|
|
|
|
|
| LUVIZOTTO,DANICE M.; ARAUJO,JULIANA E.; SILVA,MICHELE DE CÁSSIA P.; DIAS,ARMANDO C. F.; KRAFT,BEATE; TEGETMEYE,HALINA; STROUS,MARC; ANDREOTE,FERNANDO D.. |
| Abstract Mangroves are ecosystems located in the transition zone between land and sea, characterized by periodic flooding that confer to its unique characteristics. Little is known about the transformation of nutrients that occur during the organic matter degradation in this system. In this study, we monitor the nitrogen transformations in soils from three mangroves with distinct levels of contamination using labeled 15NO3-. We also screened the mangroves metagenomes for the presence of genes that encode enzymes involved in denitrification (nirS, nirK, nosZ, norB and narG), anaerobic oxidation of ammonia (anammox) (hh, hao and hzo) and dissimilatory nitrate reduction to ammonium (DNRA) (nrfA). The transformations of 15NO3- indicated the balance of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: N cycling; Anaerobiosis; Metagenome; Environmental contamination. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000200503 |
| |
|
|
| Demolinari,Michelle de Sales Moreira; Sousa,Rodrigo Nogueira de; Silva,Ivo Ribeiro da; Teixeira,Rafael da Silva; Neves,Júlio César Lima; Mendes,Gilberto de Oliveira. |
| ABSTRACT The amount of harvest residues retained in Eucalyptus plantations strongly influences soil organic matter (SOM), but the efficiency of conversion to SOM may vary according to the type of residue. This study evaluated the recovery of C from Eucalyptus residue components - leaves, bark, branches, roots, and a mix of all residues - in different SOM fractions with or without mineral-N supplementation (200 mg kg-1 of N). Variation in natural 13C abundance was used to trace the destination of residue-derived C in the soil. The C content of the light fraction (LF) and heavy fraction (HF) of SOM increased over a 240-days decomposition period in response to incorporation of Eucalyptus residues in the soil. Bark and leaf residues showed the best results.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: C cycling; N cycling; SOM; Stable isotopes. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100418 |
| |
|
|
|
