Strugnell, JM, Allcock, AL, Watts, PC. Closely related octopus species show different spatial genetic structures in response to the Antarctic seascape. Ecol Evol. 2017; 7: 8087– 8099. https://doi.org/10.1002/ece3.3327
Closely related octopus species show different spatial genetic structures in response to the Antarctic seascape
|Author:||Strugnell, Jan M.1,2; Allcock, A. Louise3; Watts, Phillip C.4|
1Centre for Sustainable Tropical Fisheries and Aquaculture, Marine Biology and Aquaculture James Cook University, Townsville, Qld, Australia
2Department of Ecology, Environment and Evolution, School of Life Sciences, La Trobe University, Melbourne, Vic., Australia
3Ryan Institute and School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
4Department of Ecology and Genetics, University of Oulu, Oulu, Finland
|Online Access:||PDF Full Text (PDF, 0.8 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe202103016254
John Wiley & Sons,
|Publish Date:|| 2021-03-01
Determining whether comparable processes drive genetic divergence among marine species is relevant to molecular ecologists and managers alike. Sympatric species with similar life histories might be expected to show comparable patterns of genetic differentiation and a consistent influence of environmental factors in shaping divergence. We used microsatellite loci to quantify genetic differentiation across the Scotia Arc in three species of closely related benthic octopods, Pareledone turqueti, P. charcoti, and Adelieledone polymorpha. The relative importance of environmental factors (latitude, longitude, depth, and temperature) in shaping genetic structure was investigated when significant spatial genetic structure was uncovered. Isolated populations of P. turqueti and A. polymorpha at these species’ range margins were genetically different to samples close to mainland Antarctica; however, these species showed different genetic structures at a regional scale. Samples of P. turqueti from the Antarctic Peninsula, Elephant Island, and Signy Island were genetically different, and this divergence was associated primarily with sample collection depth. By contrast, weak or nonsignificant spatial genetic structure was evident across the Antarctic Peninsula, Elephant Island, and Signy Island region for A. polymorpha, and slight associations between population divergence and temperature or depth (and/or longitude) were detected. Pareledone charcoti has a limited geographic range, but exhibited no genetic differentiation between samples from a small region of the Scotia Arc (Elephant Island and the Antarctic Peninsula). Thus, closely related species with similar life history strategies can display contrasting patterns of genetic differentiation depending on spatial scale; moreover, depth may drive genetic divergence in Southern Ocean benthos.
Ecology and evolution
|Pages:||8087 - 8099|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
1172 Environmental sciences
1184 Genetics, developmental biology, physiology
JMS was supported by NERC AFI NE⁄C506321⁄1 awarded to ALA and a Lloyd's Tercentenary Fellowship for part of this work. This work was also funded by a CoSyst grant awarded to JMS and PCW and an Antarctic Science Bursary, a Systematics Association grant, the Edith Mary Pratt Musgrave Fund, an Australia and Pacific Science Foundation grant and a Thomas Davies Research Fund awarded to JMS, and by the Finnish Academy (grant 305532 to PCW). This manuscript is a contribution to the Scientific Committee on Antarctic Research (SCAR program); State of the Antarctic Ecosystem (AntEco).
|Academy of Finland Grant Number:||
305532 (Academy of Finland Funding decision)
© 2017 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. 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.