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I've been a Canberran since moving here from Adelaide on the first day of 1980. I now live in suburban Duffy with my partner Louise Maher, ABC 666 radio and on-line journalist. Among my early memories is following Sleepy Lizards (Shinglebacks) around the paddocks north of Adelaide, guarded by the faithful bull terrier. I have always been passionate about the natural world, trying to understand how it works, how the nature of Australia came to be, and sharing those understandings. My especial passions are birds, orchids and mammals. For much of my life I have been a full-time naturalist, running bush tours, writing books etc, doing consultancies, presenting a regular radio slot on local ABC, chairing a government environment advisory committee and running adult education classes. Recently I have eased back somewhat, but am still writing, teaching, doing some radio work and running overseas tours - as part of my fascination with our Gondwanan origins I've been running tours to South America for the past decade. I was awarded the Australian Plants Society Award in 2001 and the Australian Natural History Medallion in 2006, both for services to education and conservation.

Thursday, 23 March 2017

Bunya Mountains National Park; splendid isolation

Actually the Bunyas, in the hinterland of south-east Queensland, aren't really so isolated in terms of visiting them, but ecologically they represent a remnant of ancient Australia, rainforests left behind when the plains around them dried out, surviving in the cooler moister shelter of the ranges.
Subtropical rainforest creek line on one of the Bunya Mountains walking tracks.
The surrounding plains have been almost entirely cleared for agriculture but they were until relatively recently covered in dry Brigalow (Acacia harpophylla) forests and vine forest, or bottle tree scrub - as indeed the base of the Bunya Range still is. 
Bottle tree scrub, with Narow-leaved Bottletree Brachychiton rupestris.
The range is based on layers of basalt from volcanic eruptions, the most recent of which occurred 22 million years ago. While isolated it is functionally part of the Great Dividing Range, in that rain falling on the eastern slopes flows to the Pacific while water from the south-western slopes runs into the Condamine, and ultimately via the Balonne, Darling and Murray into the sea in South Australia.
Location of Bunya Mountains, 150km inland from the Sunshine Coast in south-east Queensland.
Famously the area was of enormous significance to indigenous people for the sporadic huge bounty supplied irregularly by the synchronised Bunya Pine seed production. It was a time when many peoples gathered and it was immensely important socially as well as economically; it's a story that's readily available and you can read accounts of it from people much more qualified than I am to tell it. Needless to say, tragically, those traditions were disrupted and then destroyed, not least due to the logging of the valuable timber resources of the range's forests. The last major gathering took place late in the 19th century; it seems to me that this underlines its importance, as much of the culture would already have been lost by then.

Europeans have been visiting the mountains for recreation since the 1860s, and in the 1880s a 12,000 hectare timber reserve was declared in an attempt to at least moderate the harvesting. In 1908 a 9,000 hectare national park was declared - this was the first major national park in Queensland (coming just months after the tiny Witch's Falls, now a section of the Tamborine National Park). Nonetheless logging continued for another decade or so! The park has since doubled in size to nearly 20,000 hectares and while logging has ceased, there are still conflicts from the proximity of residences and businesses high in the range on the park boundary - as these signs indicate.
These signs face each other across a narrow road - obviously enough,
the sign above is in the national park.
 

The subtropical rainforest, dominated in part by the mighty Bunya Pines Araucaria bidwillii, dominates the upper parts of the range (which rises to 1100 metres above sea level). The pines belong to one of the old Gondwanan conifer families, Araucariaceae; the species was named for John Bidwill, acting NSW Government Botanist and Director of the Botanic Gardens and later Commissioner of Crown Lands and chair of the Bench of Magistrates for the Wide Bay region of Queensland (then still part of New South Wales). He passed the material on to Sir William Hooker of Kew, who described the tree. 

Ancient emergent Bunya Pines; the dome-shaped canopy is diagnostic.
They are restricted to a few areas of south-east Queensland, plus a couple of small
relic populations far to the north in the tropics.


Bunya trunk; it has been claimed that the notches were cut by indigenous cone harvesters,
but it seems that this must remain just a good story. Inter alia, I'm sure those scars would have grown over
well before now; perhaps they represent former limbs.


The massive cone of the Bunya Pine (and a much younger bloke in a world where blogging
hadn't been dreamt of!). It is not wise to linger under the pines when cones are ripe!

Alongside the Bunyas grow the closely related Hoop Pines (though in theory they favour lower drier elevations). This species, A. cunninghamii (for the illustrious explorer-botanist Allan Cunningham), is much more widely distributed, found from northern New South Wales to New Guinea; it is also grown in timber plantations.
The very distinctive erectly ragged crown of Hoop Pines.

Clearly these Hoop Pines are growing in rainforest, complete with massive Bird's Nest Fern epiphytes.

Hoop Pine trunk, with the 'hoops' for which it was named.
Another significant difference from Bunya Pines is in the cones, which are tiny.
Like other subtropical forests this is a simpler forest than the tropical forests further north, but shares characteristics such as lianas, buttresses, epiphytes, strangler figs and many ferns, and is a lovely place to walk through; there is an excellent array of walks to choose from.
Bunya Pine-dominated forest.

An opening in the forest, with tree ferns and rapidly growing Giant Stinging Trees,
which specialise in colonising such clearings.

A tangle of fallen lianas.

