Sheldon Forest Track – OFF Field day

OFF Field Day on Tuesday 15 August will be on Sheldon Forest Track, a 5-6 km walk from Turramurra Station through tall forest bordering Avon Creek and returning along Pymble streets.  This is not a long walk but includes steep streets and an uneven track with many stone steps descending to a running stream and back up again.  The track passes through majestic forest which transitions from Sydney Blue Gum through Blackbutt to Turpentine and thence Coachwood.  The main attractions are the changing vegetation, birdlife and peacefulness – it will be an opportunity for photography and ‘forest bathing’, so a leisurely pace is recommended.

Travel in 2nd last carriage departing Oatley Station at 8.45 am; 9.27 am train from Town Hall arriving Turramurra at 10.04 am.

Bring something for a late morning tea/early lunch along the track.  Back at Turramurra Station by about 2 pm.  Leader: Liz Cameron 9580 6621; elsmere02@gmail.com 

For more information and map see – Ku-ring-gai Council – Sheldon Forest Track:

Forest bathing:  https://en.wikipedia.org/wiki/Forest_bathing

Holding Back the Concrete – Dorothy Luther

HOLDING BACK THE CONCRETE – URBAN BUSH PROJECTS
DOROTHY LUTHER – OATLEY RSL 26 MAY AT 7:30PM

Inner Sydney is fast becoming a concrete jungle, with high rise apartments & shopping centres driving out the houses & corner shops that formed local communities. Even the remaining houses are being gentrified, with high walls hiding buxus hedges & garden furniture. Trees and gardens are disappearing because they’re untidy & take too much work.

But some intrepid souls are fighting back – a small but determined army of bush carers, community groups & feral gardeners are trying to stem the tide, with support from local governments – also under threat. They’re creating bush pockets, rain gardens, walking & cycle tracks that enable us to still keep in touch with nature & watch the antics of birds & lizards.
This is the story of some of those groups.

BIO
Dorothy Luther says she has been a member of APSoc for about 20 years, since buying an inner suburban house that needed a bush garden. She has been through the struggles of indigenous vs what will grow and has killed many plants in the process. This has led to many discussions with community gardening groups in the area. She is currently investigating rain forest plants since they seem to grow best in the much modified habitat. Her love of plants comes from growing up in the bush, not from any formal studies & botanical names are still confusing.


 
 

Living Rivers -Swimmable Urban Rivers

170227StuartKhanFor our first meeting of 2017, 60 members and guests welcomed Associate Professor Stuart Khan from UNSW School of Civil & Environmental Engineering to the podium. Stuart informed us of the current plan to ‘Make Parramatta River Swimmable Again by 2025’ which has been entrusted to the Parramatta River Catchment Group – an amalgam of River Councils, Sydney Water, Dept of Planning and the EPA.

There are currently swimming baths and beaches along the river that had been used historically (and still are) but, being a working river with a legacy of highly polluting industries along its shores, the quality of the water is dubious. Water testing over the years has revealed many and varied toxins suspended in the water column and, more worryingly, present in high densities in the sediment. Among many dirty industries Union Carbide had a large factory producing chemicals used during the Vietnam War and the resultant dioxins have entered the river and accumulated in the food chain. It is recommended that fish caught west of the Harbour Bridge not to be eaten. Industries generally do not discharge into the river anymore and there are heavy fines for doing so. However, some factories now discharge into the sewer and pay Sydney Water via a licence for the privilege.

Treatment of effluent is carried out at the ocean-end of the sewage carriers and that can prove problematic during a rain event. Stormwater enters the sewer and during heavy rain the overburdened pipes release untreated effluent directly into the creeks and river. In conclusion, swimming in the Parramatta River may well be feasible BUT unless a massive upgrade of the sewerage system is implemented then the current discharges of pollutants into the catchment during rain events will regretfully render the river risky for regular recreational revival.

CLICK HERE FOR A Pdf COPY OF THE SLIDE PRESENTATION

Members were reminded that Oatley Swimming baths have a proud and long history, with the existence of the Oatley Swimming Club at Jewfish Bay Baths since 1927 The society will work to ensure that it remains safe in terms of water quality.

 

Penshurst Public School Project

P1000645Oatley Flora and Fauna Society was contacted in mid 2016 to help years 3 & 4 at Penshurst Public School, with a unit on Sustainability in Term 3. We were asked to talk about sustainability or endangered fauna and flora in the Georges River area and to suggest native plants suitable for an area of the playground to be planted by the children.

image2On 15 September four OFF members – Melina Amerasinghe, Vicki Bolling, Liz Cameron and Graham Fry – spoke to about 120 children. Melina presented a slide show on the historical forest on Forest Road, and the subsequent clearing and settlement of the area. The children listened with interest and participated actively, asking question throughout the presentation.         CLICK HERE FOR SLIDE SHOW

P1000652Some plants and birds were highlighted to show the structure and variety of plants and animals of the lost forest with some flowers passed around to the children. A small group of students planted some of the native shrubs we had brought with us. A list of plants suitable for the garden was suggested with an offer by the society to source some for the school.

