naa a22 4500 510749828 CHVBK 20180411083100.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s11270-013-1663-5 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1663-5 A Comparison of Tension and Zero-Tension Lysimeter and PRS™ Probes for Measuring Soil Water Chemistry in Sandy Boreal Soils in the Athabasca Oil Sands Region, Canada [Elektronische Daten] [Shaun Watmough, Ina Koseva, Amanda Landre] Because soil acidification models use soil solution chemistry as a critical endpoint for predicting adverse biological effects, it is essential that various options for measuring soil water chemistry are assessed. This is particularly true for the Athabasca oil sands region of Alberta, Canada, as widespread acidification impacts are predicted based on modelled soil solution chemistry, but no soil solution data are currently available to validate these estimates. In this study, tension and zero-tension lysimeters were compared over a 3-year period at a jack pine stand (Pinus banksiana Lamb.) established in an acidic, sandy brunisol adjacent (<2km) to one of the largest mines in the region. During the final year, plant root simulator (PRS™) probes were also installed for comparative purposes as they are currently being used in the region to assess changes in soil chemistry. Despite the close proximity to the mine and high sulphur (S) and nitrogen (N) deposition, the annual average pH of the soil water collected by both lysimeter types was around 6.5 and NO3-N concentrations were negligible. Annual SO4 concentrations in tension lysimeters averaged 12-14mgL−1 and were typically two to four times higher than in zero-tension lysimeters; similar differences between lysimeters were observed for divalent base cations (Ca and Mg). Values (ion supply rates) obtained by PRS™ were affected by both the position of the probes (horizontal vs. vertical) and the duration of probe insertion (1, 2 and 5months), such that higher values for most nutrients were obtained using probes that were installed vertically and for shorter periods of time. The Ca/Mg ratio in lysimeters and PRS™ probes were comparable, but other elemental ratios such as Ca/S or Ca/Al were much higher in PRS™ probes than in lysimeter water. Similar to lysimeter data, NO3-N values obtained by PRS™ probes were very low. PRS™ probes may be useful for assessing differences in nutrient availability among sites, but they do not reflect soil water chemistry that is used in geochemical acidification models. Springer Science+Business Media Dordrecht, 2013 Soil solution chemistry nationallicence PRS™ probes nationallicence Acid deposition nationallicence Alberta oil sands nationallicence Lysimeters nationallicence Base cation nationallicence Aluminium nationallicence Watmough Shaun Environmental and Resource Studies Program, Trent University, 1600 West Bank Drive, K0J 7B8, Peterborough, ON, Canada aut Koseva Ina Environmental and Life Sciences Program, Trent University, 1600 West Bank Drive, K0J 7B8, Peterborough, ON, Canada aut Landre Amanda Environmental and Life Sciences Program, Trent University, 1600 West Bank Drive, K0J 7B8, Peterborough, ON, Canada aut Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-13 0049-6979 224:9<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1663-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1663-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Watmough Shaun Environmental and Resource Studies Program, Trent University, 1600 West Bank Drive, K0J 7B8, Peterborough, ON, Canada aut NATIONALLICENCE 700 1- Koseva Ina Environmental and Life Sciences Program, Trent University, 1600 West Bank Drive, K0J 7B8, Peterborough, ON, Canada aut NATIONALLICENCE 700 1- Landre Amanda Environmental and Life Sciences Program, Trent University, 1600 West Bank Drive, K0J 7B8, Peterborough, ON, Canada aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-13 0049-6979 224:9<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer