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Holding back the tide

14/10/2025

9 Comments

 
Picture
Is it time to let nature prevail at Queensferry? Photo: The Powell Family, 2025.
By Neil Daly

QUEENSFERRY, Tuesday 9 September, 2025.

The dawn sun was hidden by the menacing dark clouds.

The tide was out.
​
RMIT’s Centre for Nature Positive Solutions (CNPS) project team emerged from their dual cab ute – they were here to count mangroves.

By about 7.45am they were half way through counting, measuring and inspecting the remaining mangroves from the Blue Carbon project first started in October 2022 and now approaching its conclusion.   The scene was reminiscent of my first meeting with the team as I recorded in A chance encounter of the seedling kind. ​
Picture
Counting mangroves before the tide rolls in, Queensferry, 2025. Photos: Neil Daly
While they were still hard at work and the cloud cover persisted, I headed to the Landcare/Bunurong mangrove project at the eastern end of Queensferry.

In January this year, the project team deployed 800 bamboo brush structures ($9 each), planted 3800 mangrove seeds using the John Eddy method and scattered the remaining 2500 seeds within the two plots.
Picture
From my “visual count”, about half the planted mangroves were surviving.  It seems the bamboo structures are providing some protection against the waves and sand is accumulating in and around the plots. 

There was no evidence that the scattered seeds had survived; 60 or so of the brush structures had washed away.

As I headed back to the western end of Queensferry, I took in the vista and recalled conversations I’d had over the last four years or so with those who regularly walk along this foreshore.

In some cases, they are not happy with the “scientific meddlers” traipsing through the inshore intertidal zone planting mangroves and churning up the sediment.  They point out that the mangroves are simply not growing and its time people stopped interfering with Queensferry’s natural order and left it alone.

Deep in thought, I was suddenly brought back to reality with “Morning”, ending my early morning solitude.

It was Dr Stacey Trevathan-Tackett, the CNPS team leader.  Taking a break from the counting activities, Stacey was happy to report on some aspects of the project to date.

The Nature Positive Solutions program had two overarching aims:
  • researching and developing (i.e. trial and error) new ways to improve plant establishment in areas of the coastline that are struggling to revegetate on their own; and
  • connecting and working with practitioners, other researchers, landowners and community to progress the common goal of coastal wetland restoration.

Over a two-year period, the team had deployed 60 BESE biodegradable lattice frames and collected some 2500 mangrove seeds.  They embedded some seeds in the frames while others were planted using the John Eddy bamboo stake method. 
Picture
Very few mangroves have taken hold since December 2022.
In October 2023, a further 380, nine-month-old seedlings grown in a land-based nursery were planted in modified frames to test if these seedlings could survive the rigours of a sometimes hostile environment.

“We’ve worked in Western Port and Port Phillip Bay in some very diverse environments and have learned a lot about how biodegradable structures can facilitate seed and seedling growth,” Stacey said. “Not surprisingly, what works in one area may not work in another.”

It was now around 9.15am. With the tide on its return journey, the team’s gear loaded into the ute and the mangrove data safely recorded for analysis (their report will be released soon), it was time to call it a day. 

It had been an interesting morning.  However, given Queensferry’s environmental history, it seemed the situation was far from being resolved.

Queensferry is a low-lying environment. After it was inundated in the 1920s, what remained of the township was abandoned.

In all likelihood the tidal flooding will continue. Even after 25 years of trying to grow mangroves where they once stood prior to the township being established in the 1880s, it seems hand-planted mangroves cannot be grown in sufficient numbers to temper the wave action.  The foreshore is eroding at about a metre per year.

The question arises: is what’s left of Queensferry’s infrastructure in need of ongoing protection, or is it time to move on and let nature prevail?

I imagine the landholders will hold on to their marginal land; those undertaking the mangrove projects will want to keep going; some of the locals will continue to express their environmental concerns; and the erosion will go on.

