Landscape, fire and habitat: which features of recently burned heathland influence site occupancy of an early successional specialist?
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Multiple ecological drivers generate spatial patterns in species’ distributions. Changes to natural disturbance regimes can place early successional habitat specialists at an increased risk of extinction by altering landscape patterns of habitat suitability.
We developed a series of hypotheses to evaluate the effects of landscape structure, fire history, and site-level habitat quality on site occupancy by an early successional specialist, the eastern chestnut mouse (Pseudomys gracilicaudatus).
We obtained eight years of monitoring data from 26 sites in recently burned heathland in southeast Australia. We used generalised linear models to determine which explanatory variables were related to occupancy. We also explored predictability in patterns of small mammal species co-occurrence.
Landscape structure (patch area, landscape heterogeneity) was strongly related to site occupancy. Site occupancy was associated with dead shrubs in the understory and rock cover on ground layer, but was not directly influenced by recent or historical fire. Contrary to contemporary ecological theory, we found no predictable species associations in our early successional community.
We recommend surveys take account of landscape configuration and proximity to suitable habitat for optimal results. Fire regimes expected to promote eastern chestnut mouse population growth should encourage the retention of critical habitat features rather than be based on temporal rates of successional stages. For management to adequately account for post-disturbance patterns in early successional communities, a species-by-species, multi-scaled approach to research is necessary.
KeywordsFire Succession Heathland Patch area Landscape heterogeneity Habitat specialist
We most gratefully acknowledge the Wreck Bay Aboriginal Community and the Wandandian People of the Dharawal and Dhurga language groups on whose lands this study was conducted. Mason Crane, Damien Michael, Rebecca Montague-Drake, and Sachiko Okada provided fieldwork assistance. This project is part of a major study in Booderee National Park funded by the Australian Research Council, the Department of Environment and Water Resources and the Department of Defence.
- Bradstock RA, Williams J, Gill AM (eds) (2012) Flammable Australia: the fire regimes and biodiversity of a continent. Cambridge University Press, CambridgeGoogle Scholar
- Braithwaite RW (1982) Small marginal groups of Rattus lutreolus in good and poor habitat. J Zool 198:529–532Google Scholar
- Breed B, Ford F (2007) Native mice and rats. CSIRO Publishing, CollingwoodGoogle Scholar
- Burel F, Baudry J (2003) Landscape ecology: concepts, methods and applications. Science Publishers, EnfieldGoogle Scholar
- Burnham KP, Anderson DR (2002) Model selection and multi-modal inference: a practical information-theoretic approach. Springer, New YorkGoogle Scholar
- Catling PC (1991) Ecological effects of prescribed burning practices on the mammals of southeastern Australia. In: Lunney D (ed) Conservation of Australia’s forest fauna. Royal Zoological Society of NSW, NSW, pp 353–363Google Scholar
- Conover WJ (1999) Practical nonparametric statistics, 3rd edn. Wiley, New YorkGoogle Scholar
- Crowther MS, Braithwaite RW (2008) Brown antechinus, Antechinus stuartii. In: Van Dyck S, Strahan R (eds) The mammals of Australia. Reed New Holland, Sydney, pp 94–96Google Scholar
- Di Stefano J, Owen L, Morris R, Duff T, York A (2011) Fire, landscape change and models of small mammal habitat suitability at multiple spatial scales. Aust Ecol 36:638–649Google Scholar
- Dickman CR (2008) Agile antechinus, Antechinus agilis. In: Van Dyck S, Strahan R (eds) The mammals of Australia. Reed New Holland, Sydney, pp 83–84Google Scholar
- ESRI 2009. ArcMap 9.2. Environmental Systems Resource Institute, CaliforniaGoogle Scholar
- Fox BJ (2008) Eastern chestnut mouse, Pseudomys gracilicaudatus. In: Van Dyck S, Strahan R (eds) The mammals of Australia. Reed New Holland, Sydney, pp 634–635Google Scholar
- Keith DA, McCaw WL, Whelan RJ (2002) Fire regimes in Australian heathlands and their effects on plants and animals. In: Bradstock RA, Williams JE, Gill AM (eds) Flammable Australia: the fire regimes and biodiversity of a continent. Cambridge University Press, New York, pp 199–237Google Scholar
- Lindenmayer DB, MacGregor C, Wood JT, Cunningham RB, Crane M, Michael D, Montague-Drake R, Brown D, Fortescue M, Dexter N, Hudson M, Gill AM (2009) What factors influence rapid post-fire site re-occupancy? A case study of the endangered eastern bristlebird in eastern Australia. Intern J Wildl Fire 18:84–95CrossRefGoogle Scholar
- Lunney D (2008a) Bush rat, Rattus fuscipes. In: Van Dyck S, Strahan R (eds) The mammals of Australia. Reed New Holland, Sydney, pp 685–687Google Scholar
- Lunney D (2008b) Swamp rat, Rattus lutreolus. In: Van Dyck S, Strahan R (eds) The mammals of Australia. Reed New Holland, Sydney, pp 690–692Google Scholar
- MacArthur RH, Wilson EO (1967) The theory of island biogeography. Princeton University Press, New JerseyGoogle Scholar
- Newsome AE, McIlroy J, Catling PC (1975) The effects of an extensive wildfire on populations of twenty ground vertebrates in southeast Australia. Proc Ecol Soc Aust 9:107–123Google Scholar
- Pickett STA, White PS (eds) (1985) The ecology of natural disturbance and patch dynamics. Academic Press Inc, FloridaGoogle Scholar
- Robinson AC (1987) The ecology of the bush rat, Rattus fuscipes (Rodentia: Muridae), in Sherbrooke Forest, Victoria. Aust Mammal 11:35–49Google Scholar
- Specht RL (1981) Responses to fire in heathlands and related shrublands. In: Gill AM, Groves RH, Noble IR (eds) Fire and the Australian biota. Australian Academy of Science, Canberra, pp 395–415Google Scholar
- Taws N (1997) Vegetation survey and mapping of Jervis Bay Territory. Report, CanberraGoogle Scholar
- Townley SJ (2000) The ecology of the Hastings River mouse Pseudomys oralis (Rodentia: Muridae) in northeastern New South Wales and southeastern Queensland. PhD, Southern Cross University, LismoreGoogle Scholar
- Warneke RM (1971) Field study of the bush rat (Rattus fuscipes). Wildl Contrib Vic 14:1–115Google Scholar
- Watts CHS, Aslin HJ (1981) The rodents of Australia. Angus & Robertson Publishers, SydneyGoogle Scholar
- Whelan RJ (1995) The ecology of fire. Cambridge University Press, CambridgeGoogle Scholar
- Whelan RJ, Rodgerson L, Dickman CR, Sutherland EF (2002) Critical life cycles of plants and animals: developing a process-based understanding of population changes in fire-prone landscapes. In: Bradstock RA, Williams JE, Gill AM (eds) Flammable Australia: the fire regimes and biodiversity of a continent. Cambridge University Press, New York, pp 94–124Google Scholar
- Williams DG (1995) Heaths and scrubs. In: Cho G, Georges A, Stoutjesdijk R, Longmore R (eds) Jervis Bay. A place of cultural, scientific and educational value. Kowari 5. Australian Nature Conservation Agency, Canberra, pp 83–90Google Scholar