They're simply reporting that conditions of high temperature and drought reduce photosynthetic fixation rates more than they do total respiration rates (and fir

They're simply reporting that conditions of high temperature and drought reduce photosynthetic fixation rates more than they do total respiration rates (and fire losses). What's significant about the research is that they actually quantify these rates using a network of hundreds of carefully monitored forest plots across the region, it's not based on a computer model. Overall they report that the tropical forest across this region became carbon-neutral, i.e. no more carbon was taken up than was released. Looks like careful rigorous science to me.