Network Analysis Ecopath - Keystoneness

[Miriam Püts]

Hi everyone,

I tried to run the network analysis today to get keystoneness for my model. However, after 30 minutes, a window pops up and says: Network Analysis timed out and results will not be displayed. Is there a maximum nuber of functional groups this works with or is there a way around it?

Best,

Miriam

[EwE user support]

Hi Miriam,

ENA has an exponentially hard time with feeding cycles. The (in)famous 2007 North Sea model could spend 2 days (!) on a single ENA pathways assessment.

You can change the time-out period on ENA, but ideally, we should put time into trying to separate the Keystoneness calculations from the paths and cycles assessment. But that may be a serious coding challenge for which we do not have time right now...

And even better: ENA should be recoded according to modern gaming technologies; I am convinced that the code does not need to follow every path through but that instead this could be dramatically optimized with modern programming paradigms. However, this is PhD-thesis level stuff and requires serious time and dedication.

Try to change the time-out in ENA options, please

Best,
Jeroen

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