"Nested" cryptic diversity in a widespread marine ecosystem engineer: a challenge for detecting biological invasions

 

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dc.contributor.author Teske, Peter en_ZA
dc.contributor.author Rius, Marc en_ZA
dc.contributor.author McQuaid, Christopher en_ZA
dc.contributor.author Styan, Craig en_ZA
dc.contributor.author Piggott, Maxine en_ZA
dc.contributor.author Benhissoune, Said en_ZA
dc.contributor.author Fuentes-Grunewald, Claudio en_ZA
dc.contributor.author Walls, Kathy en_ZA
dc.contributor.author Page, Mike en_ZA
dc.contributor.author Attard, Catherine en_ZA
dc.contributor.author Cooke, Georgina en_ZA
dc.contributor.author McClusky, Claire en_ZA
dc.contributor.author Banks, Sam en_ZA
dc.contributor.author Barker, Nigel en_ZA
dc.contributor.author Beheregaray, Luci en_ZA
dc.date.accessioned 2015-11-18T04:04:10Z
dc.date.available 2015-11-18T04:04:10Z
dc.date.issued 2011 en_ZA
dc.identifier.citation Teske, P. R., Rius, M., McQuaid, C. D., Styan, C. A., Piggott, M. P., Benhissoune, S., ... & Beheregaray, L. B. (2011). Nested” cryptic diversity in a widespread marine ecosystem engineer: a challenge for detecting biological invasions. BMC evolutionary biology, 11(1), 176. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/15109
dc.identifier.uri http://dx.doi.org/10.1186/1471-2148-11-176
dc.description.abstract BACKGROUND: Ecosystem engineers facilitate habitat formation and enhance biodiversity, but when they become invasive, they present a critical threat to native communities because they can drastically alter the receiving habitat. Management of such species thus needs to be a priority, but the poorly resolved taxonomy of many ecosystem engineers represents a major obstacle to correctly identifying them as being either native or introduced. We address this dilemma by studying the sea squirt Pyura stolonifera, an important ecosystem engineer that dominates coastal communities particularly in the southern hemisphere. Using DNA sequence data from four independently evolving loci, we aimed to determine levels of cryptic diversity, the invasive or native status of each regional population, and the most appropriate sampling design for identifying the geographic ranges of each evolutionary unit. RESULTS: Extensive sampling in Africa, Australasia and South America revealed the existence of "nested" levels of cryptic diversity, in which at least five distinct species can be further subdivided into smaller-scale genetic lineages. The ranges of several evolutionary units are limited by well-documented biogeographic disjunctions. Evidence for both cryptic native diversity and the existence of invasive populations allows us to considerably refine our view of the native versus introduced status of the evolutionary units within Pyura stolonifera in the different coastal communities they dominate. CONCLUSIONS: This study illustrates the degree of taxonomic complexity that can exist within widespread species for which there is little taxonomic expertise, and it highlights the challenges involved in distinguishing between indigenous and introduced populations. The fact that multiple genetic lineages can be native to a single geographic region indicates that it is imperative to obtain samples from as many different habitat types and biotic zones as possible when attempting to identify the source region of a putative invader. "Nested" cryptic diversity, and the difficulties in correctly identifying invasive species that arise from it, represent a major challenge for managing biodiversity. en_ZA
dc.language.iso eng en_ZA
dc.publisher BioMed Central Ltd en_ZA
dc.rights This is an Open Access article distributed under the terms of the Creative Commons Attribution License en_ZA
dc.rights.uri http://creativecommons.org/licenses/by/2.0 en_ZA
dc.source BMC Evolutionary Biology en_ZA
dc.source.uri http://www.biomedcentral.com/bmcevolbiol/ en_ZA
dc.subject.other Cryptic diversity en_ZA
dc.subject.other Taxonomic complexity en_ZA
dc.subject.other Taxonomic expertise en_ZA
dc.title "Nested" cryptic diversity in a widespread marine ecosystem engineer: a challenge for detecting biological invasions en_ZA
dc.type Journal Article en_ZA
dc.rights.holder 2011 Teske et al; licensee BioMed Central Ltd. en_ZA
uct.type.publication Research en_ZA
uct.type.resource Article en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Biological Sciences en_ZA
uct.type.filetype Text
uct.type.filetype Image


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This is an Open Access article distributed under the terms of the Creative Commons Attribution License Except where otherwise noted, this item's license is described as This is an Open Access article distributed under the terms of the Creative Commons Attribution License