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| Wolfrum, Sebastian; Siebrecht, Norman; Papaja-Hülsbergen, Susanne; Lüscher, Gisela; Jeanneret, Philippe; Arndorfer, Michaela; Friedel, Jürgen K.; Paoletti, Mauricio G.; Kainz, Maximilian; Hülsbergen, Kurt-Jürgen; Herzog, Felix. |
| Information on biodiversity and related population parameters are of key importance for assessing ecosystem services or impacts of management decisions in agriculture. However information on this parameters is often not directly measurable. Indicators are a convenient way to gain information on these variables. Here we present Partial Least Squares Path Modeling (PLS-PM) to develop and evaluate complex indicators for biodiversity and related parameters. As an example we use data on Lumbricus terrestris from 76 plots on Bavarian mixed farms to create complex indicators for population viability, management intensity and site potential and model their causal relations. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Surveys and statistics; Indicators and other value-laden measures; Soil biology; Biodiversity and ecosystem services. |
| Ano: 2013 |
URL: http://orgprints.org/21596/1/21596_wolfrum.pdf |
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| Huber, Julia; Papaja-Hülsbergen, Susanne; Wolfrum, Sebastian; Schmid, Harald; Hülsbergen, Kurt-Jürgen. |
| Agroforestry systems provide numerous environmental services. One of the advantages is the increase of biodiversity. Earthworms play a major role in soil fertility and have a key function in ecosystems. Abundance, biomass and the amount of species was measured to quantify the influences of trees on the earthworm population in integrated and organic farming systems. Results showed that in poplar stands the amount of earthworms, especially juvenile, was higher than in winter wheat or lucerne-clover-grass fields. Furthermore the organic farming system had higher earthworm abundance and species richness than the integrated farming system. Regarding tree species poplar had fewer earthworms in total and fewer epigeic species. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil biology; Biodiversity and ecosystem services. |
| Ano: 2013 |
URL: http://orgprints.org/21659/1/21659_huber.pdf |
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