Node connection strength in FlyTree.
Each node in FlyTree 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

959-
767-
575-
384-
192-

4 5 6 7 8 9 10 11 12 13 14+
Mean distance
 Number of nodes 



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

Rank Mean dist Name Institution Area Date
1 4.33 David S. Hogness (Info) Stanford University genetic regulation 2006-09-18
2 4.55 Gerald M. Rubin (Info) HHMI, UC Berkeley structure, function of fly genome 2006-09-24
3 4.98 Michael Levine (Info) University of California, Berkeley developmental patterning, segmentation 2008-04-17
4 4.99 Michael Ashburner (Info) University of Cambridge genome organization and evolution 2008-04-17
5 5.08 Eric F. Wieschaus (Info) Princeton University embryonic development 2008-04-17
6 5.13 Greg Gibson (Info) Georgia Institute of Technology Evolutionary Genomics 2008-05-23
7 5.18 Herschel K. Mitchell (Info) California Institute of Technology 2008-04-17
8 5.25 Mary Bownes (Info) University of Edinburgh 2008-04-17
9 5.25 Thomas Hunt Morgan (Info) California Institute of Technology Fruit Flies 2005-02-05
10 5.28 Michael L. Goldberg (Info) Cornell University 2008-08-18
11 5.28 Renato Paro (Info) 2008-04-17
12 5.28 Kenneth C. Burtis (Info) University of California, Davis sex determination, DNA repair 2008-04-17
13 5.33 Bob Karp (Info) 2008-04-17
14 5.33 Kenneth D. Irvine (Info) Rutgers University, New Brunswick Cell-signaling, growth control, cancer, morphogenesis, mechanotransduction 2008-04-17
15 5.34 Michael Akam (Info) 2008-04-17
16 5.35 Kevin Moses (Info) 2008-04-17
17 5.36 Dan Garza (Info) 2008-04-17
18 5.37 Mark Krasnow (Info) Stanford University molecular, genetic, and cellular mechanisms of tracheal development 2008-06-12
19 5.38 John T. Lis (Info) Cornell University transcription and processing of mRNAs 2008-04-17
20 5.39 Allan Spradling (Info) Carnegie Institution of Washington Developmental Biology, Genetics 2008-04-17


Distribution of individual connectivity.
Another way to look at the FlyTree 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 139 connections. Thanks to Adam Snyder for suggesting this analysis!

Edge vs node distribution

2680-
2144-
1608-
1072-
536-

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16+
Number of connections
 Node count