Assessing Near Surface Hydrologic Processes and Plant Response over a 1600 m Mountain Valley Gradient in the Great Basin, NV, U.S.A.

This study investigated near surface hydrologic processes and plant response over a 1600 m mountain-valley gradient located in the Great Basin of North America (Nevada, U.S.A.) as part of a long-term climate assessment study. The goal was to assess shifts in precipitation, soil water status and associated drainage with elevation and how this influenced evapotranspiration and plant cover/health estimated by a satellite-derived Normalized Difference Vegetation Index (NDVI), all to better understand how water is partitioned in a mountain valley system. Data were acquired during a three-year period from meteorological stations located in five plant communities ranging in elevation from 1756 m (salt desert shrubland zone) to 3355 m (subalpine zone). The analysis also included groundwater depths measured at the Salt Desert Shrub West site, mine water flow near the Pinyon-Juniper West site and drainage estimates using drainage flux meters at the four higher elevation sites. Annual precipitation increased with elevation in a linear fashion (R2 = 0.93, p < 0.001) with an average increase of 2.9 cm for every 100 m in elevation. Reference evapotranspiration (ETref) declined in a highly linear fashion with elevation (R2 = 0.95, p < 0.001) with an average 4.0 cm decline for every 100 m rise in elevation. Drainage occurred only at the Montane West and Subalpine West sites and not at the lower elevations. No drainage occurred after Julian day 160. Growing degree days were found to be negatively associated with the time of peak drainage (R2 = 0.97, p < 0.001), the date drainage first occurred (R2 = 0.90, p < 0.001), drainage duration (R2 = 0.79, p < 0.001) and total drainage volume (R2 = 0.59, p < 0.001). It was estimated that 27% of precipitation at the Montane West site (years 1, 2 and 3) and 66 % at the Subalpine West site (40% without year 1) contributed to drainage at the local site level, indicating possible strong recharge contribution from the higher elevation plant communities. Percent vegetation cover and ETref accounted for 94% of the variation in NDVI and 90% of the variation in ET totals when data from all sites were combined. Such data will be extremely valuable to collect and compare over time to assess shifts associated with potential climate warming and/or basin water diversion.

[1]  R. Allen,et al.  Assessing the role of climate and resource management on groundwater dependent ecosystem changes in arid environments with the Landsat archive , 2016 .

[2]  Kenneth D. Smith,et al.  Filling the Data Gaps in Mountain Climate Observatories Through Advanced Technology, Refined Instrument Siting, and a Focus on Gradients , 2016, Mountain Research and Development.

[3]  D. Devitt,et al.  Changes in groundwater oscillations, soil water content and evapotranspiration as the water table declined in an area with deep rooted phreatophytes , 2016 .

[4]  H. Steltzer,et al.  Earlier snowmelt and warming lead to earlier but not necessarily more plant growth , 2016, AoB PLANTS.

[5]  B. Scanlon,et al.  Implications of projected climate change for groundwater recharge in the western United States , 2016 .

[6]  Carl F. Salk,et al.  Temperature alone does not explain phenological variation of diverse temperate plants under experimental warming , 2015, Global change biology.

[7]  Pramod Kumar Jha,et al.  Responses of Montane Forest to Climate Variability in the Central Himalayas of Nepal , 2015 .

[8]  K. Hopping,et al.  Predicted responses of arctic and alpine ecosystems to altered seasonality under climate change , 2014, Global change biology.

[9]  Justin L. Huntington,et al.  Use of an Observation Network in the Great Basin to Evaluate Gridded Climate Data , 2014 .

[10]  Lyndsay B. Ball,et al.  Controls on groundwater flow in a semiarid folded and faulted intermountain basin , 2014 .

[11]  J. McDonnell,et al.  Rainfall seasonality and an ecohydrological feedback offset the potential impact of climate warming on evapotranspiration and groundwater recharge , 2014 .

[12]  A. Dai.  The influence of the inter-decadal Pacific oscillation on US precipitation during 1923–2010 , 2013, Climate Dynamics.

[13]  G. Tang,et al.  Trends in surface air temperature and temperature extremes in the Great Basin during the 20th century from ground‐based observations , 2013 .

[14]  Eric Fritzinger,et al.  A Network for Observing Great Basin Climate Change , 2013 .

[15]  M. Goulden,et al.  Evapotranspiration along an elevation gradient in California's Sierra Nevada , 2012 .

[16]  D. Marks,et al.  Long‐Term Soil Water Trends across a 1000‐m Elevation Gradient , 2011 .

[17]  Michael H. Young,et al.  Evapotranspiration of mixed shrub communities in phreatophytic zones of the Great Basin region of Nevada (USA) , 2011 .

[18]  S. Goetz,et al.  High-latitude tree growth and satellite vegetation indices: Correlations and trends in Russia and Canada (1982–2008) , 2011 .

[19]  D. Clow,et al.  Changes in the timing of snowmelt and streamflow in Colorado: a response to recent warming , 2010 .

