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Node connection strength in Envirotree.
Each node in Envirotree can be characterized by its mean distance from every other node. Below is a histogram of mean distances for every node in the tree. The final bin includes nodes that are not connected to the main tree. Note also that only individuals whose primary affiliation is this tree are included. Nodes cross-listed from other academic trees are included on their primary tree.

Mean inter-node distance
5-
4-
3-
2-
1-
12 13 14 15 16 17 18+
Mean distance
 Number of nodes 



20 most tightly coupled nodes.
Below are the Envirotree nodes with shortest mean distance.

Rank Mean dist Name Institution Area Date
1 11.87 Kartik Chandran (Info) Columbia University 2015-07-10
2 18.67 Jesse O. Bash (Info) University of Connecticut Animal Behavior 2015-09-26
3 18.67 April L. Hiscox (Info) University of South Carolina Micrometeorology 2015-09-26
4 7962.6 Joseph B. Hughes (Info) Georgia Institute of Technology Environmental Engineering, Biogeochemistry, Biochemistry 2016-02-05
5 30533.1 Karine Markewitz (Info) Université de Sherbrooke Civil Engineering, Environmental Sciences, Environmental Engineering 2016-05-30
6 30533.1 Abderrahim Lakhouit (Info) Université de Sherbrooke Civil Engineering, Environmental Engineering 2016-05-30


Distribution of individual connectivity.
Another way to look at the Envirotree graph is to plot a histogram of researchers (nodes) based according to the number of immediate connections (edges) they have to other researchers. The final bin includes nodes with 16 or more connections. The actual distribution has a very long tail, with a maximum of 34 connections. Thanks to Adam Snyder for suggesting this analysis!

Edge vs node distribution
582-
466-
349-
233-
116-
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16+
Number of connections
 Node count