Integrating demography and fire management: an example from Florida scrub

2007 ◽  
Vol 55 (3) ◽  
pp. 261 ◽  
Author(s):  
Eric S. Menges
Keyword(s):  
Life Histories ◽  
Fire Management ◽  
Fire Suppression ◽  
Demographic Data ◽  
Fire Regimes ◽  
Population Viability ◽  
Florida Scrub ◽  
Ecological Disturbance ◽  
Population Viability Analyses ◽  
In Fire

In this work, I have used life-history and demographic data to define fire return intervals for several types of Florida scrub, a xeric shrubland where fire is the dominant ecological disturbance but where fire suppression is a major issue. The datasets combine chronosequence and longitudinal approaches at community and population levels. Resprouting shrubs, which dominate most types of Florida scrub, recover rapidly after fires (although their limits under frequent fires are not well known) and also increasingly dominate long-unburned areas. These dominant shrubs can prosper over a range of fire return intervals. Obligate-seeding scrub plants, which often have persistent seed banks, can be eliminated by frequent fire but often decline with infrequent fire. Population viability analyses of habitat specialists offer more precision in suggesting ranges of appropriate fire return intervals. For two types of Florida scrub (rosemary scrub and oak–hickory scrub), plant-population viability analyses narrow the interval and suggest more frequent fires than do previous recommendations, at intervals of 15–30 and 5–12 years, respectively. Variation in fire regimes in time and space (pyrodiversity) is recommended as a bet-hedging fire-management strategy and to allow co-existence of species with disparate life histories.

From fire suppression to fire management: Advances and resistances to changes in fire policy in the savannas of Brazil and Venezuela

2018 ◽  
Vol 185 (1) ◽  
pp. 10-22 ◽  
Author(s):  
Ludivine Eloy ◽  
Bibiana A. Bilbao ◽  
Jayalaxshmi Mistry ◽  
Isabel B. Schmidt
Keyword(s):  
Fire Management ◽  
Fire Suppression ◽  
Fire Policy ◽  
In Fire

Changing fuel management strategies - The challenge of meeting new information and analysis needs

2001 ◽  
Vol 10 (4) ◽  
pp. 267 ◽  
Author(s):  
Susan G. Conard ◽  
Timothy Hartzell ◽  
Michael W. Hilbruner ◽  
G. Thomas Zimmerman
Keyword(s):  
Fire Management ◽  
Wildland Fire ◽  
Fire Suppression ◽  
Fire Hazard ◽  
Management Strategies ◽  
Scientific Basis ◽  
Fuel Management ◽  
Burned Areas ◽  
Ecological Principles ◽  
In Fire

This paper was presented at the conference ‘Integrating spatial technologies and ecological principles for a new age in fire management’, Boise, Idaho, USA, June 1999 ‘The earth, born in fire, baptized by lightning since before life"s beginning, has been and is a fire planet.’ E.V. Komarek Attitudes and policies concerning wildland fire, fire use, and fire management have changed greatly since early European settlers arrived in North America. Active suppression of wildfires accelerated early in the 20th Century, and areas burned dropped dramatically. In recent years, burned areas and cost of fires have begun to increase, in part due to fuel buildups resulting from fire suppression. The importance of fire as an ecosystem process is also being increasingly recognized. These factors are leading to changes in Federal agency fire and fuels management policies, including increased emphasis on use of prescribed fire and other treatments to reduce fuel loads and fire hazard. Changing fire management strategies have highlighted the need for better information and improved risk analysis techniques for setting regional and national priorities, and for monitoring and evaluating the ecological, economic, and social effects and tradeoffs of fuel management treatments and wildfires. The US Department of Interior and USDA Forest Service began the Joint Fire Science Program in 1998 to provide a sound scientific basis for implementing and evaluating fuel management activities. Development of remote sensing and GIS tools will play a key role in enabling land managers to evaluate hazards, monitor changes, and reduce risks to the environment and the public from wildland fires.

