All Outputs (90)

The effect of fallow period length on the abundance and diversity of usable plant assemblages in shifting cultivation system (Swidden agriculture) in northern Laos (2016)
Journal Article
Delang, C. O., Weiyi, X., Brooke, B., & Chun, K. P. (2016). The effect of fallow period length on the abundance and diversity of usable plant assemblages in shifting cultivation system (Swidden agriculture) in northern Laos. Polish Journal of Ecology, 64(3), 350-356. https://doi.org/10.3161/15052249PJE2016.64.3.005

Shifting cultivation, or swiddening, involves alternating cycles of cropping and fallow periods. Rather than being abandoned, the fallow swidden fields provide a source of important plant products for remote, forest-dwelling human communities. In nor... Read More about The effect of fallow period length on the abundance and diversity of usable plant assemblages in shifting cultivation system (Swidden agriculture) in northern Laos.

Quantifying spatial changes in the structure of water quality constituents in a large prairie river within two frameworks of a water quality model (2016)
Journal Article
Hosseini, N., Chun, K. P., & Lindenschmidt, K. E. (2016). Quantifying spatial changes in the structure of water quality constituents in a large prairie river within two frameworks of a water quality model. Water, 8(4), Article 158. https://doi.org/10.3390/w8040158

A global sensitivity analysis was carried out on a water quality model to quantify the spatial changes in parameter sensitivity of a model of a large prairie river, the South Saskatchewan River (SSR). The method is used to assess the relative impacts... Read More about Quantifying spatial changes in the structure of water quality constituents in a large prairie river within two frameworks of a water quality model.

What is the most efficient and effective method for long-term monitoring of alpine tundra vegetation? (2016)
Journal Article
Mamet, S. D., Young, N., Chun, K. P., & Johnstone, J. F. (2016). What is the most efficient and effective method for long-term monitoring of alpine tundra vegetation?. Arctic Science, 2(3), 127-141. https://doi.org/10.1139/as-2015-0020

Nondestructive estimations of plant community characteristics are essential to vegetation monitoring programs. However, there is no universally accepted method for this purpose in the Arctic, partly because not all programs share the same logistical... Read More about What is the most efficient and effective method for long-term monitoring of alpine tundra vegetation?.

Insights into plant water uptake from xylem-water isotope measurements in two tropical catchments with contrasting moisture conditions (2016)
Journal Article
Evaristo, J., McDonnell, J. J., Scholl, M. A., Bruijnzeel, L. A., & Chun, K. P. (2016). Insights into plant water uptake from xylem-water isotope measurements in two tropical catchments with contrasting moisture conditions. Hydrological Processes, 30(18), 3210-3227. https://doi.org/10.1002/hyp.10841

Water transpired by trees has long been assumed to be sourced from the same subsurface water stocks that contribute to groundwater recharge and streamflow. However, recent investigations using dual water stable isotopes have shown an apparent ecohydr... Read More about Insights into plant water uptake from xylem-water isotope measurements in two tropical catchments with contrasting moisture conditions.

Dynamic water quality modelling and uncertainty analysis of phytoplankton and nutrient cycles for the upper South Saskatchewan River (2015)
Journal Article
Akomeah, E., Chun, K. P., & Lindenschmidt, K. E. (2015). Dynamic water quality modelling and uncertainty analysis of phytoplankton and nutrient cycles for the upper South Saskatchewan River. Environmental Science and Pollution Research, 22(22), 18239-18251. https://doi.org/10.1007/s11356-015-4970-0

The surface water quality of the upper South Saskatchewan River was modelled using Water Quality Analysis Simulation Program (WASP) 7.52. Model calibration and validation were based on samples taken from four long-term water quality stations during t... Read More about Dynamic water quality modelling and uncertainty analysis of phytoplankton and nutrient cycles for the upper South Saskatchewan River.

Who smells? Forecasting taste and odor in a drinking water reservoir (2015)
Journal Article
Kehoe, M. J., Chun, K. P., & Baulch, H. M. (2015). Who smells? Forecasting taste and odor in a drinking water reservoir. Environmental Science and Technology, 49(18), 10984-10992. https://doi.org/10.1021/acs.est.5b00979

Taste and odor problems can impede public trust in drinking water and impose major costs on water utilities. The ability to forecast taste and odor events in source waters, in advance, is shown for the first time in this paper. This could allow water... Read More about Who smells? Forecasting taste and odor in a drinking water reservoir.

Tree rings provide early warning signals of jack pine mortality across a moisture gradient in the southern boreal forest (2015)
Journal Article
Mamet, S. D., Chun, K. P., Metsaranta, J. M., Barr, A. G., & Johnstone, J. F. (2015). Tree rings provide early warning signals of jack pine mortality across a moisture gradient in the southern boreal forest. Environmental Research Letters, 10(8), https://doi.org/10.1088/1748-9326/10/8/084021

Recent declines in productivity and tree survival have been widely observed in boreal forests. We used early warning signals (EWS) in tree ring data to anticipate premature mortality in jack pine (Pinus banksiana) - an extensive and dominant species... Read More about Tree rings provide early warning signals of jack pine mortality across a moisture gradient in the southern boreal forest.

