Node connection strength in Plant Biology Tree.
Each node in Plant Biology Tree 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 6 7 8 10 11 12 13 14 15 16 17 18 19 20+
Mean distance
 Number of nodes 

20 most tightly coupled nodes.
Below are the Plant Biology Tree nodes with shortest mean distance.

Rank Mean dist Name Institution Area Date
1 5.41 Elliot M Meyerowitz (Info) California Institute of Technology Biological Engineering, Developmental Biology, Genetics, Systems Biology, plant biology 2008-04-17
2 6.57 Marcus Morton Rhoades (Info) Indiana University, Bloomington genetics 2008-04-17
3 8.25 Robert B. Goldberg (Info) University of California, Los Angeles Plant Biology 2008-07-28
4 8.43 M. Kathryn Barton (Info) Carnegie Institute Plant development 2013-07-09
5 8.88 Joseph R. Ecker (Info) HHMI-The Salk Institute for Biological Studies epigenetics, molecular genetics 2014-06-27
6 9.64 Elizabeth S. Haswell (Info) Washington University, Saint Louis signal transduction, transcriptional regulation 2015-11-23
7 10.18 Sharon R. Long (Info) Stanford University molecular biology, biochemistry and genetics to study the symbiosis of Rhizobium bacteria and plant hosts 2013-07-25
8 10.37 Obdulia Baltazar Bernal (Info) Cornell University horticulture 2015-11-07
9 10.37 Chad T. Miller (Info) Kansas State University horticulture 2015-11-07
10 10.37 Christopher B. Cerveny (Info) Cornell University horticulture 2015-11-07
11 10.37 Susan S. Liou (Info) Cornell University horticulture 2015-11-07
12 10.37 Garry Legnani (Info) Cornell University horticulture 2015-11-07
13 10.37 Yao-Chien Chang (Info) Cornell University horticulture 2015-11-07
14 10.71 Karl Sax (Info) Harvard University cytology and genetics, focusing on chromosomal studies and their application to cross breeding of agricultural varieties, Chromosome aberrations induced by X-rays 2012-03-23
15 10.78 David Christopher Nelson (Info) University of California, Riverside Arabidopsis, germination, karrikins, strigolactones, signaling 2016-01-04
16 13.56 Marcus A. Samuel (Info) University of British Columbia, Vancouver plant tissue culture, plant biochemistry, plant molecular biology, enzymology and genetic engineering. 2015-10-05
17 19.8 Benjamin J. Cole (Info) University of California, San Diego Circadian Rhythms, Systems Biology 2015-09-29
18 21.4 Laurie G. Smith (Info) University of California, San Diego Actin Cytoskeleton, Cell Morphogenesis 2008-04-26
19 11375.1 Jian Hua (Info) Cornell University molecular genetic mechanisms of environmental responses in plants 2016-02-05

Distribution of individual connectivity.
Another way to look at the Plant Biology Tree 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 102 connections. Thanks to Adam Snyder for suggesting this analysis!

Edge vs node distribution


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