Reference no: EM132526103

QUESTION Using tree cores you measure the annual growth rings of fir trees in the Sierras at high and low elevation; you also note whether an individual of another species (pines) is close to the fir tree you are measuring or not. The data you collect in the graphs below suggest that...

a.) pine trees outcompete fir trees at high elevation.

b.) fir trees facilitate pine trees at high elevation.

c.) the strength of facilitation increases with increasing environmental stress.

d.) pine and fir trees interact mutualistically.

e.) the rainshadow effect causes growth rates of fir trees to increase with elevation.