Responses of a beaded Arctic stream to short--term N and P fertilization. Freshwater Biology 50:277--290
1. Oligotrophic Arctic streams are likely to be sensitive to changes in hydrology and nutrient inputs predicted to occur as a consequence of future climate and land use change. To investigate the potential consequences of nutrient enrichment for low-order Arctic streams, we added ammonium-N and phos...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.570.9287 2023-05-15T14:51:36+02:00 Responses of a beaded Arctic stream to short--term N and P fertilization. Freshwater Biology 50:277--290 Jonathan P. Benstead Linda A. Deegan Bruce J Peterson Alexander D. Huryn William B. Bowden Keller Suberkropp Karen M. Buzby Adrian C. Green Jay A. Vacca The Pennsylvania State University CiteSeerX Archives 2005 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.570.9287 http://bama.ua.edu/~jbenstead/Publications_files/FB Hershey copy.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.570.9287 http://bama.ua.edu/~jbenstead/Publications_files/FB Hershey copy.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://bama.ua.edu/~jbenstead/Publications_files/FB Hershey copy.pdf text 2005 ftciteseerx 2016-01-08T12:31:39Z 1. Oligotrophic Arctic streams are likely to be sensitive to changes in hydrology and nutrient inputs predicted to occur as a consequence of future climate and land use change. To investigate the potential consequences of nutrient enrichment for low-order Arctic streams, we added ammonium-N and phosphorous to a second-order beaded, tundra stream on Alaska’s north slope. We measured responses in nutrient chemistry, chlorophyll a standing crop, and in the breakdown and macroinvertebrate colonisation of leaf litter over a 38-day summer period. 2. During the addition, nutrient concentrations immediately downstream of the dripper averaged 6.4 lM ammonium-N and 0.45 lM soluble reactive P. Concentrations upstream of the dripper averaged 0.54 lM ammonium-N and 0.03 lM soluble reactive P. Uptake of both nutrients was rapid. Concentrations were reduced on average to 28 % (ammonium-N) and 15 % (inorganic P) of maximum values within 1500 m. Standing crops of chlorophyll a on standardised samplers were significantly higher by the end of the experiment. Breakdown rates of senescent willow (Salix sp.) and sedge (Carex sp.) litter and associated fungal biomass were also significantly increased by nutrient addition. Text Arctic Tundra Unknown Arctic |
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1. Oligotrophic Arctic streams are likely to be sensitive to changes in hydrology and nutrient inputs predicted to occur as a consequence of future climate and land use change. To investigate the potential consequences of nutrient enrichment for low-order Arctic streams, we added ammonium-N and phosphorous to a second-order beaded, tundra stream on Alaska’s north slope. We measured responses in nutrient chemistry, chlorophyll a standing crop, and in the breakdown and macroinvertebrate colonisation of leaf litter over a 38-day summer period. 2. During the addition, nutrient concentrations immediately downstream of the dripper averaged 6.4 lM ammonium-N and 0.45 lM soluble reactive P. Concentrations upstream of the dripper averaged 0.54 lM ammonium-N and 0.03 lM soluble reactive P. Uptake of both nutrients was rapid. Concentrations were reduced on average to 28 % (ammonium-N) and 15 % (inorganic P) of maximum values within 1500 m. Standing crops of chlorophyll a on standardised samplers were significantly higher by the end of the experiment. Breakdown rates of senescent willow (Salix sp.) and sedge (Carex sp.) litter and associated fungal biomass were also significantly increased by nutrient addition. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Jonathan P. Benstead Linda A. Deegan Bruce J Peterson Alexander D. Huryn William B. Bowden Keller Suberkropp Karen M. Buzby Adrian C. Green Jay A. Vacca |
spellingShingle |
Jonathan P. Benstead Linda A. Deegan Bruce J Peterson Alexander D. Huryn William B. Bowden Keller Suberkropp Karen M. Buzby Adrian C. Green Jay A. Vacca Responses of a beaded Arctic stream to short--term N and P fertilization. Freshwater Biology 50:277--290 |
author_facet |
Jonathan P. Benstead Linda A. Deegan Bruce J Peterson Alexander D. Huryn William B. Bowden Keller Suberkropp Karen M. Buzby Adrian C. Green Jay A. Vacca |
author_sort |
Jonathan P. Benstead |
title |
Responses of a beaded Arctic stream to short--term N and P fertilization. Freshwater Biology 50:277--290 |
title_short |
Responses of a beaded Arctic stream to short--term N and P fertilization. Freshwater Biology 50:277--290 |
title_full |
Responses of a beaded Arctic stream to short--term N and P fertilization. Freshwater Biology 50:277--290 |
title_fullStr |
Responses of a beaded Arctic stream to short--term N and P fertilization. Freshwater Biology 50:277--290 |
title_full_unstemmed |
Responses of a beaded Arctic stream to short--term N and P fertilization. Freshwater Biology 50:277--290 |
title_sort |
responses of a beaded arctic stream to short--term n and p fertilization. freshwater biology 50:277--290 |
publishDate |
2005 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.570.9287 http://bama.ua.edu/~jbenstead/Publications_files/FB Hershey copy.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_source |
http://bama.ua.edu/~jbenstead/Publications_files/FB Hershey copy.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.570.9287 http://bama.ua.edu/~jbenstead/Publications_files/FB Hershey copy.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766322748859088896 |