Friends of Trigg Bushland Inc.
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Friends of Trigg Bushland Inc. Tuart Project – preliminary report September 2009. Trigg Bushland is comprised of three main areas, bisected by major roads, with very different soil and vegetation in each area.

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Friends of Trigg Bushland Inc.

Tuart Project – preliminary report

September 2009


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Trigg Bushland is comprised of three main areas, bisected by major roads, with very different soil and vegetation in each area.


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The ‘Tuart Atlas’ recognised very few trees in Trigg Bushland – but we knew this was not correct.


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There were huge, stately tuart trees…. Bushland – but we knew this was not correct.


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…as well as many-trunked tuarts – almost mallees…. Bushland – but we knew this was not correct.


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…and there many, many dead trees, usually fire damaged… Bushland – but we knew this was not correct.



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Our tuart project seedlings and juveniles !

Signboard in Trigg Bushland

Website

Tuart mapping


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Signboard in Trigg Bushland seedlings and juveniles !


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Website seedlings and juveniles !

…find us at www.triggbushland.org.au


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Tuart mapping seedlings and juveniles !

9 people at various times, surveying in pairs

All amateurs

Have received some assistance from secondary school students – particularly Hale School Duke of Edinburgh programme participants

Used own equipment


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GPS seedlings and juveniles !

Digital camera

Map

Data collection sheet




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Details of each tree are taken by hand… use of special software…





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What have we learned? species…

Surprising number of tuarts

Surprising number of young trees

Generally healthy condition of tuarts

Most damage appears fire related

‘Middle aged and older’ tuarts missing – there are few large and old trees, and few trees ‘middle aged’ trees staged to take their place


All tuarts in duart arnott shown in green 1099 l.jpg
All tuarts in Duart Arnott – shown species…in green –1099



Plus juvenile tuarts in duart arnott shown in blue 304 l.jpg
Plus juvenile tuarts in Duart Arnott – species…shown inblue– 304


Plus seedling tuarts in duart arnott shown in red 128 l.jpg
Plus seedling tuarts in Duart Arnott – species…shown in red –128


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Tuarts in Duart Arnott by metre of height species…

Most of the tuarts in this part of Trigg Bushland are very small – under 3 metres. There are very few large tuarts.


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Tuarts in Duart Arnott by metre of height species…

It is likely that the majority of tuarts in Duart Arnott have grown since the last major fire.


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Tuarts in Duart Arnott by metre of height species…

If another major fire were to occur, it is likely that only a few large, old tuarts would survive.


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Tuarts in Duart Arnott by metre of height species…

Reducing the frequency of fire is critical to maintaining a viable tuart population, as tuarts do not have a persistent seedbank in the soil.


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How have our recommendations on management strategy changed? species…

No need to plant trees – Trigg Bushland can regenerate by itself in most areas at present

Protection of existing population – juvenile trees as well as mature trees - is first priority

Fire control probably most important threat to address

Secondary threats may be fungal (Phytophthera, Armillaria)


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Issues coming out of discussions with DEC and THRG/Centre for Excellence for Forest Health:

Completion of survey and analysis of data is required to draw final conclusions

Fire history mapping

Fire plan and liaison with CoS / FESA / local residents

Seed collection and secure storage

Inoculation of remaining mature trees to promote their seed-bearing life while next generation becomes fire-hardy


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Come join us! for Excellence for Forest Health: