Data from: Inferring the effects of potential dispersal routes on the metacommunity structure of stream insects: as the crow flies, as the fish swims or as the fox runs?
1. Metacommunity research relies largely on proxies for inferring the effect of dispersal on local community structure. Overland and watercourse distances have been typically used as such proxies. A good proxy for dispersal should, however, take into account more complex landscape features that can...
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Online Access: | http://hdl.handle.net/10255/dryad.87410 https://doi.org/10.5061/dryad.9rt57 |
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ftdryad:oai:v1.datadryad.org:10255/dryad.87410 2023-05-15T18:28:40+02:00 Data from: Inferring the effects of potential dispersal routes on the metacommunity structure of stream insects: as the crow flies, as the fish swims or as the fox runs? Kärnä, Olli-Matti Grönroos, Mira Antikainen, Harri Hjort, Jan Ilmonen, Jari Paasivirta, Lauri Heino, Jani River Tenojoki Basin Finland 2015-05-18T16:52:00Z http://hdl.handle.net/10255/dryad.87410 https://doi.org/10.5061/dryad.9rt57 unknown doi:10.5061/dryad.9rt57/1 doi:10.5061/dryad.9rt57/2 doi:10.1111/1365-2656.12397 PMID:25981411 doi:10.5061/dryad.9rt57 Kärnä O, Grönroos M, Antikainen H, Hjort J, Ilmonen J, Paasivirta L, Heino J (2015) Inferring the effects of potential dispersal routes on the metacommunity structure of stream insects: as the crow flies, as the fish swims or as the fox runs? Journal of Animal Ecology 84(5): 1342–1353. http://hdl.handle.net/10255/dryad.87410 body size cost distance dispersal insects landscape resistance overland distance watercourse distance Article 2015 ftdryad https://doi.org/10.5061/dryad.9rt57 https://doi.org/10.5061/dryad.9rt57/1 https://doi.org/10.5061/dryad.9rt57/2 https://doi.org/10.1111/1365-2656.12397 2020-01-01T15:19:54Z 1. Metacommunity research relies largely on proxies for inferring the effect of dispersal on local community structure. Overland and watercourse distances have been typically used as such proxies. A good proxy for dispersal should, however, take into account more complex landscape features that can affect an organism's movement and dispersal. The cost distance approach does just that, allowing determining the path of least resistance across a landscape. 2. Here, we examined the distance decay of assemblage similarity within a subarctic stream insect metacommunity. We tested whether overland, watercourse and cumulative cost distances performed differently as correlates of dissimilarity in assemblage composition between sites. We also investigated the effect of body size and dispersal mode on metacommunity organization. 3. We found that dissimilarities in assemblage composition correlated more strongly with environmental than physical distances between sites. Overland and watercourse distances showed similar correlations to assemblage dissimilarity between sites, being sometimes significantly correlated with biological variation of entire insect communities. In metacommunities deconstructed by body size or dispersal mode, contrary to our expectation, passive dispersers showed a slightly stronger correlation than active dispersers to environmental differences between sites, although passive dispersers also showed a stronger correlation than active dispersers to physical distances between sites. The strength of correlation between environmental distance and biological dissimilarity also varied slightly among the body size classes. 4. After controlling for environmental differences between sites, cumulative cost distances were slightly better correlates of biological dissimilarities than overland or watercourse distances between sites. However, quantitative differences in correlation coefficients were small between different physical distances. 5. Although environmental differences typically override physical distances as determinants of the composition of stream insect assemblages, correlations between environmental distances and biological dissimilarities are typically rather weak. This undetermined variation may be attributable to dispersal processes, which may be captured using better proxies for the process. We suggest that further modifying the measurement of cost distances may be a fruitful avenue, especially if complemented by more direct natural history information on insect dispersal behaviour and distances travelled by them. Article in Journal/Newspaper Subarctic Dryad Digital Repository (Duke University) |
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Open Polar |
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Dryad Digital Repository (Duke University) |
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ftdryad |
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unknown |
topic |
body size cost distance dispersal insects landscape resistance overland distance watercourse distance |
spellingShingle |
body size cost distance dispersal insects landscape resistance overland distance watercourse distance Kärnä, Olli-Matti Grönroos, Mira Antikainen, Harri Hjort, Jan Ilmonen, Jari Paasivirta, Lauri Heino, Jani Data from: Inferring the effects of potential dispersal routes on the metacommunity structure of stream insects: as the crow flies, as the fish swims or as the fox runs? |
