The "keen lung-shrivelling aroma" of snow gives off a tint of blue: "The dense thickets and brakes were purple-black... the mystery of the trees was increased".
Mortality of stressed boreal trees is increased due to insect infestation and subsequent fire.
In 2005, it had established itself in many areas, and the frequency at the examined trees was increased significantly.
By 2010, forb cover and the combined cover of dead shrubs and trees were increased and decreased, respectively, by chaining in the BLM experiment.
In the pine population, the factor (1-u_{1}) is involved to reduce the associated force of infection, and the exploitation rate of infected pine trees is increased at a rate (u_{2}).
Minor changes to improve the analyses respect to that paper were as follows: 1) for MP, the maximum number of tied trees was increased from 20 to 100 and the tree-bisection-reconnection algorithm, which is more exhaustive and precise than the subtree pruning-regrafting method used in [11], was chosen.
Retuerto et al. [ 17] reported that PSII (indicated by Fv/Fm) in galled leaves on holly trees was increased compared to gall-free leaves, and predicted that scale insects would increase photosynthesis.
Over the past several decades, these have shown that the density of trees is increasing as more carbon is used up.
The forest physiognomy (forest type) of the experimental plot was a man-made (artificial) forest primarily comprising approximately 80-year-old larch trees (Larix kaempferi); however, the amount of hardwood trees was increasing, and the forest was turning into a mixed-type forest.
Notably, the average seed set number per tree was increased by approximately 177% at the end of the observation period when sterilized soil was used.
