Application of General Circulation Models to Assess the Potential Impact of Climate Change on Potential Distribution and Relative Abundance of Melanoplus sanguinipes (Fabricius) (Orthoptera: Acrididae) in North America

Table 1

CLIMEX parameter values used to predict potential distribution and relative abundance of Melanoplus sanguinipes in North America.

CLIMEX growth parameters
Temperature
DV0	Limiting low average weekly temperature	10.0^∘C
DV1	Lower optimal average weekly minimum temperature	16.0^∘C
DV2	Upper optimal average weekly maximum temperature	28.0^∘C
DV3	Limiting high average weekly maximum temperature	32.0^∘C
Moisture
SM0	Limiting low soil moisture	0.02
SM1	Lower optimal soil moisture	0.05
SM2	Upper optimal soil moisture	0.30
SM3	Limiting high soil moisture	0.70
Diapause
DPD0	Diapause induction day length	11 h
DPT0	Diapause induction temperature (average weekly minimum)	11.0^∘C
DPD1	Diapause termination temperature (average weekly minimum)	3.0^∘C
DPD	Diapause development days	120
DPSW	Summer or winter diapause	0
CLIMEX Stress Parameters:
Cold stress
TTCS	Cold stress threshold (average weekly minimum temperature)	−18.0^∘C
THCS	Rate of cold stress accumulation	−0.0004
Heat stress
TTHS	Heat stress threshold (mean weekly maximum temperature)	35.0^∘C
THHS	Rate of heat stress accumulation	0.008
Dry stress
SMDS	Dry stress threshold (mean weekly minimum soil moisture)	0.020
HDS	Rate of dry stress accumulation	−0.003
Wet stress
SMWS	Wet stress threshold (mean weekly maximum soil moisture)	0.7
HWS	Rate of wet stress accumulation	0.001