Fine root biomass within experimental canopy gaps: evidence for a below‐ground gap

Abstract

AbstractTo study fine root biomass in response to canopy gap formation, we determined fine root biomass in the upper 15 cm of soil within four experimental canopy gaps, and within the surrounding intact forest. Sampling was conducted throughout the growing season (May through August) following gap creation. We observed a mid‐season decrease in root biomass within gaps, and within the intact forest surrounding the gaps during June and July. Later in the season, less fine root biomass was found within canopy gaps than within the intact forest, and this trend may be attributed to root death accompanying the tree(s) that were felled to form the gaps. These results provide strong evidence for the formation of a below‐ground gap in association with the creation of a canopy gap.