Junttila , S , Holopainen , M , Vastaranta , M , Lyytikäinen-Saarenmaa , P , Kaartinen , H , Hyyppä , J & Hyyppä , H 2019 , ' The potential of dual-wavelength terrestrial lidar in early detection of Ips typographus (L.) infestation – Leaf water content as a proxy ' , Remote Sensing of Environment , vol. 231 , 111264 . https://doi.org/10.1016/j.rse.2019.111264
Title: | The potential of dual-wavelength terrestrial lidar in early detection of Ips typographus (L.) infestation – Leaf water content as a proxy |
Author: | Junttila, S.; Holopainen, M.; Vastaranta, M.; Lyytikäinen-Saarenmaa, P.; Kaartinen, H.; Hyyppä, J.; Hyyppä, H. |
Contributor organization: | Forest Health Group Laboratory of Forest Resources Management and Geo-information Science Department of Forest Sciences Forest Ecology and Management |
Date: | 2019-09-15 |
Language: | eng |
Number of pages: | 15 |
Belongs to series: | Remote Sensing of Environment |
ISSN: | 0034-4257 |
DOI: | https://doi.org/10.1016/j.rse.2019.111264 |
URI: | http://hdl.handle.net/10138/304282 |
Abstract: | Climate change is causing novel forest stress around the world due to changes in environmental conditions. Forest pest insects, such as Ips typographus (L.), are spreading toward the northern latitudes and are now able to produce more generations in their current range; this has increased forest disturbances. Timely information on tree decline is critical in allowing forest managers to plan effective countermeasures and to forecast potential infestation areas. Field-based infestation surveys of bark beetles have traditionally involved visual estimates of entrance holes, resin flow, and maternal-gallery densities; such estimates are prone to error and bias. Thus, objective and automated methods for estimating tree infestation status are required. In this study, we investigated the feasibility of dual-wavelength terrestrial lidar in the estimation and detection of I. typographus infestation symptoms. In addition, we examined the relationship between leaf water content (measured as gravimetric water content and equivalent water thickness) and infestation severity. Using two terrestrial lidar systems (operating at 905 nm and 1550 nm), we measured 29 mature Norway spruce (Picea abies [L.] Karst.) trees that exhibited low or moderate infestation symptoms. We calculated single and dual-wavelength lidar intensity metrics from stem and crown points to test these metrics' ability to discriminate I. typographus infestation levels using regressions and linear discriminant analyses. Across the various I. typographus infestation levels, we found significant differences (p |
Subject: |
4112 Forestry
Tree health Dual-wavelength lidar Terrestrial laser scanning Leaf water content Bark beetle infestation Multispectral lidar BARK BEETLE INTENSITY CLIMATE-CHANGE TREE MORTALITY DECLINE REFLECTANCE Ips typographus LASER SCANNER |
Peer reviewed: | Yes |
Rights: | cc_by_nc_nd |
Usage restriction: | openAccess |
Self-archived version: | publishedVersion |
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