Abstract
Landscapes are the resultant of ecological processes and events operating on many different space-time scales. Large scale disturbance is recognized as a major influence on landscape patterns, but the impact of small scale events is often overlooked. We develop an hierarchical framework to relate lightning and bark beetle population dynamics to the southern pine forest landscape using the concepts of disturbance propagation and amplification. The low level lightning disturbance can be propagated to the landscape level when weather and forest stand structure facilitate bark beetle epidemics. We identify epidemics as biotically-driven episodes that alter landscape structure. The concept of the landscape as the spatial dimension of these episodes is represented in a conceptual model linking insect-host and landscape mosaic interactions.
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Rykiel, E.J., Coulson, R.N., Sharpe, P.J.H. et al. Disturbance propagation by bark beetles as an episodic landscape phenomenon. Landscape Ecol 1, 129–139 (1988). https://doi.org/10.1007/BF00162739
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DOI: https://doi.org/10.1007/BF00162739