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Shell morphology and color of the subtidal whelk Buccinum undatum exhibit fine-scaled spatial patterns

Shell morphology and color of the subtidal whelk Buccinum undatum exhibit fine-scaled spatial patterns


Titill: Shell morphology and color of the subtidal whelk Buccinum undatum exhibit fine-scaled spatial patterns
Höfundur: Magnúsdóttir, Hildur   orcid.org/0000-0002-3750-4937
Palsson, Snaebjorn   orcid.org/0000-0002-4297-3500
Westfall, Kristen M.
Jónsson, Zophonías Oddur   orcid.org/0000-0001-5798-9647
Örnólfsdóttir, Erla Björk
Útgáfa: 2018-04-10
Tungumál: Enska
Umfang: 4552-4563
Háskóli/Stofnun: Háskóli Íslands
University of Iceland
Háskólinn á Hólum
Hólar University College
Svið: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
Deild: Líf- og umhverfisvísindadeild (HÍ)
Faculty of Life and Environmental Sciences (UI)
Fiskeldis- og fiskalíffræðideild (HH)
Department of Aquaculture and Fish Biology (HUC)
Birtist í: Ecology and Evolution;8(9)
ISSN: 2045-7758
DOI: 10.1002/ece3.4015
Efnisorð: Buccinum undatum; Shell morphology; Shell color; Spatial patterns; Subtidal gastropods; Beitukóngur; Skeldýr; Sjávarlíffræði
URI: https://hdl.handle.net/20.500.11815/935

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Tilvitnun:

Magnúsdóttir, H., Pálsson, S., Westfall, K. M., Jónsson, Z. O., & Örnólfsdóttir, E. B. (2018). Shell morphology and color of the subtidal whelk Buccinum undatum exhibit fine-scaled spatial patterns. Ecology and Evolution, 8(9), 4552-4563. doi:doi:10.1002/ece3.4015

Útdráttur:

Geographical patterns in morphology can be the result of divergence among populations due to neutral or selective changes and/or phenotypic plasticity in response to different environments. Marine gastropods are ideal subjects on which to explore these patterns, by virtue of the remarkable intraspecific variation in life‐history traits and morphology often observed across relatively small spatial scales. The ubiquitous N‐Atlantic common whelk (Buccinum undatum) is well known for spatial variation in life‐history traits and morphology. Previous studies on genetic population structure have revealed that it exhibits significant differentiation across geographic distances. Within Breiðafjörður Bay, a large and shallow bay in W‐Iceland, genetic differentiation was demonstrated between whelks from sites separated by just 20 km. Here, we extended our previous studies on the common whelk in Breiðafjörður Bay by quantifying phenotypic variation in shell morphology and color throughout the Bay. We sought to test whether trait differentiation is dependent on geographic distance and/or environmental variability. Whelk in Breiðafjörður Bay displayed fine‐scale patterns of spatial variation in shape, thickness, and color diversity. Differentiation increased with increasing distance between populations, indicating that population connectivity is limited. Both shape and color varied along a gradient from the inner part of the bay in the east to the outer part in the west. Whelk shells in the innermost part of Breiðafjörður Bay were thick with an elongate shell, round aperture, and low color diversity, whereas in the outer part of the bay the shells were thinner, rounder, with a more elongate aperture and richer color diversity. Significant site‐specific difference in shell traits of the common whelk in correlation with environmental variables indicates the presence of local ecotypes and limited demographic connectivity.

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This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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