Dissolved Organic Carbon: Patterns of Utilization and Turnover in Two Small Lakes

✍ Scribed by Prof. Dr. Harold L. Allen

• Publisher: John Wiley and Sons
• Year: 1973
• Tongue: English
• Weight: 521 KB
• Volume: 58
• Category: Article
• ISSN: 1434-2944
• DOI: 10.1002/iroh.19730580503

✦ Synopsis

Abstract

Planktonic bacterial utilization of ^14^C‐labelled glucose and acetate was monitored by kinetic measurements throughout an annual period in a small lake. Resulting kinetic uptake data have shown that from 1–15% of the total dissolved organic carbon pool was removed chemo‐organotrophically per day during the year by bacteria capable of metabolizing these substrates.

The kinetic uptake of nine selected organic compounds was measured in a second small lake during summer thermal stratification. Metabolism of glucose, acetate, and glycollate was preferred. Respiration rates of the nine compounds varied generally between 20–60% of the total uptake. The uptake of these compounds accounted for removal of 3–8% of the total dissolved organic carbon pool per day.