An efficient calibration technique for heat dissipation matric water potential sensors (2015)
Journal Article
Pan, X., Ireson, A. M., Helgason, W., & Chun, K. P. (2015). An efficient calibration technique for heat dissipation matric water potential sensors. Soil Science Society of America Journal, 79(4), 1115-1122. https://doi.org/10.2136/sssaj2014.10.0413

Heat dissipation sensors are used to measure matric potential in soils. A van Genuchten equation can be used to fit the relationship between measured heat dissipation and matric potential. Calibration is required for each probe because of intrinsic v... Read More about An efficient calibration technique for heat dissipation matric water potential sensors.

Unpacking viewpoints on water security: Lessons from the South Saskatchewan River Basin (2015)
Journal Article
Strickert, G., Chun, K. P., Bradford, L., Clark, D., Gober, P., Reed, M. G., & Payton, D. (2016). Unpacking viewpoints on water security: Lessons from the South Saskatchewan River Basin. Water Policy, 18(1), 50-72. https://doi.org/10.2166/wp.2015.195

Water is essential for human development and the environment; however, its security is challenged by factors such as competing uses, over extraction, and divergent perspectives. The focus of this paper is to better understand how different stakeholde... Read More about Unpacking viewpoints on water security: Lessons from the South Saskatchewan River Basin.

Temporal dynamics of catchment transit times from stable isotope data (2015)
Journal Article
Klaus, J., Chun, K. P., McGuire, K. J., & McDonnell, J. J. (2015). Temporal dynamics of catchment transit times from stable isotope data. Water Resources Research, 51(6), 4208-4223. https://doi.org/10.1002/2014WR016247

Time variant catchment transit time distributions are fundamental descriptors of catchment function but yet not fully understood, characterized, and modeled. Here we present a new approach for use with standard runoff and tracer data sets that is bas... Read More about Temporal dynamics of catchment transit times from stable isotope data.

Beaver-mediated methane emission: The effects of population growth in Eurasia and the Americas (2015)
Journal Article
Whitfield, C. J., Baulch, H. M., Chun, K. P., & Westbrook, C. J. (2015). Beaver-mediated methane emission: The effects of population growth in Eurasia and the Americas. AMBIO: A Journal of the Human Environment, 44(1), 7-15. https://doi.org/10.1007/s13280-014-0575-y

Globally, greenhouse gas budgets are dominated by natural sources, and aquatic ecosystems are a prominent source of methane (CH4) to the atmosphere. Beaver (Castor canadensis and Castor fiber) populations have experienced human-driven change, and CH4... Read More about Beaver-mediated methane emission: The effects of population growth in Eurasia and the Americas.

North American precipitation isotope (δ18O) zones revealed in time series modeling across Canada and northern United States (2015)
Journal Article
Delavau, C., Chun, K. P., Stadnyk, T., Birks, S. J., & Welker, J. M. (2015). North American precipitation isotope (δ18O) zones revealed in time series modeling across Canada and northern United States. Water Resources Research, 51(2), 1284-1299. https://doi.org/10.1002/2014WR015687

Delineating spatial patterns of precipitation isotopes ("isoscapes") is becoming increasingly important to understand the processes governing the modern water isotope cycle and their application to migration forensics, climate proxy interpretation, a... Read More about North American precipitation isotope (δ18O) zones revealed in time series modeling across Canada and northern United States.

Divergent Perspectives on Water Security: Bridging the Policy Debate (2015)
Journal Article
Gober, P. A., Strickert, G. E., Clark, D. A., Chun, K. P., Payton, D., & Bruce, K. (2015). Divergent Perspectives on Water Security: Bridging the Policy Debate. Professional Geographer, 67(1), 62-71. https://doi.org/10.1080/00330124.2014.883960

Environmental policy discussion is replete with references to water security, food security, ecosystem health, community resilience, sustainable development, and sustainable urbanism. These terms are, by their very nature, ambiguous and difficult to... Read More about Divergent Perspectives on Water Security: Bridging the Policy Debate.

Temporal trends in δ18O composition of precipitation in Germany: Insights from time series modelling and trend analysis (2014)
Journal Article
Klaus, J., Chun, K. P., & Stumpp, C. (2015). Temporal trends in δ18O composition of precipitation in Germany: Insights from time series modelling and trend analysis. Hydrological Processes, 29(12), 2668-2680. https://doi.org/10.1002/hyp.10395

Temporal and spatial variations of stable oxygen (18O) and hydrogen (2H) isotope measurements in precipitation act as important proxies for changing hydro-meteorological and regional and global climate patterns. Temporal trends in time series of the... Read More about Temporal trends in δ18O composition of precipitation in Germany: Insights from time series modelling and trend analysis.

Effects of initial soil water content and saturated hydraulic conductivity variability on small watershed runoff simulation using LISEM (2014)
Journal Article
Hu, W., She, D., Shao, M., Chun, K. P., & Si, B. (2015). Effects of initial soil water content and saturated hydraulic conductivity variability on small watershed runoff simulation using LISEM. Hydrological Sciences Journal, 60(6), 1137-1154. https://doi.org/10.1080/02626667.2014.903332

Abstract: Soil water content (θ) and saturated hydraulic conductivity (Ks) vary in space. The objective of this study was to examine the effects of initial soil water content (θi) and Ks variability on runoff simulations using the LImburg Soil Erosio... Read More about Effects of initial soil water content and saturated hydraulic conductivity variability on small watershed runoff simulation using LISEM.

Geospatial modelling to determine the behaviour of ice cover formation during freeze-up of the Dauphin River in Manitoba (2014)
Journal Article
Lindenschmidt, K. E., & Chun, K. P. (2014). Geospatial modelling to determine the behaviour of ice cover formation during freeze-up of the Dauphin River in Manitoba. Hydrology Research, 45(4-5), 645-659. https://doi.org/10.2166/nh.2013.193

During the formation of a frazil-generated ice cover, ice bridging can occur along sections of rivers that are geomorphologically suited (e.g. very sinuous, narrowing channel width, low gradient bed slope) to arrest the flow of ice pans. Bridging may... Read More about Geospatial modelling to determine the behaviour of ice cover formation during freeze-up of the Dauphin River in Manitoba.

A multivariate comparison of the BERMS flux-tower climate observations and Canadian Coupled Global Climate Model (CGCM3) outputs (2014)
Journal Article
Chun, K. P., Wheater, H. S., & Barr, A. G. (2014). A multivariate comparison of the BERMS flux-tower climate observations and Canadian Coupled Global Climate Model (CGCM3) outputs. Journal of Hydrology, 519(PB), 1537-1550. https://doi.org/10.1016/j.jhydrol.2014.08.059

Multiple variables from simulated climate fields are widely used in hydrological and ecological models and climate impact assessments, yet the importance of multivariate climate relationships is not widely recognised. This study evaluates climatic ou... Read More about A multivariate comparison of the BERMS flux-tower climate observations and Canadian Coupled Global Climate Model (CGCM3) outputs.

Dexamethasone exacerbates cerebral edema and brain injury following lithium-pilocarpine induced status epilepticus (2014)
Journal Article
Duffy, B. A., Chun, K. P., Ma, D., Lythgoe, M. F., & Scott, R. C. (2014). Dexamethasone exacerbates cerebral edema and brain injury following lithium-pilocarpine induced status epilepticus. Neurobiology of Disease, 63, 229-236. https://doi.org/10.1016/j.nbd.2013.12.001

Anti-inflammatory therapies are the current most plausible drug candidates for anti-epileptogenesis and neuroprotection following prolonged seizures. Given that vasogenic edema is widely considered to be detrimental for outcome following status epile... Read More about Dexamethasone exacerbates cerebral edema and brain injury following lithium-pilocarpine induced status epilepticus.

Precipitation downscaling in Canadian prairie provinces using the LARS-WG and GLM approaches (2013)
Journal Article
Chun, K. P., Wheater, H. S., Nazemi, A., & Khaliq, M. N. (2013). Precipitation downscaling in Canadian prairie provinces using the LARS-WG and GLM approaches. Canadian Water Resources Journal, 38(4), 311-332. https://doi.org/10.1080/07011784.2013.830368

Two stochastic precipitation simulation models, namely the Long Ashton Research Station weather generator (LARS-WG) and a Generalized Linear Model-based weather generator (GLM-WG), are evaluated for downscaling daily precipitation at four selected lo... Read More about Precipitation downscaling in Canadian prairie provinces using the LARS-WG and GLM approaches.

Evaluating the impact of fluvial geomorphology on river ice cover formation based on a global sensitivity analysis of a river ice model (2013)
Journal Article
Lindenschmidt, K. E., & Chun, K. P. (2013). Evaluating the impact of fluvial geomorphology on river ice cover formation based on a global sensitivity analysis of a river ice model. Canadian Journal of Civil Engineering, 40(7), 623-632. https://doi.org/10.1139/cjce-2012-0274

In 2011, Manitoba was stricken by wide-scale flooding causing high flows along the Dauphin River. The unprecedented high discharges at freeze-up created the potential for excessive ice cover thickening and backwater staging exacerbating the flood ris... Read More about Evaluating the impact of fluvial geomorphology on river ice cover formation based on a global sensitivity analysis of a river ice model.