Tag Archives: ecology

New artwork: Fishes of the Fleurieu Coast

30 Saturday Dec 2017

Posted by in art & craft, ecology, exploring

≈ 1 Comment

Tags

, , , , , , , , , , ,

IMG_9852

One of the most spectacular elements of the Fleurieu Coast is the proximity of its rolling hills and forested highlands to beaches, reefs and towering rocky cliffs. A few kilometres down the road from Yarnauwi is Second Valley, and beyond that Rapid Bay, both renowned dive locations and in Second Valley’s case, periodically voted as one of the “best beaches” in South Australia and Australia. This new lino print is a tribute to some of the many fish that make their homes among the caves and kelp forests of this region.

Each fish was individually carved and is hand-printed in acid-free, fade-resistant dye ink on Canson cartridge paper. The finished print includes a list of all of the fish depicted hand-written in pencil. The prints are now available online at our Etsy shop.

IMG_9857

Print detail, showing an Old Wife and Southern Sea Garfish.

DSCN0970

Treading water off the Second Valley Jetty during ‘research’ for this print

New poster: Imagining Yarnauwi before colonisation

13 Thursday Jul 2017

Posted by in art & craft, ecology, history, regeneration, trees, waterways

≈ 2 Comments

Tags

, , , , , , , , , , , , , , , ,

Click to view a printable, A3 version of the poster.

Over the last few years, we’ve spent a great deal of time learning about the landscape of Yarnauwi, and the broader southwestern Fleurieu Peninsula. This has been essential for us in helping us to understand how the landscape works, and therefore how we can best work to ensure its health and function. We’re inspired by a statement from the 2015 Greenhorns New Farmer’s Almanac, where Connor Stedman writes, “Farms, forests, and grasslands can store and regenerate natural capital again, rebuilding the ecological fabric that is the ultimate source of our prosperity and survival. But to know how to undertake that stewardship, it’s not enough to know the land as it is now. We need to dig below the recent surface and go deeper – find the older ecological and cultural stories of a place. It’s the wildlands that hold these stories, and it’s these lands that will return them to us if we know where to look and how to listen. An agrarian economy needs to tend, restore and engage in a deep relationship with the wild as well as the planted field.”

In this spirit, in this poster we’ve tried to imagine and illustrate the landscape of Yarnauwi and the surrounding area as it may’ve appeared before colonisation. It summarises our reading and research, as well as our experiences exploring more intact local landscapes. It’s a work of imagination, it’s definitely not to scale, but we hope it helps communicate some of the complexity of a functioning landscape and the interactions of the Kaurna in maintaining its function and ecological health over millennia. Then, as now, the southwestern Fleurieu was a cultural landscape, maintained through intentional management practices. This poster is also an effort to acknowledge our own place in the long history of this landscape. Continue reading →

Time and change: revegetation inspiration

10 Monday Jul 2017

Posted by in ecology, regeneration, trees

≈ Leave a comment

Tags

, , , , , , , , , ,

Impatient as we are, we’ve become slightly obsessive about “before-and-after” photos in an effort to stay inspired about the possibilities for landscape transformation. About 15 minutes down the road from Yarnauwi, our friends David and Gillian have been gradually revegetating a former grazing property in the hills above Cape Jervis. Perhaps because of its steepness, the property has retained a good number of big old pink gums, together with the occasional ancient sheoak, offering the beginnings of a canopy for regeneration. Seven years ago we helped out with one of their first planting weekends, and I recently unearthed some photos taken at that time. With David, we recently walked around the property to admire the last seven years of growth.

View 1: 2010

View 1: 2017

David and Gillian have been philosophical about kangaroo grazing, with plants getting no more protection than korflute guards. Some plants have been repeatedly mowed down, reaching no higher than the tree guard after seven years, while others have finally stretched above mouth height and are now heading skywards. David notes that no plants were about adult should height for the first five years – something we can relate to at Yarnauwi. Continue reading →

Yarnauwi Annual Report 2016

29 Thursday Dec 2016

Posted by in ecology, planning, regeneration

≈ 9 Comments

Tags

, , , , , , , , , , , , , , , , ,

img_7646

In birthday cards I often wish the recipient a coming year of “the right kind of challenge”, optimistically suggesting it will herald positive growth and empowerment through problem-solving and negotiation. This year, I got a taste of my own medicine, with a winter of biblical proportions just the beginning of the challenges.

