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- W1477957850 abstract "The southern pine beetle, Dendroctonus frontalis ZIMMERMANN, has done considerable damage to southeastern United States pines in the last 23 years of recorded information. During this interval the insect has undergone tremendous fluctuations in its population levels, ranging from near undetectability to the destruction of some 401004 cords of wood in 1975 (PRICE and DOGGETT, 1978). Because of its destructiveness this beetle has been the object of intense investigation by many researchers over the last decade (PAYNE, 1980). However, nearly all of this work falls into two categories, either stand-hazard rating (HicKs, 1980) or population dynamics on the local infestation (spot) level (CouLSON, 1980). These local infestations or spots are clusters of trees which are undergoing beetle colonization. Spots may contain one tree or thousands of trees and can grow over several years. New attacks within the spot are under pheromone control. However, information and analysis on the crucial aspects of inter-spot dispersal and large-scale population dynamics has remained virtually zero. Several authors have previously described the southern pine beetle (SPB) as possessing a multi-level population dynamics, i.e. several distinct levels of organization in behavior. COULSON (1979) discusses two dynamic levels, the single spot and the multiple spots situations. Each level is presumed to be a complex blend of site conditions, evnironmental stresses, and competitor/predator effects. GOLD, MAWBY and HAIN (1980) extend this two level system to a formal five-level hierarchy which includes tree, spot neighborhood, patch, subregion, and region. Furthermore this same set of authors ascribe a two phase dynamic structure to each of the five separate levels. Such two phase systems occur frequently in the dynamics of most organisms. Migratory behavior and feeding preference behavior are some common entomological examples. In particular many forest" @default.
- W1477957850 created "2016-06-24" @default.
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- W1477957850 date "1984-01-01" @default.
- W1477957850 modified "2023-09-24" @default.
- W1477957850 title "A REFERENCE CURVE AND SPACE-TIME SERIES ANALYSIS OF THE REGIONAL POPULATION DYNAMICS OF THE SOUTHERN PINE BEETLE" @default.
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