關鍵字: 異營性細菌, 營養鹽限制, 颱風, 顆粒態有機碳, 實驗室操控實驗, 漂浮性細菌與附著性細菌 ;An 11- year investigation of the free-living and attached bacterial production, abundance and specific growth rates in a mineral-limited, subtropical freshwater system revealed large variability in the dynamics that is influenced by temperature and substrate availability. Temperature has a significant positive effect on bacterial production at several spatial and temporal (hours, seasonal, interannual and decadal) scales; but the effect is modified by the availability of substrate. Free-living and attached bacteria showed dissimilar response to temperature shifts (increasing and decreasing temperature) with a decline in free-living BP during the warmest months. This may be brought about by the limitation and co-limitation with carbon, nitrogen and phosphates that was confirmed during the laboratory manipulation experiments. In addition to thehourly, seasonal, interannual and decadal controls of bacterial production, it was also revealed that episodic events can influence the dynamics of free-living and attached bacteria. Heavy precipitation from strong typhoons caused changes in the dynamics of particulate organic compounds and phosphate which benefitted the attached more than the free-living bacteria. The previously reported dissimilar abilities of the two bacterial lifestyles to process organic matter and the observed dissimilar response to environmental controls showed how the attached bacteria can dominate the total production. This can have important consequences on the assessment of microbial processing of organic matter.
