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The influence of arbuscular mycorrhizae and light on Wisconsin (USA) sand savanna understories 1. Plant community composition.

Identifieur interne : 003525 ( Main/Corpus ); précédent : 003524; suivant : 003526

The influence of arbuscular mycorrhizae and light on Wisconsin (USA) sand savanna understories 1. Plant community composition.

Auteurs : Frank C. Landis ; Andrea Gargas ; Thomas J. Givnish

Source :

RBID : pubmed:15952016

English descriptors

Abstract

To explain the complex community composition found in Wisconsin (USA) oak savannas, we investigated potentially interacting effects of light gradients and arbuscular mycorrhizal fungi (AMF) on community composition in the greenhouse, using a fully randomized block experimental design. We used plant species, soil, and AMF from a remnant sand savanna in setting up the experiment, using two light and five AMF treatments. Eleven plant species were seeded into 80 microcosms, and they were grown together for 20 weeks. Plant numbers and biomass were measured, and Simpson's index was calculated for both. Data were analyzed using ANOVA and nonparametric ANOVA. We found significant light effects on biomass and on numbers of four species. There were no treatment effects on Simpson's index, and only Schizachyrium numbers showed a significant AMF effect. These findings are consistent with results from other studies of the sand savanna, and, collectively, these data suggest that plant community composition in this species-rich savanna is not strongly influenced by arbuscular mycorrhizae. This is a novel finding with important implications for understanding interactions between plant and AMF diversity in wild communities.

DOI: 10.1007/s00572-005-0365-2
PubMed: 15952016

Links to Exploration step

pubmed:15952016

Le document en format XML

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