P1070022There was some concern that with the onset of the warmer weather it may be best to wait till Autumn in 2017. However, as the children were enthusiastic to see the project completed and with the assurances that the caretaker was going to water the plants over the summer holiday, the society funded tube stock from the Menai Wildflower Group nursery. These were planted late in term 4.

InvitationVicki Bolling and Liz Cameron attended the Grand Opening of the Garden on 8 December with a program and refreshments organised by the students. The students sang a song about sustainability with the refrain “refuse, reuse, recycle” composed by one of the teachers and his daughter. We hope this has been a fulfilling project for the children that will instill in them an interest in local flora and fauna.

CLICK HERE FOR PHOTO ALBUM

An Expedition to Spitzbergen in the Arctic

magdalena-fijordGary Schoer, OFF member and extensive Polar traveller joined us once again in November to share his photos and assessment of the beauties of and threats to the Arctic. Gary took us with him on a Aurora Expedition small group expedition to the Svalbard Archipaelego which includes its biggest Island, Spitzbergen, in between Northern Norway and Greenland. 

 
puffinsWhile Gary was fortunate to see and capture some great images of seabirds such as puffins, Northern Fulmars, Ivory Gulls and Guillemonts to name a few, he gave additional insights into their conservation status and particular threats which are causing many populations to plummet in the last 20 years or so.
 
calving-arcticThe smoking gun seems to be especially the rapid increase in average air temperatures, reduction in amount of sea ice especially thicker multi-year ice. In some areas average temperatures have increased by as much as 10 degrees celsius, causing the frozen soil of the tundra to melt and even creating additional pine forests where once there were no trees over many parts of the Arctic. 
 
IMG_9926bear


 
Gary had to travel to 81 degrees North to see 6 of 7 polar bears sighted on the journey on sea ice, which was virtually absent further south…a big change over as little as 15 years since OFFS members Julian and Annette Sheen were there. One other bear was sighted on a small glacial moraine island where it may have had to swim quite a distance to get access to Arctic tern eggs…a pressure on a bird that has flown 15 000 km from Antarctica to breed there.    
 
flowersSo, as Gary emphasised, everything is connected. The changesd size of populations and average body length of the important bird-food fish  may be contributing to sea bird losses.
 
While we in Australia and more temperate worlds argue about how to effect behavioural and fuel use changes to keep average world temperatures below 2 degrees above recent historical levels, the animals, plants and indigenous people who live there are well past that target, and we can only hope that sensible and strong political efforts will stope what we are seeing in the Arctic creating a tipping point that will affect ecosystems well beyond the poles.
magdalena-fijord
 

Oysters – Canaries of our Estuary

laurie-derwentLaurie Derwent spoke at our 24 October 2016 meeting on the rise, fall and eventual demise of the oyster industry along the Georges River.

The Derwent Family were involved in the oyster industry for the best part of 100 years. Lauries spoke from his personal experience as an oyster farmer in his youth and over 35 years experience working for various fisheries and maritime agencies until his retirement in 2013. During his lifetime, Laurie has seen the river change from an ideal oyster-growing environment to a “disaster”.

oysters-from-georges-river

He spoke of the rich history of the estuarine areas around the Georges River – home of the world’s best oyster: Saccostrea glomerata (Sydney Rock Oyster).

He spoke of its cultivation from the early days in 1880’s: when stone was cut, and laid around the estuary to capture spat; and the rack method where oysters were suspended above the mud to avoid the mud worm.

As the production and the demand for oysters increased, this sustainable industry supported many farmers for generations. Then the troubles began with E. coli infection from water pollution; TBT (antifouling paint) influence on shellfish; introduction of rogue Pacific oyster; and the death knell itself – QX in 1994. This parasite ruined the oyster industry in the Georges River and the livelihood of many local farming families.

The humble oyster spends its entire life protected by its sharp shell feeding on the nutrient provided by the healthy River. But as our city continues to grow unabated, and our sewerage and drainage infrastructure buckles, our precious river engorges on a toxic cocktail and the humble oyster is stuck between a rock and a hard place.

PLEASE CLICK HERE FOR FULL POWER POINT PRESENTATION

neverfail-bay-oyster-lease-remnants Neverfail Bay Oyster Lease Remnants oysters-on-shell-bed Lime Kiln Bay Oyster Shell Bed tray-cultivation-oatley-pk Oatley Park Tray Bed Cultivation oyster-trays Pulling up Oyster Trays

 

 

 

 

 

Central Asia

105Talk on Central Asia on 26th September by Julian Sheen

This presentation grappled with the complex history of Central Asia, sometimes known as the five Stans (Kazakhstan, Kyrgyzstan, Uzbekistan, Tajikistan and Turkmenistan).