[20]  Christian Körner,et al.  Phenology Under Global Warming , 2010, Science.

[21]  Christina L. Tague,et al.  Topographic controls on spatial patterns of conifer transpiration and net primary productivity under climate warming in mountain ecosystems , 2009 .

[22]  Jennifer C. Adam,et al.  Implications of global climate change for snowmelt hydrology in the twenty‐first century , 2009 .

[23]  A. Porporato,et al.  Transient soil‐moisture dynamics and climate change in Mediterranean ecosystems , 2008 .

[24]  Christopher von Nagy,et al.  Prolonged suppression of ecosystem carbon dioxide uptake after an anomalously warm year , 2008, Nature.

[25]  D. Pumo,et al.  Ecohydrology in Mediterranean areas: a numerical model to describe growing seasons out of phase with precipitations , 2007 .

[26]  R. Seager,et al.  Model Projections of an Imminent Transition to a More Arid Climate in Southwestern North America , 2007, Science.

[27]  Rik Leemans,et al.  Faculty Opinions recommendation of European phenological response to climate change matches the warming pattern. , 2006 .

[28]  Christopher B. Field,et al.  Diverse responses of phenology to global changes in a grassland ecosystem , 2006, Proceedings of the National Academy of Sciences.

[29]  T. Swetnam,et al.  Warming and Earlier Spring Increase Western U.S. Forest Wildfire Activity , 2006, Science.

[30]  David G. Chandler,et al.  Soil moisture states, lateral flow, and streamflow generation in a semi‐arid, snowmelt‐driven catchment , 2005 .

[31]  T. Barnett,et al.  Potential impacts of a warming climate on water availability in snow-dominated regions , 2005, Nature.

[32]  N. Pettorelli,et al.  Using the satellite-derived NDVI to assess ecological responses to environmental change. , 2005, Trends in ecology & evolution.

[33]  Christopher B Field,et al.  Responses of Grassland Production to Single and Multiple Global Environmental Changes , 2005, PLoS biology.

[34]  R. Reedy,et al.  Ecological controls on water-cycle response to climate variability in deserts , 2005, Proceedings of the National Academy of Sciences of the United States of America.

[35]  Michael D. Dettinger,et al.  Changes toward Earlier Streamflow Timing across Western North America , 2005 .

[36]  H. Guan,et al.  Mountain-Block Hydrology and Mountain-Front Recharge. , 2004 .

[37]  Kevin P. Price,et al.  Relations between NDVI and tree productivity in the central Great Plains , 2004 .

[38]  G. Litus,et al.  Chemical and isotopic evaluation of water sources to the fens of South Park, Colorado , 2003 .

[39]  A. Flint,et al.  Fundamental concepts of recharge in the Desert Southwest: A regional modeling perspective , 2001 .

[40]  I. Rodríguez‐Iturbe.  Ecohydrology: A hydrologic perspective of climate‐soil‐vegetation dynamies , 2000 .

[41]  B. Wilcox,et al.  Tracer-based studies of soil water movement in semi-arid forests of New Mexico , 1997 .

[42]  M. Seyfried,et al.  CALIBRATION OF TIME DOMAIN REFLECTOMETRY FOR MEASUREMENT OF LIQUID WATER IN FROZEN SOILS , 1996 .

[43]  F. Stuart Chapin,et al.  Responses of Arctic Tundra to Experimental and Observed Changes in Climate , 1995 .

[44]  J. Harte,et al.  Shifting Dominance Within a Montane Vegetation Community: Results of a Climate-Warming Experiment , 1995, Science.

[45]  Richard Miller,et al.  HOLOCENE CHANGES IN SEMIARID PINYON-JUNIPER WOODLANDS , 1994 .

[46]  Erzsébet Merényi,et al.  Retrieval of apparent surface reflectance from AVIRIS data: A comparison of empirical line, radiative transfer, and spectral mixture methods , 1994 .

[47]  James L. Wright,et al.  New Evapotranspiration Crop Coefficients , 1982 .

[48]  A. Wagner.  Water Source Partitioning for Shrubland Transpiration in a Mixed Phreatophytic Plant Community , 2016 .

[49]  Keith J. Halford,et al.  Evaluating connection of aquifers to springs and streams, Great Basin National Park and vicinity, Nevada , 2015 .

[50]  Frederick C. Harris,et al.  An Overview of the Nevada Climate Change Portal , 2014 .

[51]  R. M. Lanner,et al.  THE HISTO RICAL STABILITY OF NEVADA'S PINYON-JUNIPER FOREST , 2011 .

[52]  J. Chambers.  Climate change and the Great Basin , 2008 .

[53]  B. Bruce,et al.  Hydrologic and water-quality data for surface water, ground water, and springs in north-central Park County, Colorado, April 1997-November 1998 , 1999 .

[54]  E. Milton,et al.  The use of the empirical line method to calibrate remotely sensed data to reflectance , 1999 .