. Bulletin. Science; Natural history; Natural history. 50 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. Fig. 2. View east of upper portion of King Street canal (3 March 1977). Cold water source to extreme right center and undercut bank to left of center. Shallow wash to lower right. The thermal water measured ca. 2° cooler. The cold source was the same. Dis- solved oxygen measurements ranged from mg/1 at 37°C to mg/1 at 22°C. Other measures of water quality such as total dissolved solids at showed little variability between the stations. On 18 March 1978, one year later, the area was
. Bulletin. Science; Natural history; Natural history. 50 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. Fig. 2. View east of upper portion of King Street canal (3 March 1977). Cold water source to extreme right center and undercut bank to left of center. Shallow wash to lower right. The thermal water measured ca. 2° cooler. The cold source was the same. Dis- solved oxygen measurements ranged from mg/1 at 37°C to mg/1 at 22°C. Other measures of water quality such as total dissolved solids at showed little variability between the stations. On 18 March 1978, one year later, the area was visited in order to assess the influence of flooding on the previously observed niche separations. Heavy rains occurred during late summer 1977 and winter 1978. The area barely was recog- nizable. Discussion with nearby residents revealed that flooding had obliterated the stream banks, allowing water to flow over 3 m deep and 15 m wide. Virtually all rooted vegetation was removed. The following February, the channel was rebuilt. Bulldozers reconstructed canal walls, the bottom was scraped, and por- tions were stabilized with rocks held in place by wire mesh and iron posts. Figures 2 and 3 depict the canal before and after reconstruction. Reconstruction greatly reduced habitat diversity and sorting of fish species was poorly defined (Table 3). The hot water and cold water inflow pipes were in their former positions and a temperature gradient remained. Above the cold water inflow a small earthen dam had been constructed, apparently to impound the hot water. This impoundment was a full meter in depth at the center and apparently was being used by local residents for bathing, washing clothes, and Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, C
Size: 1769px × 1412px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectnaturalhistory, booksubjectscience
