Division of Biology, Kansas State University, Manhattan, Kansas 66506.
Appl Environ Microbiol. 1985 Jan;49(1):238-41. doi: 10.1128/aem.49.1.238-241.1985.
Responses of native aquatic bacteria to source and concentration of dissolved organic carbon was observed by using gradient plates. Dissolved organic carbon of prairie (grasses) or gallery forest (bur oak) origin was used as the carbon source in these observations. Bacteria isolated from sediments in the grassland reaches of a prairie stream showed growth only on grass leachates. Bacteria isolated from the gallery forest reaches of the same stream were able to grow on plates made from either source of leachate. The differing quality, quantity, and rate of supply of these dissolved organic carbon sources should select for variation in the bacterial assemblages.
采用梯度平板法观察了土著水生细菌对溶解有机碳的来源和浓度的响应。这些观察中使用了草原（草）或林窗（栎）来源的溶解有机碳作为碳源。从草原溪流的草地河段沉积物中分离出的细菌仅在草浸出液上生长。从同一溪流的林窗河段分离出的细菌能够在两种浸出液来源制成的平板上生长。这些溶解有机碳源的质量、数量和供应速率的差异，应该会选择出不同的细菌组合。
