Neighborhood Effects on Juveniles in an Old-Growth Stand of Longleaf Pine, Pinus palustris

Genetic diversity of allozymes at 24 loci was studied in 23 populations of longleaf pine (Pinus palustris Mill.), including three seed orchard populations and an old-growth stand. Overall, the mean number of alleles per polymorphic locus was 2.9, the percentage of polymorphic loci was 92%, and the mean expected heterozygosity was 0.105. These values are comparable with diversity measures found in a similar loblolly pine (Pinus taedaL.) study. Diversity measures of the seed orchard sources and the old-growth stand were similar to those in the other natural seed sources. F statistics indicate very little inbreeding overall (FIS = -0.002) and low differentiation among populations (FST = 0.041). All measures of genetic diversity were significantly related to longitude; western sources tended to have more allozyme diversity. Since growth or survival are not related to longitude, and no important climatic variables are related to longitude within the natural range of longleaf, it is proposed that the east-west variation in longleaf pine is a result of migration from a single refugium in the west (south Texas or northeastern Mexico) after the Pleistocene.

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Effects of site preparation treatments on early growth and survival of planted longleaf pine (Pinus palustris Mill.) seedlings in North Carolina

Forest Ecology and Management ◽

10.1016/j.foreco.2006.01.029 ◽

2006 ◽

Vol 226 (1-3) ◽

pp. 122-128 ◽

Cited By ~ 24

Author(s):

Benjamin O. Knapp ◽

G. Geoff Wang ◽

Joan L. Walker ◽

Susan Cohen

Keyword(s):

North Carolina ◽

Longleaf Pine ◽

Pinus Palustris ◽

Early Growth ◽

Site Preparation ◽

Growth And Survival

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Fire in the Suburbs: Ecological Impacts of Prescribed Fire in Small Remnants of Longleaf Pine (Pinus palustris) Sandhill

Restoration Ecology ◽

10.1046/j.1526-100x.2003.09982.x ◽

2003 ◽

Vol 11 (1) ◽

pp. 72-81 ◽

Cited By ~ 23

Author(s):

Kimberly A. Heuberger ◽

Francis E. Putz

Keyword(s):

Prescribed Fire ◽

Longleaf Pine ◽

Pinus Palustris ◽

Ecological Impacts

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Longleaf Pine (Pinus palustris Mill.) Branch Pruning by Prescribed Fire

Forest Science ◽

10.1093/forsci/fxab018 ◽

2021 ◽

Author(s):

John P McGuire ◽

John S Kush ◽

J Morgan Varner ◽

Dwight K Lauer ◽

J Ryan Mitchell

Keyword(s):

Prescribed Fire ◽

Longleaf Pine ◽

Wood Quality ◽

Pinus Palustris ◽

Planting Density ◽

Prescribed Fires ◽

Pine Tree ◽

Southeastern Us ◽

Tree Survival ◽

The Impact

Abstract Efforts to restore longleaf pine (Pinus palustris Mill.) in the southeastern US require substantial artificial regeneration. Once established, important questions remain about when to introduce fire. We investigated the impact of initial planting density on tree branching and how prescribed fire might interact with tree architecture and survival. A particular focus was on how prescribed fires could “prune” lower branches. Lower density plantings (897 trees ha−1) had more and larger live lower branches than higher density plantings (2,243 trees ha−1). Fire was effective in pruning lower branches regardless of season burned, but fire in the growing season was more effective at pruning. Branches up to a height of 1.5 to 2 m were killed by fire. Fire applied in August caused greater damage with more needles scorched and/or consumed and more stem char. Prescribed fire did not impact longleaf pine tree survival. In general, fire applied to longleaf pine facilitated pruning lower branches that affect long-term wood quality, an additional argument for its utility in restoration and management of these ecosystems.

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