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Manuel-Faler CY, Minshall GW, Dunn RW, et al. In situ nitrogen enrichment experiments in two Idaho (U.S.A.) streams. Environ Monit Assess. 1984;4(1):67-79doi: 10.1007/BF01047622.
Manuel-Faler, C. Y., Minshall, G. W., Dunn, R. W., & Bruns, D. A. (1984). In situ nitrogen enrichment experiments in two Idaho (U.S.A.) streams. Environmental monitoring and assessment, 4(1), 67-79. https://doi.org/10.1007/BF01047622
Manuel-Faler, C Y, et al. "In situ nitrogen enrichment experiments in two Idaho (U.S.A.) streams." Environmental monitoring and assessment vol. 4,1 (1984): 67-79. doi: https://doi.org/10.1007/BF01047622
Manuel-Faler CY, Minshall GW, Dunn RW, Bruns DA. In situ nitrogen enrichment experiments in two Idaho (U.S.A.) streams. Environ Monit Assess. 1984 Mar;4(1):67-79. doi: 10.1007/BF01047622. PMID: 24259147.
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Environ Monit Assess. 1984 Mar;4(1):67-79. doi: 10.1007/BF01047622.

In situ nitrogen enrichment experiments in two Idaho (U.S.A.) streams.

Environmental monitoring and assessment

C Y Manuel-Faler, G W Minshall, R W Dunn, D A Bruns

Affiliations

  1. Department of Biology, Idaho State University, Pocatello, Idaho, USA.

PMID: 24259147 DOI: 10.1007/BF01047622

Abstract

We conducted a series ofin situ experimental nutrient additions in two Idaho streams: Deep Creek, a desert stream located in Southeastern Idaho, and Big Wood River, situated in a mountainous region of Central Idaho. In both streams, a homogeneous reach was partitioned into almost identical channels. This allowed us to vary nutrient levels and measure algal response in experiments uncomplicated by differences in other factors.Ammonium nitrate was added to the treatment channels in Deep Creek. After nine days,Cladophora glomerata still predominated in both the control and treatment channels and algal biomass was not statistically different between the two. In the Big Wood River experiment significant differences in chlorophylla concentrations were not detected among three treatments of differing nitrogen enrichment and the control for both natural and artificial substrates. Also chlorophylla levels were not correlated with nitrogen concentrations, and the composition of algal communities remained similar among all treatments.We conclude that macronutrient enrichment of streams does not necessarily result in an increase in algal density or a change in algal community structure so long as other factors, which may limit the use of nutrients by algae, remain unaltered. Our results suggest that light, current velocity, and macroinvertebrate grazing may account for the failure of the periphyton to respond toin situ additions of nitrogen (and phosphorus) in our study streams.

References

  1. J Water Pollut Control Fed. 1975 Jul;47(7):1870-9 - PubMed
  2. J Water Pollut Control Fed. 1975 Aug;47(8):2157-71 - PubMed

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