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 OJF  Vol.5 No.4 , April 2015
Facilitating Regeneration of an Iconic Canopy Species with Specific Niche Requirements
Abstract: Natural regeneration is a critical component of forest ecosystems sustainability. Local extinction can occur without adequate regenerationor seedling recruitment prior to adult senescence. The urban and peri-urban environment is particularly challenging for recruitment. For example, although many forest species have specific requirements involving fire events, few opportunities associated with fire exist in contemporary urban and peri-urban environments. For our study species, Eucalyptus gomphocephala, en masse recruitment can occur in ashbeds following a hot fire. However, this may not occur following low-intensity, fuel reduction burns that are prescribed for many E. gomphocephala woodlands and forests. Nevertheless, ashbeds could be created by constructing and burning coarse woody debris (CWD) piles. In a series of collaborative case studies involving community groups, NGOs and Local and State Government agencies, we investigated whether seedling recruitment could be facilitated through broadcast seeding after: a) creating CWD piles prior to a low intensity, prescribed burn; b) naturally-occurring ashbeds following a hot summer wildfire; and c) creating CWD piles and then burning the piles only. We found that regeneration of this post-fire, canopy gap regenerator can be facilitated by broadcast seeding naturally occurring or created ashbeds. However, it seems that protection from seed harvesters and herbivores is vital. These case studies provide tools that can be used to preserve the natural demographics in populations with specific regeneration requirements in a range of environments by leveraging natural recruitment processes and community involvement. Importantly, it is the conservation of these urban and peri-urban ecosystems that will be vital in maintaining connection between people and the environment into the future.
Cite this paper: Ruthrof, K. , Matusick, G. , Valentine, L. and Hardy, G. (2015) Facilitating Regeneration of an Iconic Canopy Species with Specific Niche Requirements. Open Journal of Forestry, 5, 402-408. doi: 10.4236/ojf.2015.54034.
References

[1]   Acacio, V., Holmgren, M., Jansen, P. A., & Schrotter, O. (2007). Multiple Recruitment Limitation Causes Arrested Succession in Mediterranean Cork Oak Systems. Ecosystems, 10, 1220-1230.
http://dx.doi.org/10.1007/s10021-007-9089-9

[2]   Andersen, A. N. (1988). Immediate and Longer-Term Effects of Fire on Seed Predation by Ants in Sclerophyllous Vegetation in Southeastern Australia. Australian Journal of Ecology, 13, 285-293.
http://dx.doi.org/10.1111/j.1442-9993.1988.tb00976.x

[3]   Andersen, A. N., & Ashton, D. H. (1985). Rates of Seed Removal by Ants at Heath and Woodland Sites in Southeastern Australia. Australian Journal of Ecology, 10, 381-390.
http://dx.doi.org/10.1111/j.1442-9993.1985.tb00900.x

[4]   Ashton, D. H. (1956). Studies on Autecology of Eucalyptus regnans. PhD, Melbourne: University of Melbourne.

[5]   Ashton, D. H. (1979). Seed Harvesting by Ants in Forests of Eucalyptus-Regnans F Muell in Central Victoria. Australian Journal of Ecology, 4, 265-277.
http://dx.doi.org/10.1111/j.1442-9993.1979.tb01218.x

[6]   Burrows, N., Gardiner, G., Ward, S., & Robinson, A. (1990). Regeneration of Eucalyptus wandoo Following Fire. Australian Forestry, 53, 248-258.
http://dx.doi.org/10.1080/00049158.1990.10676084

[7]   Close, D. C., Ruthrof, K. X., Turner, S., Rokich, D. P., & Dixon, K. W. (2009). Ecophysiology of Species with Distinct Leaf Morphologies: Effects of Plastic and Shadecloth Tree Guards. Restoration Ecology, 17, 33-41.
http://dx.doi.org/10.1111/j.1526-100X.2007.00330.x

