Epidemiological characterization and risk assessment of rabbit haemorrhagic disease virus 2 (RHDV2/b/GI.2) in the world

Table 1 The selected and screened variables in two maximum entropy models.

Variable category	Variable	description	Unit of measurement	Included in the model about RHDV2 in domestic rabbits	Included in the model about RHDV2 in wild rabbits
Bioclimate variables	bio1	Annual mean temperature	℃
	bio2	Mean diurnal range	℃
	bio3	Isothermality		Yes
	bio4	Temperature seasonality	℃		Yes
	bio5	Maximum temperature of the warmest month	℃
	bio6	Minimum temperature of the coldest month	℃
	bio7	Temperature annual range	℃
	bio8	Mean temperature of the wettest quarter	℃	Yes
	bio9	Mean temperature of the driest quarter	℃	Yes	Yes
	bio10	Mean temperature of the warmest quarter	℃
	bio11	Mean temperature of the coldest quarter	℃
	bio12	Annual precipitation	mm
	bio13	Precipitation of the wettest month	mm
	bio14	Precipitation of the driest month	mm
	bio15	Precipitation seasonality	%	Yes	Yes
	bio16	Precipitation of the wettest quarter	mm
	bio17	Precipitation of the driest quarter	mm
	bio18	Precipitation of the warmest quarter	mm	Yes	Yes
	bio19	Precipitation of the coldest quarter	mm	Yes	Yes
	wind	Mean annual wind speed	m·s⁻¹	Yes	Yes
	srad	Mean annual solar radiation	kJ·m⁻²·day⁻¹	Yes	Yes
Geographic variables	elev	Elevation	m	Yes	Yes
	ndvi	Normalized difference vegetation index		Yes	Yes
	lc	Land cover		Yes	Yes
socio-economic variables	popu	Population density	people·km⁻²	Yes	Yes
	road	Road density		Yes	Yes
	railway	Railway density		Yes	Yes

27 variables were selected, involving bioclimate, geographic, and socio-economic factors. After screening by the variance inflation factor (VIF), 14 environmental variables were included in the model for outbreaks of RHDV2 in domestic rabbit populations, and 13 environmental variables were included in the model for outbreaks of RHDV2 in wild rabbit populations.

ISSN: 1297-9716