Please use this identifier to cite or link to this item:
http://hdl.handle.net/10261/37323
Share/Export:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Title: | Can uptake length in streams be determined by nutrient addition experiments? Results from an inter-biome comparison study |
Authors: | Mulholland, P. J.; Tank, J. L.; Webster, J. R.; Bowden, W. B.; Dodds, W. K.; Gregory, S.; Grimm, Nancy B. CSIC ORCID; Hamilton, S. K.; Johnson, S. L.; Martí, Eugènia ; McDowell, W. H.; Merrian, J.; Meyer, J. L.; Peterson, Bruce J.; Valett, H. M.; Wollheim, W. M. | Keywords: | Stream Ammonium Uptake length Nutrient cycling Nutrient spiraling Nitrogen limitation |
Issue Date: | Dec-2002 | Publisher: | North American Benthological Society | Citation: | Journal of the North American Benthological Society 21(4) : 544-560 (2002) | Abstract: | Nutrient uptake length is an important parameter for quantifying nutrient cycling in streams. Although nutrient tracer additions are the preferred method for measuring uptake length under ambient nutrient concentrations, short-term nutrient addition experiments have more frequently been used to estimate uptake length in streams. Theoretical analysis of the relationship between uptake length determined by nutrient addition experiments (SW′) and uptake length determined by tracer additions (SW) predicted that SW′ should be consistently longer than SW, and that the overestimate of uptake length by SW′ should be related to the level of nutrient addition above ambient concentrations and the degree of nutrient limitation. To test these predictions, we used data from an interbiome study of NH4+ uptake length in which 15NH4+ tracer and short-term NH4+ addition experiments were performed in 10 streams using a uniform experimental approach. The experimental results largely confirmed the theoretical predictions: SW′ was consistently longer than SW and SW′:SW ratios were directly related to the level of NH4+ addition and to indicators of N limitation. The experimentally derived SW′:SW ratios were used with the theoretical results to infer the N limitation status of each stream. Together, the theoretical and experimental results showed that tracer experiments should be used whenever possible to determine nutrient uptake length in streams. Nutrient addition experiments may be useful for comparing uptake lengths between different streams or different times in the same stream, however, provided that nutrient additions are kept as low as possible and of similar magnitude. | Publisher version (URL): | http://dx.doi.org/10.2307/1468429 | URI: | http://hdl.handle.net/10261/37323 | DOI: | 10.2307/1468429 | ISSN: | 0887-3593 |
Appears in Collections: | (CEAB) Artículos |
Show full item record
CORE Recommender
SCOPUSTM
Citations
185
checked on Mar 9, 2024
WEB OF SCIENCETM
Citations
168
checked on Feb 29, 2024
Page view(s)
416
checked on Mar 27, 2024
Google ScholarTM
Check
Altmetric
Altmetric
WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.