2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/23/2018 | 10:15 AM - 10:30 AM | THERMAL CONDITION OF TWO SANTA MONICA MOUNTAIN TROUT STREAMS IN PERSISTENT DROUGHT | 410 A
THERMAL CONDITION OF TWO SANTA MONICA MOUNTAIN TROUT STREAMS IN PERSISTENT DROUGHT
Adverse effects of rising global average temperatures to freshwater habitat conditions will be pronounced in Mediterranean climates such as the Santa Monica Mountains (Dallas 2013). Despite uncertainty in establishing precise thermal thresholds for southern California O. mykiss, this species is vulnerable to dry-season or drought-related temperature change approaching or exceeding tolerance limits, as low flows prohibit access to refuge habitats (Spina 2007). The objective of this study was to examine the relationship between drought and freshwater temperature in two Santa Monica Mountain streams, and potential for thermal stress to native O. mykiss populations. Dry season water temperatures were monitored 2011 to 2016 and compared to local weather data and stream habitat conditions (air temperature and humidity, annual rainfall, daily mean flow and pool drying), to identify potential change to thermal suitability of wetted stream habitat.
- Habitat
- Drying
- Connectivity
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Presenters/Authors
Elizabeth Montgomery
(), Resource Conservation District Santa Monica Mountains / Michigan Technological University, montgomerylizzy@gmail.com;
ASHA DISCLOSURE:
Financial -
Nonfinancial -