2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2021 | 2:00 PM - 3:30 PM | UNTANGLING TERRESTRIAL AND AQUATIC CONTROLS ON CARBON, NUTRIENTS, AND MICROORGANISMS IN ARCTIC STREAM NETWORKS | Virtual Platform
UNTANGLING TERRESTRIAL AND AQUATIC CONTROLS ON CARBON, NUTRIENTS, AND MICROORGANISMS IN ARCTIC STREAM NETWORKS
Many longitudinal differences in dissolved organic matter (DOM) exist in permafrost river networks. Downstream decreases in DOM biodegradability, age, and bulk concentration have been observed and interpreted as signs of in-stream microbial and photochemical processing. Alternatively or additionally, longitudinal patterns could be due to systematic differences in tributaries draining upland and lowland permafrost landscapes. Because vegetation type, flowpath, residence time, and microbial community differ with landscape position, the simple mixing of different water sources could create the observed longitudinal patterns of DOM in permafrost river networks. We tested this “dilution hypothesis” by quantifying DOM biodegradability and properties, microbial community, nutrient availability, and water chemistry in 140 catchments in Arctic Alaska ranging from 1-1000 km2. By comparing catchments of similar size but different landscape positions, we separated terrestrially-driven source effects from in-stream processing. We also used DNA amplicon sequencing to relate water chemistry and DOM biodegradability with microbial community.
- Carbon cycle
- Decomposition
- Microbial ecology
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
Griffin Houston
(), Brigham Young University, griffinahouston@gmail.com;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Rebecca Frei
(), Brigham Young University, Department of Plant and Wildlife Sciences, beccafrei@gmail.com;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Raymond Lee
(), Brigham Young University, raymond.lee@byu.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Tasha Griffin
(), Brigham Young University, natasha.a.griffin@gmail.com;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Erin Jones
(), Brigham Young University, erinfjones3@gmail.com;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Zachary Aanderud
(), Brigham Young University, zachary_aanderud@byu.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Arial Shogren
(), Department of Earth and Environmental Sciences, Michigan State University, shogrena@msu.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Frances Iannuci
(), University of Vermont, fiannucc@gmail.com;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Jay Zarnetske
(), Department of Earth and Environmental Sciences, Michigan State University, jpz@msu.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Samuel Bratsman
(), Brigham Young University, Department of Plant and Wildlife Sciences, sbratsmanx@gmail.com;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Benjamin Abbott
(), Brigham Young University, Department of Plant and Wildlife Sciences, benabbott@byu.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
William Breck Bowden
(), University of Vermont, breck.bowden@uvm.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -