Effects of Best Management Practice on Ecological Condition: Does Location Matter?

Environmental Management
Roger HolmesAdam G Yates

Abstract

Best management practices (BMPs) are increasingly being promoted as a solution to the potentially adverse effects agriculture can have on aquatic systems. However, the ability of BMPs to improve riverine systems continues to be questioned due to equivocal empirical evidence linking BMP use with improved stream conditions, particularly in regard to ecological conditions. Explicitly viewing BMP location in relation to hydrological pathways may, however, assist in establishing stronger ecological linkages. The goal of this study was to assess the association between water chemistry, benthic macroinvertebrate community structure, and the number and location of agricultural BMPs in a catchment. Macroinvertebrate and water samples were collected in 30 small (<12 km(2)) catchments exhibiting gradients of BMP use and location in the Grand River Watershed, Southern Ontario, Canada. Stepwise regression analysis revealed that concentrations of most stream nutrients declined in association with greater numbers of BMPs and particularly when BMPs were located in hydrologically connected areas. However, BMPs were significantly associated with only one metric (%EPT) describing macroinvertebrate community structure. Furthermore, variance partit...Continue Reading

References

Jul 16, 2004·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Nicholas J Gotelli
Jun 29, 2007·Journal of Environmental Quality·Paul M MayerTimothy J Canfield
Jun 12, 1970·Science·W H Berger, F L Parker
Aug 12, 2008·Journal of Environmental Quality·Zachary M EastonTammo S Steenhuis
Oct 4, 2008·Ecology·F Guillaume BlanchetDaniel Borcard
Nov 15, 2008·Journal of Environmental Management·Nalini S RaoTammo S Steenhuis

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Citations

Jun 3, 2020·Ecological Applications : a Publication of the Ecological Society of America·Joseph StachelekP A Soranno

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