Eichhornia azurea decomposition and the bacterial dynamic: an experimental research
| Autor: | Zaryf Dahroug, Natália Fernanda Santana, Thomaz Aurélio Pagioro |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Eichhornia Eichhornia azurea lcsh:QR1-502 chemistry.chemical_element Dry weight COD 010603 evolutionary biology 01 natural sciences Microbiology lcsh:Microbiology Decomposition rate 03 medical and health sciences Aquatic plant Dissolved organic carbon Botany Environmental Microbiology Ecosystem biology Bacteria Phosphorus biology.organism_classification Decomposition Macrophyte Kinetics 030104 developmental biology Biodegradation Environmental chemistry Environmental chemistry Aquatic macrophyte |
| Zdroj: | Brazilian Journal of Microbiology Brazilian Journal of Microbiology, Volume: 47, Issue: 2, Pages: 279-286, Published: JUN 2016 Brazilian Journal of Microbiology, Vol 47, Iss 2, Pp 279-286 (2016) Brazilian Journal of Microbiology v.47 n.2 2016 Sociedade Brasileira de Microbiologia (SBM) instacron:SBM |
| ISSN: | 1517-8382 |
| DOI: | 10.1016/j.bjm.2015.08.001 |
| Popis: | Organic decomposition is a complex interaction between chemical, physical and biological processes, where the variety of aquatic vascular plants is essential for the trophic dynamics of freshwater ecosystems. The goal of this study was to determine the aquatic macrophyte Eichhornia azurea (Sw.) Kunth decomposition rate, the time relation with the limnological parameters, and whether this relationship is a result of decomposition processes. To that end, we collected water and leaves of E. azurea in Surf Leopoldo, PR. The experiment consisted of two treatments: 25 containers with 450 mL of water and 0.8 g of biomass dry weight were used with or without the addition of macrophytes. Samples were collected in triplicate at times 0, 3 h, 6 h, 12 h, 24 h, 72 h, 120 h, 168 h and 240 h. When the container was removed, the plant material was dried in an oven. After 48 h, the material was measured to obtain the final dry weight. Analyses of pH, conductivity, dissolved oxygen, total phosphorus N-ammonia (NH4), soluble reactive phosphorus (PO4) and dissolved organic carbon were performed, and the decomposition rate was calculated. The results showed significant temporal variation of limnological parameters in the study. Additionally, dissolved oxygen, conductivity, dissolved organic carbon and total phosphorus were correlated with the dry weight of the biomass, suggesting that E. azurea decomposition significantly interferes with the dynamics of these variables. |
| Databáze: | OpenAIRE |
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