2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/21/2019 | 9:30 AM - 9:45 AM | BIOASSESSMENT OF EPHEMERAL STREAMS AND INTERMITTENT RIVERS AFFECTED BY OIL SPILLS | 151 G
BIOASSESSMENT OF EPHEMERAL STREAMS AND INTERMITTENT RIVERS AFFECTED BY OIL SPILLS
Dry stream ecosystems are an important component of freshwater systems. We have just begun to develop bioassessment tools for these systems impacted by oil spills, but we do not yet understand how biota respond to severe alterations like those associated with resource extraction. We examined how bryophyte and arthropod assemblages responded across a gradient of increasing amounts of upstream oil and gas extraction along with physical and chemical measurements of ephemeral streams near Bakersfield, CA. We quantified the amount of stress using GIS and hydrocarbon soil concentrations and related this stress to potential biological end points possibly sensitive to alteration. We found that the abundance of bryophytes and arthropods increased with increasing extraction stress, while richness of arthropods increased for stressed sites but did not differ for bryophytes. This information gives us a deeper understanding for the role of dry streams within the freshwater network and how these ecosystems respond to stress. These results also support the development of tools like these that resource agencies can use for monitoring and assessing freshwater ecosystems when they are dry.
- Intermittency
- Watershed
- Invertebrate
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Presenters/Authors
Savannah Johnson
(), California State University Monterey Bay, Johnson.savannah123@gmail.com;
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Raphael Mazor
(), Southern California Coastal Water Research Project, raphaelm@sccwrp.org;
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John Olson
(), Dept of Applied Environmental Science, California State University Monterey Bay, CA, USA, joolson@csumb.edu;
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