Effects of pulse and press additions of salt on biofilms of nutrient-rich streams
Chronic and pulse increments of salinity can cause different consequences on the aquatic communities, and its effects are related to factors such as the magnitude, frequency and ionic composition, as well as on the baseline salt concentrations in the water. The aim of this study was to explore the r...
Guardado en:
| Autores principales: | , , |
|---|---|
| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2017
|
| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/103330 |
| Aporte de: |
| id |
I19-R120-10915-103330 |
|---|---|
| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Naturales Salinization Epipelic biofilm Microcosm Community recovery Short-term experiment |
| spellingShingle |
Ciencias Naturales Salinization Epipelic biofilm Microcosm Community recovery Short-term experiment Cochero, Joaquín Licursi, Magdalena Gómez, Nora Effects of pulse and press additions of salt on biofilms of nutrient-rich streams |
| topic_facet |
Ciencias Naturales Salinization Epipelic biofilm Microcosm Community recovery Short-term experiment |
| description |
Chronic and pulse increments of salinity can cause different consequences on the aquatic communities, and its effects are related to factors such as the magnitude, frequency and ionic composition, as well as on the baseline salt concentrations in the water. The aim of this study was to explore the responses of the biofilms from a nutrient-rich stream to both pulse and chronic additions of salt, along with their recovery after the stressor had been removed. For this purpose, a microcosm study was conducted exposing biofilms to water enriched with sodiumchloride in two treatments (press and pulse), and comparing the changes in the biofilm with control microcosms without salt additions. The experiment lasted 72 h, and the variables measured included bacterial density, chlorophyll-a concentration, community composition, total carbohydrate content, oxygen consumption and the percentage of nuclear alterations in diatoms. Both treatments resulted in a decrease in the bacterial density of the biofilm and in oxygen consumption; the chronic treatment in particular also caused an increased percentage of nuclear abnormalities in the diatom assemblage. The biofilm recovered to control levels after the treatments had been discontinued for 72 h. We concluded that the biofilms can be altered significantly under both chronic and pulse additions of salt even after a short-term exposure, and that the community can recover if the stressor is withdrawn. |
| format |
Articulo Articulo |
| author |
Cochero, Joaquín Licursi, Magdalena Gómez, Nora |
| author_facet |
Cochero, Joaquín Licursi, Magdalena Gómez, Nora |
| author_sort |
Cochero, Joaquín |
| title |
Effects of pulse and press additions of salt on biofilms of nutrient-rich streams |
| title_short |
Effects of pulse and press additions of salt on biofilms of nutrient-rich streams |
| title_full |
Effects of pulse and press additions of salt on biofilms of nutrient-rich streams |
| title_fullStr |
Effects of pulse and press additions of salt on biofilms of nutrient-rich streams |
| title_full_unstemmed |
Effects of pulse and press additions of salt on biofilms of nutrient-rich streams |
| title_sort |
effects of pulse and press additions of salt on biofilms of nutrient-rich streams |
| publishDate |
2017 |
| url |
http://sedici.unlp.edu.ar/handle/10915/103330 |
| work_keys_str_mv |
AT cocherojoaquin effectsofpulseandpressadditionsofsaltonbiofilmsofnutrientrichstreams AT licursimagdalena effectsofpulseandpressadditionsofsaltonbiofilmsofnutrientrichstreams AT gomeznora effectsofpulseandpressadditionsofsaltonbiofilmsofnutrientrichstreams |
| bdutipo_str |
Repositorios |
| _version_ |
1764820441801687041 |