Darebin Creek News Friends of Darebin Creek
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Darebin Creek News Friends of Darebin Creek April 2008 Upcoming events to look out for 27 April Sunday – Working Bee at Electric Spur with City of Banyule and MCMC Melway 31 D1 Cnr Gona St & Liberty Pde Heidelberg West. 10am-12noon. Morning tea and kids activities provided. 25 May Sunday – Bike Ride/Picnic “Explore Darebin Creek” (route TBA) www.friendsofdarebincreek.org.au Environmental Event Reports Quarry Hills Walk - 26 August 2007 This walk was led by local environmentalist Peter Roberts and took place on a beautiful day up at Mill Park. The park entrance was spectacular with magnificent plantings. Wildflowers could be seen along the way as well as some birdlife. Peter’s expertise in environmental interpretation was very evident, he even pointed out all the surrounding mountains with their name and height (“I know them because I’ve climbed them all.”) His young daughter was also impressively fit and managed to keep up with the adults. We concluded the walk by examining the girth of a large river red gum. This particular tree had two branches that had crossed then grown together, considered a tree of great significance by indigenous peoples. 1 Thanks to Sheryl and Peter for making this day possible. Text and photos Sean Walsh Darebin Creek Discovery Walk 11 November 2007 This walk was led by Brian Bainbridge from Merri Creek Management Committee, who has been providing training to the Friends of Darebin Creek on weed identification and management. We started at the Darebin Creek park entrance at Gona St, Heidelberg West, and examined some weeds that appeared to have come over (and in some cases under) residential fences. From there we went for a walk through the surrounding streets, looking for invasive plants that are being carefully tended by not-very-well-informed gardeners. We spotted some real nasties, including desert ash, sweet pittosporum, mirror bush and cotoneaster. A wide variety of commonly cultivated plants can go a-wandering and become an invasive problem for the Darebin Creek. Please check before buying a plant whether it’s known to be a local environmental weed. Council brochures (such as http://www.banyule.vic.gov.au/Assets/Files/Weeds brochure.pdf) are a good source of information. We finished the walk back at the Darebin Creek with some morning tea and discussion, while our Art Coordinator (Fiona H) sat in the shade and sketched some local plants. Thanks to Brian for a great day and for sharing his knowledge with FODC. Text Sean Walsh 2 Clean Up Australia Day 2nd March 2008 Our regular annual cleanup was at a different site this year, with the focus being a small wetland between Gona St and Southern Rd. Thanks to everyone who helped on the day. A special mention goes to Chris Murphy and Chris Walker-Cook who got down into the muddy reeds to rid the wetland of accumulated litter. An unexpected benefit of the day was discovering plenty of wildlife. A skink accidentally landed in my clean up bag. I gently took it out and it kindly posed for a photograph. A similar thing happened with a young praying mantis. But the real surprise of the day was found at the edge of the wetland. I spotted a little creature with a dark purple body and a bright yellow stripe running down its entire length. It moved like a worm, stretching its body out and slithering. It was probably about 10-15 cm long when fully stretched out. Julia Vanderoord (our regional waterwatch coordinator) consulted her network of experts and we have some ideas, but still don’t have a definitive answer as to what it is. Possible phyla include the Nemertea (ribbon worms) or Platyhelminthes (terrestrial flat worms). I am pretty sure it wasn’t a leech because of the way it moved, and it didn’t seem to have a noticeable mouth like leeches do. The colours of this little worm were very impressive. If anyone has any further ideas on what it might be, or if you have seen one yourself, please let us know. Thanks again to the Banyule Bush crew for supporting the cleanup effort. Text and photos Sean Walsh 3 _________________________________ Nature Returns to Upper Darebin Catchment On 29 June Friends of Darebin Creek will join together with Darebin Parklands Association (DPA) members and a private landholder to protect the endangered Plains Grassy Woodland community in Woodstock. Woodstock is approximately 30 km north of the city and is a rural area that is in the headwaters of the Darebin Creek. The Darebin Creek Management Committee will coordinate the project with funds from the Australian Government’s Natural Heritage Trust through the Northern Nature Project*. Over 1000 indigenous plants comprising, tree, shrub, grass and groundcovers will be planted. The DPA will supply some of the plants from their plant nursery project. The landholder will fence off the site to exclude stock and will undertake weed control before the planting takes place. This project builds on the 2007 project where over 50 volunteers were involved in restoring Grassy Woodlands on a private landholding in Mernda. This is your opportunity to visit the very top of the Darebin Creek Catchment and contribute to the enhancement of our precious Grassy Woodlands. 