Map of lake TN, TP, and TN:TP by Sarah Collins

This map is from this article by Sarah Collins et al. It clearly shows how spatial patterns in TP and TN alone do not lead to similar patterns in the ratio of TN:TP.  Also, spatial pattern in TN and TP are similar, but not identical and there are some interesting outliers, e.g., Michigan lakes.  SeeContinue reading “Map of lake TN, TP, and TN:TP by Sarah Collins”

The freshwater landscape. By Emi Fergus

Emi Fergus et al. published a recent paper that describes the complex features of the freshwater landscape. These maps are very compelling in that they show that there are very different patterns between freshwater ABUNDANCE versus CONNECTIVITY. FIGURE DESCRIPTION (Figure and text from Fergus et al. 2017): Freshwater abundance and connectivity maps by system type.Continue reading “The freshwater landscape. By Emi Fergus”

Change in lake chlorophyll distribution in thousands of US lakes through time by Sam Oliver

This figure shows the distribution of the underlying data in Oliver et al 2017 (see below). Interestingly, when you look at all data, it is difficult to discern any patterns. While the study found that on average lakes weren’t changing in chlorophyll, roughly 15% of lakes were either increasing or decreasing in chlorophyll. Samantha OliverContinue reading “Change in lake chlorophyll distribution in thousands of US lakes through time by Sam Oliver”

TP vs CHL Gif by Sam Oliver

This GIF is interesting because it shows how a very well-known limnological relationship (total phosphorus versus chlorophyll concentration) changes at the annual scale across about 20 years. There are plenty of lakes that seem to track that rough 1:1 line, but quite a few that do not and do quite interesting things. The lakes thatContinue reading “TP vs CHL Gif by Sam Oliver”