New parasites and predators follow the introduction of two fish species to a subarctic lake: implications for food-web structure and functioning
Introduced species can alter the topology of food webs. For instance, an introduction can aid the arrival of free-living consumers using the new species as a resource, while new parasites may also arrive with the introduced species. Food-web responses to species additions can thus be far more comple...
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ftpubmed:oai:pubmedcentral.nih.gov:3612402 2023-05-15T14:30:11+02:00 New parasites and predators follow the introduction of two fish species to a subarctic lake: implications for food-web structure and functioning Amundsen, Per-Arne Lafferty, Kevin D. Knudsen, Rune Primicerio, Raul Kristoffersen, Roar Klemetsen, Anders Kuris, Armand M. 2012-09-28 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3612402 http://www.ncbi.nlm.nih.gov/pubmed/23053223 https://doi.org/10.1007/s00442-012-2461-2 en eng Springer-Verlag http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3612402 http://www.ncbi.nlm.nih.gov/pubmed/23053223 http://dx.doi.org/10.1007/s00442-012-2461-2 © The Author(s) 2012 Community ecology - Original research Text 2012 ftpubmed https://doi.org/10.1007/s00442-012-2461-2 2013-09-04T21:49:33Z Introduced species can alter the topology of food webs. For instance, an introduction can aid the arrival of free-living consumers using the new species as a resource, while new parasites may also arrive with the introduced species. Food-web responses to species additions can thus be far more complex than anticipated. In a subarctic pelagic food web with free-living and parasitic species, two fish species (arctic charr Salvelinus alpinus and three-spined stickleback Gasterosteus aculeatus) have known histories as deliberate introductions. The effects of these introductions on the food web were explored by comparing the current pelagic web with a heuristic reconstruction of the pre-introduction web. Extinctions caused by these introductions could not be evaluated by this approach. The introduced fish species have become important hubs in the trophic network, interacting with numerous parasites, predators and prey. In particular, five parasite species and four predatory bird species depend on the two introduced species as obligate trophic resources in the pelagic web and could therefore not have been present in the pre-introduction network. The presence of the two introduced fish species and the arrival of their associated parasites and predators increased biodiversity, mean trophic level, linkage density, and nestedness; altering both the network structure and functioning of the pelagic web. Parasites, in particular trophically transmitted species, had a prominent role in the network alterations that followed the introductions. Text Arctic charr Arctic Salvelinus alpinus Subarctic PubMed Central (PMC) Arctic Oecologia 171 4 993 1002 |
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English |
topic |
Community ecology - Original research |
spellingShingle |
Community ecology - Original research Amundsen, Per-Arne Lafferty, Kevin D. Knudsen, Rune Primicerio, Raul Kristoffersen, Roar Klemetsen, Anders Kuris, Armand M. New parasites and predators follow the introduction of two fish species to a subarctic lake: implications for food-web structure and functioning |
topic_facet |
Community ecology - Original research |
description |
Introduced species can alter the topology of food webs. For instance, an introduction can aid the arrival of free-living consumers using the new species as a resource, while new parasites may also arrive with the introduced species. Food-web responses to species additions can thus be far more complex than anticipated. In a subarctic pelagic food web with free-living and parasitic species, two fish species (arctic charr Salvelinus alpinus and three-spined stickleback Gasterosteus aculeatus) have known histories as deliberate introductions. The effects of these introductions on the food web were explored by comparing the current pelagic web with a heuristic reconstruction of the pre-introduction web. Extinctions caused by these introductions could not be evaluated by this approach. The introduced fish species have become important hubs in the trophic network, interacting with numerous parasites, predators and prey. In particular, five parasite species and four predatory bird species depend on the two introduced species as obligate trophic resources in the pelagic web and could therefore not have been present in the pre-introduction network. The presence of the two introduced fish species and the arrival of their associated parasites and predators increased biodiversity, mean trophic level, linkage density, and nestedness; altering both the network structure and functioning of the pelagic web. Parasites, in particular trophically transmitted species, had a prominent role in the network alterations that followed the introductions. |
format |
Text |
author |
Amundsen, Per-Arne Lafferty, Kevin D. Knudsen, Rune Primicerio, Raul Kristoffersen, Roar Klemetsen, Anders Kuris, Armand M. |
author_facet |
Amundsen, Per-Arne Lafferty, Kevin D. Knudsen, Rune Primicerio, Raul Kristoffersen, Roar Klemetsen, Anders Kuris, Armand M. |
author_sort |
Amundsen, Per-Arne |
title |
New parasites and predators follow the introduction of two fish species to a subarctic lake: implications for food-web structure and functioning |
title_short |
New parasites and predators follow the introduction of two fish species to a subarctic lake: implications for food-web structure and functioning |
title_full |
New parasites and predators follow the introduction of two fish species to a subarctic lake: implications for food-web structure and functioning |
title_fullStr |
New parasites and predators follow the introduction of two fish species to a subarctic lake: implications for food-web structure and functioning |
title_full_unstemmed |
New parasites and predators follow the introduction of two fish species to a subarctic lake: implications for food-web structure and functioning |
title_sort |
new parasites and predators follow the introduction of two fish species to a subarctic lake: implications for food-web structure and functioning |
publisher |
Springer-Verlag |
publishDate |
2012 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3612402 http://www.ncbi.nlm.nih.gov/pubmed/23053223 https://doi.org/10.1007/s00442-012-2461-2 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Salvelinus alpinus Subarctic |
genre_facet |
Arctic charr Arctic Salvelinus alpinus Subarctic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3612402 http://www.ncbi.nlm.nih.gov/pubmed/23053223 http://dx.doi.org/10.1007/s00442-012-2461-2 |
op_rights |
© The Author(s) 2012 |
op_doi |
https://doi.org/10.1007/s00442-012-2461-2 |
container_title |
Oecologia |
container_volume |
171 |
container_issue |
4 |
container_start_page |
993 |
op_container_end_page |
1002 |
_version_ |
1766304079090286592 |