TY - JOUR
T1 - Quantifying massive outbreaks of the defoliator moth Ormiscodes amphimone in deciduous Nothofagus-dominated southern forests using remote sensing time series analysis
AU - Estay, Sergio A.
AU - Chávez, Roberto O.
AU - Rocco, Ronald
AU - Gutiérrez, Alvaro G.
N1 - Funding Information:
The authors thank the valuable data contribution of the Chilean Agricultural and Livestock Service SAG. ROCh was supported by CONICYT PAI N?82140001 (convocatoria 2014) and Fondecyt Iniciaci?n 11171046; SAE was supported by CAPES-Conicy FB-0002 (line 4), Fondecyt 1160370, and FIA PYT, 2016-0203; and AGG was supported by Fondecyt 11150835.
Funding Information:
The authors thank the valuable data contribution of the Chilean Agricultural and Livestock Service SAG. ROCh was supported by CONICYT PAI N°82140001 (convocatoria 2014) and Fondecyt Iniciación 11171046; SAE was supported by CAPES‐Conicy FB‐0002 (line 4), Fondecyt 1160370, and FIA PYT, 2016‐0203; and AGG was supported by Fondecyt 11150835.
Publisher Copyright:
© 2019 Blackwell Verlag GmbH
PY - 2019/8
Y1 - 2019/8
N2 - Forest insect outbreaks are one of the major biotic disturbances on natural and artificial landscapes. Although abundant literature of insect outbreaks exists in the Northern Hemisphere, studies for the Southern Hemisphere are rare. Recently, massive outbreaks of the native moth Ormiscodes amphimone (Fabricius) (Lepidoptera: Hemileucinae) have been reported in the southern cone of South America. These O. amphimone outbreaks have defoliated large areas of temperate forests, raising great concern among local inhabitants, but yet the spatio-temporal patterns of these events have not been evaluated. Here, we quantify the extension of the massive O. amphimone outbreaks occurred in the Aysén region (southern Chile) in the period 2000–2015 using a novel remote sensing approach and field data. Remote sensing detections were strongly in agreement with field observations and showed that massive outbreaks of O. amphimone are among the largest biotic disturbances in the forests of the Southern Hemisphere. Considering only field-confirmed outbreaks, the defoliated area reached 164,000 hectares in total between 2000 and 2015. The estimation of the spatial impact of O. amphimone, and its recurrence, represents the first step for the search of management alternatives of this massive disturbance.
AB - Forest insect outbreaks are one of the major biotic disturbances on natural and artificial landscapes. Although abundant literature of insect outbreaks exists in the Northern Hemisphere, studies for the Southern Hemisphere are rare. Recently, massive outbreaks of the native moth Ormiscodes amphimone (Fabricius) (Lepidoptera: Hemileucinae) have been reported in the southern cone of South America. These O. amphimone outbreaks have defoliated large areas of temperate forests, raising great concern among local inhabitants, but yet the spatio-temporal patterns of these events have not been evaluated. Here, we quantify the extension of the massive O. amphimone outbreaks occurred in the Aysén region (southern Chile) in the period 2000–2015 using a novel remote sensing approach and field data. Remote sensing detections were strongly in agreement with field observations and showed that massive outbreaks of O. amphimone are among the largest biotic disturbances in the forests of the Southern Hemisphere. Considering only field-confirmed outbreaks, the defoliated area reached 164,000 hectares in total between 2000 and 2015. The estimation of the spatial impact of O. amphimone, and its recurrence, represents the first step for the search of management alternatives of this massive disturbance.
KW - defoliation
KW - enhanced vegetation index
KW - ormiscodes
KW - remote sensing
KW - southern beech forests
UR - http://www.scopus.com/inward/record.url?scp=85064476509&partnerID=8YFLogxK
U2 - 10.1111/jen.12643
DO - 10.1111/jen.12643
M3 - Article
AN - SCOPUS:85064476509
VL - 143
SP - 787
EP - 796
JO - Journal of Applied Entomology
JF - Journal of Applied Entomology
SN - 0931-2048
IS - 7
ER -