Table 1. Geographic coordinates for sampling locations and associated WORLDCLIM (Hijmans et al., 2005) climate data: maximum temperature of warmest month (°C), minimum temperature of coldest month (°C), mean annual precipitation (mm) and mean annual temperature range (°C).

Region	Location	Latitude	Longitude	Max temp warmest month (°C)	Min temp coldest month (°C)	Precipitation (mm)	Annual temp range (°C)
Coastal	Clarence River	−29.49632a	153.29391a	27.2	8.3	36	18.9
Coastal	Mary River	−26.83406a	152.69057a	27.7	5.6	45	22.0
Coastal	Cataract Dam	−34.26566	150.81000	25.5	3.9	28	21.7
Inland	Murrumbidgee River	−34.64000	146.37400	32.3	3.4	13	28.9
Inland	Darling River	−30.64600	144.92600	35.2	5.0	27	30.2
Inland	Lachlan River	−33.61600	145.30000	32.7	3.6	15	29.1
Inland	Murray River	−35.96628	145.85256	31.2	3.4	17	27.8
Inland	Macintyre River	−28.60233	149.96233	33.8	4.5	33	29.3
Inland	Ovens River	−36.53400	146.66933	28.7	2.0	29	26.7
Inland	Murray River	−35.98070	145.82780	31.2	3.4	16	27.8

Climate variables are derived from monthly temperature and rainfall data.

^aGeographic coordinates for the Clarence River and Mary River samples are approximate sampling coordinates as exact GIS locations were unavailable.