2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/21/2018 | 10:15 AM - 10:30 AM | SURFACE WATER AVAILABILITY CAN REGULATE WATER QUALITY AND NUTRIENT RETENTION IN AQUATIC AGROECOSYSTEMS | 410 B
SURFACE WATER AVAILABILITY CAN REGULATE WATER QUALITY AND NUTRIENT RETENTION IN AQUATIC AGROECOSYSTEMS
Surface water quantity in agricultural landscapes is changing due to increased irrigation demands, changing precipitation patterns, and advancing water use strategies. Understanding the implications of surface water depth on aquatic ecosystem structure and function is key to maintaining biodiversity and water quality, and potentially optimizing services such as nutrient retention. Continuous water quality and hydrologic monitoring, and a series of discrete experiments occurred in three shallow lake/stream systems in heavily agricultural northwest Mississippi from 2011 to 2017. Lake and stream water depth and runoff patterns were important drivers of dissolved oxygen and nutrient dynamics in these hypereutrophic, highly turbid systems. Generally, lower water levels led to overall greater benthic primary production and lower water column nutrients, but also produced overall lower and more variable dissolved oxygen concentrations. Runoff pollutants, particularly sediment, carbon, and nitrogen, were important triggers of state changes in primary producer distribution and abundance, hypoxia, and denitrification potential within lakes. As water management strategies increasingly manipulate surface water storage and move water across watersheds, there is potential to manage surface water quantity to maximize aquatic ecosystem services, while maintaining multi-use goals in agricultural landscapes.
- Landuse
- Multi-stressors
- Primary Production
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
Justin Murdock
(), Tennessee Tech University, jnmurdock@tntech.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Martin Locke
(), USDA-ARS, martin.locke@ars.usda.gov ;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Richard Lizotte
(), USDA, Agricultural Research Service, National Sedimentation Lab , richard.lizotte@ars.usda.gov;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Jason M. Taylor
(), USDA, Agricultural Research Service, National Sedimentation Lab, jason.taylor@ars.usda.gov;
ASHA DISCLOSURE:
Financial -
Nonfinancial -