2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/23/2019 | 11:00 AM - 11:15 AM | LINKING ARTEMIA TO THE BENTHOS: DO MICROBIALITES SUPPORT BRINE SHRIMP PRODUCTION IN THE GREAT SALT LAKE | 250 DE
LINKING ARTEMIA TO THE BENTHOS: DO MICROBIALITES SUPPORT BRINE SHRIMP PRODUCTION IN THE GREAT SALT LAKE
Benthic primary production is recognized as an important foundation of lake food webs. However, our understanding of benthic resource contributions in inland saline lakes, which contain as much water as freshwater lakes on a global scale and provide important resources for birds, is incomplete. The Great Salt Lake (GSL; Utah, USA), an important stop-over site for migratory birds, contains abundant brine shrimp (Artemia franciscana) that primarily feed on phytoplankton. By mid-summer, brine shrimp have overgrazed this primary food source, and the only alternate food source comes from benthic primary production, which in GSL occurs on microbialites, carbonate rock structures formed by bacteria and algae. This research examines the contribution of microbialite algae as a food source for brine shrimp during summer phytoplankton depletion. Preliminary carbon and nitrogen stable isotope ratios indicate that brine shrimp rely on an increasing proportion of benthic resources during summer, while pelagic resources are consumed earlier in the spring. This research complements laboratory feeding experiments that suggest brine shrimp can survive when only benthic resources are available and will be used to inform managers of the importance of benthos to brine shrimp production in the GSL.
- Food Webs
- Isotope
- Periphyton
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Presenters/Authors
Katherine L. Barrett
(), University of Notre Dame, kbailey9@nd.edu;
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Gary E. Belovsky
(), University of Notre Dame, gbelovsk@nd.edu;
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