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

被引:123
作者
Bischoff, Armin
Cremieux, Lisele
Smilauerova, Marie
Lawson, Clare S.
Mortimer, Simon R.
Dolezal, Jiri
Lanta, Vojtech
Edwards, Andrew R.
Brook, Alex J.
Macel, Mirka
Leps, Jan
Steinger, Thomas
Mueller-Schaerer, Heinz
机构
[1] Univ Fribourg, Dept Biol, Unit Ecol & Evolut, CH-1700 Fribourg, Switzerland
[2] Univ S Bohemia, CZ-37005 Ceske Budejovice, Czech Republic
[3] Univ Reading, Ctr Agrienvironm Res, Reading RG6 6AR, Berks, England
关键词
competition; geographical distance; Holcus lanatus; home-site advantage; Lotus corniculatus; Plantago lanceolata; population differentiation; provenance choice; reciprocal transplant; ecological restoration;
D O I
10.1111/j.1365-2745.2006.01174.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
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.
引用
收藏
页码:1130 / 1142
页数:13
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