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Detecting local adaptation in widespread grassland species - the importance of scale and local plant community

Bischoff, A., Cremieux, L., Smilauerova, M., Lawson, C. S., Mortimer, S. R., Dolezal, J., Lanta, V., Edwards, A. R., Brook, A. J., Macel, M., Leps, J., Steinger, T. and Muller-Scharer, H. (2006) Detecting local adaptation in widespread grassland species - the importance of scale and local plant community. Journal of Ecology, 94 (6). pp. 1130-1142. ISSN 0022-0477

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To link to this item DOI: 10.1111/j.1365-2745.2006.01174.x


1 Adaptation of plant populations to local environments has been shown in many species but local adaptation is not always apparent and spatial scales of differentiation are not well known. In a reciprocal transplant experiment we tested whether: (i) three widespread grassland species are locally adapted at a European scale; (ii) detection of local adaptation depends on competition with the local plant community; and (iii) local differentiation between neighbouring populations from contrasting habitats can be stronger than differentiation at a European scale. 2 Seeds of Holcus lanatus, Lotus corniculatus and Plantago lanceolata from a Swiss, Czech and UK population were sown in a reciprocal transplant experiment at fields that exhibit environmental conditions similar to the source sites. Seedling emergence, survival, growth and reproduction were recorded for two consecutive years. 3 The effect of competition was tested by comparing individuals in weeded monocultures with plants sown together with species from the local grassland community. To compare large-scale vs. small-scale differentiation, a neighbouring population from a contrasting habitat (wet-dry contrast) was compared with the 'home' and 'foreign' populations. 4 In P. lanceolata and H. lanatus, a significant home-site advantage was detected in fitness-related traits, thus indicating local adaptation. In L. corniculatus, an overall superiority of one provenance was found. 5 The detection of local adaptation depended on competition with the local plant community. In the absence of competition the home-site advantage was underestimated in P. lanceolata and overestimated in H. lanatus. 6 A significant population differentiation between contrasting local habitats was found. In some traits, this small-scale was greater than large-scale differentiation between countries. 7 Our results indicate that local adaptation in real plant communities cannot necessarily be predicted from plants grown in weeded monocultures and that tests on the relationship between fitness and geographical distance have to account for habitat-dependent small-scale differentiation. Considering the strong small-scale differentiation, a local provenance from a different habitat may not be the best choice in ecological restoration if distant populations from a more similar habitat are available.

Item Type:Article
Divisions:Life Sciences > School of Agriculture, Policy and Development
Interdisciplinary centres and themes > Soil Research Centre
ID Code:8333
Uncontrolled Keywords:competition, geographical distance, Holcus lanatus, home-site, advantage, Lotus corniculatus, Plantago lanceolata, population, differentiation, provenance choice, reciprocal transplant, ecological, restoration, RECIPROCALLY SOWN POPULATIONS, GENETIC DIFFERENTIATION, NEIGHBOR, RELATIONSHIPS, RANUNCULUS-REPTANS, TRIFOLIUM-REPENS, SEED PROVENANCE, CANADIAN WEEDS, RE-CREATION, PERFORMANCE, VULGARIS

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