Author Institution: The Ohio State University, and The Ohio Department of Natural Resources, Rese... more Author Institution: The Ohio State University, and The Ohio Department of Natural Resources, Research Dvision
attempted to investigate the bottom of the spring with the aid of SCUBA. Unfortunately, light pen... more attempted to investigate the bottom of the spring with the aid of SCUBA. Unfortunately, light penetration was extremely limited with no visible light on the bottom. Even with the aid of underwater diving lights visibility was not increased. The light beam could only penetrate the water column several centimeters. It is postulated that the recent heavy rains had increased the turbulence at the bottom from increased output of the feeder springs and resulted in the decreased light penetration. A thick, green layer was noted while decending the anchor rope. This layer was concentrated between 2 and 4 m, the lower limit being the extent of light penetration. A sample of the water in the "green layer" was collected and several drops were observed under a microscope. High numbers of the unicellular alga Chlamydomonas sp. were observed along with smaller numbers of Oocystis sp. Hille (personal communication) commented that he also observed a population of Chlamydomonas sp. in his study of the Miller Blue Hole and that the population appeared to vary in depth distribution with time. Oxygen and temperature profiles were obtained with a YSI Model 51 oxygen meter and are presented in table 1. It is apparent that oxygen was absent below '•Note received November 1, 1973 (73-74).
Gordon Creek, a tributary of the Maumee River in northwestern Ohio, was investigated by Meek in 1... more Gordon Creek, a tributary of the Maumee River in northwestern Ohio, was investigated by Meek in 1887, by Trautman 1929-38, by the personnel of the Ohio Division of Wildlife between 1954 and 1973, and by Trautman and Gartman in 1973. Dredging and ditching in this area were begun about 1850, continuing until the present, with major channelization occurring in 1935.
Gordon Creek, a tributary of the Maumee River in northwestern Ohio, was investigated by Meek in 1... more Gordon Creek, a tributary of the Maumee River in northwestern Ohio, was investigated by Meek in 1887, by Trautman 1929-38, by the personnel of the Ohio Division of Wildlife between 1954 and 1973, and by Trautman and Gartman in 1973. Dredging and ditching in this area were begun about 1850, continuing until the present, with major channelization occurring in 1935.
Author Institution: The Ohio State University, and The Ohio Department of Natural Resources, Rese... more Author Institution: The Ohio State University, and The Ohio Department of Natural Resources, Research Dvision
attempted to investigate the bottom of the spring with the aid of SCUBA. Unfortunately, light pen... more attempted to investigate the bottom of the spring with the aid of SCUBA. Unfortunately, light penetration was extremely limited with no visible light on the bottom. Even with the aid of underwater diving lights visibility was not increased. The light beam could only penetrate the water column several centimeters. It is postulated that the recent heavy rains had increased the turbulence at the bottom from increased output of the feeder springs and resulted in the decreased light penetration. A thick, green layer was noted while decending the anchor rope. This layer was concentrated between 2 and 4 m, the lower limit being the extent of light penetration. A sample of the water in the "green layer" was collected and several drops were observed under a microscope. High numbers of the unicellular alga Chlamydomonas sp. were observed along with smaller numbers of Oocystis sp. Hille (personal communication) commented that he also observed a population of Chlamydomonas sp. in his study of the Miller Blue Hole and that the population appeared to vary in depth distribution with time. Oxygen and temperature profiles were obtained with a YSI Model 51 oxygen meter and are presented in table 1. It is apparent that oxygen was absent below '•Note received November 1, 1973 (73-74).
Gordon Creek, a tributary of the Maumee River in northwestern Ohio, was investigated by Meek in 1... more Gordon Creek, a tributary of the Maumee River in northwestern Ohio, was investigated by Meek in 1887, by Trautman 1929-38, by the personnel of the Ohio Division of Wildlife between 1954 and 1973, and by Trautman and Gartman in 1973. Dredging and ditching in this area were begun about 1850, continuing until the present, with major channelization occurring in 1935.
Gordon Creek, a tributary of the Maumee River in northwestern Ohio, was investigated by Meek in 1... more Gordon Creek, a tributary of the Maumee River in northwestern Ohio, was investigated by Meek in 1887, by Trautman 1929-38, by the personnel of the Ohio Division of Wildlife between 1954 and 1973, and by Trautman and Gartman in 1973. Dredging and ditching in this area were begun about 1850, continuing until the present, with major channelization occurring in 1935.
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