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- Title
Fire History and Stand Structure of High Quality Black Oak (Quercus velutina) Sand Savannas.
- Authors
Considine, Cody D.; Groninger, John W.; Ruffner, Charles M.; Therrell, Matthew D.; Baer, Sara G.
- Abstract
We surveyed high quality, remnant black oak sand savannas across four sites in northeastern Illinois to compare characteristics of stand structure and tree vigor with fire history. Dendrochronological methods were applied to 289 dated fire scars identified on 60 Quercus velutina trees. Stand structure was characterized using 30 circular plots (0.04 ha each) per stand during summer 2007. Tree recruitment dynamics differed among the four stands, suggesting that canopy decline dynamics among them is likely to differ in coming decades. Frequent fire intervals (less than two years) were associated with canopy openness, but also a paucity of future canopy trees. Under these frequent fire regimes, we predict a loss of canopy cover, as no smaller trees were present to assume dominance. Fire intervals longer than two years were associated with transition to closed canopy forests. These results suggest that savanna managers should consider other disturbances, such as selective cutting and or grazing, along with fire to sustain both herbaceous and canopy tree components.
- Subjects
ILLINOIS; FOREST fires; QUERCUS velutina; SAVANNAS; COMPARATIVE studies; DENDROCHRONOLOGY; NATURE reserves
- Publication
Natural Areas Journal, 2013, Vol 33, Issue 1, p10
- ISSN
0885-8608
- Publication type
Article
- DOI
10.3375/043.033.0102