Geography Reference
In-Depth Information
Fig. 8 Aggregated and extruded three-dimensional ringmaps of habitat use of possum (#1882) at
Muriwai, New Zealand, autumn and summer, 2007-2008. Height represents the proportion of
habitat use. Colours depicting habitat types are the same as Fig. 7 (but semi-transparent). '0-12'
indicates hour after sunset
Fig. 9 Annual matrix of nightly rates of travel (depicted by colours) of possum (#1882). Each
row represents a 10-min interval of hour after sunset, ordered sequentially from the bottom. Each
column represents one night starting from March 2007 and ending in February 2008. Southern
hemisphere seasons are labelled at the top of the image
changes in the behaviour. During June 2007, there was an unusually long period
when the possum's movements were much slower than average (these are depicted
in yellow). At first we surmised that these slower movements could be the result of
periods of heavy rain, which are common at that time of the year, but weather
data showed no heavy rain during that period. This phenomenon has aroused
our curiosity and will be the subject of future investigation. Periods of markedly
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