Interpolation of temperature and non-urban ozone exposure at high spatial resolution over the western United States

Eh, Lee; Hogsett, WE

doi:10.3354/cr018163

Cited by 13 publications

(7 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The remaining four sites were chosen based on a history of minimal human influence associated with factors such as topographic isolation and land‐use history. All sites are in either northern interior Idaho or western Montana: locations where the potential radial growth impacts of either ozone or nitrogen are minimized because of low exposure (Lee & Hogsett, ).…”

Section: Methodsmentioning

confidence: 99%

Analyses of intrinsic water‐use efficiency indicate performance differences of ponderosa pine and Douglas‐fir in response to CO₂ enrichment

Soulé

Knapp

2014

Journal of Biogeography

View full text Add to dashboard Cite

Aim Increasing intrinsic water-use efficiency (iWUE) in trees is a global-scale response to increasing levels of atmospheric carbon dioxide (C a ). Our primary goal was to determine whether significant differences in either iWUE or radial growth exist between locally co-occurring ponderosa pine (Pinus ponderosa var. ponderosa; PIPO) and Douglas-fir (Pseudotsuga menziesii var. glauca; PSME) trees growing in minimally disturbed environments and exposed to gradually increasing levels of C a .Location Northern Rocky Mountains, USA.Methods We developed 14 tree-ring chronologies, calculated basal area increment (BAI) and examined stable carbon isotope ratios (d 13 C) contained in the tree cores to determine: (1) the consistency of climate/BAI responses and iWUE between the two species and the magnitude of climate change for the primary drivers of BAI; (2) changes in iWUE and BAI values during ad 1850present; and (3) the extent of pan-regional consistency in iWUE, BAI and climatic responses.Results PIPO and PSME experienced exponentially increasing iWUE rates during ad 1850-present suggesting either increased net photosynthesis or decreased stomatal conductance, or both. There was pan-regional consistency, with similar temporal trends in iWUE and climate/growth relationships between species. Both species experienced above-average BAI in the latter half of the 20th century despite no favourable changes in climate. We found substantive differences between species as PIPO has experienced greater increases in iWUE and BAI relative to PSME. The trends in BAI and iWUE were significantly correlated for PIPO, but not for PSME.Main conclusions Differential radial growth and iWUE responses exist among co-occurring species and are most pronounced during the period of highest C a . As PIPO and PSME forests have extensive geographical ranges and are critical to North American forestry, any substantive change in forest dynamics related to water use and growth may have ecological and economic implications.

show abstract

Section: Methodsmentioning

confidence: 99%

Analyses of intrinsic water‐use efficiency indicate performance differences of ponderosa pine and Douglas‐fir in response to CO₂ enrichment

Soulé

Knapp

2014

Journal of Biogeography

View full text Add to dashboard Cite

show abstract

“…We selected all sites based on criteria designed to limit the number of potential confounding influences that could affect radial growth. Specifically, our selected sites: 1) were open stands of co-occurring PSME and PIPO trees available in both older (establishing prior to AD 1800) and younger (interior dates post-1875) age classes; 2) had a history of minimal anthropogenic disturbance; 3) are located in interior Idaho and western Montana to negate or minimize potential impacts on radial growth by ozone (Lee and Hogsett, 2001) or nitrogen deposition (Fenn et al, 2003); 4) have no known histories of pandora moth (Coloradia Pandora) Fig. 1.…”

Section: Tree-ring Data Collection and Processingmentioning

confidence: 99%

Radial growth rates of two co-occurring coniferous trees in the Northern Rockies during the past century

