Journal ArticleDOI
The effects of bark beetle stress on the foliar spectral reflectance of lodgepole pine
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In this paper, the spectral properties of lodgepole pine trees under mountain pine beetle attack were investigated and three spectral bands (the green peak, red edge and near-infrared (NIR) shoulder regions) were identified as most promising for detecting early effects of bark beetle attack.Abstract:
Abstract. This paper reports the results of a study of the foliar reflectance properties of lodgepole pine trees under mountain pine beetle attack which aimed to determine the sequence of changes which occur. The motivation for this study was to identify spectral regions showing the earliest signs of attack in order to choose spectral bands for airborne linear array sensors. Normal illumination, diffuse hemispherical reflectance spectra were obtained of needles from trees showing varying degrees of stress from beetle attack and for needles from unattacked trees for comparison. The more pronounced changes in the spectra were interpreted visually and compared to changes reported by other authors. The more subtle changes were studied by analysing variance methods. Three spectral bands (the green peak, red edge and near-infrared (NIR) shoulder regions) have been identified as most promising for detecting early effects of bark beetle attack. Three additional bands (the blue, red and NIR plateau region...read more
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Journal ArticleDOI
Responses of leaf spectral reflectance to plant stress.
TL;DR: Reflectance at visible wavelengths increased consistently in stressed leaves for eight stress agents and among six vascular plant species, and was spectrally similar among agents of stress and species.
Book ChapterDOI
Agriculture, Forestry and Fisheries
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Journal ArticleDOI
Effects of biotic disturbances on forest carbon cycling in the United States and Canada
Jeffrey A. Hicke,Craig D. Allen,Ankur R. Desai,Michael Dietze,Ronald J. Hall,Edward H. Hogg,Daniel M. Kashian,David J. P. Moore,Kenneth F. Raffa,Rona N. Sturrock,James E. Vogelmann +10 more
TL;DR: This paper reviewed and synthesized published studies of the effects of biotic disturbances on forest C cycling in the United States and Canada and concluded that such disturbances can have major impacts on forest carbon stocks and fluxes and can be large enough to affect regional carbon cycle.
Journal ArticleDOI
Surveying mountain pine beetle damage of forests: A review of remote sensing opportunities
TL;DR: In this paper, the authors summarized previous and current contributions of remote sensing to the survey of mountain pine beetle impacts and concluded that remotely sensed data is useful for mapping red-attack damage across a range of image data types and scales of inquiry.
The mountain pine beetle: a synthesis of biology, management and impacts on lodgepole pine.
L. Safranyik,Bill Wilson +1 more
TL;DR: The abundance of mature age class timber in the inventory and a trend to warmer, drier summers and infrequent cold winter weather can combine to alter the balance between pest and host in forest ecosystems.
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