Data
Beta Diversity & Trout Abundance Table
Table.1 This data table contains the data used for the statistical analysis in this project. It does not not include all sampled streams as some were only sampled for aquatic invertebrates and some were only electro-fished.
Only streams that had an aquatic beta diversity value as well as trout present were used in this project.
Trout Abundance Boxplot
Figure.1 Boxplot of total abundance of trout as well as split into the three different species
Beta Diversity Boxplot
Figure.2 Boxplot of total beta diversity and its two components: replacement and nestedness
Component Proportions
Figure.3 Replacement makes up a much larger portion of beta diversity than nestedness does, as seen in this boxplot
*Note: Does not include Burnt Timber
Aquatic Invertebrate Beta Diversity & Trout Abundance Plots
Figure.4 This graph depicts the relationship between total beta diversity and total trout abundance in the 8 streams (Red trendline, Adjusted R² = 0.0044, Slope = 163.02, p-value = 0.3491) and 7 out of the 8 streams (Black trendline, Adjusted R² = 0.6171, Slope = 403.56, p-value = 0.0223)
*Red point represents Burn Timber
Bull Trout
Figure.5 This graph depicts the relationship between total beta diversity and Bull trout abundance in the 8 streams (Red trendline, Adjusted R² = -0.0911, p-value = 0.5429) and 7 out of the 8 streams (Black trendline, Adjusted R² = -0.1855, p-value = 0.8144)
*Red point represents Burn Timber
Brown Trout
Figure.6 This graph depicts the relationship between total beta diversity and Brown trout abundance in the 8 streams (Red trendline, Adjusted R² = -0.1543, p-value = 0.8081) and 7 out of the 8 streams (Black trendline, Adjusted R² = -0.0782, p-value = 0.4862)
*Red point represents Burn Timber
Brook Trout
Figure.7 This graph depicts the relationship between total beta diversity and Brook trout abundance in the 8 streams (Red trendline, Adjusted R² = -0.0967, p-value = 0.5588) and 7 out of the 8 streams (Black trendline, Adjusted R² = 0.2246, p-value = 0.1589)
*Red point represents Burn Timber
Aquatic Invertebrate Replacement & Trout Abundance Plots
Figure.8 This graph depicts the relationship between replacement and total trout abundance in the 8 streams (Red trendline, Adjusted R² = 0.0457, Slope = 166.70, p-value = 0.2918) and 7 out of the 8 streams (Black trendline, R² = 0.7743, Slope = 409.23, p-value = 0.0056)
*Red point represents Burn Timber
Bull Trout
Figure.9 This graph depicts the relationship between replacement and Bull trout abundance in the 8 streams (Red trendline, Adjusted R² = -0.0715, p-value = 0.4929) and 7 out of the 8 streams (Black trendline, Adjusted R² = -0.1739, p-value = 0.7526)
*Red point represents Burn Timber
Brown Trout
Figure.10 This graph depicts the relationship between replacement and Brown trout abundance in the 8 streams (Red trendline, Adjusted R² = -0.0715, p-value = 0.4928) and 7 out of the 8 streams (Black trendline, Adjusted R² = 0.1809, p-value = 0.1878)
*Red point represents Burn Timber
Brook Trout
Figure.11 This graph depicts the relationship between replacement and Brook trout abundance in the 8 streams (Red trendline, Adjusted R² = -0.157, p-value = 0.8305) and 7 out of the 8 streams (Black trendline, Adjusted R² = -0.0069, p-value = 0.3725)
*Red point represents Burn Timber
Aquatic Invertebrate Nestedness & Trout Abundance Plots
Figure.12 This graph depicts the relationship between nestedness and total trout abundance in the 8 streams (Red trendline, Adjusted R² = -0.0543, Slope = -500.45, p-value = 0.4545) and 7 out of the 8 streams (Black trendline, Adjusted R² = 0.0502, Slope = -702.71, p-value = 0.303)
*Red point represents Burn Timber
Bull Trout
Figure.13 This graph depicts the relationship between Nestedness and Bull trout abundance in the 8 streams (Red trendline, Adjusted R² = -0.1131, p-value = 0.6102) and 7 out of the 8 streams (Black trendline, Adjusted R² = -0.1718, p-value = 0.7429)
*Red point represents Burn Timber
Brown Trout
Figure.14 This graph depicts the relationship between Nestedness and Brown trout abundance in the 8 streams (Red trendline, Adjusted R² = 0.559, p-value = 0.0200) and 7 out of the 8 streams (Black trendline, Adjusted R² = 0.7861, p-value = 0.0049)
*Red point represents Burn Timber
Brook Trout
Figure.15 This graph depicts the relationship between Nestedness and Brook trout abundance in the 8 streams (Red trendline, Adjusted R² = 0.1898, p-value = 0.1554) and 7 out of the 8 streams (Black trendline, Adjusted R² = 0.1154, p-value = 0.2394)
*Red point represents Burn Timber
Aquatic Invertebrate Alpha Diversity
Both the Simpson as well as the Shannon-Wiener indices of diversity were calculated for the 8 streams. The higher the number, the greater the diversity of aquatic invertebrates
Simpson Index Table
Table.2
Shannon-Wiener Index table
Table.3
Simpson Index Boxplot
Figure.16 *Burnt Timber is the outlier
Shannon-Wiener Index Boxplot
Figure.17 *Burnt Timber is the outlier
Simpson Index & Trout Abundance
Figure.18 This graph depicts the relationship between Simpson Index alpha diversity and total trout abundance in the 8 streams (Red trendline, Adjusted R² = -0.1088, p-value = 0.5961) and 7 out of the 8 streams (Black trendline, Adjusted R² = -0.1329, p-value = 0.6096)
*Red point represents Burn Timber
Shannon-Wiener Index & Trout Abundance
Figure.19 This graph depicts the relationship between Shannon-Wiener Index alpha diversity and total trout abundance in the 8 streams (Red trendline, Adjusted R² = -0.0734, p-value = 0.4975) and 7 out of the 8 streams (Black trendline, Adjusted R² = -0.1628, p-value = 0.7058)
*Red point represents Burn Timber
Aquatic Invertebrate Abundance & Trout Abundance
Figure.20 This graph depicts the relationship between aquatic invertebrate abundance and total trout abundance in the 8 streams (Adjusted R² = -0.1667, p-value = 0.9988)
Limitations & Outliers
Burnt Timber is seemingly an outlier, both based on the beta diversity and replacement residual plots (Figure.4, Figure.8) as well as the alpha diversity boxplots (Figure.16, Figure.17). However, whether this is in fact an outlier and more sampling would result in a stronger correlation, or if its not an outlier and it simply seems that way due to low sampling levels cannot be determined with the data available.