Given the competing interests, I thought it was time I sought a “second opinion”. In an ABC News program Australia's coastal towns are facing major erosion, coastal geomorphologist Professor David Kennedy offered the following view.

"Because coasts naturally erode … the real time when we want to see human intervention is really when we get a situation where we have some sort of human asset, which we can't move." Professor Kennedy said the best solution would be for people not to build infrastructure on the coast and to move further away from beaches to minimise the impact of erosion.

"If we keep maintaining our assets where we exactly want them to be, erosion will get worse into the future, if we don't allow that coast to have that manoeuvrability that it wants to do."

On reflection then, has the time come to leave Queensferry alone and let the ghosts of the past rest in peace or do we plough on?

Somebody has to make the call.
9 Comments
Anne Heath Mennell
17/10/2025 04:22:04 pm

Thank you, Neil, for this thoughtful update. It will be interesting to see what the CNPS team's report recommends ...

Keep us posted.

Reply
Joy Button
17/10/2025 10:23:16 pm

Thank you Neil for another very informative article about the mangroves. I am aware of the hours that you and other volunteers have spent in planting out the mangroves. I am also aware of the hours that you spend increasing your knowledge and expertise regarding planting out the mangroves so that they survive.
You are an absolute legend and I do love to hear your articles which are so knowledgeable and keeps the community up to date and well informed on such an important topic.
Thank you Neil!!

Reply
Anne Caulfield
19/10/2025 06:45:22 am

Since the 1990, when Dr Tim Ealey OAM was growing mangroves in milk cartons and enlisting the assistance of our local school children to address the diminishing Mangroves! A lot of effort has been employed, more recently by Neil and Jason! Hoping with the latest interest, some progress will be made with the much needed coastal protection of Mangroves!

Reply
Michelle SMITH
19/10/2025 07:47:45 am

Thank you Neil.... A most thought provoking and interesting review . I too am on 'the fence' but the rate of erosion of one metre a year still amazes me.
Your witing and reviews are always so well written!

Reply
Jeff Nottle
19/10/2025 10:12:00 am

Thanks Neil. Excellent article that opens interesting discussions.
With climate change and increasing water levels "somewhere" has to be inundated to help give the coast the "manoeuvrability" referred to by Professor Kennedy.

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Neil Daly
19/10/2025 11:53:55 am

Thanks Jeff. It would seem places like Warneet, Tooradin, Grantville and Silverleaves are also in the ‘manoeuvrability firing line’. It looks like these communities are in for some interesting times and the “Somebody” will have to get moving.

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Connie Platt
21/10/2025 05:54:36 pm

This was a good read; Nice to know that there are good people, trying to make a difference,

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Meryl Tobin link
24/10/2025 11:15:08 pm

Thanks for outlining the situation, Neil. Sounds like a dilemma. While I appreciate the idea of Nature doing what it wants, when [some] humans have interfered with the natural order of things to the extent they have, it is sometimes hard to know what is natural. Wendy Ealey in her tribute to her late father Tim Ealey, Tim Ealey––Dr Mangrove, says, “… he says that the planet will recover one day when we’re all extinct and well out of the way. In the meantime, he does the few things that he can to counteract the ravages and greed of man.” Put another way, [some] humans are stuffing things up and when humans have made themselves extinct, Nature will do what it can with what’s left. Pity Tim’s not around to give what would have been an informed assessment on the matter of Queensferry.

Reply
Neil Daly
27/10/2025 05:31:27 pm


A reader of the Bass Coast Post responding to this story has sent me a link to the “CoastAdapt” website. See: https://coastadapt.com.au/

“CoastAdapt is an information delivery and decision support framework. It is for anyone with an interest in Australia’s coast, the risks it faces from climate change and sea-level rise, and what can be done to respond to those risks.”

For example, under the heading “CoastAdapt datasets: future”, you can access the “Sea-level rise and future climate information for coastal councils”. See: https://coastadapt.com.au/sea-level-rise-information-all-australian-coastal-councils

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