EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/21/2019 | 11:15 AM - 11:30 AM | HYPORHEIC SECONDARY PRODUCTION AND LIFE HISTORY OF A COMMON STONEFLY IN AN OZARK STREAM | 250 DE
HYPORHEIC SECONDARY PRODUCTION AND LIFE HISTORY OF A COMMON STONEFLY IN AN OZARK STREAM
Hyporheic zones are ecologically important in part because they provide aquatic macroinvertebrates with unique habitat and refuge from flow extremes. Stoneflies are known hyporheic inhabitants. We collected hyporheic samples monthly (January to September 2018) from 30-45cm below the streambed from the mainstem and an ephemeral tributary of an Ozark stream. We tracked a population of common stoneflies, Leuctra tenuis, to describe their life history and estimate secondary production in the hyporheic zone per unit area of streambed. Secondary production of hyporheic L. tenuis was ~19 mg m-2yr-1 and development took about 8 months in the main channel with early instars appearing in February and adults emerging in September. We found differences in L. tenuis development rate between the thermally distinct mainstem and ephemeral tributary hyporheic habitats, indicating that L. tenuis development responds strongly to accumulated degree days. Mainstem nymphs reached maturity two weeks earlier, but mature nymphs appeared in both habitats after the same number of degree days accumulated since January (~4020 DD). Studying life histories of hyporheic insects will improve understanding of how the hyporheic zone affects whole-stream processes, such as energy availability for aquatic and riparian food webs.
- Secondary Production
- Life History
- Invertebrate
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
Nathan Dorff
(), Missouri State University, natedorff@gmail.com;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Debra Finn
(), Missouri State University, dfinn@missouristate.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -