Food web assembly in isolated habitats: A study from recently emerged nunataks, Iceland
Allochthonous arthropods can sustain a local food web on seemingly barren land, but are nevertheless often neglected in studies of community assembly. In the present study, we investigated primary food web assembly on nunataks (ice-free areas) in a retreating glacier in Iceland. Nunataks enable stud...
Published in: | Basic and Applied Ecology |
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Language: | English |
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Online Access: | https://lup.lub.lu.se/record/3854862 https://doi.org/10.1016/j.baae.2012.12.002 |
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ftulundlup:oai:lup.lub.lu.se:a5aa3772-20e6-4f92-b832-b56514b6a324 2023-11-12T04:17:30+01:00 Food web assembly in isolated habitats: A study from recently emerged nunataks, Iceland Ingimarsdottir, Maria Ripa, Jörgen Magnusdottir, Olof Birna Hedlund, Katarina 2013 https://lup.lub.lu.se/record/3854862 https://doi.org/10.1016/j.baae.2012.12.002 eng eng Elsevier https://lup.lub.lu.se/record/3854862 http://dx.doi.org/10.1016/j.baae.2012.12.002 wos:000317352100009 scopus:84875400712 Basic and Applied Ecology; 14(2), pp 174-183 (2013) ISSN: 1618-0089 Ecology Allochthonous material Arthropods Assembly rules Biomass Colonisation Community assembly contributiontojournal/article info:eu-repo/semantics/article text 2013 ftulundlup https://doi.org/10.1016/j.baae.2012.12.002 2023-10-25T22:29:03Z Allochthonous arthropods can sustain a local food web on seemingly barren land, but are nevertheless often neglected in studies of community assembly. In the present study, we investigated primary food web assembly on nunataks (ice-free areas) in a retreating glacier in Iceland. Nunataks enable studies that take into account both the temporal factor of the assembly and the influx of allochthonous organisms. Arthropods were collected on sites of different age on five nunataks younger than 70 years, as well as the youngest parts of one old nunatak. The youngest sites had no vegetation and were dominated by detritivores and predators along with allochthonous arthropods. The arthropod biomass, that was considered established, increased with vegetation cover and site age but also differed among nunataks. To investigate whether or not the assembly of arthropods was consistent with the predictions of assembly rules, we tested whether, (1) the proportion of each trophic level changed non-randomly, (2) predator-prey ratio remained constant, and (3) larger species replaced smaller ones. We could only verify that proportions of trophic levels changed non-randomly. As assembly rules only apply for established organisms, it is possible that difficulties in determining whether e. g. generalist predators were established or not may affect the outcome of analyses of assembly rules. It is thus important to be aware that unintentional inclusion of allochthonous arthropods in models of community assembly may affect whether or not the community can be explained and predicted by assembly rules. Article in Journal/Newspaper glacier Iceland Lund University Publications (LUP) Basic and Applied Ecology 14 2 174 183 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Ecology Allochthonous material Arthropods Assembly rules Biomass Colonisation Community assembly |
spellingShingle |
Ecology Allochthonous material Arthropods Assembly rules Biomass Colonisation Community assembly Ingimarsdottir, Maria Ripa, Jörgen Magnusdottir, Olof Birna Hedlund, Katarina Food web assembly in isolated habitats: A study from recently emerged nunataks, Iceland |
topic_facet |
Ecology Allochthonous material Arthropods Assembly rules Biomass Colonisation Community assembly |
description |
Allochthonous arthropods can sustain a local food web on seemingly barren land, but are nevertheless often neglected in studies of community assembly. In the present study, we investigated primary food web assembly on nunataks (ice-free areas) in a retreating glacier in Iceland. Nunataks enable studies that take into account both the temporal factor of the assembly and the influx of allochthonous organisms. Arthropods were collected on sites of different age on five nunataks younger than 70 years, as well as the youngest parts of one old nunatak. The youngest sites had no vegetation and were dominated by detritivores and predators along with allochthonous arthropods. The arthropod biomass, that was considered established, increased with vegetation cover and site age but also differed among nunataks. To investigate whether or not the assembly of arthropods was consistent with the predictions of assembly rules, we tested whether, (1) the proportion of each trophic level changed non-randomly, (2) predator-prey ratio remained constant, and (3) larger species replaced smaller ones. We could only verify that proportions of trophic levels changed non-randomly. As assembly rules only apply for established organisms, it is possible that difficulties in determining whether e. g. generalist predators were established or not may affect the outcome of analyses of assembly rules. It is thus important to be aware that unintentional inclusion of allochthonous arthropods in models of community assembly may affect whether or not the community can be explained and predicted by assembly rules. |
format |
Article in Journal/Newspaper |
author |
Ingimarsdottir, Maria Ripa, Jörgen Magnusdottir, Olof Birna Hedlund, Katarina |
author_facet |
Ingimarsdottir, Maria Ripa, Jörgen Magnusdottir, Olof Birna Hedlund, Katarina |
author_sort |
Ingimarsdottir, Maria |
title |
Food web assembly in isolated habitats: A study from recently emerged nunataks, Iceland |
title_short |
Food web assembly in isolated habitats: A study from recently emerged nunataks, Iceland |
title_full |
Food web assembly in isolated habitats: A study from recently emerged nunataks, Iceland |
title_fullStr |
Food web assembly in isolated habitats: A study from recently emerged nunataks, Iceland |
title_full_unstemmed |
Food web assembly in isolated habitats: A study from recently emerged nunataks, Iceland |
title_sort |
food web assembly in isolated habitats: a study from recently emerged nunataks, iceland |
publisher |
Elsevier |
publishDate |
2013 |
url |
https://lup.lub.lu.se/record/3854862 https://doi.org/10.1016/j.baae.2012.12.002 |
genre |
glacier Iceland |
genre_facet |
glacier Iceland |
op_source |
Basic and Applied Ecology; 14(2), pp 174-183 (2013) ISSN: 1618-0089 |
op_relation |
https://lup.lub.lu.se/record/3854862 http://dx.doi.org/10.1016/j.baae.2012.12.002 wos:000317352100009 scopus:84875400712 |
op_doi |
https://doi.org/10.1016/j.baae.2012.12.002 |
container_title |
Basic and Applied Ecology |
container_volume |
14 |
container_issue |
2 |
container_start_page |
174 |
op_container_end_page |
183 |
_version_ |
1782334370207498240 |