Long‐term nutrient addition alters arthropod community composition but does not increase total biomass or abundance
Author Posting. © The Author(s), 2017. This is the author's version of the work. It is posted here by permission of John Wiley & Sons for personal use, not for redistribution. The definitive version was published in Oikos 127 (2018): 460-471, doi:10.1111/oik.04398. A simple bottom–up hypoth...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/10232 2023-05-15T15:02:02+02:00 Long‐term nutrient addition alters arthropod community composition but does not increase total biomass or abundance Asmus, Ashley Koltz, Amanda McLaren, Jennie Shaver, Gaius R. Gough, Laura 2017-09 https://hdl.handle.net/1912/10232 en_US eng https://doi.org/10.1111/oik.04398 https://hdl.handle.net/1912/10232 Preprint 2017 ftwhoas https://doi.org/10.1111/oik.04398 2022-05-28T23:00:21Z Author Posting. © The Author(s), 2017. This is the author's version of the work. It is posted here by permission of John Wiley & Sons for personal use, not for redistribution. The definitive version was published in Oikos 127 (2018): 460-471, doi:10.1111/oik.04398. A simple bottom–up hypothesis predicts that plant responses to nutrient addition should determine the response of consumers: more productive and less diverse plant communities, the usual result of long‐term nutrient addition, should support greater consumer abundances and biomass and less consumer diversity. We tested this hypothesis for the response of an aboveground arthropod community to an uncommonly long‐term (24‐year) nutrient addition experiment in moist acidic tundra in arctic Alaska. This experiment altered plant community composition, decreased plant diversity and increased plant production and biomass as a deciduous shrub, Betula nana, became dominant. Consistent with strong effects on the plant community, nutrient addition altered arthropod community composition, primarily through changes to herbivore taxa in the canopy‐dwelling arthropod assemblage and detritivore taxa in the ground assemblage. Surprisingly, however, the loss of more than half of plant species was accompanied by negligible changes to diversity (rarefied richness) of arthropod taxa (which were primarily identified to family). Similarly, although long‐term nutrient addition in this system roughly doubles plant production and biomass, arthropod abundance was either unchanged or decreased by nutrient addition, and total arthropod biomass was unaffected. Our findings differ markedly from the handful of terrestrial studies that have found bottom‐up diversity cascades and productivity responses by consumers to nutrient addition. This is probably because unlike grasslands and salt marshes (where such studies have historically been conducted), this arctic tundra community becomes less palatable, rather than more so, after many years of nutrient addition due to increased ... Report Arctic Betula nana Tundra Alaska Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Arctic Oikos 127 3 460 471 |
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Open Polar |
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Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
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ftwhoas |
language |
English |
description |
Author Posting. © The Author(s), 2017. This is the author's version of the work. It is posted here by permission of John Wiley & Sons for personal use, not for redistribution. The definitive version was published in Oikos 127 (2018): 460-471, doi:10.1111/oik.04398. A simple bottom–up hypothesis predicts that plant responses to nutrient addition should determine the response of consumers: more productive and less diverse plant communities, the usual result of long‐term nutrient addition, should support greater consumer abundances and biomass and less consumer diversity. We tested this hypothesis for the response of an aboveground arthropod community to an uncommonly long‐term (24‐year) nutrient addition experiment in moist acidic tundra in arctic Alaska. This experiment altered plant community composition, decreased plant diversity and increased plant production and biomass as a deciduous shrub, Betula nana, became dominant. Consistent with strong effects on the plant community, nutrient addition altered arthropod community composition, primarily through changes to herbivore taxa in the canopy‐dwelling arthropod assemblage and detritivore taxa in the ground assemblage. Surprisingly, however, the loss of more than half of plant species was accompanied by negligible changes to diversity (rarefied richness) of arthropod taxa (which were primarily identified to family). Similarly, although long‐term nutrient addition in this system roughly doubles plant production and biomass, arthropod abundance was either unchanged or decreased by nutrient addition, and total arthropod biomass was unaffected. Our findings differ markedly from the handful of terrestrial studies that have found bottom‐up diversity cascades and productivity responses by consumers to nutrient addition. This is probably because unlike grasslands and salt marshes (where such studies have historically been conducted), this arctic tundra community becomes less palatable, rather than more so, after many years of nutrient addition due to increased ... |
format |
Report |
author |
Asmus, Ashley Koltz, Amanda McLaren, Jennie Shaver, Gaius R. Gough, Laura |
spellingShingle |
Asmus, Ashley Koltz, Amanda McLaren, Jennie Shaver, Gaius R. Gough, Laura Long‐term nutrient addition alters arthropod community composition but does not increase total biomass or abundance |
author_facet |
Asmus, Ashley Koltz, Amanda McLaren, Jennie Shaver, Gaius R. Gough, Laura |
author_sort |
Asmus, Ashley |
title |
Long‐term nutrient addition alters arthropod community composition but does not increase total biomass or abundance |
title_short |
Long‐term nutrient addition alters arthropod community composition but does not increase total biomass or abundance |
title_full |
Long‐term nutrient addition alters arthropod community composition but does not increase total biomass or abundance |
title_fullStr |
Long‐term nutrient addition alters arthropod community composition but does not increase total biomass or abundance |
title_full_unstemmed |
Long‐term nutrient addition alters arthropod community composition but does not increase total biomass or abundance |
title_sort |
long‐term nutrient addition alters arthropod community composition but does not increase total biomass or abundance |
publishDate |
2017 |
url |
https://hdl.handle.net/1912/10232 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Betula nana Tundra Alaska |
genre_facet |
Arctic Betula nana Tundra Alaska |
op_relation |
https://doi.org/10.1111/oik.04398 https://hdl.handle.net/1912/10232 |
op_doi |
https://doi.org/10.1111/oik.04398 |
container_title |
Oikos |
container_volume |
127 |
container_issue |
3 |
container_start_page |
460 |
op_container_end_page |
471 |
_version_ |
1766334031857713152 |