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Weigelt, Alexandra ; Steinlein, Thomas ; Beyschlag, Wolfram:
Does plant competition intensity rather depend on biomass or on species identity?
In: Basic and Applied Ecology.
Bd. 3
(2002)
Heft 1
.
- S. 85-94.
ISSN 1439-1791
DOI: https://doi.org/10.1078/1439-1791-00080
Abstract
In two experiments, we tested whether species specific traits or mainly biomass determines the competitive strength of plant individuals in resource-poor habitats. As measure of competition intensity, we calculated the log Response Ratio (lnRR) based on total biomass for three key species of early successional stages on inland dunes. Using seedlings of Corynephorus canescens and Hieracium pilosella in a pot experiment, competition intensity was significantly and positively correlated with the biomass of the respective competitors. In contrast, such a correlation was not detected in a controlled field experiment with adult plants of the two species and of Carex arenaria. However, in both experiments the strength of competitive interactions (measured as lnRR) significantly depended on the identity of the competing species. We conclude, that a biomass advantage over the competitors (which can for instance be achieved by earlier germination) seems to play a crucial role only for successful seedling establishment, while competitive interactions of neighbouring plants depend on species-specific biomass allocation strategies at both developmental stages.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | BAYCEER13967 |
| Keywords: | Corynephorus canescens; Hieracium pilosella; Carex arenaria; log Response Ratio; sandy soil |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Biogeographie Fakultäten Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik |
| Eingestellt am: | 31 Aug 2015 05:51 |
| Letzte Änderung: | 25 Mai 2016 08:42 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/18951 |