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Black summer bushfires caused extensive damage to estuarine wetlands in New South Wales, Australia

Black summer bushfires caused extensive damage to estuarine wetlands in New South Wales, Australia There is now considerable evidence that, as the climate continues to warm, bushfires are becoming more common and severe, particularly in regions such as south‐eastern Australia. The extraordinary Australian bushfires over the summer of 2019/2020 resulted in the burning of habitats such as highland peat swamps and intertidal estuarine wetlands over unprecedented spatial scales. Across New South Wales, these bushfires affected 183 ha of saltmarshes and 23 ha of mangroves in 19 estuaries. The percentage of fire‐affected saltmarsh ranged from 51% to 81% in the worst impacted estuaries, although typically ≤15% of mapped saltmarsh was damaged. Just over 50% of mangroves were burnt in Wonboyn Lake (although this constituted <0.2 ha), whereas in all other estuaries, ≤5% of mangroves were burnt. At the state‐wide scale, the likelihood of saltmarshes being affected by fire was unrelated to adjacent terrestrial vegetation; however, mangroves adjacent to burnt wet sclerophyll forest were more likely to burn than not. Burnt mangroves were almost exclusively associated with extreme or high severity fires in adjacent terrestrial vegetation, yet saltmarshes were also impacted in some cases by moderate or low‐intensity fires. Many species of saltmarsh plants had re‐sprouted or germinated after 6–24 months, but the extent of any recovery or changes in species composition were not quantified. The majority of fire‐affected mangrove trees appeared to be dead 24 months after the fires, despite observations of epicormic growth on some trees after six months. Bushfire impacts to estuarine wetlands are likely to become more frequent and results from our work can help target hazard reduction burning that might be considered for minimising damage to mangroves. More work is required to better understand potential longer term impacts and the capacity for natural recovery of estuarine wetlands from bushfires. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ecological Management & Restoration Wiley

Black summer bushfires caused extensive damage to estuarine wetlands in New South Wales, Australia

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Publisher
Wiley
Copyright
Copyright © 2023 Ecological Society of Australia and John Wiley & Sons Australia, Ltd
ISSN
1442-7001
eISSN
1442-8903
DOI
10.1111/emr.12572
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Abstract

There is now considerable evidence that, as the climate continues to warm, bushfires are becoming more common and severe, particularly in regions such as south‐eastern Australia. The extraordinary Australian bushfires over the summer of 2019/2020 resulted in the burning of habitats such as highland peat swamps and intertidal estuarine wetlands over unprecedented spatial scales. Across New South Wales, these bushfires affected 183 ha of saltmarshes and 23 ha of mangroves in 19 estuaries. The percentage of fire‐affected saltmarsh ranged from 51% to 81% in the worst impacted estuaries, although typically ≤15% of mapped saltmarsh was damaged. Just over 50% of mangroves were burnt in Wonboyn Lake (although this constituted <0.2 ha), whereas in all other estuaries, ≤5% of mangroves were burnt. At the state‐wide scale, the likelihood of saltmarshes being affected by fire was unrelated to adjacent terrestrial vegetation; however, mangroves adjacent to burnt wet sclerophyll forest were more likely to burn than not. Burnt mangroves were almost exclusively associated with extreme or high severity fires in adjacent terrestrial vegetation, yet saltmarshes were also impacted in some cases by moderate or low‐intensity fires. Many species of saltmarsh plants had re‐sprouted or germinated after 6–24 months, but the extent of any recovery or changes in species composition were not quantified. The majority of fire‐affected mangrove trees appeared to be dead 24 months after the fires, despite observations of epicormic growth on some trees after six months. Bushfire impacts to estuarine wetlands are likely to become more frequent and results from our work can help target hazard reduction burning that might be considered for minimising damage to mangroves. More work is required to better understand potential longer term impacts and the capacity for natural recovery of estuarine wetlands from bushfires.

