15 research outputs found
Supplement 1. R scripts for conducting clear sky PAR simulations described in the main text.
<h2>File List</h2><div>
<p><a href="Clear Sky PAR Model.txt">Clear Sky PAR Model.txt</a> (MD5: 487aee68581be90fc60476a2c3af1b2d)</p>
</div><h2>Description</h2><div>
<p>The code included in <i>Clear Sky PAR Model.R</i> allows conducting the model of clear sky PAR used for calibration of PAR sensors as described in the methods section of the main text.</p>
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Characteristics of tree species selected for analysis of foliar properties.
<p>*Across all study sites, α = selected for individual species response analyses.</p
Best subsets models of leaf traits versus stand age, species successional status, and Principal Component Analysis (PCA) derived gradients in stand biomass and structure, and soil texture and fertility.
<p>Data represents the <i>t</i>-ratio (<i>F</i>-ratio) and <i>P</i>-value significance, with increasing * representing <i>P</i>-values of 0.1, 0.05, 0.01, and 0.001, respectively, and φ <0.0001.</p
Regressions of foliar variables versus stand age (years)/species successional status (years).
<p>Statistics provided are Adj-<i>R</i><sup>2</sup> (F) <i>df</i> and <i>P</i>-value. Model comparisons are conducted using the F-test in R and <i>P</i>-values are presented as: blank <0.1, *<0.05, **<0.01, ***<0.001, ****<0.0001.</p
Foliar δ<sup>15</sup>N and δ<sup>13</sup>C values versus stand age and species successional status.
<p>Significant linear regressions are shown in grey.</p
Selected soil properties for successional forest study sites.
<p>Significant linear regressions are shown in grey (<i>N</i> = 13). Linear regressions for soil δ<sup>15</sup>N were significant using separate depth points (<i>N = </i>39) and for soil δ<sup>13</sup>C following exclusion of the 7 year old stand outlier (<i>N</i> = 12).</p
Pearson correlations among leaf trait variables.
<p>Data is the correlation value (<i>N</i>) and <i>P</i>-value expressed as *<0.1, **<0.05, ***<0.01, and ****<0.001.</p
Stand characteristics of all successional and primary (Pr) forest study sites (mean±std. dev.).
<p>*Crown Exposure (CE) index, **Diameter at Breast Height (1.3 m), ***Chao-Jaccard community composition similarity versus primary forest sites.</p
Percentage total living trees in understory and overstory crown exposure (CE) positions; 1–3, and 4–5, respectively.
<p>Stand development phases (top) correspond to those described by Waring and Running (2007) <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0086042#pone.0086042-Waring1" target="_blank">[24]</a> and Oliver and Larson (1990) <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0086042#pone.0086042-Oliver1" target="_blank">[25]</a>.</p
Foliar-minus-soil δ<sup>15</sup>N and δ<sup>13</sup>C values versus stand age and species successional status.
<p>Significant linear regressions are shown in grey.</p