November marks four years since we began the Yarnauwi project. Four years of attempting to regenerate the property to our optimistic standards on the weekends, of packing and unpacking the car, of ferrying and entertaining one, then two, small children, of revegetating, managing erosion, managing pasture, managing water, managing livestock, managing weeds and managing the legacy of past land managers. These are all admirable, ambitious intentions, and what we’ve achieved has only been possible through the support and enthusiasm of our community of neighbours, friends and family. Continue reading →

The Wet Season 2016

06 Sunday Nov 2016

Posted by in ecology, livestock, trees, waterways

≈ 6 Comments

Tags

, , , , , , , , , , , , , , , ,

The first big storm saw the dam fill and rivers broaden to ten times their normal size for an afternoon. A neighbour’s creek crossing dissolved in the flow, the rock and rubble broadcast along the river bottom. The second big storm saw our rainwater tank, still awaiting a shed to fill it, lifted vertically from its nest of stardroppers, vaulting a tractor and four or five fences before being swept off in the swollen waters of the Anacotilla River, carried across two properties and wedged under a red gum. The third storm came with days of warnings, threats of winds over 120km/h and rainfall to rival all of the previous deluges. It left all of South Australia without electricity, the farm a sucking, gurgling swamp, and me walking home through a darkened, scrambling city.

img_8290

Mist in the valleys

It’s been a demanding few months on the farm. The persistent moisture has made the ground unworkable, most of the farm inaccessible except on foot and the weather generally hostile to both our motivation and ability to do anything useful. The vast quantities of rain we’ve received however, have meant that moisture has permeated deep into the subsoil, so we console ourselves with the hope that as the weather warms, our tree plantings (including those from earlier this winter) will rocket skywards. Continue reading →

Winter and the One Rock Dams: erosion control after the rain

24 Sunday Jul 2016

Posted by in ecology, planning, regeneration, waterways

≈ 4 Comments

Tags

, , , , , , , , , , , , ,

IMG_8265

Rain, and a full dam.

By late July this year we’ve already exceeded our entire rainfall for 2015, and for now, the rain shows no signs of abating. This is fantastic news for our revegetation efforts, and our dam is now almost full for the first time in two years. With heavy rains – we managed to top 100mm (4 inches) in a single day – it’s also a chance to test the effectiveness of the erosion control strategies we’ve employed.

With significant erosion in some key areas of the property, we’ve worked to adapt erosion control strategies such as those practised by Bill Zeedyk and Craig Sponholtz (see April’s Waterway Restoration workshop/working bee and our Resources page for more information). In particular, we’ve constructed Zuni bowls, for arresting headcuts, and One Rock Dams, to slow water flow, catch sediment and gradually lift the floor of erosion gullies. After the recent deluge, we toured the works to see how we went. The Zuni bowls have had mixed success: those in relative stable locations have been effective, those in dispersive soils have been unpredictable. The One Rock Dams (ORDs) have been generally successful, if swamped by sediment!

The impact of 100mm of rain in one day is significant: exposed areas lose significant amounts of soil (some areas of gully floor had almost 30cm of freshly deposited sediment), and areas of dispersive soil go berserk, collapsing in all directions. For some of these areas, we’re continually seeking further advice, but for those we can manage, we monitor and tweak over time, and try to “let the water do the work” in healing the landscape.

Continue reading →

Matching trees to tricky spots

25 Saturday Jun 2016

Posted by in ecology, planning, propagation, regeneration, trees

≈ Leave a comment

Tags

, , , , , , , , , , ,

IMG_7914

Eucalyptus occidentalis, a hardy, salinity and waterlogging tolerant timber and bee forage WA species, putting on new growth despite a dry year.

