- Title
- Fire and its interactions with other drivers shape a distinctive, semi-arid ‘mallee’ ecosystem
- Creator
- Clarke, Michael; Kelly, Luke; Avitabile, Sarah; Benshemesh, Joe; Westbrooke, Martin
- Date
- 2021
- Type
- Text; Journal article; Review
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/177818
- Identifier
- vital:15344
- Identifier
-
https://doi.org/10.3389/fevo.2021.647557
- Identifier
- ISBN:2296-701X (ISSN)
- Abstract
- Fire shapes ecosystems globally, including semi-arid ecosystems. In Australia, semi-arid ‘mallee’ ecosystems occur primarily across the southern part of the continent, forming an interface between the arid interior and temperate south. Mallee vegetation is characterized by short, multi-stemmed eucalypts that grow from a basal lignotuber. Fire shapes the structure and functioning of mallee ecosystems. Using the Murray Mallee region in south-eastern Australia as a case study, we examine the characteristics and role of fire, the consequences for biota, and the interaction of fire with other drivers. Wildfires in mallee ecosystems typically are large (1000s ha), burn with high severity, commonly cause top-kill of eucalypts, and create coarse-grained mosaics at a regional scale. Wildfires can occur in late spring and summer in both dry and wet years. Recovery of plant and animal communities is predictable and slow, with regeneration of eucalypts and many habitat components extending over decades. Time since the last fire strongly influences the distribution and abundance of many species and the structure of plant and animal communities. Animal species display a discrete set of generalized responses to time since fire. Systematic field studies and modeling are beginning to reveal how spatial variation in fire regimes (‘pyrodiversity’) at different scales shapes biodiversity. Pyrodiversity includes variation in the extent of post-fire habitats, the diversity of post-fire age-classes and their configuration. At regional scales, a desirable mix of fire histories for biodiversity conservation includes a combination of early, mid and late post-fire age-classes, weighted toward later seral stages that provide critical habitat for threatened species. Biodiversity is also influenced by interactions between fire and other drivers, including land clearing, rainfall, herbivory and predation. Extensive clearing for agriculture has altered the nature and impact of fire, and facilitated invasion by pest species that modify fuels, fire regimes and post-fire recovery. Given the natural and anthropogenic drivers of fire and the consequences of their interactions, we highlight opportunities for conserving mallee ecosystems. These include learning from and fostering Indigenous knowledge of fire, implementing actions that consider synergies between fire and other processes, and strategic monitoring of fire, biodiversity and other drivers to guide place-based, adaptive management under climate change. © Copyright © 2021 Clarke, Kelly, Avitabile, Benshemesh, Callister, Driscoll, Ewin, Giljohann, Haslem, Kenny, Leonard, Ritchie, Nimmo, Schedvin, Schneider, Watson, Westbrooke, White, Wouters and Bennett. **Please note that there are multiple authors for this article therefore only the name of the first 5 including Federation University Australia affiliate “Martin Westbrooke” is provided in this record**
- Publisher
- Frontiers Media S.A.
- Relation
- Frontiers in Ecology and Evolution Vol. 9, no. (2021), p.
- Rights
- All metadata describing materials held in, or linked to, the repository is freely available under a CC0 licence
- Rights
- https://creativecommons.org/licenses/by/4.0/
- Rights
- Copyright © 2021 Clarke, Kelly, Avitabile, Benshemesh, Callister, Driscoll, Ewin, Giljohann, Haslem, Kenny, Leonard, Ritchie, Nimmo, Schedvin, Schneider, Watson, Westbrooke, White, Wouters and Bennett.
- Rights
- Open Access
- Subject
- 0602 Ecology; 0603 Evolutionary Biology; Biodiversity; Fire regimes; Mallee; Pyrodiversity; Species responses to fire
- Full Text
- Reviewed
- Funder
- This synthesis arose from a workshop at La Trobe University held as part of the Mallee-Hawkeye Project, funded by the then Department of Environment and Primary Industries, Victoria, Australia.
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