18 October 2018

Looking at alphaRstar.runs_alpha.rstar2p.pdf....

All species that survive after stationary period do have a fundamental trade-off between alpha and R*

Considering who wins in 1 species exists after non-stat period: For the small wedges where sp1 or sp2 consistently wins, tracking advantage predicts whether sp1 or sp2 wins (those are cases where the tracking advantage is greater than the R* advantage) ... what about the rest of the cases? It could be cases where which one wins depends on initial conditions. So one that wins depends on higher Bfin to start.

Looking at taualpha.runs_alpha.tauIP2p.pdf...

Need to make more plots

12 October 2018

Why does coexistence space compress this with directional environmental change? ... Species have been filtered by current environment we are left with a set of species where R* and tracking trade-off .... then we directionally shift to a new environment ... so more FILTERING on top of filtering.

In stationary period: we created space for stabilizing mechanisms .... as we directionally shift we lose stabilizing mechanisms, you're left with equalizing mechanisms.

Instead of thinking of alpha and R* as two competitive axes; what if we think of alpha as temporal niche axis and R* as competitive dominance axis? So as you move away a 1:1 alpha species spread out in temporal niche space, so in time they are competing more with themselves (intraspecific) than with other species (interspecific) so you can get more competitive differences between species.

So in stationary, species only overlap so much. But in future, one species goes along with tauP and the species that was the competitive dominant has fewer and fewer good years. So what you're left with is species pairs that are super similar and thus taking a long time to go extinct.

At next meeting (24 September 2018 1pm PDT)

1. Go through what runs we have and need for phen tracking paper 1a. We should add the varying tauP and varying R0 runs soon?
2. Go through figures, do we understand them all? Do we need more?
3. Next steps on runs/figures
4. Review megadroughts progress

Some figure questions from Lizzie:

1. Work on my understanding of narrowing of parameter space with non-stationarity
2. Why is best tauI bimodal? --> TWO IDEAS: (idea 1) If tauI==tauP it drives the other species extinct (idea 2) If tauI==tauP then maybe that species uses up its seedbank