Tracing early stages of species differentiation: ecological, morphological and genetic divergence of Galápagos sea lion populations

Wolf JBW, Harrod C, Brunner S, Salazar S, Trillmich F, Tautz D (2008)
BMC Evolutionary Biology 8(1): 150.

Download
OA
Zeitschriftenaufsatz | Veröffentlicht | Englisch
Volltext vorhanden für diesen Nachweis
Autor
; ; ; ; ;
Abstract / Bemerkung
Background: Oceans are high gene flow environments that are traditionally believed to hamper the build-up of genetic divergence. Despite this, divergence appears to occur occasionally at surprisingly small scales. The Galápagos archipelago provides an ideal opportunity to examine the evolutionary processes of local divergence in an isolated marine environment. Galápagos sea lions (Zalophus wollebaeki) are top predators in this unique setting and have an essentially unlimited dispersal capacity across the entire species range. In theory, this should oppose any genetic differentiation. Results: We find significant ecological, morphological and genetic divergence between the western colonies and colonies from the central region of the archipelago that are exposed to different ecological conditions. Stable isotope analyses indicate that western animals use different food sources than those from the central area. This is likely due to niche partitioning with the second Galápagos eared seal species, the Galápagos fur seal (Arctocephalus galapagoensis) that exclusively dwells in the west. Stable isotope patterns correlate with significant differences in foraging-related skull morphology. Analyses of mitochondrial sequences as well as microsatellites reveal signs of initial genetic differentiation. Conclusion: Our results suggest a key role of intra- as well as inter-specific niche segregation in the evolution of genetic structure among populations of a highly mobile species under conditions of free movement. Given the monophyletic arrival of the sea lions on the archipelago, our study challenges the view that geographical barriers are strictly needed for the build-up of genetic divergence. The study further raises the interesting prospect that in social, colonially breeding mammals additional forces, such as social structure or feeding traditions, might bear on the genetic partitioning of populations.
Erscheinungsjahr
Zeitschriftentitel
BMC Evolutionary Biology
Band
8
Zeitschriftennummer
1
Artikelnummer
150
ISSN
PUB-ID

Zitieren

Wolf JBW, Harrod C, Brunner S, Salazar S, Trillmich F, Tautz D. Tracing early stages of species differentiation: ecological, morphological and genetic divergence of Galápagos sea lion populations. BMC Evolutionary Biology. 2008;8(1): 150.
Wolf, J. B. W., Harrod, C., Brunner, S., Salazar, S., Trillmich, F., & Tautz, D. (2008). Tracing early stages of species differentiation: ecological, morphological and genetic divergence of Galápagos sea lion populations. BMC Evolutionary Biology, 8(1), 150. doi:10.1186/1471-2148-8-150
Wolf, J. B. W., Harrod, C., Brunner, S., Salazar, S., Trillmich, F., and Tautz, D. (2008). Tracing early stages of species differentiation: ecological, morphological and genetic divergence of Galápagos sea lion populations. BMC Evolutionary Biology 8:150.
Wolf, J.B.W., et al., 2008. Tracing early stages of species differentiation: ecological, morphological and genetic divergence of Galápagos sea lion populations. BMC Evolutionary Biology, 8(1): 150.
J.B.W. Wolf, et al., “Tracing early stages of species differentiation: ecological, morphological and genetic divergence of Galápagos sea lion populations”, BMC Evolutionary Biology, vol. 8, 2008, : 150.
Wolf, J.B.W., Harrod, C., Brunner, S., Salazar, S., Trillmich, F., Tautz, D.: Tracing early stages of species differentiation: ecological, morphological and genetic divergence of Galápagos sea lion populations. BMC Evolutionary Biology. 8, : 150 (2008).
Wolf, Jochen B. W., Harrod, Chris, Brunner, Sylvia, Salazar, Sandie, Trillmich, Fritz, and Tautz, Diethard. “Tracing early stages of species differentiation: ecological, morphological and genetic divergence of Galápagos sea lion populations”. BMC Evolutionary Biology 8.1 (2008): 150.
Alle Dateien verfügbar unter der/den folgenden Lizenz(en):
Copyright Statement:
This Item is protected by copyright and/or related rights. [...]
Volltext(e)
Access Level
OA Open Access
Zuletzt Hochgeladen
2016-02-16T14:08:30Z

18 Zitationen in Europe PMC

Daten bereitgestellt von Europe PubMed Central.

