During succession at Glacier Bay, Dryas and alders carry out nitrogen fixation, helping spruce trees become established.Established spruce trees then compete for nutrients and light with other tree species, hindering them from becoming established.Should these two interactions be categorized as facilitation or inhibition?

Question

Quizplus · Accepted Answer

Nitrogen fixation is an example of facilitation as it is helping the establishment of spruce trees. On the other hand, spruce tree competition with other species is an example of inhibition as it is hindering the establishment of other tree species. Thus, both interactions cannot be categorized under the same label, and the correct option is D.

During Succession at Glacier Bay, Dryas and Alders Carry Out