topic_facet |
body size cost distance dispersal insects landscape resistance overland distance watercourse distance |
description |
1. Metacommunity research relies largely on proxies for inferring the effect of dispersal on local community structure. Overland and watercourse distances have been typically used as such proxies. A good proxy for dispersal should, however, take into account more complex landscape features that can affect an organism's movement and dispersal. The cost distance approach does just that, allowing determining the path of least resistance across a landscape. 2. Here, we examined the distance decay of assemblage similarity within a subarctic stream insect metacommunity. We tested whether overland, watercourse and cumulative cost distances performed differently as correlates of dissimilarity in assemblage composition between sites. We also investigated the effect of body size and dispersal mode on metacommunity organization. 3. We found that dissimilarities in assemblage composition correlated more strongly with environmental than physical distances between sites. Overland and watercourse distances showed similar correlations to assemblage dissimilarity between sites, being sometimes significantly correlated with biological variation of entire insect communities. In metacommunities deconstructed by body size or dispersal mode, contrary to our expectation, passive dispersers showed a slightly stronger correlation than active dispersers to environmental differences between sites, although passive dispersers also showed a stronger correlation than active dispersers to physical distances between sites. The strength of correlation between environmental distance and biological dissimilarity also varied slightly among the body size classes. 4. After controlling for environmental differences between sites, cumulative cost distances were slightly better correlates of biological dissimilarities than overland or watercourse distances between sites. However, quantitative differences in correlation coefficients were small between different physical distances. 5. Although environmental differences typically override physical distances as determinants of the composition of stream insect assemblages, correlations between environmental distances and biological dissimilarities are typically rather weak. This undetermined variation may be attributable to dispersal processes, which may be captured using better proxies for the process. We suggest that further modifying the measurement of cost distances may be a fruitful avenue, especially if complemented by more direct natural history information on insect dispersal behaviour and distances travelled by them. |
format |
Article in Journal/Newspaper |
author |
Kärnä, Olli-Matti Grönroos, Mira Antikainen, Harri Hjort, Jan Ilmonen, Jari Paasivirta, Lauri Heino, Jani |
author_facet |
Kärnä, Olli-Matti Grönroos, Mira Antikainen, Harri Hjort, Jan Ilmonen, Jari Paasivirta, Lauri Heino, Jani |
author_sort |
Kärnä, Olli-Matti |
title |
Data from: Inferring the effects of potential dispersal routes on the metacommunity structure of stream insects: as the crow flies, as the fish swims or as the fox runs? |
title_short |
Data from: Inferring the effects of potential dispersal routes on the metacommunity structure of stream insects: as the crow flies, as the fish swims or as the fox runs? |
title_full |
Data from: Inferring the effects of potential dispersal routes on the metacommunity structure of stream insects: as the crow flies, as the fish swims or as the fox runs? |
title_fullStr |
Data from: Inferring the effects of potential dispersal routes on the metacommunity structure of stream insects: as the crow flies, as the fish swims or as the fox runs? |
title_full_unstemmed |
Data from: Inferring the effects of potential dispersal routes on the metacommunity structure of stream insects: as the crow flies, as the fish swims or as the fox runs? |
title_sort |
data from: inferring the effects of potential dispersal routes on the metacommunity structure of stream insects: as the crow flies, as the fish swims or as the fox runs? |
publishDate |
2015 |
url |
http://hdl.handle.net/10255/dryad.87410 https://doi.org/10.5061/dryad.9rt57 |
op_coverage |
River Tenojoki Basin Finland |
genre |
Subarctic |
genre_facet |
Subarctic |
op_relation |
doi:10.5061/dryad.9rt57/1 doi:10.5061/dryad.9rt57/2 doi:10.1111/1365-2656.12397 PMID:25981411 doi:10.5061/dryad.9rt57 Kärnä O, Grönroos M, Antikainen H, Hjort J, Ilmonen J, Paasivirta L, Heino J (2015) Inferring the effects of potential dispersal routes on the metacommunity structure of stream insects: as the crow flies, as the fish swims or as the fox runs? Journal of Animal Ecology 84(5): 1342–1353. http://hdl.handle.net/10255/dryad.87410 |
op_doi |
https://doi.org/10.5061/dryad.9rt57 https://doi.org/10.5061/dryad.9rt57/1 https://doi.org/10.5061/dryad.9rt57/2 https://doi.org/10.1111/1365-2656.12397 |
_version_ |
1766211232335921152 |