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Does plant competition intensity rather depend on biomass or on species identity?

Title data

Weigelt, Alexandra ; Steinlein, Thomas ; Beyschlag, Wolfram:
Does plant competition intensity rather depend on biomass or on species identity?
In: Basic and Applied Ecology. Vol. 3 (2002) Issue 1 . - pp. 85-94.
ISSN 1439-1791
DOI: https://doi.org/10.1078/1439-1791-00080

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER13967
Keywords: Corynephorus canescens; Hieracium pilosella; Carex arenaria; log Response Ratio; sandy soil
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Biogeography
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 31 Aug 2015 05:51
Last Modified: 25 May 2016 08:42
URI: https://eref.uni-bayreuth.de/id/eprint/18951