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ARS Home » Southeast Area » Fayetteville, Arkansas » Poultry Production and Product Safety Research » Research » Publications at this Location » Publication #171972
Title: NUTRIENT LIMITATION OF PHYTOPLANKTON AND PERIPHYTON AT LAKE EUCHA, NORTHEAST OKLAHOMA, USA

Author
item AVERY, RAY - UNIVERSITY OF ARKANSAS
item Haggard, Brian
item MATLOCK, MARTY - UNIVERSITY OF ARKANSAS

Submitted to: Proceedings of American Society of Agricultural Engineers
Publication Type: Proceedings
Publication Acceptance Date: 5/1/2004
Publication Date: 8/1/2004
Citation: Avery, R.S., Haggard, B.E., Matlock, M.D. 2004. Nutrient limitation of phytoplankton and periphyton at Lake Eucha, Northeast Oklahoma, USA. In: Proceedings of American Society of Agricultural Engineers, August 1-4, 2004, Ottawa, Ontario, Canada. 2004 CDROM.

Interpretive Summary:

Technical Abstract: Anthropogenic eutrophication is often associated with phosphorus loss from the landscape to streams and reservoirs, particularly from pastures fertilized with animal manure in the Ozarks, USA. Thus, phosphorus concentrations and loads are assumed to be the limiting factor regulating algal production in reservoirs. We evaluated nutrient limitation of phytoplankton and periphyton in a small eutrophic impoundment (Lake Eucha) in the Ozarks of Northeast Oklahoma, USA. Nutrient limitation was determined using floating enclosures (gas permeable polyethylene) for phytoplankton and passive diffusion periphytometers for periphyton. Some distinct spatial and temporal differences in ambient water quality and nutrient limitation bioassays were observed. Water chemistry was generally similar between the riverine and lacustrine sites during the deployment, except NO3 was greater at the riverine zone in November 2003. Algal growth at the riverine and lacustrine sites was apparently limited by the availability of N and P. However, N limitation was generally shown in the phytoplankton enclosures in July and September 2003 whereas P limitation was generally shown with the passive diffusion periphytometers during these deployments. In November 2003, a chlorophyll a response was not observed with nutrient enrichment using the passive diffusion periphytometers. This lack of algal response may be attributed to significant increases in the dissolved nutrient supply near the surface water'air interface following reservoir fall mixis.