Food webs visualization

These are food webs from a number of USA lakes. It shows the trophic interactions between species in those lakes ecosystems. After finding cola.js I wanted to make a network visualization, I searched for network data, found this and developed this visualization.

I’ve converted the pajek datasets found at this web site to json and visualized it with D3.js and cola.js.

The data format conversion was done with python:

Check the demo below or at

Use the top right select box to select a lake. Interact with the visualization by scrolling to zoom, dragging to move, hover nodes in order to show their details and double click nodes in order to remove them from the network chart and make things easier to visualize. Double click again to reintegrate a node.