[8]   DeSantis, R. D., Hallgren, S. W., & Stahle, D. W. (2011). Drought and Fire Suppression Lead to Rapid Forest Composition Change in a Forest-Prairie Ecotone. Forest Ecology and Management, 261, 1833-1840.
http://dx.doi.org/10.1016/j.foreco.2011.02.006

[9]   Geist, C., & Galatowitsch, S. M. (1999). Reciprocal Model for Meeting Ecological and Human Needs in Restoration Projects. Conservation Biology, 13, 970-979.
http://dx.doi.org/10.1046/j.1523-1739.1999.98074.x

[10]   Gill, A. M. (1997). Eucalypts and Fires, Interdependent or Independent? In J. E. Williams, & J. C. Z. Woinarski (Eds.), Eucalypt Ecology: Individuals to Ecosystems (pp. 151-167). Melbourne: Cambridge University Press.

[11]   Grose, R. J. (1960). Effective Seed Supply for the Natural Regeneration of Eucalyptus delegatensis R. T. Baker syn. Eucalyptus gigantea Hook.f. APPITA, 13, 141-147.

[12]   Hatch, A. B. (1960). Ash Bed Effects in Western Australian Forest Soils. Bulletin of Forest Department of Western Australian, 64, 19.

[13]   Hobbs, R. J., & Yates, C. J. (2003). Impacts of Ecosystem Fragmentation on Plant Populations: Generalising the Idiosyncratic. Australian Journal of Botany, 51, 471-488.
http://dx.doi.org/10.1071/BT03037

[14]   Humphreys, F. R., & Lambert, M. J. (1965). An Examination of a Forest Site Which Has Exhibited the Ash Bed Effect. Australian Journal of Soil Research, 3, 81-94.
http://dx.doi.org/10.1071/SR9650081

[15]   Lamont, B. B., Lemaitre, D. C., Cowling, R. M., & Enright, N. J. (1991). Canopy Seed Storage in Woody-Plants. The Botanical Review, 57, 277-317.
http://dx.doi.org/10.1007/BF02858770

[16]   Loneragan, O. W., & Loneragan, J. F. (1964). Ash-Bed and Nutrients in the Growth of Seedlings of Karri (Eucalyptus diversicolor E.v.M.). Journal of the Royal Society of Western Australia, 47, 75-80.

[17]   Matusick, G., Ruthrof, K. X., & Hardy, G. (2012). Drought and Heat Triggers Sudden and Severe Dieback in a Dominant Mediterranean-Type Woodland Species. Open Journal of Forestry, 2, 183-186.
http://dx.doi.org/10.4236/ojf.2012.24022

[18]   McArthur, W. M., & Bettenay, E. (1974). The Development and Distribution of Soils on the Swan Coastal Plain, Western Australia. Publication No.16, CSIRO, Melbourne.

[19]   Ne’eman, G., Fotheringham, C. J., & Keeley, J. E. (1999). Patch to Landscape Patterns in Post Fire Recruitment of a Serotinous Conifer. Plant Ecology, 145, 235-242.
http://dx.doi.org/10.1023/A:1009869803192

[20]   Prober, S. M., & Smith, F. P. (2009). Enhancing Biodiversity Persistence in Intensively Used Agricultural Landscapes: A Synthesis of 30 Years of Research in the Western Australian Wheatbelt. Agriculture Ecosystems & Environment, 132, 173-191.
http://dx.doi.org/10.1016/j.agee.2009.04.005

[21]   Renbuss, M. A., Chilvers, G. A., & Pryor, L. D. (1973). Microbiology of an Ash-Bed. Proceedings of the Linnean Society of New South Wales, 97, 302-310.

[22]   Ruthrof, K. X. (2003). Seedling Survival, Growth and Health of Eucalyptus gomphocephala (Tuart) Seedlings in Yalgorup National Park. Botanic Gardens and Parks Authority, 12 p.

