2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/22/2018 | 12:00 PM - 12:15 PM | DYNAMICS OF MACROINVERTEBRATE DRIFT IN STREAM NETWORKS | 420 A
DYNAMICS OF MACROINVERTEBRATE DRIFT IN STREAM NETWORKS
While the importance of drift is well documented, it is unclear how drift behavior varies with position in a stream network and what this variation means for community assembly dynamics. Based on the results of previous theoretical and empirical work, we predicted that similarity between drift and the benthic community would be higher in headwaters than in mainstems.We also predicted that drift density, richness, and diversity would be higher in mainstems than tributaries. As a corollary, we also predicted that drift in higher order streams would be less similar to the benthos because of dispersal pressure from connecting tributaries. We collected drift samples along two sites in one river networks in Virginia at an incoming first order tributary and 20m away in the mainstem. We collected drift samples for after sunset and benthic samples after each drift sample. Preliminary results showed that drift density and richness was higher in the mainstems than tributaries, although only drift density was significant. Diversity showed an opposite pattern, with tributaries having a higher diversity than mainstems. As further analysis continues, how drift differs within a network will become more clear.
- Connectivity
- Invertebrate
- Network
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
Savannah Justus
(), Virginia Tech, sjustus1@vt.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Sara Cathey
(), Virginia Tech, catheyse@vt.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Bryan Brown
(), Virginia Tech, stonefly@vt.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -