Table 4
Functional data analysis of bioassessment metrics through time. Hester–Dendy samples were collected at all sites from 1997 to 2014. Hess samples were also collected from 2010 to 2014 and analyzed with Hester–Dendy data from 1997 to 2009. Slope, standard error (SE), and a 95% confidence interval (CI) are reported for each metric and site. Year was the independent variable in all analyses. The relationship was significant (bold) when the CI did not include zero. Abbreviations: Ranch = Agate Springs Ranch, Middle = Agate Middle, East = Agate East, and HBI = Hilsenhoff's biotic index.
| Hester–Dendy | Hess | |||||
|---|---|---|---|---|---|---|
| Slope | SE | CI | Slope | SE | CI | |
| HBI | ||||||
| Ranch | 0.066 | 0.053 | 0.158 | 0.045 | ||
| Middle | 0.214 | 0.052 | 0.209 | 0.052 | ||
| East | 0.113 | 0.057 | 0.184 | 0.042 | ||
| Mean | 0.131 | 0.054 | 0.023 to 0.238 | 0.182 | 0.046 | 0.091 to 0.276 |
| Diversity | ||||||
| Ranch | 0.017 | 0.013 | 0.009 | 0.009 | ||
| Middle | 0.018 | 0.011 | 0.044 | 0.013 | ||
| East | 0.006 | 0.010 | 0.023 | 0.018 | ||
| Mean | 0.014 | 0.012 | −0.009 to 0.037 | 0.025 | 0.013 | −0.001 to 0.052 |
| Richness | ||||||
| Ranch | 0.125 | 0.106 | 0.264 | 0.120 | ||
| Middle | 0.269 | 0.145 | 0.565 | 0.256 | ||
| East | 0.454 | 0.169 | 1.095 | 0.372 | ||
| Mean | 0.283 | 0.140 | 0.003 to 0.563 | 0.641 | 0.249 | 0.142 to 1.140 |
| Evenness | ||||||
| Ranch | 0.006 | 0.004 | 0.000 | 0.004 | ||
| Middle | 0.005 | 0.005 | 0.014 | 0.004 | ||
| East | 0.001 | 0.003 | 0.000 | 0.005 | ||
| Mean | 0.004 | 0.004 | −0.004 to 0.012 | 0.005 | 0.004 | −0.004 to 0.013 |
| EPT | ||||||
| Ranch | −0.084 | 0.042 | −0.147 | 0.039 | ||
| Middle | −0.272 | 0.046 | −0.249 | 0.052 | ||
| East | −0.034 | 0.078 | −0.034 | 0.078 | ||
| Mean | −0.130 | 0.055 | −0.241 to −0.019 | −0.143 | 0.056 | −0.255 to −0.027 |
| Proportion EPT | ||||||
| Ranch | −0.013 | 0.005 | −0.021 | 0.006 | ||
| Middle | −0.296 | 0.004 | −0.031 | 0.005 | ||
| East | −0.018 | 0.007 | −0.024 | 0.006 | ||
| Mean | −0.109 | 0.005 | −0.120 to −0.099 | −0.025 | 0.005 | −0.036 to −0.015 |
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