13 research outputs found
Bi-plot of redundancy analysis of bacterial community composition.
<p>Color key denotes different lakes, and arrows denote biplot scores for the constraining variables. The grey box encompasses 17 samples that fall within a narrow range of each other and are not visually distinguishable on the bi-plot; this includes 1β2 samples from every lake except Middle Sunrise and Upper Cathedral Lake. One sample from Middle Sunrise Lake with extremely high AOB <i>amoA</i> gene abundance is not shown, as it falls much farther along the RDA1 and RDA2 axes.</p
Lake elevation plotted against longitude for the nine lakes sampled in this study.
<p>Lake elevation plotted against longitude for the nine lakes sampled in this study.</p
Sampling locations (white circles) in Yosemite National Park displayed on 10 m resolution elevation data from the United States Geological Survey National Elevation Dataset (http://nationalmap.gov/).
<p>Inset: location of Yosemite shown as the green shaded area within the state of California.</p
Variation in lake nutrient concentrations versus elevation for (A) phosphate (PO<sub>4</sub><sup>3-</sup>), (B) ammonium (NH<sub>4</sub><sup>+</sup>), (C) nitrite (NO<sub>2</sub><sup>-</sup>), and (D) nitrate (NO<sub>3</sub><sup>-</sup>).
<p>Vertical axes show nutrient concentrations in nanomolar (nM) plotted on a logarithmic scale, and colors denote month of sampling. Note that some samples have highly similar nutrient concentrations and fall nearly on top of one another.</p
Boxplot comparison of number of <i>amoA</i> genes per milliliter (genes mL<sup>β1</sup>) for (A) ammonia-oxidizing archaea (AOA) and (B) ammonia-oxidizing bacteria (AOB).
<p>The vertical axes (logarithimic scale) denote the number of genes mL<sup>β1</sup>; the horizontal axes represent the elevation of the sampling sites, and are ordered from lowest elevation (Harden Lake) to highest elevation (Upper Gaylor Lake). In these plots, the box denotes the mean plus and minus one standard deviation; the line within the box represents the median value; and lines extending above and below the box span the full range of the data. Outliers were defined as sample values 1.5 times larger than the upper quartile and are represented by green and blue circles.</p
Boxplot comparison of calculated <sup>15</sup>NH<sub>4</sub><sup>+</sup> oxidation rates measured in Lower Cathedral and Lower Gaylor lakes.
<p>The vertical axis shows <sup>15</sup>NH <sup>+</sup> oxidation rates (pmol L<sup>β1</sup> D<sup>β1</sup>). The blue bars represent dark bottle incubations that were incubated under zero-light conditions, while the orange bars represent samples that were exposed to ambient light over a 24-hour cycle during in-situ incubation at the sampling site. The dashed line notes the detection limit. In these plots, the box denotes the mean plus and minus one standard deviation; the line within the box represents the median value; and lines extending above and below the box span the full range of the data.</p
Lake names, elevation, depth, and average nutrient concentrations.
<p>Lake names, elevation, depth, and average nutrient concentrations.</p
r values for relationships among environmental datasets in different regions of the Pacific.
<p>r values for relationships among environmental datasets in different regions of the Pacific.</p
r<sup>2</sup> for comparisons among different AOU approaches to calculating CR for the California to Australia (above the diagonal) and California to Japan (below the diagonal datasets).
<p>P<0.001 in all instances.</p
Regression statistics for best AIC derived relationships between AOU-slope-based CR2 data and environmental data.
<p>Bar graphs show regression r<sup>2</sup> values for univariate linear regression, multiple linear regression, and multiple linear regression with interactions. Color-coded symbols next to the bar graphs indicate which variables or interactions yielded significant relationships; a white circle indicates that no significant relationships were found. These model statistics represent log-transformed turbidity and chlorophyll data.</p