Slow feedbacks have little effect on the immediate planetary energy balance, instead coming into play in response to temperature change. (journals.plos.org)
Note that the authors spend alot of time explaining why there is not always a positive response to temperature. (deepclimate.org)
Their analysis of wood density seem quite consistent with previous literature, which tends to find that density has a more stable response to temperature. (dotearth.blogs.nytimes.com)