Ram A S Pradeep, Nair S, Chandramohan D
Department of Microbiology, National Institute of Oceanography, Dona Paula, Goa 403 004., India.
Microb Ecol. 2003 Jan;45(1):88-96. doi: 10.1007/s00248-002-3005-9. Epub 2002 Dec 10.
Bacterial growth efficiency (BGE) is an index of organic carbon passing through bacteria in an aquatic system. BGE values of natural bacterioplankton assemblages were measured in tropical estuarine and adjacent coastal waters in Goa along the southwest coast of India. The BGE values for estuarine and coastal waters were 18 (+/-7.84%) and 11 (+/-4.19%), respectively. BGE in these waters were at the lower end of what is usually found in productive systems. This may be due to the high respiration rates. Further, it was observed that grazers also influenced BGE. As BGE was positively correlated with bacterial productivity, the observed variation in BGE was attributed to bacterial productivity. BGE was inversely related to C:N ratio, indicating a close coupling between the nature of the substrates and BGE. Being system-dependent, the variations in BGE at the two locations were dynamic and were regulated by the quality of the substrates. Therefore, a constant value for BGE would lead to error in carbon budgets in these waters.
细菌生长效率（BGE）是水生系统中有机碳通过细菌的一个指标。在印度西南海岸果阿邦的热带河口及邻近沿海水域测量了天然浮游细菌群落的BGE值。河口和沿海水域的BGE值分别为18（±7.84%）和11（±4.19%）。这些水域的BGE处于生产性系统中常见范围的下限。这可能是由于呼吸速率较高。此外，还观察到食草动物也会影响BGE。由于BGE与细菌生产力呈正相关，观察到的BGE变化归因于细菌生产力。BGE与碳氮比呈负相关，表明底物性质与BGE之间存在紧密耦合。由于BGE取决于系统，这两个地点的BGE变化是动态的，并且受底物质量的调节。因此，BGE的恒定值会导致这些水域碳收支出现误差。
