Details
| Original language | English |
|---|---|
| Pages (from-to) | 1438–1441 |
| Number of pages | 4 |
| Journal | Microbial ecology |
| Volume | 86 |
| Issue number | 2 |
| Early online date | 16 Sept 2022 |
| Publication status | Published - Aug 2023 |
Abstract
Water is the most indispensable natural resource; yet, organic pollution of freshwater sources is widespread. In recent years, there has been increasing concern over the vast array of emerging organic contaminants (EOCs) in the effluent of wastewater treatment plants (WWTPs). Several of these EOCs are degraded within the pore space of riverbeds by active microbial consortia. However, the mechanisms behind this ecosystem service are largely unknown. Here, we report how phosphate concentration and predator–prey interactions drive the capacity of bacteria to process a model EOC (ibuprofen). The presence of phosphate had a significant positive effect on the population growth rate of an ibuprofen-degrading strain. Thus, when phosphate was present, ibuprofen removal efficiency increased. Moreover, low and medium levels of predation, by a ciliated protozoan, stimulated bacterial population growth. This unimodal effect of predation was lost under high phosphate concentration, resulting in the flattening of the relationships between predator density and population growth of ibuprofen degraders. Our results suggest that moderate nutrient and predation levels promote the growth rate of bacterial degraders and, consequently, the self-purifying capability of the system. These findings enhance our understanding of the mechanisms by which riverbed communities drive the processing of EOCs.
Keywords
- Bioremediation, Experiment, Food web, Micropollutants, Tetrahymena pyriformis
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Ecology, Evolution, Behavior and Systematics
- Environmental Science(all)
- Ecology
- Agricultural and Biological Sciences(all)
- Soil Science
Sustainable Development Goals
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In: Microbial ecology, Vol. 86, No. 2, 08.2023, p. 1438–1441.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Intermediate Levels of Predation and Nutrient Enrichment Enhance the Activity of Ibuprofen-Degrading Bacteria
AU - Peralta-Maraver, Ignacio
AU - Rutere, Cyrus
AU - Horn, Marcus A
AU - Reche, Isabel
AU - Behrends, Volker
AU - Reiss, Julia
AU - Robertson, Anne L
N1 - Funding information: This project was funded by the European Union Horizon 2020 research and innovation programme under Marie Sk?odowska-Curie grant agreement No. 641939.
PY - 2023/8
Y1 - 2023/8
N2 - Water is the most indispensable natural resource; yet, organic pollution of freshwater sources is widespread. In recent years, there has been increasing concern over the vast array of emerging organic contaminants (EOCs) in the effluent of wastewater treatment plants (WWTPs). Several of these EOCs are degraded within the pore space of riverbeds by active microbial consortia. However, the mechanisms behind this ecosystem service are largely unknown. Here, we report how phosphate concentration and predator–prey interactions drive the capacity of bacteria to process a model EOC (ibuprofen). The presence of phosphate had a significant positive effect on the population growth rate of an ibuprofen-degrading strain. Thus, when phosphate was present, ibuprofen removal efficiency increased. Moreover, low and medium levels of predation, by a ciliated protozoan, stimulated bacterial population growth. This unimodal effect of predation was lost under high phosphate concentration, resulting in the flattening of the relationships between predator density and population growth of ibuprofen degraders. Our results suggest that moderate nutrient and predation levels promote the growth rate of bacterial degraders and, consequently, the self-purifying capability of the system. These findings enhance our understanding of the mechanisms by which riverbed communities drive the processing of EOCs.
AB - Water is the most indispensable natural resource; yet, organic pollution of freshwater sources is widespread. In recent years, there has been increasing concern over the vast array of emerging organic contaminants (EOCs) in the effluent of wastewater treatment plants (WWTPs). Several of these EOCs are degraded within the pore space of riverbeds by active microbial consortia. However, the mechanisms behind this ecosystem service are largely unknown. Here, we report how phosphate concentration and predator–prey interactions drive the capacity of bacteria to process a model EOC (ibuprofen). The presence of phosphate had a significant positive effect on the population growth rate of an ibuprofen-degrading strain. Thus, when phosphate was present, ibuprofen removal efficiency increased. Moreover, low and medium levels of predation, by a ciliated protozoan, stimulated bacterial population growth. This unimodal effect of predation was lost under high phosphate concentration, resulting in the flattening of the relationships between predator density and population growth of ibuprofen degraders. Our results suggest that moderate nutrient and predation levels promote the growth rate of bacterial degraders and, consequently, the self-purifying capability of the system. These findings enhance our understanding of the mechanisms by which riverbed communities drive the processing of EOCs.
KW - Bioremediation
KW - Experiment
KW - Food web
KW - Micropollutants
KW - Tetrahymena pyriformis
UR - http://www.scopus.com/inward/record.url?scp=85138130206&partnerID=8YFLogxK
U2 - 10.15488/15940
DO - 10.15488/15940
M3 - Article
C2 - 36383236
VL - 86
SP - 1438
EP - 1441
JO - Microbial ecology
JF - Microbial ecology
SN - 0095-3628
IS - 2
ER -