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“Conservation is a state of harmony between humans and the land. By land is meant all the things on, over or in the earth. Harmony with land is like harmony with a friend, you cannot cherish his right hand and chop off his left. That is to say, you cannot love game and hate predators; you cannot conserve the waters and waste the ranges; you cannot build the forest and mine the farms. The land is one organism" Aldo Leopold in THE SAND COUNTY ALMANAC


Mountain bike trails pose a significant threat to the fragile ecosystem of the ridge. As City of Cockburn has failed to conduct an Environmental Impact Assessment, community members with expertise are currently undertaking their own assessments.

In general, mountain bike trails have the following impacts:

1. Physical clearing of bush for construction of trails and associated infrastructure.


2.  Compaction of soil. This reduces water and air permeation causing vegetation death, including mature trees.

3. Weed proliferation. Disturbance along trails allows weeds to penetrate further in to bush in good condition, and makes the recovery of degraded areas more difficult.

4. Animal disturbance. Many shy animals, such as wrens call Manning Ridge home. They require large tracts of undisturbed bush land in order to be sustained. 

5. Disruption of feeding birds, including endangered Carnaby Cockatoos.

6. Erosion.

7. Spread of dieback, not all of which is inhibited by limestone soil.

8. Altered water flow. Water flows freely down tracks, instead of soaking into the soil, causing vegetation loss.

9. Bushland fragmentation. 


Mountain bike trails will impact the community's access and interaction with this bushland. Official paths are never enough, and more and more paths will be constructed.

1. Lack of balance in ensuring equitable and enjoyable access to the park for all residents of the Cockburn Community be they 9 or 90.

2. Catering to the interest of predominantly non-Cockburn residents over locals. Loss of close knit local community.

3. Complete dominance of active recreation over bushland appropriate passive recreation.

4. Lack of benefit to local business, as mountain bikers tend to arrive, ride, and leave.

5. Lack of transparency of cost to ratepayers, in regard to construction, maintenance and future infrastructure.

6. Increase traffic and parking problems, especially during events (which will likely require further parking infrastructure).

7. Concern of potential damage to known and unknown heritage and aboriginal sites.