Abstract
Estimates of increased nutrient export caused by forest clear-cuttings are mostly based on long-term paired catchment studies, where the treatment effect is calculated using pre-treatment dataset regression and post-treatment records of nutrient loads. In these studies uncertainty in the regression between the pre-treatment loads from the control and from the treatment catchments is typically neglected, even though it affects determination of the magnitude and duration of the treatment effect. This uncertainty is described in terms of variance in regression coefficients and residuals. The aim was to study how uncertainty in a pre-treatment dataset is propagated to estimates of the treatment effects using two sets of paired catchment data in eastern Finland, where the total phosphorus loads following forest clear-cutting and site preparation were investigated. The results showed that neglecting the uncertainty in the pre-treatment data did not change the conclusions when the treatment effect was strong enough. However, when the treatment effect was small, neglecting the uncertainty in the pre-treatment dataset easily leads to over-interpretation of the results. The uncertainty in a pre-treatment dataset should be taken into account in the paired catchment studies in order to avoid bias in the estimation of management effects on the loads.
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References
Ahtiainen, M., & Huttunen, P. (1999). Long-term effects of forestry managements on water quality and loading in brooks. Boreal Environmental Research, 4, 101–114.
Alatalo, M. (2000). Metsätaloustoimenpiteistä aiheutunut ravine- ja kiintoainekuormitus [The effects of forest management on the loading of nutrient and suspended solids]. The Finnish Environment, 381. In Finnish with English summary.
Korsman, K., Koistinen, T., Kohonen, J., Wennervirta, M., Ekdahl, E., Honkamo, M., Idman, H., & Pekkala, Y. (1997). Bedrock map of Finland 1:1,000,000. Espoo: Geological Survey of Finland.
Bren, L., & Hopmans, P. (2007). Paired catchments observations on the water yield of mature eucalypt and immature radiate pine plantations in Victoria, Australia. Journal of Hydrology (Amsterdam), 336, 416–429. doi:10.1016/j.jhydrol.2007.01.018.
Cosby, B. J., Norton, S. A., & Kahl, J. S. (1996). Using paired-catchment manipulation experiment to evaluate a catchment-scale biogeochemical model. The Science of the Total Environment, 183, 49–66. doi:10.1016/0048-9697(95)04965-7.
Drebs, A., Nordlund, A., Karlsson, P., Helminen, J., & Rissanen, P. (2002). Climatological statistics of Finland 1971–2000. Helsinki: Finnish Meteorological Institute.
Giesler, R., Petersson, T., & Högberg, P. (2002). Phosphorus limitation in boreal forests: Effects of aluminium and iron accumulation in the humus layer. Ecosystems (New York, N.Y.), 5, 300–314. doi:10.1007/s10021-001-0073-5.
Grip, H. (1982). Water chemistry and runoff in forest streams in Kloten. UNGI Report 58. Division of Hydrology, Department of Physical Geography, Uppsala University.
Jensen, M. B., Hansen, H. C. B., Nielsen, N. E., & Magid, J. (1999). Phosphate leaching from intact soil column in response to reducing conditions. Water, Air, and Soil Pollution, 113, 411–423. doi:10.1023/A:1005092704105.
Joensuu, S., Ahti, E., & Vuollekoski, M. (1999). The effects of peatland forest ditch maintenance on suspended solids in runoff. Boreal Environmental Research, 4, 343–355.
Joensuu, S., Ahti, E., & Vuollekoski, M. (2002). Effects of ditch network maintenance on the chemistry of run-off water from peatland forests. Scandinavian Journal of Forest Research, 17, 238–247. doi:10.1080/028275802753742909.
Kellogg, L. E., & Bridgham, S. D. (2003). Phosphorus retention and movement across an ombrotrophic–minerotrophic peatland gradient. Biogeochemistry, 69, 299–315. doi:10.1023/A:1023387019765.
Kenttämies, K. (2006). A method for calculating nutrient loads from forestry: Principles and national applications in Finland. In J. Jones (Ed.), International association of theoretical and applied limnology—Proceedings, 29 (pp. 1591–1594). Stuttgart: E Schweizebartsche Verlagsbuchhandlung.
Kim, C., Sharik, T. L., & Jurgensen, M. F. (1996). Canopy cover effects on mass loss, and nitrogen and phosphorus dynamics from decomposing litter in oak and pine stands in northern Lower Michigan. Forest Ecology and Management, 80, 13–20. doi:10.1016/0378-1127(95)03653-9.
Lepistö, A., Kenttämies, K., & Rekolainen, S. (2001). Modelling combined effects of forestry, agriculture and deposition on nitrogen export in a northern river basin in Finland. Ambio, 30(6), 338–348. doi:10.1639/0044-7447(2001)030[0338:MCEOFA]2.0.CO;2.
Lepistö, A., Granlund, K., Kortelainen, P., & Räike, A. (2006). Nitrogen in river basins: Sources, retention in the surface waters and peatlands, and fluxes to estuaries in Finland. The Science of the Total Environment, 365, 238–259. doi:10.1016/j.scitotenv.2006.02.053.
