2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/25/2021 | 8:30 AM - 10:30 AM | LAND USE EFFECT ON DENITRIFICATION AND METABOLISM IN SIX KANSAS STREAMS | Virtual Platform
LAND USE EFFECT ON DENITRIFICATION AND METABOLISM IN SIX KANSAS STREAMS
Agriculture drainage from fertilizers results in nutrient supply into surrounding streams consequentially creating poor stream health. We want to better understand how nitrogen cycling and metabolism are connected in headwater streams affected by land use. In this study we ask: how does land use affect in-stream denitrification, nitrogen concentrations, and ecosystem metabolism? We sampled six streams in northeast Kansas: three grassland vs. three cropland. To understand in-stream nitrogen processes and metabolism, we measured diel (day to night) patterns of nitrate concentrations and dissolved gases (oxygen, argon, di-nitrogen, and nitrous oxide) to quantify denitrification, gross primary production, and ecosystem respiration. As predicted, streams predominantly cropland had higher nitrate concentrations and more denitrification relative to grassland streams. Ecosystem respiration and gross primary production rates varied more among cropland land use, likely due to flux of nitrogen inputs. This study is important as the Kickapoo Tribe in Kansas depends on surface water within this watershed for drinking water purposes. The findings from this study can be applied to communities to inform management implications for water quality.
- Land use
- Nutrient cycling
- Stream
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Presenters/Authors
Kynser Wahwahsuck
(), University of Kansas, kwahwah11@gmail.com;
ASHA DISCLOSURE:
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Nonfinancial -
Amy Burgin
(), University of Kansas, burginam@ku.edu;
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