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Publication Type J
Authors Rouger, R; Jump, AS
Author Full Name Rouger, R.; Jump, A. S.
Title Fine-scale spatial genetic structure across a strong environmental gradient in the saltmarsh plant Puccinellia maritima
Source EVOLUTIONARY ECOLOGY
Language English
Document Type Article
Author Keywords Puccinellia maritima; Saltmarsh; Polyploidy; Microsatellite; Genetic structure; sPCA
Keywords Plus NATURAL-SELECTION; POPULATION-STRUCTURE; LOCAL ADAPTATION; FLOW; SALINITY; DIFFERENTIATION; PATTERNS; COMPETITION; DIVERGENCE; SPECIATION
Abstract Saltmarsh forms the transition between maritime and terrestrial environments where biotic and abiotic conditions vary substantially along a gradient in elevation. Theoretical and empirical population genetics studies have focused on the influence of environmental gradients on intra-specific genetic variation. Contrastingly, only a few studies have focused on genetic variation in saltmarsh plants, despite the potentially strong influence of environmental gradients shaping diversity in these species. In the present paper, we assess the genetic structure of the saltmarsh plant Puccinellia maritima collected across an elevation gradient in restored and natural saltmarsh. Both spatial autocorrelograms of genetic variation and spatial analysis of principal components detected genetic structure in the natural saltmarsh organized along the gradient in elevation, yet no such pattern was identified considering distance between individuals without taking elevation into account. In combination with previous phenotypic analyses, our results imply that ecological divergence likely plays a key role in shaping genetic structure within saltmarsh species. Comparison of restored and natural saltmarsh indicated that interspecific competition plays an important role in shaping the genetic structure observed on the natural saltmarsh. The results of this study demonstrate that saltmarshes are valuable models in which to test effects of ecological differentiation and, by extension, provide a better understanding of the functioning of this threatened environment.
Author Address [Rouger, R.; Jump, A. S.] Univ Stirling, Sch Nat Sci, Biol & Environm Sci, Stirling FK9 4LA, Scotland
Reprint Address Jump, AS (reprint author), Univ Stirling, Sch Nat Sci, Biol & Environm Sci, Stirling FK9 4LA, Scotland.
E-mail Address rouger.romuald@gmail.com; a.s.jump@stir.ac.uk
ResearcherID Number Jump, Alistair/B-5746-2012;
ORCID Number Jump, Alistair/0000-0002-2167-6451
Funding Agency and Grant Number Esmee Fairbairn Foundation; University of Stirling; Royal Society for the Protection of Birds, Scotland (RSPB)
Funding Text This work was jointly funded by the Esmee Fairbairn Foundation, the University of Stirling and the Royal Society for the Protection of Birds, Scotland (RSPB). We thank RSPB Scotland for enabling access to the field sites and providing logistical support during site surveys.
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Cited Reference Count 57
Publisher SPRINGER
Publisher City DORDRECHT
Publisher Address VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
ISSN 0269-7653
29-Character Source Abbreviation EVOL ECOL
ISO Source Abbreviation Evol. Ecol.
Publication Date JUL
Year Published 2015
Volume 29
Issue 4
Beginning Page 609
Ending Page 623
Digital Object Identifier (DOI) 10.1007/s10682-015-9767-6
Page Count 15
Web of Science Category Ecology; Evolutionary Biology; Genetics & Heredity
Subject Category Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity
Document Delivery Number CK1CM
Unique Article Identifier WOS:000355943000011
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