The temperatures of the Aumsville Wetlands are between 13 and 14 C. We were only able to take water samples at the surface to four feet below due to our lack of resources. If we were able to take samples from deeper depths the temperature would be lower and fish would spend their time in the deeper cooler portion of the pond. This would only occur if the temperatures were optimal in Porter Creek. The water temperature is on the higher range of the optimal level. This is a concern because these temperatures were taken in late fall when the water temperatures should be cooler. The water temperatures will increase greatly during the warmer months of the year.
The dissolved oxygen concentrations at the Aumsville site were extremely high ranging from 8.2 to ll.6 mg/l. According to the Habitat Suitability Index the optimal dissolved oxygen is above 8 mg/l.
The pH of the water at Aumsville Wetlands are neutral, neither basic or acidic. Therefore, the pH will not have an adverse effect on the salmon.
Access from the pond to Porter Creek
From observation, we found that in order for the salmon to have access to the pond, a barrier at the noth east of the pond to the stream would have to be removed.
The soil at Aumsville Wetlands is mainly nekia silty clay loam (7). The rock types at the site are Columbia River Basalt Group Lava and Alluvium and basin-fill deposits (15). Annual precipitation is gathered by the surrounding cities, Salem (39.24 in/yr) and Stayton (51.48 in/yr) (7).
Connectivity, Species use, and Time of Year Utalized
As stated by Gary Galovich at Oregon Department of Fish and Wildlife, Aumsville Wetlands is part of the Mill Creek Watershed. Mill Creek gets a great deal of its water from the North Santiam River via an artificial diversion located in the Stayton area. Mill Creek supports primarily cutthroat trout but because of the hydrologic connection with the North Santiam winter steelhead may be seen migrating through the system during the winter and early spring. Although adult salmon and steelhead are rare to non-existent in Mill Creek, juvenile salmon and steelhead use the system for rearing habitat and seasonal refuge. When floods occur the fish take advantage of the slower moving water of the wetlands to avoid the high current of the main channel.