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| Web URL(s): | https://dl.sciencesocieties.org/publications/jeq/articles/38/4/1429
Last checked: 11/07/2016
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| Publication Type:
| Refereed |
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| Author(s): | Roach, W. John;
Grimm, Nancy B. |
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| Author Affiliation: | Roach: SimBiotic Software, Missoula, Montana; Grimm: School of Life Sciences Arizona State University, Tempe, Arizona |
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| Title: | Nutrient variation in an Urban Lake Chain and its consequences for phytoplankton production |
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| Section: | Technical reports: Organic compounds in the environment
Other records with the "Technical reports: Organic compounds in the environment" Section
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| Source: | Journal of Environmental Quality. Vol. 38, No. 4, July/August 2009, p. 1429-1440. |
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| Publishing Information: | Madison, Wisconsin: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America |
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| # of Pages: | 12 |
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| Keywords: | TIC Keywords: Ecosystems; Streams; Groundwater contamination; Groundwater; Phosphorus; Nitrogen; Nutrient availability
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| Abstract/Contents: | "In the Central Arizona-Phoenix (CAP) ecosystem, managers divert mixed stream water and groundwater to maintain an artificial lake chain in Indian Bend Wash (IBW), a historically flashy, ephemeral, desert stream. Nutrient concentrations in the CAP ecosystem's groundwater, stream water, and floodwater differ: stream water has low concentrations of both inorganic N and P, while groundwater is low in inorganic P ut rich in nitrate (NO3). Consequently, groundwater contribution drives inorganic N concentrations in the lake chain. In contrast, floodwater typically has high P concentrations while remaining low in N. Thus we expected N and P concentrations in IBW lakes to vary with the mix of water flowing through them. Elevated NO3- and low inorganic P concentrations were predicted changes in water chemistry would affect nutrient limitation of phytoplankton. Laboratory nutrient-addition bioassays demonstrated that phytoplankton growth was P-limited thorughout the summer of 2003 when N/P below was high. However, after a late-season flood drove N/P below 31:1, the expected threshold between N and P limitation, N limitation was observed. Our results indicate that effects of floods, the preeminent historic drivers of Sonoran Desert stream biogeochemisty, are mitigated in urban ecosystems by decisions about which spigots to turn. Consequently, nutrient limitation of urban streams is driven as much by management decisions as by natural hydrologic variation." |
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| Language: | English |
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| References: | 50 |
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| Note: | Graphs
Figures
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Roach, W. J., and N. B. Grimm. 2009. Nutrient variation in an Urban Lake Chain and its consequences for phytoplankton production. J. Environ. Qual. 38(4):p. 1429-1440. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/jeq/articles/38/4/1429
Last checked: 11/07/2016
Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/jeq/pdfs/38/4/1429
Last checked: 11/10/2016
Requires: PDF Reader
Access conditions: Item is within a limited access website |
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MSU catalog number: b2225072a |
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