EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/24/2021 | 2:00 PM - 3:30 PM | DOES THE PROPORTION OF METALS SHED IN EXUVIAE BY EMERGING DRAGONFLIES TEMPORALLY VARY THROUGHOUT THE FLYING SEASON? | Virtual Platform
DOES THE PROPORTION OF METALS SHED IN EXUVIAE BY EMERGING DRAGONFLIES TEMPORALLY VARY THROUGHOUT THE FLYING SEASON?
When a dragonfly aquatic nymph emerges from a wetland, metals can be shed with their exuviae (nymph exoskeleton) or be incorporated into their body and enter the terrestrial food web as emergents fly away. Many dragonfly species emerge throughout an extended flying season, typically spring through late summer. Water quality in constructed wetlands can also temporally vary, particularly over the plant growing season that largely coincides with the dragonfly flying season. Consequently, burdens of metals accumulating in the emerging dragonfly or shed exuviae may vary throughout the season. We previously established elevated levels of metals in dragonfly nymphs from a constructed wetland on the Savannah River Site, SC, USA. We evaluated metal concentrations and masses of 12 metals accumulating in emergents and shed exuviae of three dragonfly species throughout a season. Whether higher concentrations of a specific element accumulated in the emergent versus exuviae was generally consistent among species and collection periods. However, substantial temporal differences in metal accumulation in both emergents and exuviae were observed. Generally, differences occurred in individual sampling events rather than gradual trends throughout the season. Patterns in metal accumulation were both element and species specific.
- Monitoring
- Aquatic–terrestrial biodiversity
- Pollution
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Presenters/Authors
Dean Fletcher
(), Savannah River Ecology Laboratory-University of Georgia, fletcher@srel.uga.edu;
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Christina Fulghum
(), Savannah River Ecology Laboratory-University of Georgia, cfulghum@uga.edu;
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Angela Lindell
(), Savannah River Ecology Laboratory-University of Georgia, lindell@srel.uga.edu;
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Paul Stankus
(), Savannah River Ecology Laboratory-University of Georgia, stankus@srel.uga.edu;
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Erin Spivey
(), Savannah River Ecology Laboratory--UGA, Erin.Spivey@uga.edu;
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