Presentation Title

Characterizing the microbiology of the Los Angeles River: from the Sepulveda basin to Golden Shores.

Faculty Mentor

Adriane Jones

Start Date

18-11-2017 2:15 PM

End Date

18-11-2017 3:15 PM

Location

BSC-Ursa Minor 61

Session

Poster 3

Type of Presentation

Poster

Subject Area

biological_agricultural_sciences

Abstract

The revitalization of the Los Angeles River is gaining attention as a civic and community resource. The 51 miles of L.A. River starts in the Sepulveda basin, winds its way through the Glendale Narrows, through the City of Industry and empties into the Long Beach Estuary. The river is predominantly fed by runoff and wastewater treatment outflows and has areas with both soft (natural) and concretized banks and bottoms. Little is known about the biology of the Los Angeles River and how channelized portions of the river differ from soft-bottom areas. Over the course of 3 weeks in the summer of 2017 we sampled 10 sites along the River and measured in-situ temperature, pH, salinity, dissolved oxygen, and collected samples for nitrate, phosphorous, ammonia, chlorophyll, and 16S rDNA community sequencing. Nitrate measurements ranged from 0.3 to 4 mg/L of nitrogen, and ammonia ranged from 0.05 to 0.2 mg/L nitrogen. Phosphate measurements ranged from 34 to 1000 mg/L phosphorous. The diversity of bacteria was high and varied with location. For future research we would like to collect samples throughout the year to detect seasonal changes as well as spatial changes.

Summary of research results to be presented

Nitrate measurements ranged from 0.3 to 4 mg/L of nitrogen, and ammonia ranged from 0.05 to 0.2 mg/L nitrogen. Phosphate measurements ranged from 34 to 1000 mg/L phosphorous. The diversity of bacteria was high and varied with location. For future research we would like to collect samples throughout the year to detect seasonal changes as well as spatial changes.

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Nov 18th, 2:15 PM Nov 18th, 3:15 PM

Characterizing the microbiology of the Los Angeles River: from the Sepulveda basin to Golden Shores.

BSC-Ursa Minor 61

The revitalization of the Los Angeles River is gaining attention as a civic and community resource. The 51 miles of L.A. River starts in the Sepulveda basin, winds its way through the Glendale Narrows, through the City of Industry and empties into the Long Beach Estuary. The river is predominantly fed by runoff and wastewater treatment outflows and has areas with both soft (natural) and concretized banks and bottoms. Little is known about the biology of the Los Angeles River and how channelized portions of the river differ from soft-bottom areas. Over the course of 3 weeks in the summer of 2017 we sampled 10 sites along the River and measured in-situ temperature, pH, salinity, dissolved oxygen, and collected samples for nitrate, phosphorous, ammonia, chlorophyll, and 16S rDNA community sequencing. Nitrate measurements ranged from 0.3 to 4 mg/L of nitrogen, and ammonia ranged from 0.05 to 0.2 mg/L nitrogen. Phosphate measurements ranged from 34 to 1000 mg/L phosphorous. The diversity of bacteria was high and varied with location. For future research we would like to collect samples throughout the year to detect seasonal changes as well as spatial changes.