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Grain-dependent relationships between plant productivity and invertebrate species richness and biomass in calcareous grasslands

Braschler, B. and Zschokke, S. and Dolt, C. and Thommen, G. H. and Oggier, P. and Baur, B.. (2004) Grain-dependent relationships between plant productivity and invertebrate species richness and biomass in calcareous grasslands. Basic and applied ecology, Vol. 5, H. 1. pp. 15-24.

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Official URL: http://edoc.unibas.ch/dok/A4276904

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Abstract

The relationships among productivity, species richness and consumer biomass are of fundamental importance for understanding determinants of biodiversity. These relationships may depend on grain size. We examined the relationships between productivity (above-ground phytomass) and plant species richness and between productivity and species richness and biomass of gastropods and grasshoppers using sampling units of different sizes (0.5, 2.75 and 23 m(2)) in nutrient-poor, calcareous grasslands in north-western Switzerland in two successive years. Species richness of forbs had a unimodal relationship with productivity in sampling units of 0.5 m(2) and was negatively correlated with productivity at the other two plot sizes in one year. In the other year, forb species richness tended to decrease with productivity in sampling units of 23 m(2). No similar relationship was found for grasses. Gastropod biomass had a unimodal relationship with productivity at 0.5 m(2) in the first year. Grasshopper species richness was correlated with forb species richness at plot sizes of 2.75 and 23 m(2). This study demonstrates that patterns detected between productivity and diversity and between productivity and biomass of consumers depend on the grain size used in the investigation and vary among years. Betr. Untersuchungsgebiete im Nordwestschweizer Jura in Nenzlingen, Movelier und Vicques
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Natur- Landschafts- und Umweltschutz > Naturschutzbiologie (Baur)
UniBasel Contributors:Zschokke, Samuel and Baur, Bruno
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Elsevier
ISSN:1439-1791
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:14 Sep 2012 06:54
Deposited On:22 Mar 2012 14:03

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