In forest ecology, it is well established that trees interact via underground mycorrhizal networks, sharing carbon, water, and nutrients. While early research focused heavily on how these networks facilitate cooperative resource sharing, especially between parent trees and their offspring, recent studies suggest a more competitive dynamic. For instance, ecologist Dr. Elena Vance demonstrated that mature Douglas firs frequently restrict nutrient transport to neighboring seedlings of other species during periods of drought. This finding has led researchers to re-examine the assumption that mycorrhizal networks function primarily as cooperative systems. Instead, these networks may serve as conduits for resource hoarding and species competition, shaping forest composition in ways that are far more complex than previously believed.
Which choice best describes the function of the underlined sentence in the text as a whole?
- AIt outlines the primary conclusion of the entire passage regarding how forest composition is shaped by resource distribution.
- It provides a specific example of tree behavior to illustrate the competitive interactions introduced in the preceding sentence.Cevap
- CIt claims that mature Douglas firs are the only tree species capable of restricting nutrients during periods of drought.
- DIt predicts that mycorrhizal networks will completely fail to transport resources if global drought conditions continue to worsen.