Estimation of scots pine defoliation by the common pine sawfly (Diprion pini L.) using multi-temporal radar data
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چکیده
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منابع مشابه
Classification of Needle Loss of Individual Scots Pine Trees by Means of Airborne Laser Scanning
Forest disturbances caused by pest insects are threatening ecosystem stability, sustainable forest management and economic return in boreal forests. Climate change and increased extreme weather patterns can magnify the intensity of forest disturbances, particularly at higher latitudes. Due to rapid responses to elevating temperatures, forest insect pests can flexibly change their survival, disp...
متن کاملDefoliation by the Common Pine Sawfly (Diprion pini) and Subsequent Growth Reduction in Scots Pine: A Retro- spective Approach
The foliage status in the main stem of Scots pines (Pinus sylvestris) was studied retrospectively using the needle trace method (NTM) on a stand, seriously defoliated by the pine sawfly (Diprion pini) in the 1980s. Needle density increased abruptly in the seasons following the defoliation. The strongest reduction in annual needle production occurred one year later. As a consequence of lower nee...
متن کاملClassification of Defoliated Trees Using Tree-Level Airborne Laser Scanning Data Combined with Aerial Images
Climate change and rising temperatures have been observed to be related to the increase of forest insect damage in the boreal zone. The common pine sawfly (Diprion pini L.) (Hymenoptera, Diprionidae) is regarded as a significant threat to boreal pine forests. Defoliation by D. pini can cause severe growth loss and tree mortality in Scots pine (Pinus sylvestris L.) (Pinaceae). In this study, log...
متن کاملInduced accumulation of phenolics and sawfly performance in Scots pine in response to previous defoliation.
Phenolic compounds often accumulate in foliar tissues of deciduous woody plants in response to previous insect defoliation, but similar responses have been observed infrequently in evergreen conifers. We studied the effects of defoliation on the foliar chemistry of Scots pine (Pinus sylvestris L.) and cocoon mass, and survival of the pine sawfly (Diprion pini L.). In two successive years, needl...
متن کاملArea-Based Mapping of Defoliation of Scots Pine Stands Using Airborne Scanning LiDAR
The mapping of changes in the distribution of insect-caused forest damage remains an important forest monitoring application and challenge. Efficient and accurate methods are required for mapping and monitoring changes in insect defoliation to inform forest management and reporting activities. In this research, we develop and evaluate a LiDAR-driven (Light Detection And Ranging) approach for ma...
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