3/4/22 - Looking back

In early 2017, at the start of the statewide Survey, MaLisa had a blog entry that highlighted counties that were low on observations and species recorded (https://u.osu.edu/ohioodonatasurvey/2017/05/). Her criteria were counties with fewer than 300 observations and counties with fewer than 40 species recorded. Five years later, I'm happy to report that we no longer have -any- counties below those threshholds.

Updating MaLisa's maps (created in R using packages ggmap, mapdata, and dplyr by MaLisa Spring) look like this: Originals on the left (blue = less than original threshhold), Updates for 2022 to original criteria on the right.

Here is the original 2017 observations map (left) and the 2022 update (right). Blue counties had fewer than 300 observations. Now all gray!

Here is the original 2017 species map (left) and the 2022 update (right). Blue counties had fewer than 40 species. Now all gray!

You can see that we passed all the original thresholds. In fact, we can double the observation requirement (+300) and increase the species by 50% (+20) to have similar county lists.

Ohio Counties color coded for Observations. Blue counties are currently in the range of 324-594 observations (<600). Gray counties have observations in the range of 605-9,340.

Ohio Counties color coded for Species. Blue counties are currently in the range of 50-59 species (< 60). Gray counties have species in the range of 60-117.

Posted on 04 de março de 2022, 06:39 PM by jimlem