Journal

Ecological Management & Restoration – Wiley

Published: Jan 1, 2023

Keywords: climate change; disturbance; fire; mangrove; saltmarsh; threatened species

References

  • Impact of anthropogenic climate change on wildfire across western US forests
    Abatzoglou, J. T.; Williams, A. P.
  • Australian saltmarshes
    Adam, P.
  • Saltmarshes in a time of change
    Adam, P.
  • Hurricane disturbance and recovery of energy balance, CO2 fluxes and canopy structure in a mangrove forest of the Florida Everglades
    Barr, J. G.; Engel, V.; Smith, T. J.; Fuentes, J. D.
  • Vegetation fires in the Anthropocene
    Bowman, D. M. J. S.; Kolden, C. A.; Abatzoglou, J. T.; Johnston, F. H.; Werf, G. R.; Flannigan, M.
  • The demography of the temperate mangrove Avicennia marina (Forsk.) Vierh. at its southern limit in New Zealand
    Burns, B. R.; Ogden, J.
  • Fitness benefits of serotiny in fire‐ and drought‐prone environments
    Causley, C. L.; Fowler, W. M.; Lamont, B. B.; He, T.
  • The population dynamics of the mangrove Avicennia marina; demographic synthesis and predictive modelling
    Clarke, P. J.
  • The intertidal distribution of the grey mangrove (Avicennia marina) in southeastern Australia: the effects of physical conditions, interspecific competition, and predation on propagule establishment and survival
    Clarke, P. J.; Myercough, P. J.
  • Resprouting as a key functional trait: how buds, protection and resources drive persistence after fire
    Clarke, P. J.; Lawes, M. J.; Midgley, J. J.
  • The 2019/2020 mega‐fires exposed Australian ecosystems to an unprecedented extent of high‐severity fire
    Collins, L.; Bradstock, R. A.; Clarke, H.; Clarke, M. F.; Nolan, R. H.; Penman, T. D.
  • Practical Non‐Parametric Statistics
    Conover, W. J.
  • Editorial: the 2019/20 black summer bushfires
    Davey, S. M.; Sarre, A.
  • Large‐ scale fire: creator and destroyer of secondary forests in western Indonesia
    Dennis, R.; Hoffmann, A.; Applegate, G.; Gemmingen, G.; Kartawinata, K.
  • Ecological consequences of Australia's “black summer” bushfires: managing for recovery
    Dickman, C. R.
  • Global trends in wildfire and its impacts: perceptions versus realities in a changing world
    Doerr, S. H.; Santín, C.
  • Australia's Mangroves. The Authoritive Guide to Australia's Mangrove Plants
    Duke, N. C.
  • Large‐scale dieback of mangroves in Australia's Gulf of Carpentaria: a severe ecosystem response, coincidental with an unusually extreme weather event
    Duke, N. C.; Kovacs, J. M.; Griffiths, A. D.
  • Amazon fires clearly linked to deforestation, scientists say
    Escobar, H.
  • Impact of Australia's catastrophic 2019/20 bushfire season on communities and environment. Retrospective analysis and current trends
    Filkov, A. I.; Ngo, T.; Matthews, S.; Telfer, S.; Penman, T. D.
  • Extent and effect of the 2019‐20 Australian bushfires on upland peat swamps in the Blue Mountains, NSW
    Fryirs, K. A.; Cowley, K. L.; Hejl, N.
  • High fire frequency and the impact of the 2019–2020 megafires on Australian plant diversity
    Gallagher, R. V.; Allen, S.; Mackenzie, B. D. E.
  • Intervals between prescribed fires in Australia: what intrinsic variation should apply?
    Gill, A. M.; McCarthy, M. A.
  • Implications of the 2019–2020 megafires for the biogeography and conservation of Australian vegetation
    Godfree, R. C.; Knerr, N.; Encinas‐Viso, F.
  • Deep history of wildfire in Australia
    Hill, R. S.; Jordan, G. J.
  • Evolution of the eucalypts – an interpretation from the macrofossil record
    Hill, R. S.; Beer, Y. K.; Hill, K. E.; Maciunas, E.; Tarran, M. I. A.; Wainman, C. C.
  • Post‐fire vegetation change and bird use of a salt marsh in coastal Argentina
    Isacch, J. P.; Holz, S.; Ricci, L.; Martínez, M. M.
  • Climate Change Increases the Risk of Wildfires
    Jones, M. W.; Smith, A. J. P.; Betts, R.; Canadell, J. G.; Prentice, I. C.; Le Quéré, C.
  • Fire‐driven extinction of plant populations: a synthesis of theory and review of evidence from Australian vegetation
    Keith, D. A.