Inter- and intra-annual profiles of fire regimes in the managed forests of Canada and implications for resource sharing

2012 ◽  
Vol 21 (4) ◽  
pp. 328 ◽  
Author(s):  
Steen Magnussen ◽  
Stephen W. Taylor
Keyword(s):  
Resource Sharing ◽  
Joint Distribution ◽  
Fire Management ◽  
Fire Regime ◽  
Fire Regimes ◽  
Fire Season ◽  
Burned Area ◽  
Fire Activity ◽  
In Fire ◽  
Regional Synchrony

Year-to-year variation in fire activity in Canada constitutes a key challenge for fire management agencies. Interagency sharing of fire management resources has been ongoing on regional, national and international scales in Canada for several decades to better cope with peaks in resource demand. Inherent stressors on these schemes determined by the fire regimes in constituent jurisdictions are not well known, nor described by averages. We developed a statistical framework to examine the likelihood of regional synchrony of peaks in fire activity at a timescale of 1 week. Year-to-year variations in important fire regime variables and 48 regions in Canada are quantified by a joint distribution and profiled at the Provincial or Territorial level. The fire regime variables capture the timing of the fire season, the average number of fires, area burned, and the timing and extent of annual maxima. The onset of the fire season was strongly correlated with latitude and longitude. Regional synchrony in the timing of the maximum burned area within fire seasons delineates opportunities for and limitations to sharing of fire suppression resources during periods of stress that were quantified in Monte Carlo simulations from the joint distribution.

scholarly journals Valutazione del rischio di incendi boschivi a livello locale: una proposta metodologica | Fire risk assessment on a local scale: a methodological approach

2005 ◽  
Vol 156 (9) ◽  
pp. 331-337
Author(s):  
Marco Conedera ◽  
Patrick Roth ◽  
Gabriele Corti ◽  
Daniele Ryser
Keyword(s):  
Fire Management ◽  
Landscape Planning ◽  
Fire Suppression ◽  
Fire Hazard ◽  
Methodological Approach ◽  
Fire Risk ◽  
Fire Control ◽  
Fire Risk Analysis ◽  
Planning Processes ◽  
In Fire

Fire-services are often unable to obtain a rapid overview of problems connected with wildfire fighting. In the last few decades the ideology for fire fighting has shifted from fire control(basically fire suppression) to fire management (including prevention,planning, and simulating). As a result, fire management is now included in landscape planning processes. The preliminary step in fire management is fire risk analysis, which takes into account fire hazard (probability and expected severity of a fire) and the outcome (total impact on the affected environment). In this contribution we present an approach for assessing fire risk on local levels in southern Switzerland.

Goal setting and Indigenous fire management: a holistic perspective

2020 ◽  
Vol 29 (11) ◽  
pp. 974
Author(s):  
William Nikolakis ◽  
Emma Roberts ◽  
Ngaio Hotte ◽  
Russell Myers Ross
Keyword(s):  
First Nations ◽  
Goal Setting ◽  
Management Practices ◽  
Fire Management ◽  
Fire Suppression ◽  
Well Being ◽  
Management Program ◽  
And Cluster Analysis ◽  
General Goals ◽  
In Fire

After generations of fire-suppression policy, Indigenous fire management (IFM) is being reactivated as one way to mitigate wildfire in fire-prone ecosystems. Research has documented that IFM also mitigates carbon emissions, improves livelihoods and enhances well-being among participants. This study documents the goals of the Yunesit’in and Xeni Gwet’in First Nations as they develop a fire management program in central British Columbia, Canada. Drawing on goal setting theory and interviews, a qualitative coding and cluster analysis identified three general goals from fire management: (1) strengthen cultural connection and well-being, (2) restore the health of the land and (3) respect traditional laws. Sub-goals included enhancing community member health and well-being, improving fire management practices to maintain ‘pyrodiversity’ and food security and re-empowering Indigenous laws and practices. This community-developed framework will guide program evaluation and brings insight to a theory of IFM.

Traditional and ecological fires and effects of bushfire laws in north Australian savannas

2007 ◽  
Vol 16 (4) ◽  
pp. 378 ◽  
Author(s):  
Noel Preece
Keyword(s):  
Land Management ◽  
High Frequency ◽  
Prescribed Burning ◽  
Fire Management ◽  
Management Strategies ◽  
Fire Regimes ◽  
Ecosystem Dynamics ◽  
Traditional Practices ◽  
The North ◽  
In Fire

Landscape fires are common and frequent across the north Australian savannas, and are arguably an essential component of regional ecosystem dynamics. Seasonal biases in fire regimes and the high frequency of late dry season fires in a large proportion of the region have been presented as an impediment to appropriate land management. Legislation regulating the lighting of fires applies to the whole of the savannas. The legislation seeks to control the lighting of fires, provides for permit systems to operate in each jurisdiction, and is supported by policies and guidance manuals. The present paper argues that the legislation fails to address prescribed burning, the biophysical and social realities of contemporary regimes, and management needs. The policies and legislation are in need of some fundamental changes, including recognition of the concept of prescribed burning, mechanisms to promote regional fire management strategies and plans, and recognition of indigenous traditional practices.