Li, Y. C., Alva, A. K., & Calvert, D. V. (1999). Transport of phosphorus and fractionation of residual phosphorus in various horizons of a spodosol. Water, Air, and Soil Pollution, 109, 313–312. doi:10.1023/A:1005081313400.
Metsätilastollinen vuosikirja (2006). Finnish statistical yearbook of forestry. Metsäntutkimuslaitos. Finnish Forest Research Institute. SVT. Maa-, metsä- ja kalatalous 2006. Agriculture, Fishery and Forestry. 438 p.
Neal, C. (2002). Assessing environmental impacts on stream water quality: The use of cumulative flux and cumulative flux difference approaches to deforestation of the Hafren Forest, mid-Wales. Hydrology and Earth System Sciences, 6(3), 421–431.
Nieminen, M. (2004). Export of dissolved organic carbon, nitrogen and phosphorus following clear-cutting of three Norway spruce forests growing on drained peatlands. Silva Fennica, 38(2), 123–132.
Palviainen, M., Finér, L., Kurka, A.-M., Mannerkoski, H., Piirainen, S., & Starr, M. (2004). Decomposition and nutrient release from logging residues after clear-cutting of mixed boreal forest. Plant and Soil, 263, 53–67. doi:10.1023/B:PLSO.0000047718.34805.fb.
Piirainen, S., Finér, L., Mannerkoski, H., & Starr, M. (2004). Effects of forest clear-cutting on sulphur, phosphorus and base cation fluxes through podzolic soil horizons. Biogeochemistry, 69, 405–424. doi:10.1023/B:BIOG.0000031061.80421.1b.
Reynolds, B., Stevens, P. A., Hughes, S., Parkinson, J. A., & Weatherley, N. S. (1995). Stream chemistry impacts of conifer harvesting in Welsh catchments. Water, Air, and Soil Pollution, 79, 147–170. doi:10.1007/BF01100435.
Rosén, K. (1984). Effect of clear-felling on runoff in two small watersheds in central Sweden. Forest Ecology and Management, 9, 267–281. doi:10.1016/0378-1127(84)90013-6.
Rosén, K., Aronson, J.-A., & Eriksson, H. M. (1996). Effects of clear-cutting on stream water quality in forest catchments in central Sweden. Forest Ecology and Management, 83, 237–244. doi:10.1016/0378-1127(96)03718-8.
Schindler, D. W. (1998). Sustaining aquatic ecosystems in boreal regions. Conservation Ecology, 2(2), 18.
Scott, D. (1999). Managing riparian zone vegetation to sustain streamflow: results of paired catchment experiment in South Africa. Canadian Journal of Forest Research, 29, 1149–1157. doi:10.1139/cjfr-29-7-1149.
Searle, S. R. (1997). Linear models. New York: Wiley.
Silvan, N., Karsisto, M., Vasander, H., & Laine, J. (2003). Microbial retention of added nitrogen and phosphorus in constructed wetland buffer. Applied Soil Ecology, 24, 143–149. doi:10.1016/S0929-1393(03)00092-1.
Silvan, N., Tuittila, E.-S., Vasander, H., & Laine, J. (2004). Eriophorum vaginatum plays a major role in nutrient retention in boreal peatlands. Annales Botanici Fennici, 41, 189–199.
Stadler, D., Wunderli, H., Auckenthaler, A., Fluhler, H., & Brundl, M. (1998). Measurement of frost-induced snowmelt runoff in a forest soil. Hydrological Processes, 10, 1293–1304. doi:10.1002/(SICI)1099-1085(199610)10:10<1293::AID-HYP461>3.0.CO;2-I.
Stevenson, F. J., & Cole, M. A. (1999). Cycles of soil: Carbon, nitrogen, phosphorus, sulphur, micronutrients (2nd ed.). New York: Wiley.
Väänänen, R., Nieminen, M., Vuollekoski, M., & Ilvesniemi, H. (2006). Retention of phosphorus in soil and vegetation of a buffer zone area during snowmelt peak flow in southern Finland. Water, Air, and Soil Pollution, 177, 103–116. doi:10.1007/s11270-006-9106-1.
Watson, F., Vertessy, R., McMahon, T., Rhodes, B., & Watson, I. (2001). Improved methods to assess water yield changes from paired-catchment studies: Application to the Maroondah catchments. Forest Ecology and Management, 143, 189–204. doi:10.1016/S0378-1127(00)00517-X.
Acknowledgements
This work was carried out as a part of the “Tools for water protection in forestry” project, financed by the Ministry of Agriculture and Forestry (HAME).
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Laurén, A., Heinonen, J., Koivusalo, H. et al. Implications of Uncertainty in a Pre-treatment Dataset when Estimating Treatment Effects in Paired Catchment Studies: Phosphorus Loads from Forest Clear-cuts. Water Air Soil Pollut 196, 251–261 (2009). https://doi.org/10.1007/s11270-008-9773-1
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DOI: https://doi.org/10.1007/s11270-008-9773-1