An interspecific test of Bergmann's rule reveals inconsistent body size patterns across several lineages of water beetles (Coleoptera: Dytiscidae)
1. Bergmann's rule sensu lato, the ecogeographic pattern relating animals' body size with environmental temperature (or latitude), has been shown to be inconsistent among insect taxa. Body size clines remain largely unexplored in aquatic insects, which may show contrasting patterns to those found in terrestrial groups because of the physiological or mechanical constraints of the aquatic environment. 2. Bergmann's rule was tested using data on body size, phylogeny and distribution for 93 species belonging to four lineages of dytiscid water beetles. The relationship between size and latitude was explored at two taxonomic resolutions – within each independent lineage, and for the whole dataset – employing phylogenetic generalised least-squares to control for phylogenetic inertia. The potential influence of habitat preference (lotic versus lentic) on body size clines was also considered. 3. Within-lineage analyses showed negative relationships (i.e. converse Bergmann's rule), but only in two lineages (specifically in those that included both lotic and lentic species). By contrast, no relationship was found between body size and latitude for the whole dataset. 4. These results suggest that there may be no universal interspecific trends in latitudinal variation of body size in aquatic insects, even among closely related groups, and show the need to account for phylogenetic inertia. Furthermore, habitat preferences should be considered when exploring latitudinal clines in body size in aquatic taxa at the interspecific level.
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John Wiley & Sons
2019-04
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Subjects: | Aquatic insects, Biogeography, Habitat, inland waters, Latitude, Lentic, lotic, Phylogeny, |
Online Access: | http://hdl.handle.net/10261/206231 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100007480 http://dx.doi.org/10.13039/100009042 |
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dig-ibe-es-10261-2062312020-12-13T00:11:14Z An interspecific test of Bergmann's rule reveals inconsistent body size patterns across several lineages of water beetles (Coleoptera: Dytiscidae) Pallarés, Susana Lai, Michele Abellán, Pedro Ribera, Ignacio Sánchez-Fernández, David European Commission Universidad de Castilla La Mancha Universidad de Sevilla Aquatic insects Biogeography Habitat inland waters Latitude Lentic lotic Phylogeny 1. Bergmann's rule sensu lato, the ecogeographic pattern relating animals' body size with environmental temperature (or latitude), has been shown to be inconsistent among insect taxa. Body size clines remain largely unexplored in aquatic insects, which may show contrasting patterns to those found in terrestrial groups because of the physiological or mechanical constraints of the aquatic environment. 2. Bergmann's rule was tested using data on body size, phylogeny and distribution for 93 species belonging to four lineages of dytiscid water beetles. The relationship between size and latitude was explored at two taxonomic resolutions – within each independent lineage, and for the whole dataset – employing phylogenetic generalised least-squares to control for phylogenetic inertia. The potential influence of habitat preference (lotic versus lentic) on body size clines was also considered. 3. Within-lineage analyses showed negative relationships (i.e. converse Bergmann's rule), but only in two lineages (specifically in those that included both lotic and lentic species). By contrast, no relationship was found between body size and latitude for the whole dataset. 4. These results suggest that there may be no universal interspecific trends in latitudinal variation of body size in aquatic insects, even among closely related groups, and show the need to account for phylogenetic inertia. Furthermore, habitat preferences should be considered when exploring latitudinal clines in body size in aquatic taxa at the interspecific level. We thank two anonymous referees for valuable comments on the manuscript. DS‐F was supported by a postdoctoral contract funded by the Universidad de Castilla‐La Mancha and the European Social Fund (ESF), and PA is funded by ‘V Plan Propio de Investigación’ of the Universidad de Sevilla (Spain). 2020-04-02T08:45:57Z 2020-04-02T08:45:57Z 2019-04 2020-04-02T08:45:57Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1111/een.12701 e-issn: 1365-2311 issn: 1366-9516 Ecological Entomology 44(2): 249-254 (2019) http://hdl.handle.net/10261/206231 10.1111/een.12701 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100007480 http://dx.doi.org/10.13039/100009042 http://doi.org/10.1111/een.12701 Sí none John Wiley & Sons |
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Aquatic insects Biogeography Habitat inland waters Latitude Lentic lotic Phylogeny Aquatic insects Biogeography Habitat inland waters Latitude Lentic lotic Phylogeny |
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Aquatic insects Biogeography Habitat inland waters Latitude Lentic lotic Phylogeny Aquatic insects Biogeography Habitat inland waters Latitude Lentic lotic Phylogeny Pallarés, Susana Lai, Michele Abellán, Pedro Ribera, Ignacio Sánchez-Fernández, David An interspecific test of Bergmann's rule reveals inconsistent body size patterns across several lineages of water beetles (Coleoptera: Dytiscidae) |
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1. Bergmann's rule sensu lato, the ecogeographic pattern relating animals' body size with environmental temperature (or latitude), has been shown to be inconsistent among insect taxa. Body size clines remain largely unexplored in aquatic insects, which may show contrasting patterns to those found in terrestrial groups because of the physiological or mechanical constraints of the aquatic environment. 2. Bergmann's rule was tested using data on body size, phylogeny and distribution for 93 species belonging to four lineages of dytiscid water beetles. The relationship between size and latitude was explored at two taxonomic resolutions – within each independent lineage, and for the whole dataset – employing phylogenetic generalised least-squares to control for phylogenetic inertia. The potential influence of habitat preference (lotic versus lentic) on body size clines was also considered. 3. Within-lineage analyses showed negative relationships (i.e. converse Bergmann's rule), but only in two lineages (specifically in those that included both lotic and lentic species). By contrast, no relationship was found between body size and latitude for the whole dataset. 4. These results suggest that there may be no universal interspecific trends in latitudinal variation of body size in aquatic insects, even among closely related groups, and show the need to account for phylogenetic inertia. Furthermore, habitat preferences should be considered when exploring latitudinal clines in body size in aquatic taxa at the interspecific level. |
author2 |
European Commission |
author_facet |
European Commission Pallarés, Susana Lai, Michele Abellán, Pedro Ribera, Ignacio Sánchez-Fernández, David |
format |
artículo |
topic_facet |
Aquatic insects Biogeography Habitat inland waters Latitude Lentic lotic Phylogeny |
author |
Pallarés, Susana Lai, Michele Abellán, Pedro Ribera, Ignacio Sánchez-Fernández, David |
author_sort |
Pallarés, Susana |
title |
An interspecific test of Bergmann's rule reveals inconsistent body size patterns across several lineages of water beetles (Coleoptera: Dytiscidae) |
title_short |
An interspecific test of Bergmann's rule reveals inconsistent body size patterns across several lineages of water beetles (Coleoptera: Dytiscidae) |
title_full |
An interspecific test of Bergmann's rule reveals inconsistent body size patterns across several lineages of water beetles (Coleoptera: Dytiscidae) |
title_fullStr |
An interspecific test of Bergmann's rule reveals inconsistent body size patterns across several lineages of water beetles (Coleoptera: Dytiscidae) |
title_full_unstemmed |
An interspecific test of Bergmann's rule reveals inconsistent body size patterns across several lineages of water beetles (Coleoptera: Dytiscidae) |
title_sort |
interspecific test of bergmann's rule reveals inconsistent body size patterns across several lineages of water beetles (coleoptera: dytiscidae) |
publisher |
John Wiley & Sons |
publishDate |
2019-04 |
url |
http://hdl.handle.net/10261/206231 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100007480 http://dx.doi.org/10.13039/100009042 |
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