Dynamics of plant populations in Heteropogon contortus - Tropical ...
Dynamics of plant populations in Heteropogon contortus - Tropical ...
Dynamics of plant populations in Heteropogon contortus - Tropical ...
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Fire on <strong>Heteropogon</strong> <strong>contortus</strong> and Aristida spp. <strong>populations</strong> 83<br />
Number <strong>of</strong> <strong>plant</strong>s (No/5m 2 )<br />
(a)<br />
60<br />
40<br />
20<br />
Narrow-leaved ironbark<br />
Silver-leaved ironbark<br />
Burn<strong>in</strong>g<br />
0<br />
1992 1993 1994 1995 1996<br />
Number <strong>of</strong> <strong>plant</strong>s (No/5m 2 )<br />
(b)<br />
60<br />
40<br />
20<br />
Narrow-leaved ironbark<br />
Silver-leaved ironbark<br />
Burn<strong>in</strong>g<br />
0<br />
1992 1993 1994 1995 1996<br />
Figure 4. Changes <strong>in</strong> the survival over time <strong>of</strong> (a) H. <strong>contortus</strong> and (b) Aristida spp. <strong>plant</strong>s <strong>in</strong> unburnt narrow-leaved<br />
ironbark and silver-leaved ironbark pastures and mixed pasture burned <strong>in</strong> spr<strong>in</strong>g <strong>in</strong> H. <strong>contortus</strong> pasture <strong>in</strong> southern<br />
Queensland.
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