TY - GEN
T1 - Local spread of an exotic invader
T2 - Using remote sensing and spatial analysis to document proliferation of the invasive asian chestnut gall wasp
AU - Graziosi, I.
AU - Rieske, L. K.
PY - 2014/12/2
Y1 - 2014/12/2
N2 - Remote sensing and spatial analysis represent key tools for describing species dispersal, species invasiveness and the invasability of a region, thus allowing predictions for developing mitigation strategies. American chestnut, Castanea dentata, was historically a dominant forest species in North America but occurs only sporadically today after its elimination from the overstory by the chestnut blight fungus. In recent decades, Castanea resources have increased due to restoration efforts and multiple uses; however, this resurgence is threatened by an additional exotic insect, the globally invasive Asian chestnut gall wasp, Dryocosmus kuriphilus. The gall wasp, first detected in the USA in 1974, was discovered in Lexington, Kentucky in 2010. We used remotely sensed data and Geographic Information Systems to describe the local distribution of the Castanea hosts and the occurrence and dispersal of the gall wasp. We tested the hypotheses that local proliferation is influenced by geomorphology, Castanea occurrence and prevailing winds. We found that gall wasp spread was attributable to host plant distribution and to the effects of prevailing winds during a brief period of adult insect emergence and was influenced by topography, suggesting that weather data and topographic features can be used to delineate currently infested areas and predict future gall wasp infestations.
AB - Remote sensing and spatial analysis represent key tools for describing species dispersal, species invasiveness and the invasability of a region, thus allowing predictions for developing mitigation strategies. American chestnut, Castanea dentata, was historically a dominant forest species in North America but occurs only sporadically today after its elimination from the overstory by the chestnut blight fungus. In recent decades, Castanea resources have increased due to restoration efforts and multiple uses; however, this resurgence is threatened by an additional exotic insect, the globally invasive Asian chestnut gall wasp, Dryocosmus kuriphilus. The gall wasp, first detected in the USA in 1974, was discovered in Lexington, Kentucky in 2010. We used remotely sensed data and Geographic Information Systems to describe the local distribution of the Castanea hosts and the occurrence and dispersal of the gall wasp. We tested the hypotheses that local proliferation is influenced by geomorphology, Castanea occurrence and prevailing winds. We found that gall wasp spread was attributable to host plant distribution and to the effects of prevailing winds during a brief period of adult insect emergence and was influenced by topography, suggesting that weather data and topographic features can be used to delineate currently infested areas and predict future gall wasp infestations.
KW - Cynipidae
KW - Dryocosmus kuriphilus
KW - GIS
KW - Remote sensing
KW - Spatial analysis
UR - http://www.scopus.com/inward/record.url?scp=84899712614&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84899712614&partnerID=8YFLogxK
U2 - 10.17660/ActaHortic.2014.1019.17
DO - 10.17660/ActaHortic.2014.1019.17
M3 - Conference contribution
AN - SCOPUS:84899712614
SN - 9789462610064
T3 - Acta Horticulturae
SP - 113
EP - 118
BT - V International Chestnut Symposium
ER -