Two YSI6000 dataloggers have been placed at the Tivoli Bays component site of the Reserve. The instruments are deployed 0.5 meters off the bottom in vertically mounted perforated PVC tubes. Instruments are deployed for a two to four week duration from April through November each year. Data are collected at 30 min. After instruments are retrieved, instrument calibration is checked against standards, data are uploaded, and instrument probes are serviced.
Data are uploaded via a cable to a laptop computer.
The dissolved oxygen membranes are replaced before deployment and are allowed to sit at least 24 hrs prior to deployment. These four components are located along 100 river miles of the Hudson and are representative of the diverse plant and animal communities that occupy the salinity gradient within the Hudson estuary. The two YSI6000 dataloggers are placed at Tivoli Bays component site. 33.445 W, the receiving body for the Saw Kill, is a tidal freshwater wetland with a tidal range of 3.9 ft. All sampling is ongoing, however, we cannot sample from approximately December 1 through March 31 due to winter storms and ice on the Hudson River and tributaries.