The dam reduced the amount of silt and water coming down from the waterfall into the gorge by 90 percent. This led to the spray toad's microhabitat being compromised, as it reduced the amount of water spray, which the toads were directly reliant on for oxygen.
The dam significantly decreased the amount of silt and water flowing into the gorge by 90 percent. This resulted in the spray toad's habitat being threatened, as it reduced the amount of water spray, which the toads were entirely dependent on for oxygen.