Water temperature was measured within the seagrass canopy
at four island locations spread over approximately 400 km in the
northern Great Barrier Reef, Australia: Low Isles (16 23.00 , 145
33.90), Green Island (16 45.50 , 145 58.40); Dunk Island (17
56.80 , 146 08.50); and Magnetic Island (19 10.730 , 146 50.470).
The maximum tidal range at these locations is from c.a. 3 to 4m
during spring tides. All are intertidal meadows but they differ in
the extent to which the meadows drain at low tide ranging from
+0.6 m above lowest astronomical tide (LAT) at Low Isles to
+1.0 m at Magnetic Island (i.e. exposing with a smaller drop in
sea level), while the remaining 2 sites are approximately +0.8 m
above LAT. Temperature loggers (Thermodata iBtag G) were fastened
to star pickets at canopy height and recorded water temperature
every 90 min. These were exchanged quarterly, and some
technical complications resulted in small data gaps throughout.
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