An old, knotted liana.

A bank of ferns and cordylines.
Broad-leaved Palm Lily Cordyline petiolaris, above and below.
In the new lily taxonomy it is placed in the family Asparagaceae; it is found
throughout the near-coastal sub-tropics of Australia.
 


Leaf of Giant Stinging Tree Dendrocnide excelsa - it is literally a tree-sized stinging nettle, in the
family Urticaceae. You can see the stinging hairs around the chewed sections. The leaves always seem
to be nibbled, so the defences obviously only work against larger animals - but they certainly do work on me!
Buttresses on Churnwood Citronella moorei, family Cardiopteridaceae.
The Citronella was applied to a Chilean species; moorei for Charles Moore, NSW government botanist.
Strangler Fig Ficus watkinsiana; for more on stranglers, see here, but essentially they kill their host not
by strangulation but by shading them to death.
This one has a curious distribution in two isolated populations, one in northern New South Wales and south-east
Queensland, and one in tropical Queensland..

Cyathea cooperi, a tree fern, found along the eastern coast.
Unfortunately it has become an invasive weed in Hawaii and has invaded areas of southern Australia.
 Waterfalls feature on some of the walks.
Festoon Falls.

Paradise Falls; maybe a bit of hyperbole, but they are very pleasant!
Another favourite walk of mine in the Bunyas is the one up Mount Kiangarow, the highest point of the range (the walk actually starts high up and ascends very gradually). It starts in rainforest....


....but rapidly emerges into dry open forest, where a feature is the wealth of huge ancient grass trees, Xanthorrhoea glauca. They are certainly the largest of this species that I know, and only on Kangaroo Island have I seen others of similar size.
This magnificent specimen is at Burton's Well campground, at the start of the walk.

Avenue of grass trees along the track to the summit.


View from Mount Kiangarow, looking out over the park in the foreground and
the heavily cleared rich agricultural land of the Darling Downs beyond.
Another habitat which is of great interest in the Bunyas is the system of hilltop grasslands known as the balds. Their origin is unclear, though the presence of species restricted to them, including the locally endemic grass Bothriochloa bunyensis, strongly suggests they are natural. It is thought they are relics of the last glaciation; in recent times there has been considerable invasion of them by forest, which may be a product of global warming. Attempts are being made to counter this with use of fire.
Two views of some of the balds; there are well over a hundred of them along the ridges of the range.

Wildlife is rich, though I've not got a lot of photos - inter alia photography in rainforests is for those with better skills and equipment than I!
Carpet Python Morelia spilota, objecting at being asked not to lie on the road.
This is a scan of a slightly faded old slide from an early visit.
Red-necked Wallabies Macropus rufogriseus; along with some other animals they hang around
the visitor areas, but I prefer to show you slightly wilder ones where possible!
Brush Turkey Alectura lathami, another which has no problems making a living from visitors.
A mound-builder, which incubates its eggs in a huge pile of managed compost.
Male Superb Fairy-wren Malurus superbus. One of the most abundant and familiar birds in south-eastern Australia, but one more photo is never quite enough...
Female Paradise Riflebird Ptiloris paradiseus, one of three closely-related birds of paradise from
eastern Australian rainforests. An awful photo (again a scan of an old slide) but a special bird.
Juvenile (and wet!) Green Catbird Ailuroedus crassirostris; the two Australian catbirds are
relatively primitive bowerbirds which don't build display bowers, and which yowl loudly like cats
or crying babies, quite disconcertingly if you don't know them!

Topknot Pigeons Lopholaimus antarcticus, preening high in a Bunya Pine.
This big strange-looking fruit pigeon has no close relatives.
White-browed Scrubwren Sericornis frontalis. This active little group of birds had me fooled for a while -
I took them to be Yellow-throated Scrubwrens, but they are particularly yellow examples of the Queensland
race laevigaster. (If you're still wondering, the pale iris and distinctive white 'whiskers' are giveaways.)
 
And lastly this intriguing little character, twirling apparently contentedly at the end of a silken thread.
If you've not been to the Bunyas yet - or even if it's just been too long since you were there - take a detour when next you're in the vicinity, or even make a special trip! You won't be sorry.

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3 comments:

Susan said...

I love the Bunyas. The cat birds and satin bower birds are quite happy to supplement their diet by picking over your vehicle bumper bars and grill for insects. No need to feed. I was interested by the opposing bird feeding signs. I bet that causes some bad feeling on both sides. And I had no idea the tree fern was an invasive alien in some places!

Kath H said...

I can only echo Susan's comments about the signs and the tree fern being an invader. I have a photo of that enormous grass tree at Burton's Well, taken in 2011 when there was a huge dust storm. It dwarfed the trip leader (John Sinclair) standing under it, and was in full flower. Amazing plant . I wonder how old it is. It would certainly have seen many changes during its lifetime. Fascinating area.

Ian Fraser said...

Glad this brought back good memories for you both. Yes, I'd have been amused to watch when the parks sign went up - I'm only assuming that was the order in which they appeared of course. I'm assuming too that the biggest grass trees are centuries old, but without growth rings (they're not solid wood inside of course) I don't know how you'd find out. I only learnt about the Cyatheas being invasive weeds in Hawaii yesterday too... I was aware that some had 'escaped' round some southern capitals, but I doubt that they're doing much harm.