  • Enhanced Australian carbon sink despite increased wildfire during the 21st century
    Kelley, D. I.; Harrison, S. P.
  • Decades‐scale vegetation change in burned and unburned alpine coniferous heath
    Kirkpatrick, J. B.; Bridle, K. L.; Dickinson, K. J. M.
  • Inundation characteristics of mangrove and saltmarsh in micro‐tidal estuaries
    Kumbier, K.; Hughes, M. G.; Rogers, K.; Woodroffe, C. D.
  • Recovery of small denuded patches of the dominant NSW coastal saltmarsh species (Sporobolus virginicus and Sarcocornia quinqueflora) and implications for restoration using donor sites
    Laegdsgaard, P.
  • Rapid losses of surface elevation following tree girdling and cutting in tropical mangroves
    Lang'at, J. K. S.; Kairo, J. G.; Mencuccini, M.
  • Determinants of the occurrence of unburnt forest patches: potential biotic refuges within a large, intense wildfire in South‐Eastern Australia
    Leonard, S. W. J.; Bennett, A. F.; Clarke, M. F.
  • Recent Australian wildfires made worse by logging and associated forest management
    Lindenmayer, D. B.; Kooyman, R. M.; Taylor, C.; Ward, M.; Watson, J. E. M.
  • An evaluation of the impact of Melaleuca quinquenervia invasion and management on plant community structure after fire
    Martin, M. R.; Tipping, P. W.; Reddy, K. R.; Madeira, P. T.; Fitzgerald, D.
  • Handbook of Biological Statistics
    McDonald, J. H.
  • Indigenous wetland burning: conserving natural and cultural resources in Australia's world heritage‐listed Kakadu National Park
    McGregor, S.; Lawson, V.; Christophersen, P.
  • Dispersal, establishment and survival of Ceriops tagal propagules in a north Australian mangrove forest
    McGuinness, K. A.
  • Impacts of cattle on the vegetation structure of mangroves
    Minchinton, T. E.; Shuttlewoth, H. T.; Lathlean, J. A.; McWilliam, R. A.; Daly, T. J.
  • The relationship between mangrove and saltmarsh communities in the Sydney region
    Mitchell, M. L.; Adam, P.
  • Impacts of marsh management on coastal‐marsh bird habitats
    Mitchell, L. R.; Gabrey, S.; Marra, P. P.; Erwin, R. M.
  • Fire in Wetlands: A Management Perspective. Proceedings of the Tall Timbers Ecology Conference, Number 19
    Nyman, J. A.; Chabreck, R. H.
  • Surface elevation dynamics in a regenerating mangrove forest at Homebush Bay, Australia
    Rogers, K.; Saintilan, N.; Cahoon, D.
  • The state of legislation and policy protecting Australia's mangrove and salt marsh and their ecosystem services
    Rogers, K.; Boon, P. I.; Branigan, S.
  • Macrofaunal loss and microhabitat destruction: the impact of trampling in a temperate mangrove forest, NSW Australia
    Ross, P. M.
  • Climate change and intertidal wetlands
    Ross, P. M.; Adam, P.
  • Impact of fire and the recovery of molluscs in south‐east Australian salt marsh
    Ross, P. M.; Harvey, K.; Vecchio, E. M.; Beckers, D.
  • Biogeography of Australian saltmarsh plants
    Saintilan, N.
  • The significance and vulnerability of Australian saltmarshes: implications for management in a changing climate
    Saintilan, N.; Rogers, K.
  • Mangrove transgression into saltmarsh environments in south‐East Australia
    Saintilan, N.; Williams, R. J.
  • Mangrove expansion and salt marsh decline at mangrove poleward limits
    Saintilan, N.; Wilson, N. C.; Rogers, K.; Rajkaran, A.; Krauss, K. W.
  • Dynamics of mangrove‐marsh ecotones in subtropical coastal wetlands: fire, sea‐level rise, and water levels
    Smith, T. J.; Foster, A. M.; Tiling‐Range, G.; Jones, J. W.
  • Fire regimes, fire ecology, and fire management in Mexico
    Trejo, D. A. R.
  • The potential of sentinel satellites for burnt area mapping and monitoring in The Congo Basin forests
    Verhegghen, A.; Eva, H.; Ceccherini, G.
  • General Technical Report SE‐17
    Wade, D.; Ewel, J.; Hofstetter, R.
  • Impact of 2019–2020 mega‐fires on Australian fauna habitat
    Ward, M.; Tulloch, A. I. T.; Radford, J. Q.
  • Interpreting long‐term patterns of seagrasses abundance: how seagrass variability is dependent on genus and estuary type
    West, G.; Glasby, T. M.