Responses of a beaded Arctic stream to short‐term N and P fertilisation
Summary 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...
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crwiley:10.1111/j.1365-2427.2004.01319.x 2024-06-02T08:01:19+00:00 Responses of a beaded Arctic stream to short‐term N and P fertilisation BENSTEAD, JONATHAN P. DEEGAN, LINDA A. PETERSON, BRUCE J. HURYN, ALEXANDER D. BOWDEN, WILLIAM B. SUBERKROPP, KELLER BUZBY, KAREN M. GREEN, ADRIAN C. VACCA, JAY A. 2004 http://dx.doi.org/10.1111/j.1365-2427.2004.01319.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2427.2004.01319.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2427.2004.01319.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Freshwater Biology volume 50, issue 2, page 277-290 ISSN 0046-5070 1365-2427 journal-article 2004 crwiley https://doi.org/10.1111/j.1365-2427.2004.01319.x 2024-05-03T10:56:07Z Summary 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 μ m ammonium‐N and 0.45 μ m soluble reactive P. Concentrations upstream of the dripper averaged 0.54 μ m ammonium‐N and 0.03 μ m 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. 3. Fertilisation resulted in four‐ to sevenfold higher macroinvertebrate abundance and two‐ to fourfold higher macroinvertebrate biomass in litter bags, as well as an increase in late‐summer body mass of larval Nemoura stoneflies. 4. Our results are consistent with those of similar studies of larger streams in the high‐Arctic region. Based on our short‐term experiment, increased inputs of nutrients into these ecosystems, whether caused by climate change or more local disturbance, are likely to have profound ecological consequences. Longer‐term effects of enrichment, and their interaction with other components of future change in climate or land use, are more difficult to assess. Article in Journal/Newspaper Arctic Climate change Tundra Wiley Online Library Arctic Freshwater Biology 50 2 277 290 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Summary 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 μ m ammonium‐N and 0.45 μ m soluble reactive P. Concentrations upstream of the dripper averaged 0.54 μ m ammonium‐N and 0.03 μ m 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. 3. Fertilisation resulted in four‐ to sevenfold higher macroinvertebrate abundance and two‐ to fourfold higher macroinvertebrate biomass in litter bags, as well as an increase in late‐summer body mass of larval Nemoura stoneflies. 4. Our results are consistent with those of similar studies of larger streams in the high‐Arctic region. Based on our short‐term experiment, increased inputs of nutrients into these ecosystems, whether caused by climate change or more local disturbance, are likely to have profound ecological consequences. Longer‐term effects of enrichment, and their interaction with other components of future change in climate or land use, are more difficult to assess. |
format |
Article in Journal/Newspaper |
author |
BENSTEAD, JONATHAN P. DEEGAN, LINDA A. PETERSON, BRUCE J. HURYN, ALEXANDER D. BOWDEN, WILLIAM B. SUBERKROPP, KELLER BUZBY, KAREN M. GREEN, ADRIAN C. VACCA, JAY A. |
spellingShingle |
BENSTEAD, JONATHAN P. DEEGAN, LINDA A. PETERSON, BRUCE J. HURYN, ALEXANDER D. BOWDEN, WILLIAM B. SUBERKROPP, KELLER BUZBY, KAREN M. GREEN, ADRIAN C. VACCA, JAY A. Responses of a beaded Arctic stream to short‐term N and P fertilisation |
author_facet |
BENSTEAD, JONATHAN P. DEEGAN, LINDA A. PETERSON, BRUCE J. HURYN, ALEXANDER D. BOWDEN, WILLIAM B. SUBERKROPP, KELLER BUZBY, KAREN M. GREEN, ADRIAN C. VACCA, JAY A. |
author_sort |
BENSTEAD, JONATHAN P. |
title |
Responses of a beaded Arctic stream to short‐term N and P fertilisation |
title_short |
Responses of a beaded Arctic stream to short‐term N and P fertilisation |
title_full |
Responses of a beaded Arctic stream to short‐term N and P fertilisation |
title_fullStr |
Responses of a beaded Arctic stream to short‐term N and P fertilisation |
title_full_unstemmed |
Responses of a beaded Arctic stream to short‐term N and P fertilisation |
title_sort |
responses of a beaded arctic stream to short‐term n and p fertilisation |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.1111/j.1365-2427.2004.01319.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2427.2004.01319.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2427.2004.01319.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Tundra |
genre_facet |
Arctic Climate change Tundra |
op_source |
Freshwater Biology volume 50, issue 2, page 277-290 ISSN 0046-5070 1365-2427 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2427.2004.01319.x |
container_title |
Freshwater Biology |
container_volume |
50 |
container_issue |
2 |
container_start_page |
277 |
op_container_end_page |
290 |
_version_ |
1800745619973734400 |