Simard Et Al

Multiple Choice

Simard et al.(1997) further hypothesized that if reciprocal transfer did occur,it would be a source-sink relationship driven by photosynthetic rates.That is,if one seedling is in full sun and the other in deep shade,there will be a net movement of carbon from the seedling in full sun to the one in deep shade.If a shade was placed over the birch seedlings and the cedar,and the Douglas fir was left in full sun,what result could Simard and colleagues expect?

A) More ¹³C would be found in the birch than in the Douglas fir.
B) More ¹³C would be found in the Douglas fir than the birch.
C) The most ¹³C would be found in the cedar.
D) The most ¹⁴C would be found in the cedar.