Traditional fire management: historical fire regimes and land use change in pastoral East Africa

2009 ◽  
Vol 18 (4) ◽  
pp. 442 ◽  
Author(s):  
Ramona J. Butz
Keyword(s):  
Land Use ◽  
Fire Management ◽  
Fire Suppression ◽  
Fire Regimes ◽  
Sub Saharan Africa ◽  
Management Tool ◽  
Subsequent Increase ◽  
Late Season ◽  
Savanna Vegetation ◽  
Sub Saharan

Although there is considerable research on the ecological effects of fire in sub-Saharan Africa, research on traditional fire practices is very limited and the consequences of substantial changes to historical fire regimes have not been adequately explored. The present paper examines historic and contemporary uses of fire as a land management tool among Maasai pastoralists in northern Tanzania and explores the potential impacts of changing fire management and fire suppression on savanna vegetation. Village members were interviewed about historical and current practices, reasons for burning, the history of land use, and their perceptions of fire. Eight recent burn sites were selected for examination of size, ignition source, and timing of the burn. The Maasai identified eight major reasons for using fire on a landscape scale in savannas and historically used a progression of small fires throughout the dry season as grasses cured to create a fragmented burn pattern and to prevent large, catastrophic late-season fires. Currently, there is little active vegetation management using fire largely owing to federal fire suppression policies, unpredictable rainfall patterns, increasing population pressures, and a subsequent increase in the number of catastrophic accidental fires. Substantial modifications to historical fire regimes could have cascading consequences for savanna health by increasing late-season fuel loads and the occurrence of large, catastrophic fires.

The persistence niche: what makes it and what breaks it for two fire-prone plant species

2007 ◽  
Vol 55 (3) ◽  
pp. 273 ◽  
Author(s):  
David A. Keith ◽  
Mark G. Tozer ◽  
Tracey J. Regan ◽  
Helen M. Regan
Keyword(s):  
Life History ◽  
Seed Production ◽  
Life Histories ◽  
Phytophthora Cinnamomi ◽  
Population Viability ◽  
Vital Rates ◽  
High Fecundity ◽  
In Fire ◽  
Rates Of Growth ◽  
Regeneration Niches

Persistence niches are expected to favour qualitatively different plant life histories compared with regeneration niches. In fire-prone habitats, for example, resprouting plants may be expected to exploit persistence niches, whereas obligate-seeders by definition exploit regeneration niches. Resprouter life histories should be typified by high rates of survival, which may be offset by relatively low rates of growth and reproduction. This combination of characters is expected to result from trade-offs in resource allocation and because the longevity of individual plants should buffer their populations against the effects of recruitment failure. We asked whether two resprouting perennial shrubs, Epacris barbata Melville and Xanthorrhoea resinifera (Sol. Ex Kite) E.C.Nelson & D.J.Bedford, exhibited the life-history character combinations that are expected for species exploiting a persistence niche. We also investigated how a change in habitat suitability caused by the invasion of a root pathogen may limit the ability of these species to occupy persistence niches. Demographic censuses of several years’ duration in two populations of each species yielded estimates of vital rates that were consistent with the life-history profile expected for a persistence niche. Rates of background survival were high and rates of fire-related mortality were low in both species. As expected, these were associated with low rates of growth and seedling establishment, although rates of seed production and viability were relatively high in both species. The importance of survival was confirmed by stochastic population models, which showed that population viability was more sensitive to decreases in survival of mature plants and increases in fire mortality of established plants than to changes in other vital rates. Seedling growth rates were also relatively important in E. barbata. Populations of both species that had been infected by root rot disease, Phytophthora cinnamomi, had substantially reduced survival rates and, consequently, reduced population viability. These effects were more extreme in E. barbata than in X. resinifera. We conclude that processes that reduce survival, such as disease infection and habitat loss, rather than processes that impede seed production and recruitment mediate the persistence niche. However, we discuss the possibility that this dependency might be mitigated by high fecundity if infrequent conditions that permit large recruitment events have so far eluded detection.

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