The frequent relatively low intensity fires that burned in these forests undoubtedly killed many small understory Jeffrey pine stems but thick-barked larger individuals survived repeated fires.
(The frequent relatively low intensity fires; burned; L:in these forests) (The frequent relatively low intensity fires that burned in these forests; undoubtedly killed; many small understory Jeffrey pine stems) (thick-barked larger individuals; survived; repeated fires)
The frequent relatively low intensity fires The frequent relatively low intensity fires that burned in these forests thick-barked larger individuals
burned undoubtedly killed survived
L:in these forests
many small understory Jeffrey pine stems
repeated fires