SREL Reprint #3695

Grass(stage)root movement to ensure future resilience of longleaf pine ecosystems

Doug P. Aubrey

Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA 30602, USA
Savannah River Ecology Laboratory, University of Georgia, PO Drawer E, Aiken, SC 29802, USA

Abstract: Recent interest in restoring longleaf pine ecosystems highlights the need for an improved understanding, appreciation, and consideration of longleaf pine’s unique life history compared to other southern pines. Longleaf pine ecosystems are considered more resilient than other southern pine ecosystems and the attributes that confer this resilience may be related to belowground carbon allocation patterns that occur during the seedling stage of its life history where it exists for years in a grass stage. The long residence time spent in the grass stage has impeded adoption of longleaf pine by landowners for decades, which has resulted in efforts to expedite emergence from the grass stage through silviculture, nursery production, and selection breeding techniques; however, expedited emergence may come at the expense of root and belowground carbohydrate storage reserve development—traits that purportedly enhance longleaf pine tree and ecosystem resilience relative to other southern pine species. Here, I caution that efforts to expedite longleaf pine emergence from the grass stage also consider the potential implications on belowground carbon allocation and identify research priorities to help facilitate the improvement of longleaf pine seedling silviculture, nursery production, and breeding in a way that ensures the maintenance of attributes linked to resilience.

Keywords: Above- and belowground allocation; Carbohydrate storage reserves; Improved seedlings; Life history; Silviculture

SREL Reprint #3695

Aubrey, D. P. 2022. Grass(stage)root movement to ensure future resilience of longleaf pine ecosystems. New Forests 53(6): 971-982.

This information was provided by the University of Georgia's Savannah River Ecology Laboratory (srel.uga.edu).