Type of Publication: | Journal article |
URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-139218 |
Author: | Chrobock, Thomas; Kempel, Anne; Fischer, Markus; van Kleunen, Mark |
Year of publication: | 2011 |
Published in: | Basic and Applied Ecology ; 12 (2011), 3. - pp. 244-250. - ISSN 1439-1791 |
DOI (citable link): | https://dx.doi.org/10.1016/j.baae.2011.03.001 |
Summary: |
Traits that differ between invasive alien and native plant species are frequently interpreted as traits conferring invasiveness. However, such differences could reflect an introduction bias of alien species, particularly cultivated ones, or human-mediated selection of cultivars of these species with certain traits. We tested whether this is the case for germination characteristics that are frequently reported to be associated with invasiveness. In a glasshouse experiment, we compared germination characteristics of 42 plant species native to Switzerland and 47 cultivated alien species including 26 cultivars. To test whether differences in germination between these groups of species depend on an important environmental factor, we used two light levels. Cultivated alien plant species germinated earlier and more successfully than related native plant species under both light conditions. Similarly, among cultivated alien species, cultivars germinated earlier and with higher proportions than non-cultivars. Our results indicate that previously reported differences in germination characteristics between invasive alien and native species might reflect introduction bias and human-mediated selection for these characteristics. Nevertheless, because fast and abundant germination is also frequently associated with naturalization and invasiveness among alien introduced species, our results suggest that biased introduction and human-mediated selection of ornamental plants with these characteristics might increase the risk that these species ultimately become invasive. Therefore, it is important that studies testing for determinants of invasiveness include non-invasive alien species in addition to invasive alien species.
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Summary in another language: |
Merkmalsunterschiede zwischen invasiven gebietsfremden und heimischen Pflanzenarten werden oft dahingehend interpretiert, dass sie Invasionen ermöglichen. Allerdings könnten diese Unterschiede auch auf selektiver Einführung und Selektion von gebietsfremden Arten, insbesondere Zierpflanzenarten oder Kulturvarietäten mit diesen Eigenschaften beruhen. Wir untersuchten, ob dies für Keimungseigenschaften, die oft mit Invasivität verbunden werden, der Fall ist. In einem Gewächshausexperiment verglichen wir die Keimungseigenschaften von 42 in der Schweiz heimischen Arten und 47 gebietsfremden Zierpflanzenarten, darunter 26 Kulturvarietäten. Um zu testen, ob Keimungsunterschiede zwischen Zierpflanzenarten und heimischen Arten von einem wichtigen Umweltfaktor abhängig sind, nutzten wir zwei unterschiedliche Lichtintensitäten. Gebietsfremde Zierpflanzenarten keimten im Vergleich zu heimischen Arten früher und mit höheren Keimungsraten unter beiden Lichtintensitäten.Von den Zierpflanzenarten keimten die Kulturvarietäten früher und mit höheren Keimungsraten. Unsere Resultate weisen darauf hin, dass die bisher gefundenen Keimungsmerkmalunterschiede zwischen invasiven gebietsfremden und heimischen Arten selektive Einführung und Selektion widerspiegeln. Da schnelle und reichliche Keimung oft mit Naturalisierung und Invasivität verbunden ist, suggerieren unsere Resultate dass selektive Einführung und Selektion von Kulturpflanzenarten mit diesen Eigenschaften das Invasionsrisiko dieser Arten erhöhen. Aus diesem Grund ist es wichtig, dass Studien, die nach diesen Merkmalen suchen, sowohl invasive als auch nicht-invasive gebietsfremde Arten berücksichtigen.
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Subject (DDC): | 570 Biosciences, Biology |
Keywords: | Alien plant, Exotic plant, Horticulture, Human-mediated selection, Introduction bias, Multi-species comparison, Non-native plant, Ornamentals, Plant invasion |
Link to License: | In Copyright |
Bibliography of Konstanz: | Yes |
CHROBOCK, Thomas, Anne KEMPEL, Markus FISCHER, Mark VAN KLEUNEN, 2011. Introduction bias : Cultivated alien plant species germinate faster and more abundantly than native species in Switzerland. In: Basic and Applied Ecology. 12(3), pp. 244-250. ISSN 1439-1791. Available under: doi: 10.1016/j.baae.2011.03.001
@article{Chrobock2011Intro-13921, title={Introduction bias : Cultivated alien plant species germinate faster and more abundantly than native species in Switzerland}, year={2011}, doi={10.1016/j.baae.2011.03.001}, number={3}, volume={12}, issn={1439-1791}, journal={Basic and Applied Ecology}, pages={244--250}, author={Chrobock, Thomas and Kempel, Anne and Fischer, Markus and van Kleunen, Mark} }
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Chrobock_2011.pdf | 683 |