NDLI: Significance of Legumes for the Distribution of Plant Species in Grassland Ecosystems at Different Altitudes in the Alps

Content Provider	Springer Nature Link
Author	Jacot, Katja A. Lüscher, Andreas Suter, Matthias Nösberger, Josef Hartwig, Ueli A.
Copyright Year	2005
Abstract	The composition of plant species in grassland communities is determined in part by negative and positive interactions among neighbouring plants; such interactions could be dispersal or – in the case of legumes – symbiotic N$_{2}$ fixation or resource acquisition. We hypothesised that small scale distribution of plant species may be in part affected by (i) the plant's narrow dispersal in the close neighbourhood, (ii) by the N input into the soil through symbiotic N$_{2}$ fixation by legumes, and (iii) by small scale heterogeneity of N availability in the soil. To address these hypotheses, in four species-rich semi-natural and natural grasslands along an altitudinal gradient from 900 to 2100 m a.s.l., the association of species that grew within a radius of 5 cm of selected plant species (central plant, CP) was studied. The distribution of the plant species within the plant community was not random and the species composition that grew within a radius of 5 cm of a CP varied with altitude. The strength of the association between a CP and its neighbouring species decreased with increasing altitude. The 5 cm radius was most dominated by individuals of the same species as the CP, suggesting that narrow dispersal (either through seeds or through vegetative propagates) may be most important for the species composition within the sward. δ$^{15}$N values of non leguminous species growing near legumes compared to non leguminous species that grew far from legumes indicate that N from symbiotic N$_{2}$ fixation may be another factor influencing the association of plant species. Effects of small scale heterogeneity in apparent N availability in the soil were detected to be the least important for the species composition.
Starting Page	1
Ending Page	12
Page Count	12
File Format	PDF
ISSN	13850237
Journal	Plant Ecology
Volume Number	180
Issue Number	1
e-ISSN	15735052
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2005-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	High elevation $^{15}$N natural abundance Neighbouring species Symbiotic nitrogen fixation Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology Plant Science

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Significance of Legumes for the Distribution of Plant Species in Grassland Ecosystems at Different Altitudes in the Alps

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