Agriculture Reference
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0
20
100
10
Time since fire (years)
Fig. 8.5 The characteristic relationship between species richness/diversity and time since last
fire in MTV (see Gill 1999).
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10
100
Inter-fire interval (years) (log scale)
High
Low
Variation in inter-fire interval
Fig. 8.6 The predicted relationship between species richness/diversity and mean length of
inter-fire interval (i.e. fire return interval) in MTV. The dotted line and scale represent response
of MTV communities under relatively high productivity conditions (e.g. wet heaths and open
forests). In this case richness and diversity may be more responsive to variability in the inter-fire
interval (dotted line and scale) .
Obligate seeders are predicted to have a unimodal response to fire recurrence,
principally because establishment is typically tightly keyed to fire. Thus, extripa-
tion is likely under frequent or infrequent fire and persistence favored by inter-
mediate disturbance frequency and low variance in frequency. Shrub-dominated
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