Black Summer bushfire BioBlitz in NSW finds species bouncing back better than other regions

26 May 2022

Published by: https://www.abc.net.au

AUSTRALIA – Harnessing the power of citizen scientists, a UNSW project researching biodiversity in areas damaged during the Black Summer bushfires has found positive signs of life bouncing back.

Three recent ‘BioBlitz’ events held in different locations around NSW have recorded the post-bushfire recovery of flora, fauna and fungi, and found the Mid North Coast is faring particularly well.

BioBlitz is a research tool dating to the mid-1990s, in which citizen scientists set out to document as many different species as they can across a defined time period and geographical location.

The latest BioBlitz through Laurieton, North Haven and Diamond Head, near Port Macquarie has seen 2,200 individual observations submitted to the research database, with 823 species recorded, including nine threatened species.

Thomas Mesaglio, iNaturalist curator and PhD candidate at the UNSW Evolution & Ecology Research Centre, said the Laurieton BioBlitz saw “easily the most species observed out of the three BioBlitzes held”.

“The third blitz was initially meant to be held at Washpool National Park, north-west of Grafton, but right before it was meant to go ahead catastrophic flooding hit the area, so the team scrambled to reorganise the event,” he said.

The Laurieton area was chosen because it had a “really nice mosaic of burnt and unburnt areas right next to each other” and despite less people getting involved than the two previous events, a significantly higher number of species were found.

“We couldn’t have picked a better place,” Mr Mesaglio said.

“It was an absolutely fantastic location for the BioBlitz with the amazing range of species we saw.

Nine threatened species were found in the Mid North Coast area alone, including wallum rocket frogs and wallum froglets, greater gliders, square-tailed kites, and rare plants such as the Northern Brother wattle (Acacia courtii) and flowering shrub (Persoonia katerae).

Previous events were held in March at Murramarang National Park on the NSW south coast and in February in the Blue Mountains, but as those areas suffered more intense and extensive damage, not as many species appeared to be bouncing back.

Each of the events ran over three days, with techniques employed such as spotlighting, insect trapping, sound recordings, and surveying of plants, mammals and reptiles.

Citizen scientists crucial for bushfire research

BioBlitzes are proving to be a highly useful tool for scientists to research the prevalence of different species across a large area.

Mr Mesaglio said citizen scientists had emerged as an invaluable asset for bushfire recovery research in terms of finding out which species were coming back.

“When you have fires hitting it’s really difficult for scientists to be able to go out and visit all the areas that burnt in a relatively short period of time,” he said.

“By mobilising citizen scientists and getting the community engaged in these kinds of events we can cover lots of places in a shorter period of time.”

Bringing the citizen scientists together with experts and researchers also allowed them to impart knowledge to community participants.

Mr Mesaglio said it was particularly fascinating to examine the impact recent heavy rainfall has had on wildlife.

“We found the influence of rain and water has been really crucial for recovering some of these areas, for example in the Diamond Head are you have fantastic paperbark swamps, and there was incredible diversity there,” he said.

“It seems like these swamps played a really important role during the fires, acting as little refugia for species that may have been trapped in the fires, for them to escape to.”

Several Australian universities have combined efforts on researching bushfire behaviour and its impact on the natural environment, and as a result the recent BioBlitz events have built on the shared knowledge.

“We’ve got all the people who came to the BioBlitzes uploading their photos and all of our experts feverishly identifying things for everyone and putting forward the final tallies, and then we’ll put together a report with all our findings.”