Soulé

Knapp

2013

Journal of Arid Environments

View full text Add to dashboard Cite

We examined radial growth rates of locally co-occurring Douglas-fir (PSME e Pseudotsuga menziesii var. glauca) and ponderosa pine (PIPO e Pinus ponderosa var. ponderosa) trees growing within the Northern Rockies to determine if there are differential growth and climatic responses between these species and whether these responses are consistent among topographically and climatologically diverse sites. We developed standardized tree-ring chronologies from seven sites, with each site a matched pair of PSME and PIPO. For each chronology we examined the climate response of radial growth by comparing the standardized ring widths to a suite of climatic variables. We examined temporal changes by comparing 1905e1950 and post-1950 growth rates and climatic conditions. Both conifers experience increased radial growth post-1950. A combination of spring/summer moisture conditions related positively to radial growth and the primary climatic drivers were consistent both between species and within the region. The primary climatic drivers of radial growth remain unchanged during the last century or have trended toward drier conditions unfavorable for growth. We conclude that increases in standardized radial growth rates are unlikely climatically-driven. Other potential vectors of radial growth change, such as atmospheric CO2 enrichment, have affected these co-occurring species on a largely equal basis and positively.

show abstract

“…Chem. 22, 2003 979 to model variation over shorter distances, where assumptions such as stationarity are more likely to be met [20]. The above example is not meant to suggest that kriging approaches are not useful, but it does suggest that there are uncertainties in the use of kriging models that go beyond the uncertainty estimated with any specific model.…”

Section: Spatial Interpolationmentioning

confidence: 99%

“…For example, even if a single variogram is adequate for a kriging analysis, it may not be adequate for assessing the uncertainty of kriged estimates because uncertainty often increases with increases in the mean value [16]. Nonparametric methods of interpolation, such as locally weighted regression, may be useful in situations where assumptions such as stationarity (all data are from the same statistical population) are not met or where multiple predictor variables are used [20]. Such techniques can be used to model spatial patterns over long distances, and then kriging can be used on the residuals to model variation over shorter distances, where assumptions such as stationarity are more likely to be met [20].…”

Section: Introductionmentioning

confidence: 99%

Dos and don'ts of spatially explicit ecological risk assessments

Woodbury

2003

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

Location affects exposure and response to stressors at scales ranging from small sites to large regions. Tools such as geographic information systems (GIS) make it feasible to conduct spatially explicit ecological risk assessments (ERAs). However, no tools provide a panacea, and complex models based on sparse data can be inappropriate and misleading. Operations such as an interpolation within a GIS are models, and so they contain assumptions and uncertainties. Errors can propagate easily as numerous operations are performed, and the resulting uncertainties should be made explicit. Analysts should assure that space actually matters by using explanatory data prior to investigating spatial correlation. Exposure and risk estimates from experimental plots or monitoring stations may require scaling factors if they are to be used for larger watersheds or regional analyses. Maps are useful because they present complex spatial information in a manner that is easily interpreted. However, they must be prepared and interpreted with caution because they can suggest that there is a great deal more information than actually exists. In addition to presenting maps of predicted risks, maps of the spatial patterns in the uncertainties in these risk estimates should be included in risk assessments.

show abstract

Interpolation of temperature and non-urban ozone exposure at high spatial resolution over the western United States

Cited by 13 publications

References 19 publications

Analyses of intrinsic water‐use efficiency indicate performance differences of ponderosa pine and Douglas‐fir in response to CO₂ enrichment

Analyses of intrinsic water‐use efficiency indicate performance differences of ponderosa pine and Douglas‐fir in response to CO₂ enrichment

Radial growth rates of two co-occurring coniferous trees in the Northern Rockies during the past century

Dos and don'ts of spatially explicit ecological risk assessments

Contact Info

Product

Resources

About

Interpolation of temperature and non-urban ozone exposure at high spatial resolution over the western United States

Cited by 13 publications

References 19 publications

Analyses of intrinsic water‐use efficiency indicate performance differences of ponderosa pine and Douglas‐fir in response to CO2 enrichment

Analyses of intrinsic water‐use efficiency indicate performance differences of ponderosa pine and Douglas‐fir in response to CO2 enrichment

Radial growth rates of two co-occurring coniferous trees in the Northern Rockies during the past century

Dos and don'ts of spatially explicit ecological risk assessments

Contact Info

Product

Resources

About

Analyses of intrinsic water‐use efficiency indicate performance differences of ponderosa pine and Douglas‐fir in response to CO₂ enrichment

Analyses of intrinsic water‐use efficiency indicate performance differences of ponderosa pine and Douglas‐fir in response to CO₂ enrichment