leaves, the nutrients followed the sequence: N> Ca> K> Mg> S> P> Fe> Mn> Zn> Cu, and there were significant differences between species and sites studied. In general, the levels of K were higher in the dry season compared to the rainy season for both species analyzed while Ca and Cu showed higher concentrations in the rainy season for Laguncularia racemosa. In the sediment, the nutrients followed the sequence: Mg> Ca> Fe> K> Mn> P> Zn> Cu, in general, with lower concentrations at the site where the sediment was sandier. We observed a significant variation of nutrient concentrations in the sediment between the periods analyzed, but the seasonal pattern was not clear for all nutrients. Nutrient concentration profile found in leaves of both plant species was not correlated with concentrations found in the respective sediments. The concentration factor was less than 1.0 for Fe and between 1.0 and 3.7 for Mn, Zn and Cu. These results provide physiological evidences about the relevance of these tree species for the role of mangroves as biogeochemical barriers to the transit of heavy metals.Key words: Concentration factor, macronutrients, micronutrients, metals resuMo A variação espacial e temporal das concentrações de nutrientes das folhas e do sedimento entre as raízes de Laguncularia racemosa (L.) Gaertn. f. e Rhizophora mangle L. foi analisada no manguezal do estuário do Rio São Mateus, Espírito Santo, Brasil. No tecido foliar, os nutrientes seguiram a ordem: N > Ca > K > Mg > S > P > Fe > Mn > Zn > Cu, havendo diferença significativa entre espécies e sítios de estudo. Em geral, os teores de K foram mais elevados no período seco em relação ao período chuvoso, para ambas as espécies analisadas, enquanto que Ca e Cu exibiram maiores concentrações no período chuvoso, para Laguncularia racemosa.No sedimento, os nutrientes seguiram a ordem: Mg > Ca > Fe > K > Mn > P > Zn > Cu, em geral, com menores concentrações no sítio onde o sedimento foi mais arenoso. Registrou-se variação significativa das concentrações de nutrientes do sedimento entre os períodos analisados, mas o padrão sazonal não foi claro para todos nutrientes. Concentrações de nutrientes determinadas nas folhas de ambas as espécies não se correlacionaram com as concentrações dos respectivos sedimentos. O fator de concentração foi menor que 1,0 para Fe e entre 1,0 e 3,7 para Mn, Zn e Cu. Estes resultados fornecem evidências fisiológicas sobre a relevância destas espécies arbóreas para o papel dos manguezais como barreira biogeoquímica ao trânsito de metais pesados.palavras chave: fator de concentração, macronutrientes, micronutrientes, metais
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2025 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.