Unnamed Creek, Talisker Conservation Park, Talisker Conservation Park
2013 Aquatic Ecosystem Condition Report
- Dry in autumn and spring 2013
- Likely to be low in nutrients when wet due to the extent of native vegetation in the catchment
- Riparian vegetation consisted of gums over weeds and introduced grasses
- No evidence of any fine sediment deposits, bank erosion, or stock and feral animals accessing the creek
About the location
The creek was given a Fair rating because the site sampled showed evidence of moderate changes in ecosystem structure and some changes to the way the ecosystem functions. There was evidence of human disturbance due to the weediness of the riparian zone, despite the site lying within a conservation park.
The 1.5 m wide creek was dry in both autumn and spring 2013. No macroinvertebrate or water quality data was consequently available for this site.
The sediments were dominated by detritus, with smaller amounts of sand and clay also present; samples taken from below the surface were grey sands and there was no evidence to indicate that the sediments had been anaerobic or lacking in oxygen when the creek last dried (e.g. no odours or signs of blackened sediments). There were no areas of significant bank erosion present and the only animals droppings seen near the creekline were from kangaroos.
There was also no evidence of any dried filamentous algal mats seen during either inspection of the site in 2013. Less than 10% of the channel was covered by a few patches of rush (Juncus) but other aquatic plants commonly seen in the region did not occur in this stream. The narrow, 5 m wide riparian zone was dominated by gum trees over weeds, introduced grasses and a few scattered rushes. The surrounding vegetation near the site comprised steep-sided hills covered with either native woodland or cleared for grazing sheep.
Special environmental features
The main environmental value of this creek relates to its location within a conservation park. However, it appears to be too ephemeral to be able to support and sustain significant aquatic ecosystem values in the region.
Pressures and management responses
|Widespread introduced weeds in the riparian zone at the site and upstream (reducing habitat quality).||The Adelaide and Mount Lofty Ranges NRM Board has several pest plant (weed) mitigation and control programs. They work closely with landholders to control weeds on their property and to help stop the spread to other properties and waterways.|
This aquatic ecosystem condition report is based on monitoring data collected by the EPA. It was prepared with and co-funded by the Adelaide and Mount Lofty Ranges NRM Board.