Ancient female philopatry, asymmetric male gene flow, and synchronous population expansion support the influence of climatic oscillations on the evolution of South American sea lion (Otaria flavescens).
Oliveira LR, Gehara MCM, Fraga LD, Lopes F, Túnez JI, Cassini MH, Majluf P, Cárdenas-Alayza S, Pavés HJ, Crespo EA, García N, Loizaga de Castro R, Hoelzel AR, Sepúlveda M, Olavarría C, Valiati VH, Quiñones R, Pérez-Alvarez MJ, Ott PH, Bonatto SL., PLoS One 12(6), 2017
PMID: 28654647
Habitat use, but not gene flow, is influenced by human activities in two ecotypes of Egyptian fruit bat (Rousettus aegyptiacus).
Centeno-Cuadros A, Hulva P, Romportl D, Santoro S, Stříbná T, Shohami D, Evin A, Tsoar A, Benda P, Horáček I, Nathan R., Mol Ecol 26(22), 2017
PMID: 28950408
Population structure and historical demography of South American sea lions provide insights into the catastrophic decline of a marine mammal population.
Hoffman JI, Kowalski GJ, Klimova A, Eberhart-Phillips LJ, Staniland IJ, Baylis AM., R Soc Open Sci 3(7), 2016
PMID: 27493782
Hybridization masks speciation in the evolutionary history of the Galápagos marine iguana.
MacLeod A, Rodríguez A, Vences M, Orozco-terWengel P, García C, Trillmich F, Gentile G, Caccone A, Quezada G, Steinfartz S., Proc Biol Sci 282(1809), 2015
PMID: 26041359
Differences in foraging ecology align with genetically divergent ecotypes of a highly mobile marine top predator.
Jeglinski JW, Wolf JB, Werner C, Costa DP, Trillmich F., Oecologia 179(4), 2015
PMID: 26307593
Context-dependent associations between heterozygosity and immune variation in a wild carnivore.
Brock PM, Goodman SJ, Hall AJ, Cruz M, Acevedo-Whitehouse K., BMC Evol Biol 15(), 2015
PMID: 26537228
Ecological opportunities and specializations shaped genetic divergence in a highly mobile marine top predator.
Louis M, Fontaine MC, Spitz J, Schlund E, Dabin W, Deaville R, Caurant F, Cherel Y, Guinet C, Simon-Bouhet B., Proc Biol Sci 281(1795), 2014
PMID: 25297864
Same size--same niche? Foraging niche separation between sympatric juvenile Galapagos sea lions and adult Galapagos fur seals.
Jeglinski JW, Goetz KT, Werner C, Costa DP, Trillmich F., J Anim Ecol 82(3), 2013
PMID: 23351022
Phenotype-environment correlations in a putative whitefish adaptive radiation.
Harrod C, Mallela J, Kahilainen KK., J Anim Ecol 79(5), 2010
PMID: 20487087
Speciation genetics: current status and evolving approaches.
Wolf JB, Lindell J, Backström N., Philos Trans R Soc Lond B Biol Sci 365(1547), 2010
PMID: 20439277
Ecological, morphological and genetic divergence of sympatric North Atlantic killer whale populations.
Foote AD, Newton J, Piertney SB, Willerslev E, Gilbert MT., Mol Ecol 18(24), 2009
PMID: 20050301
Progressive colonization and restricted gene flow shape island-dependent population structure in Galápagos marine iguanas (Amblyrhynchus cristatus).
Steinfartz S, Glaberman S, Lanterbecq D, Russello MA, Rosa S, Hanley TC, Marquez C, Snell HL, Snell HM, Gentile G, Dell'Olmo G, Powell AM, Caccone A., BMC Evol Biol 9(), 2009
PMID: 20028547
Kin in space: social viscosity in a spatially and genetically substructured network.
Wolf JB, Trillmich F., Proc Biol Sci 275(1647), 2008
PMID: 18522913

78 References

Daten bereitgestellt von Europe PubMed Central.

PHYLIP (Phylogeny Inference Package) version 3.6
AUTHOR UNKNOWN, 2004
Genetic differentiation between individuals
AUTHOR UNKNOWN, 2000
R: a language for data analysis and graphics
AUTHOR UNKNOWN, 1996

Export

Markieren/ Markierung löschen
Markierte Publikationen

Open Data PUB

Web of Science

Dieser Datensatz im Web of Science®

Quellen

PMID: 18485220
PubMed | Europe PMC

Suchen in

Google Scholar