Jan Valckx
Katholieke Universiteit Leuven
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Publication
Featured researches published by Jan Valckx.
Archive | 2011
Jan Valckx; Gerard Govers; Martin Hermy; Bart Muys
To quantify the role of earthworms in ecosystems, a precise and accurate estimation of their diversity, abundance and biomass is needed. In this chapter, we contribute to the optimization of earthworm sampling in terms of (1) how to sample, (2) where to sample and (3) how many samples to take. First, we assess optimal concentrations of chemical expellants (allyl isothiocyanate (AITC) and mustard) recently recommended for earthworm sampling. The efficiency of these vermifuges is then evaluated against formalin application using a combined earthworm sampling method (extraction followed by hand sorting). Practical considerations are discussed. Like many living organisms, earthworm populations are neither uniformly nor randomly distributed, but exhibit an aggregated distribution in patches. The range of spatial autocorrelation in these patches is an important variable to consider in spatial sampling designs. Based on a literature overview, guidelines for spatial sampling design are presented. Finally, species rarefaction curves are used to determine the optimal sample size to accurately represent earthworm diversity.
Agriculture, Ecosystems & Environment | 2007
N. Van Cauwenbergh; Katarzyna Biala; Charles Bielders; Véronique Brouckaert; L. Franchois; V. Garcia Cidad; Martin Hermy; Erik Mathijs; Bart Muys; J. Reijnders; Xavier Sauvenier; Jan Valckx; Marnik Vanclooster; B. Van der Veken; Erwin Wauters; Alain Peeters
Applied Soil Ecology | 2009
Jan Valckx; Liesbet Cockx; Johan Wauters; Marc Van Meirvenne; Gerard Govers; Martin Hermy; Bart Muys
Journal of Hydrology | 2011
Christoph Langhans; Gerard Govers; Jan Diels; Annemie Leys; Wim Clymans; An Van den Putte; Jan Valckx
Pedobiologia | 2011
Jan Valckx; Andrea Cordón Pina; Gerard Govers; Martin Hermy; Bart Muys
Pedobiologia | 2010
Jan Valckx; Annabel Pennings; Toon Leroy; Daniel Berckmans; Gerard Govers; Martin Hermy; Bart Muys
Framework for assessing sustainability levels in Belgian agricultural systems - SAFE. Part 1: Sustainable production and consumption patterns. Final report - SPSD II CP 28 | 2006
Xavier Sauvenier; Jan Valckx; N. Van Cauwenbergh; Erwin Wauters; Hrabrin Ianouchev Bachev; Katarzyna Biala; Charles Bielders; Véronique Brouckaert; Visi Garcia Cidad; S Goyens; Martin Hermy; E. Mathijs; Bart Muys; Marnik Vanclooster; Alain Peeters
European Journal of Soil Biology | 2006
Jan Valckx; Martin Hermy; Bart Muys
Sustainable grazing, nutritional utilisation and quality of sheep and goat products. Proceedings of the first seminar of the FAO-CIHEAM and Mountain and Mediterranean pasture sub-networks | 2005
Alain Peeters; Katarzyna Biala; Véronique Brouckaert; V. Garcia; Martin Hermy; Bart Muys; B. Van der Veken; Jan Valckx; Erik Mathijs; L. Franchois; Marnik Vanclooster; Charles Bielders; J. Reijnders; N. Van Cauwenbergh
Abstractenbook | 2008
Annabel Pennings; Jan Valckx; Gerard Govers; Martin Hermy; Bart Muys
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