For the first couple of years of tree planting, we adopted a pretty haphazard approach, planting a bit of everything everywhere, and waiting to see what would stick. It took only a couple of months to highlight which areas offered the conditions for revegetation at a respectable pace, and which did not. Some patches only appeared to support certain species, others seemed to support nothing at all. The challenge has been to work out why. For enthusiastic amateurs like us, the working out comes through plenty of observation, plenty of reading and plenty of research.

IMG_7870

One persistently hostile area of the farm offers saline, slaking, seasonally waterlogged clay with tunneling and cracks you could lose a child down.

For some areas on our farm, vegetation is a valuable indicator, plants like sea barley grass (Hordeum marinum) suggests mild salinity, and, in our case, seasonal waterlogging. In others, aspect and soil type present challenges. Three years of tree planting and walks through local bushland have also given us a sense of which local species might suit which locations. We keep trying new configurations in the same places, and also try to mimic the natural process of succession by planting hardy pioneers first, then waiting for them to establish shelter and canopy before adding others. As the balance of the landscape has changed through clearing, cultivation and the associated effects of erosion, shifting water tables and changes in nutrients and soil biology, many of the species that may have dominated a couple of centuries ago no longer tolerate certain areas of the block. Likewise, some areas that may have been conducive to vegetation when woodland was already present, once cleared, they seem to be hostile to its re-establishment: for example, a north-facing corridor of grey, cracking clay that has resisted our affections for two years now. Continue reading →

The Fourth Annual Tree Planting Extravaganza!

20 Monday Jun 2016

Posted by in ecology, events, planning, regeneration, trees

≈ 5 Comments

Tags

, , , , , , , , , ,

IMG_8069

Reforesting the Fleurieu, one tree(guard) at a time.

Over the June long weekend, once again our loyal crew of tree-planters descended on Yarnauwi for the fourth year of tree planting. This year we planted 600 plants, local species associated with pink and red gum woodlands.

IMG_8095

The 2016 Crew

After 3 years of planting, many patches of seedlings are now well established, and on rainfall only they’re slowly growing into the landscape. Our mission for this year was to fill in some unplanted spaces, trace windbreaks and corridors between islands of vegetation, replant tricky spots with specially selected vegetation and to expand some of our successful woodlots. Spots that we cleared junk from earlier in the year were planted out, and areas of erosion control will also be planted with sedges and reeds this season. Continue reading →

Winter active

31 Tuesday May 2016

Posted by in diy, ecology, regeneration, trees

≈ 1 Comment

Tags

, , , , , , , , , , , , , ,

IMG_7962

Blue gum (Eucalyptus leucoxylon) seedlings ready for planting.

Before Yarnauwi, we never really appreciated winter. Now, through the long dry season, we find ourselves yearning for a chill edge to the wind, the moisture in the grass, and skies of dark clouds. We’ve tried to plan our year to mimic the lives of so many of the organisms that occupy our landscape: in the hot, dry times, we go into maintenance mode, watching and waiting for the first rains before we spring into action again. With the greening of the landscape, it’s all on: tree-planting has begun, shed sites are levelled, the grass grows. In winter, the kangaroos converge in clans numbering hundreds, displaced from the pasture, they lounge among the seedlings in the reveg areas while we look on nervously.

IMG_7925

Joel and Annika work on a rock dam to arrest erosion on a boundary before the rains hit.

IMG_8018

And then the rains hit.

Continue reading →

Waterway restoration at Yarnauwi

20 Wednesday Apr 2016

Posted by in ecology, events, regeneration, waterways

≈ 3 Comments

Tags

, , , , , , , , , ,

In April, we belatedly participated in Clean Up Australia Day, focussing our attentions on the final lode of rubbish in the gullies and constructing erosion control structures in areas of active erosion. Kitted out in dust-masks and gloves, our amazing team of volunteers completed in an hour what it would take us weeks to do alone, and by day’s end had removed six trailer-loads of steel, and about 20 sacks of rubbish, together with miscellaneous sun umbrellas, fitness treadmills and bmx frames. (See our Curated Junk page for similar treasures – undoubtedly there are more to come!)

IMG_7730

Continue reading →