Underpinnings of fire management for biodiversity conservation in ...

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Chapter 4 Fuel modification by grazing or browsing . . . . . . . . .58
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Environmental effects of grazing ..............................60
Grazing regimes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Conservation under grazing and burning regimes . . . . . . . . . . . . . . . . 67
Discussion and conclusion ...................................68
Chapter 5 Between-fire intervals, times since fire
and variations in both . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Regular or random: a simple model ............................75
Effects of a fixed-minimum interval ............................81
General theory for between-fire interval and time-since-fire
distribution with a given fire-free interval ....................86
Discussion and conclusion ...................................91
Chapter 5a Probability of burning at a point in relation
to time since fire and between-fire interval . . . . . . . . . . . . . . .92
Probability of burning taking place at a point in the landscape . . . . . . . 92
Heterogeneity within landscapes ..............................93
Chapter 6 Fire intervals in practice: which mean,
what variation? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Fire intervals before white settlement . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Intervals based on recent post-settlement history . . . . . . . . . . . . . . . . . 97
Intervals based on plant species’ characteristics: some background . . . . 99
Choosing a between-fire interval: fuels and plant species . . . . . . . . . . 102
Animal species as indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Using contemporary fire histories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Text Box 6.1. Conservation of Athrotaxis selaginoides,
an endemic Tasmanian conifer: a case history ................112
Discussion and conclusion ..................................113
Fire and adaptive management Underpinnings of fire management for biodiversity conservation in reserves