organizing all the drivers/hypotheses/factors or whatever we want to call them ...

[lizzieinvancouver]

I have been trying to organize the top factors that could affect GSL x growth relationships. Here's where I am so far:

Abiotic external drivers (see also issue #21):

1. Temperature (too high and too low)
2. Soil moisture (too little)
3. VPD
4. Other stuff we suggest is less important and thus toss under 'other' (CO2 etc.)

Biotic external drivers ... Herbivory, disease, competition... Do we have so much to say here? Do we think this is super important or is there any chance we can say it's not based on tree ring studies or some other literature? @rdmanzanedo mentioned insects etc. in his talk for his ERC so maybe he has thoughts? I personally tend to think of these as massively important over a short-time frame (outbreaks), but not sure how they integrate over bigger scales.

Endogenous effects (see also issue #20) ... 'internal drivers'? Other names?

1. Acquisitive to conservative plant strategies (lots of words for this, but basically some species are probably set up to exploit a longer season and some are not ... our indeterminate/determinate discussion goes here)
2. Trade-offs between reproduction and growth (related to above, but also about interannual variation with an individual)
3. Local adaptation (relates to 1 I think? Species that cannot adjust fast should locally adapt to seasonal length ... can we sneak in ref to Zohner hypotheses here?)
4. Evolutionary constraints (phylogeny)
5. Genetic and developmental constraints, I am stealing this term from The Evolution of Plant Ecophysiological Traits: Recent Advances and Future Directions: New research addresses natural selection, genetic constraints, and the adaptive evolution of plant ecophysiological traits ... I think many of the Zohner hypotheses are proposed by their authors to fit here, but we could argue this is not well tested.

1-4 all predict species differences and start to explain them, but I am not sure if this is the best list or complete enough.

Also, how we define stuff, but I think that's covered by Korner so we can breeze by it early in the ms.

[lizzieinvancouver]

I found some cool articles (thanks to Jonathan, and his masting project) that suggest high summer temperatures leading to less growth the NEXT year could be a masting relationship (whereas it seems much of the current lit would assume the temperatures were 'too high' or such -- assuming an external abiotic driver, when it may be an internal driver of the growth-repro trade-off).

"Consistent limitation of growth by high temperature and low precipitation from range core to southern edge of European beech indicates widespread vulnerability to changing climate"

https://link.springer.com/article/10.1007/s10342-016-0982-7

"Additionally, tree-rings from older trees contain particular growth–climate relationships that are rarely found in younger trees." ... " Additionally, the growth of older and larger trees was more frequently significantly correlated with previous summer temperature than younger and smaller trees."... "The finding that negative correlations between RWI and previous summer temperature were more frequently significant in sites with older and larger trees may support this masting-related mechanism. As older trees have been shown to increase investment in reproduction relative to growth (Genet et al. 2010), the effect of masting on tree growth may increase with tree age (Hacket-Pain et al. 2015b)."

[lizzieinvancouver]

For my biotic comment, I want something like 'Age, competition, disturbance and elevation effects on tree and stand growth response of primary Picea abies forest to climate' ... where they try to directly compare what factors matter.

[lizzieinvancouver]

Hmmm, Competition alters tree growth responses to climate at individual and stand scales could be relevant:

Individual growth was sensitive to climate under low but not high competition, likely because tree ability to increase growth under more favorable climates (generally greater energy availability) was constrained by competition, with important variation among species. Thus, climate change will likely increase individual growth most in uncrowded stands with lower competition

[lizzieinvancouver]

@AileneKane added:

genetic/developmental stuff COULD be evolutionarily constrained too as long as we're ok that the terms are not mutually exclusive, I like you're list.

[lizzieinvancouver]

@jannekehrl Says Zani and Zohner papers do not clarify developmental/genetic constraints so be sure to keep those terms together.

[alanaroseo]

[lizzieinvancouver]

Adding some info on 5 above: from `Genetic constraints on adaptation: a theoretical primer for the genomics era' --

Genetic constraints are features of inheritance systems that slow or prohibit adaptation

And from Maynard-Smith 1985 (`Developmental Constraints and Evolution: A Perspective from the Mountain Lake Conference on Development and Evolution'):

Developmental constraints (defined as biases on the production of variant phenotypes or limitations on phenotypic variability caused by the structure, character, composition, or dynamics of the developmental system) undoubtedly play a significant role in evolution.

And then separate is phylogenetic constraints.

[lizzieinvancouver]

I think this is set for now in the paper.