2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/25/2021 | 8:30 AM - 10:30 AM | SPATIAL AND TEMPORAL DISTRIBUTION OF BACTERIAL ASSEMBLAGES IN INTERMITTENT STREAMS ARE DRIVEN BY ALTERNATING DISPERSAL AND LOCAL FACTORS | Virtual Platform
SPATIAL AND TEMPORAL DISTRIBUTION OF BACTERIAL ASSEMBLAGES IN INTERMITTENT STREAMS ARE DRIVEN BY ALTERNATING DISPERSAL AND LOCAL FACTORS
Bacterial assemblages colonizing river sediments can result from the species selection (or sorting) by the local environmental conditions, or from dispersal processes. The relative importance of these two processes may differ according to the hydrological variability in time and space, and this is particularly large in intermittent streams. We investigated river bacterial assemblages by sampling sediments from different riverine habitats in two sites (permanent vs. intermittent) and four hydrological periods (encompassing the expansion, contraction, and desiccation phases). Samples included sediments from the aquatic streambed and terrestrial floodplain habitats. Results reveal that river intermittency is reducing the temporal variability of bacterial assemblages among habitat types. Such outcome suggests that water scarcity is a selective force that favours few but tolerant dominant bacterial taxa. These tolerant taxa may also outcompete other species by the effect of priority effects. Our findings indicate that the large differences in bacterial assemblages from the intermittent site were imposed by the hydrological variability and emphasized the relevance of local processes as structuring factors. Our results highlight the complexity of temporal and spatial distribution of bacterial community assemblages occurring in temporary river networks.
- Microbial ecology
- Biodiversity
- Habitat
Presentation:
This presentation has not yet been uploaded.
Handouts:
Handout is not Available
Transcripts:
CART transcripts are NOT YET available, but will be posted shortly after the conference
Presenters/Authors
Anna Freixa
(), Catalan Institute for Water Research (ICRA), Girona, Spain, afreixa@icra.cat;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Juan David González-Trujillo
(), The National Museum of Natural Sciences, Madrid, Spain, jdgonzalezt@unal.edu.co;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Carles Borrego
(), Catalan Institute for Water Research (ICRA), Girona, Spain, cborrego@icra.cat;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Sergi Sabater
(), Catalan Institute for Water Research (ICRA), Girona, Spain, ssabater@icra.cat;
ASHA DISCLOSURE:
Financial -
Nonfinancial -