[23]   Ruthrof, K. X., Fontaine, J. B., Buizer, M., Matusick, G., McHenry, M. P., & Hardy, G. E. S. (2013a). Linking Restoration Outcomes with Mechanism: The Role of Site Preparation, Fertilisation and Revegetation Timing Relative to Soil Density and Water Content. Plant Ecology, 214, 987-998.
http://dx.doi.org/10.1007/s11258-013-0224-8

[24]   Ruthrof, K. X., Loneragan, W. A., & Yates, C. J. (2003). Comparative Population Dynamics of Eucalyptus cladocalyx in Its Native Habitat and as an Invasive Species in an Urban Bushland in South-Western Australia. Diversity and Distributions, 9, 469-483.
http://dx.doi.org/10.1046/j.1472-4642.2003.00040.x

[25]   Ruthrof, K. X., Renton, M., & Dixon, K. (2013b). Overcoming Restoration Thresholds and Increasing Revegetation Success for a Range of Canopy Species in a Degraded Urban Mediterranean-Type Woodland Ecosystem. Australian Journal of Botany, 61, 139-147.
http://dx.doi.org/10.1071/BT12297

[26]   Ruthrof, K. X., & Valentine, L. E. (2010). Ecological, Economic and Social Challenges, Restoration Filters and Planning for the Unknown. Australian Plant Conservation, 19, 34-35.

[27]   Ruthrof, K. X., Yates, C. J., & Loneragan, W. A. (2002). The Biology of Eucalyptus gomphocephala DC. (Tuart). In B. J. Keighery, & V. M. Longman (Eds.), Tuart (Eucalyptus gomphocephala) and Tuart Communities (pp. 108-122). Perth: Wildflower Society of Western Australia (Inc.).

[28]   Ryan, R. L., & Hamin, E. (2008). Wildfires, Communities, and Agencies: Stakeholders’ Perceptions of Post-Fire Forest Restoration and Rehabilitation. Journal of Forestry, 106, 370-379.

[29]   Standish, R. J., Fontaine, J. B., Harris, R. J., Stock, W. D., & Hobbs, R. J. (2012). Interactive Effects of Altered Rainfall and Simulated Nitrogen Deposition on Seedling Establishment in a Global Biodiversity Hotspot. Oikos, 121, 2014-2025.
http://dx.doi.org/10.1111/j.1600-0706.2012.20553.x

[30]   Tapias, R., Climent, J., Pardos, J. A., & Gil, L. (2004). Life Histories of Mediterranean Pines. Plant Ecology, 171, 53-68.
http://dx.doi.org/10.1023/B:VEGE.0000029383.72609.f0

[31]   TRG (2002). Status Report: Tuart Conservation and Protection. Tuart Response Group, Department of Conservation and Land Management.

[32]   Wellington, A. B., & Noble, I. R. (1985). Post-Fire Recruitment and Mortality in a Population of the Mallee Eucalyptus incrassata in Semi-Arid, South-Eastern Australia. Journal of Ecology, 73, 645-656.

[33]   Yates, C. J., & Hobbs, R. J. (1997). Temperate Eucalypt Woodlands: A Review of Their Status, Processes Threatening Their Persistence and Techniques for Restoration. Australian Journal of Botany, 45, 949-973.
http://dx.doi.org/10.1071/BT96091

[34]   Yates, C. J., Hobbs, R. J., & Atkins, I. (2000). Establishment of Perennial Shrub and Tree Species in Degraded Eucalyptus salmonophloia (Salmon gum) Remnant Woodlands: Effects of Restoration Treatments. Restoration Ecology, 8, 135-143.
http://dx.doi.org/10.1046/j.1526-100x.2000.80020.x

[35]   Yates, C. J., Hobbs, R. J., & Bell, R. W. (1994). Landscape-Scale Disturbances and Regeneration in Semi-Arid Woodlands of South Western Australia. Pacific Conservation Biology, 1, 214-221.

[36]   Yates, C. J., Taplin, R., Hobbs, R. J., & Bell, R. W. (1995). Factors Limiting the Recruitment of Eucalyptus salmonophloia in Remnant Woodlands. 2. Post-Dispersal Seed Predation and Soil Seed Reserves. Australian Journal of Botany, 43, 145-155.
http://dx.doi.org/10.1071/BT9950145

 
 
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