ESTGV - DA - Artigo em revista científica, indexada ao WoS/Scopus
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Browsing ESTGV - DA - Artigo em revista científica, indexada ao WoS/Scopus by Author "Becerra-Castro, Cristina"
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- Characterization of bacterial communities from Masseiras, a unique Portuguese greenhouse agricultural systemPublication . Becerra-Castro, Cristina; Lopes, Ana Rita; Teixeira, Sara; Silva, M. Elisabete F.; Pimenta, Elisabete; Manaia, Célia M.; Nunes, Olga‘‘Masseiras’’ is an ancient Portuguese agriculture system, where soil was developed from sand dunes enriched with seaweeds over more than a century. Due to the importance for the local economy, this system evolved for greenhouse structures. In this study we compared the bacterial community composition and structure of ‘‘Masseiras’’ soil, aiming at assessing the potential impact of different agricultural practices. The bulk soil of two greenhouses (following or not the recommended agriculture good practices, FGP and NFGP, respectively) was compared based on their physicochemical properties and bacterial community. In both FGP and NFGP, Proteobacteria, Acidobacteria, Actinobacteria, Bacteroidetes, Firmicutes, and Gemmatimonadetes were in a proportion of 5:1:1:1:1:1. However, the bacterial community of soil FGP was richer and more diverse than that of soil NFGP. Members of the classes Bacilli and Gemm-1, with higher relative abundance in NFGP and FGP, respectively, were those contributing most for distinguishing the bacterial communities of both soils. The differences in the structure of the bacterial communities correlated (Mantel test) with some soil physicochemical properties, such as electrical conductivity and nitrate and Zn contents, which were significantly higher in soil NFGP than in soil FGP.
- Wastewater reuse in irrigation: A microbiological perspective on implications in soil fertility and human and environmental healthPublication . Becerra-Castro, Cristina; Lopes, Ana Rita; Vaz-Moreira, Ivone; Silva, Elisabete; Manaia, Célia; Nunes, OlgaThe reuse of treated wastewater, in particular for irrigation, is an increasingly common practice, encouraged by governments and of fi cial entities worldwide. Irrigation with wastewater may have implications at two different levels:alterthephysicochemicalandmicrobiologicalpropertiesofthesoiland/orintroduceandcontributetothe accumulation of chemical and biological contaminants in soil. The fi rst may affect soil productivity and fertility; the second may pose serious risks to the human and environmental health. The sustainable wastewater reuse in agriculture should prevent both typesofeffects,requiring a holisticand integratedrisk assessment. Inthis article wecriticallyreviewpossible effects of irrigation with treatedwastewater, with special emphasison soil microbi- ota. The maintenance of a rich and diversi fi ed autochthonous soil microbiota and the use of treated wastewater with minimal levels of potential soil contaminants are proposed as sine qua non conditions to achieve a sustain- able wastewater reuse for irrigation.