2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/23/2019 | 10:00 AM - 10:15 AM | THE EFFECTS OF NUTRIENT AND LABILE CARBON ADDITIONS ON THE PRIMING OF LEAF LITTER DECOMPOSITION BY POND SEDIMENTS | 254 B
THE EFFECTS OF NUTRIENT AND LABILE CARBON ADDITIONS ON THE PRIMING OF LEAF LITTER DECOMPOSITION BY POND SEDIMENTS
Pond construction is a common anthropogenic modification to watersheds that is likely to alter organic matter processing. Our previous research has found that small ponds in central Virginia accumulate a large standing stock of terrestrial leaf litter (mean = 162 g AFDM m-2) that decomposes slowly (mean k = -0.0030 d-1). We have also found that leaf litter decomposition (measured as a change in toughness) is 42% faster when the litter is in contact with the pond sediments, indicating that the pond environment alters organic matter processing. In this experiment, we used microcosms to test the hypothesis that the accelerated leaf decomposition in the sediments was due to increased availability of inorganic N and P, and/or labile carbon in the sediment environment. Our results show that glucose additions did not alter decomposition rate (measured as the change in leaf toughness) but leaf decomposition rate was altered by N and P additions after 2 and 14 weeks of incubation. These results suggest that nutrient limitation more than labile carbon limitation affects the decomposition of terrestrial organic matter in the sediments of small ponds.
- Lentic
- Organic Matter
- Biogeochemistry
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
Alyssa Oppedisano
(), Longwood University, alyssa.oppedisano@live.longwood.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Gabrielle Huerta
(), Longwood University, gabrielle.huerta@live.longwood.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Kenneth Fortino
(), Longwood University, fortinok@longwood.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Matthew Waters
(), Auburn University, mwaters@auburn.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -