Plot of salmonfly emergence on the Madison

By year across our two Madison River sites, Hebgen and Varney Bridge:

## `geom_smooth()` using formula = 'y ~ x'

## Saving 8 x 5 in image
## `geom_smooth()` using formula = 'y ~ x'

Statistical Analysis

Results for our linear regressions:

HEBGEN -

lmHebgen = lm(sumExuvia ~ year, data = sum_byyear_hebgen)
summary(lmHebgen)
## 
## Call:
## lm(formula = sumExuvia ~ year, data = sum_byyear_hebgen)
## 
## Residuals:
##       1       2       3       4       5       6       7 
##  -15.47 -340.90 -122.74 1407.41 -212.01 -674.43  -41.86 
## 
## Coefficients:
##               Estimate Std. Error t value Pr(>|t|)
## (Intercept) -100351.65  196202.55  -0.511    0.631
## year             50.42      97.12   0.519    0.626
## 
## Residual standard error: 723 on 5 degrees of freedom
## Multiple R-squared:  0.05116,    Adjusted R-squared:  -0.1386 
## F-statistic: 0.2696 on 1 and 5 DF,  p-value: 0.6258

VARNEY -

lmVarney = lm(sumExuvia ~ year, data = sum_byyear_varney)
summary(lmVarney)
## 
## Call:
## lm(formula = sumExuvia ~ year, data = sum_byyear_varney)
## 
## Residuals:
##        1        2        3        4        5        6        7 
##  202.227  -39.593 -248.232    9.129  -31.691  -63.510  171.670 
## 
## Coefficients:
##             Estimate Std. Error t value Pr(>|t|)
## (Intercept) 83935.48   45191.75   1.857    0.122
## year          -41.18      22.37  -1.841    0.125
## 
## Residual standard error: 166.5 on 5 degrees of freedom
## Multiple R-squared:  0.404,  Adjusted R-squared:  0.2848 
## F-statistic: 3.389 on 1 and 5 DF,  p-value: 0.125