Question

the rainwater that flows down a trees trunk, called stemflow, plays a vital role in carrying nutrients to the soil at the base of the tree. ecologists delphis levia jr. and brian frost conducted a comprehensive research in order to identify where the ecological role of stemflow is not fully understood. their review revealed a general consensus on many factors that affect stemflow chemistry, including tree canopy structure and weather conditions, but also exposed knowledge gaps; for instance, they noted that relatively little is known about stemflow composition and nutrient cycling in vegetation growing in forest understories. what does the text most strongly suggest is an outcome levia jr. and frost hope to achieve with their review? a ecologists shift attention from factors that may turn out to have little effect on stemflow to factors known to have a strong effect. b ongoing stemflow studies begin to broaden from what has been an overly narrow focus on quantifying the enrichment of soil. c there is greater public recognition that tree canopy structure and weather conditions are the factors that most significantly influence the chemistry of stemflow. d future research is guided by an awareness of what is already well understood about stemflow and what has yet to be adequately addressed.

Explanation:

The text mentions that ecologists Delphis Levia Jr. and Frost conducted a comprehensive research review on stemflow. They noted that while general consensus exists on many factors affecting stemflow, there is relatively little known about stemflow composition and nutrient cycling in forest understories. Their review revealed gaps in knowledge such as the influence of tree - canopy structure and weather on stemflow chemistry. Future research is guided by an awareness of what is already well - understood and what remains to be adequately explored.

Answer:

D. Future research is guided by an awareness of what is already well understood about stemflow and what has yet to be adequately addressed.