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Journal article
Effects of nitrogen on temporal and spatial patterns of nitrate in streams and soil solution of a central hardwood forest
International Scholarly Research Network (ISRN) Ecology, 138487
2011
Abstract
This study examined changes in stream and soil water NO₃⁻ and their relationship to temporal and spatial patterns of NO₃⁻ in soil solution of watersheds at the Fernow Experimental Forest, West Virginia. Following tenfold increases in stream NO₃⁻
concentrations over a 13-year period (1969–1981) on untreated WS4, concentrations have declined through 2006. Following fourfold increases in stream NO₃⁻ on treatment WS3 from pretreatment levels to a 1998 maximum, concentrations have declined through 2006, despite additions of N. Concentrations of soil water NO₃⁻ were consistently lower for WS4 compared to WS3. Data for soil water NO₃⁻ on WS3 versus WS4 followed patterns of net mineralization and nitrification for these watersheds. Nitrogen additions to WS3 decreased spatial heterogeneity of N processing, which was largest in the pretreatment year and decreased significantly to a minimum by 2000-2001. Concurrently, soil water NO₃⁻ increased on WS3 from 1.3mg NO₃⁻-N L⁻¹ in pretreatment 1989 to a maximum of 6.4mg NO₃⁻-N L⁻¹ in 2001. Spatial heterogeneity in soil water NO₃⁻ on WS4 remained high during this period. Data suggest that temporal patterns of stream NO₃⁻ may be influenced by spatial heterogeneity of watershed processes which vary over time in response to N availability.
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- Title
- Effects of nitrogen on temporal and spatial patterns of nitrate in streams and soil solution of a central hardwood forest
- Publication Details
- International Scholarly Research Network (ISRN) Ecology, 138487
- Resource Type
- Journal article
- Publisher
- Hindawi Publishing Corporation; United States
- Copyright
- Copyright © 2011 F. S. Gilliam and M. B. Adams. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
- Identifiers
- 99380090766206600
- Academic Unit
- Hal Marcus College of Science and Engineering ; Biology
- Language
- English