摘要
Temporal changes in abundance, growth and mortality of heterotrophic bacteria were investigated from frequent dilution experiments in the Oyashio region to evaluate their response to the spring phytoplankton bloom. Bacterial abundance fluctuated from 1.0 to 2.6×105 cells mL−1. Cell density was not different between the pre-bloom and bloom periods, and showed no clear temporal pattern. Potential growth (g′) and mortality (m) varied from 1.11 to 2.39 day−1 and from 1.21 to 2.16 day−1, respectively. Neither g′ nor m was correlated with water temperature or chlorophyll a. Apparent growth rate in unenriched 100% seawater incubations (go) was not limited by nutrients throughout the study period and was comparable to net growth rate (g′−m) estimates from dilution experiments. These results suggest that bacterial abundance is nearly steady-state in the pre-bloom and bloom period, because bacterial growth is nearly nutritionally saturated and balanced with high mortality.
摘要译文
纷纷时空变化，增长和异养细菌死亡率频繁稀释实验进行了调查，在亲潮地区，以评估它们对春季浮游植物绽放。1.0细菌丰度波动为2.6×10 SUP 5 / SUP细胞毫升SUP潜在增长率（G也不米率与水温或叶绿素a。表观增速未浓缩100％海水孵化（去），不是由营养素在整个研究期间的限制，是可以媲美净值增长率（GM）估计，从稀释实验。这些结果表明，细菌丰度接近稳定状态在预绽放，开花期，因为细菌的生长几乎饱和的营养和死亡率高的平衡。
T. Kobari[a]; K. Mitsui[a]; T. Ota[b]; M. Ichinomiya[c]; Y. Gomi[d]. Response of heterotrophic bacteria to the spring phytoplankton bloom in the Oyashio region[J]. Deep Sea Research Part II: Topical Studies in Oceanography, 2010,57(17-18): 1671–1678