The response of epiphytic bacteria on Vallisneria natans (Lour.) Hara (Hydrocharitaceae) to increasing nutrient loadings.
J Basic Microbiol
; 56(6): 608-16, 2016 Jun.
Article
en En
| MEDLINE
| ID: mdl-27143295
ABSTRACT
To investigate the effects of water column nutrient loading on epiphytic bacteria, we determined the abundance and community composition of epiphytic bacteria on the submerged macrophyte Vallisneria natans (Lour.) Hara during the growth season (June-October) under four different nutrient concentrations (nitrogen (N)-phosphorus (P) in mg L(-1) 0.5-0.05, 1.0-0.1, 5.0-0.5, 10.0-1.0; hereafter NP-1, NP-2, NP-3, NP-4, respectively), using epifluorescence microscopy method and terminal restriction fragment length polymorphism (T-RFLP) analysis, respectively. Relative to low nutrient conditions (NP-1), there was no significant effect on the epiphytic bacterial community, and even a decrease in the number of epiphytic bacteria, which linked to the well growth status of host macrophytes at moderate nutrient conditions (NP-2). However, further nutrient enrichment induced significant increase in the abundance of epiphytic bacteria, and marked changes in the community structures of epiphytic bacteria. Furthermore, at high nutrient conditions, epiphytic bacterial communities varied widely temporally, and were not stable compared with those at the lower nutrient conditions. These results indicated that the effects of nutrient enrichment on epiphytic bacteria were nonlinear and dependent on the nutrient concentrations in the water.
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Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Fósforo
/
Bacterias
/
Contaminantes Químicos del Agua
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Hydrocharitaceae
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Eutrofización
/
Nitrógeno
Idioma:
En
Revista:
J Basic Microbiol
Asunto de la revista:
MICROBIOLOGIA
Año:
2016
Tipo del documento:
Article
País de afiliación:
China