71Culture, mixing history and geography, dealt with the nomadic tribes of the steppe and the limited influence of China. Stories of such exotic peoples and places as the Sogdians, the Parthians, and the Saminids with Samarkand, Bukhara and Ashkhabad were traced along the great artery of central Asia: the Amu Darya (or Oxus River).

27The backdrop was the towering mountains of the Pamir and Tienshan and the parchment dry of the Karakum desert.
Alexander the Great made his mark here in 320BC, later came the Islamic invasion of the Arabs, the contest with China and the growth of Persian influence leading to the golden age of the Islamic enlightenment (about 900-1200AD).

57Much of this was swept away by the crushing impact of the Mongols in 1220AD followed by the destruction brought about by Tamerlane. Threading though this vivid historical tapestry of beauty, delicate artistry, violence and terror were the Silk Road caravan routes to and from China, India, Persia and Europe.

129

Finally, in the 19th century when the region was fragmented and in decay, the Imperial Russians moved in to face the British Empire active in India and Afghanistan; contestants in what became known as the Great Game. From Russian rule was spawned the Soviet Union which collapsed in 1991 bringing about the five republics we know today.

Flora and Fauna of Northern Alaska

BearsForestOn 22 August Rodger entertained us with another one of his adventures.

On this trip he travelled the notorious Dalton Highway from Fairbanks to Deadhorse, Alaska.

This road featured on the TV programWorlds Most Dangerous Roads”.  See below for video played during talk. Before  1996 it was only open to trucks supplying the Alaskan oilfields. Despite the harsh environment, plants and animals manage to survive.

Rodger talked about their life on the edge of the Arctic Circle . Life in the extreme temperatures at 70 degrees north is tough.

Last treeMost memorable photo from the night was the Northern most spruce tree (now chopped down!)

CLICK HERE TO SEE PRESENTATION

CLICK HERE TO SEE DALTON HIGHWAY VIDEO

 

 

Coal Mining & Water Pollution

River bed crackingAt the October meeting of Oatley Flora and Fauna Conservation Society, Dr Ian Wright from the University of Western Sydney (UWS) presented startling evidence of environmental damage caused by coal mining in the Sydney Region. Dr Wright worked as a scientific officer with Sydney Water investigating the impact of human activities on creeks and rivers in the Sydney basin before taking up a research fellowship at UWS in freshwater ecology and water pollution.

Ian is now a full-time lecturer teaching students in water quality and management, environmental planning and environmental regulation areas. Conducting his research on a limited budget and often faced with a hostile reception from mining interests in the Blue Mountains and Southern Highlands, Dr Wright and his students have persevered, comparing water samples taken upstream of mining activity with those down stream. They have found significant deterioration in water quality attributable to waste water discharge from mining operations. Toxic levels of salt, bicarbonate, zinc, nickel and other minerals have impacted on aquatic life and degraded the waters flowing through prized wilderness areas and World Heritage sites. yshattered_river_bed

Long-wall mining, in particular, is responsible for subsidence in the bedrock of some creeks and streams feeding into Sydney’s water catchments. Dr Wright showed photographic evidence of streams simply disappearing into cracks, only to re-emerge further ‘downstream’ polluted by mining waste. Dr Wright was critical of the Environmental Protection Agency, responsible for regulating the discharge of wastewater from mines. Pollution licence conditions need to be tightened requiring mining companies to meet higher standards, although he conceded the regulator had lifted its game recently but only under pressure from the community and, in turn, government.

Asked how Oatley Flora & Fauna Conservation Society members could help to stop mining companies from causing environmental damage, Dr Wright suggested the best way would be to keep the pressure on our politicians to introduce more stringent rules on mining activities. Dr Wright gave an undertaking to keep the Society informed of future developments in the regulation of the coal industry.

Ian Wright-OFF-presentation-Short-8-nov-2015

150171-clarence-colliery-discharge-investigation

Impact of a coal mine waste discharge on water quality and aquatic ecosystems in the Blue Mountains World Heritage area.

FOR MORE INFORMATION SEE DR WRIGHT’S PUBLICATIONS CLICK HERE FOR MORE ABOUT UPLAND SWAMPS

15 NOVEMBER 2015 – LEADER ARTICLE “Coal Mining Risk revealed at Conservation Society meeting”

Microbat Predation on Mosquitoes

MicrobatDr Leroy Gonslaves studied the diet of microbats that live on the Central Coast for his PhD. His study area in Empire Bay has large areas of saltmarsh, which can support huge numbers of mosquitoes at different times of the year. Apart from nuisance biting, these particular mosquitoes have the potential to spread diseases such as Ross River and Barmah Forest viruses – which can cause rashes, fever and rheumatic pains. To See Powerpoint of Talk Click Here ( 75MB) Dr Gonslaves has also surveyed 56 Sites across Sydney for Microbats. Click here to see Sydney Morning Herald article