4 To get involved or find out more contact Therese Grinter on 94994454 or [email protected] *Northern Nature Creek Connections is a joint project of Merri Creek Management Committee, Moonee Ponds Creek Coordination Committee and Darebin Creek Management Committee and funded by Natural Heritage Trust. ________________________________ From the City of Darebin Bushland Management Team Wildlife Sightings We again recorded Growling Grass Frogs at the Growling Grass Frog Dam at Bundoora Park. It was very pleasing to hear them calling from an area that we revegetated with reeds and rushes just last year. We have also observed Mistletoe Birds near Bell Street, Nankeen Night Herons at Dundas Wetland and Black-fronted Dotterels at Bundoora Park. We also spotted a Blue- tongued Lizard and four Tawny Frogmouths at Cherry Street Reserve and had a mob of seven Grey Kangaroos and a pair of Grey Currawongs at Forensic Drive Reserve in Macleod West. Weed Control A Chilean Needle Grass (CNG) control method we have been trialling over the last couple of years is starting to show good success. We first spray out an area of CNG then thatch the area with Kangaroo Grass Themeda triandra thatch. The site is then left for at least six months for the seed to fall out of the thatch and drill into the top soil. Finally we burn the thatch which also encourages the seed to germinate. I did two quadrats at one of our sites and found 38 Themeda seedlings per square metre in one and 50 seedlings per square metre in the other. We will still need to do follow up weed control in these sites but with this much germination of the Kangaroo Grass seed it should provide good competition against the CNG. (Photos: Kangaroos at Cherry St & Nankeen Night Heron) Chris Cobern, Team Leader, City of Darebin Bushland Management 5 Have you seen this weed? The flower stalks are a distinguishing feature of Alligator Weed. Alligator weed (Alternanthera philoxeroides) is currently growing along the Darebin Creek, including within the boundaries of the Darebin Parkland. Originating from South America, Alligator weed has been classified as a Weed of National Significance (WONS). In Victoria, it has also been proclaimed as a State Prohibited Weed, which is the highest category to which a noxious weed can be listed. This means all infestations, must be eradicated from the state. Melbourne Water (MW), in conjunction with the Department of Primary Industries (DPI) is currently managing these infestations. Eradication is needed because of the serious impacts this weed has on both aquatic systems and agricultural land. Alligator weed is very invasive and has the ability to regenerate from fragments. According to the latest computer-based modeling, Alligator weed has the potential to spread to almost all Australian waterways, wetlands and flood plains. This weed is very similar looking to Australian native species. However, Alligator weed has white, papery flowers on a long peduncle or flower stalk. These stalks do not exist in native Alternanthera species. If you see this weed do not attempt to remove it, please ring your local council, the D.P.I. – Frankston Centre (03) 9785 0111 or the Darebin Parklands Rangers (03) 94993486. Matthew Strong, Darebin Parklands Ranger ____________________________________ Friends of Darebin Creek Annual General Meeting (5/3/08) Guest Speaker was Peter Roberts a campaigner for Redgums who spoke about the precarious state of the old redgums along the Darebin Creek & the northern corridor, due to expanding development. He emphasized their traditional & spiritual values as well as their environmental significance. 6 Peter said there is some limited council (Whittlesea) support for his work, but although the trees are classified as significant, this is really a token gesture – 1 metre outside the drip line, & the isolation of each individual tree, means there is no support, as it is often surrounded by asphalt or concrete outside the protected area. The soil becomes anaerobic & compacted, & there is no understorey. Some are many hundreds of years old, and were here first, so should be taken into consideration much more than they are. Some developers are more sensitive than others eg Australand, Aurora, but most are just there for the money, & the trees quickly deteriorate after they are gone. He urged us to consider the Spirit of Place (genus loci) & emphasized how the birds, mammals & insects need the growth corridor, & how the environment warms up with too much city growth (urban heat island effect), and this area is expected to be a rapid growth corridor.