365 research outputs found
Nitrate anomaly in the upper nutricline in the northern South China Sea - Evidence for nitrogen fixation
No full textEfficient trapping of organic carbon in sediments on the continental margin with high fluvial sediment input off southwestern Taiwan
No full textEffects of ChangJiang River summer discharge on bottom-up control of coastal bacterial growth
No full textWinter phytoplankton blooms in the shallow mixed layer of the South China Sea enhanced by upwelling
No full textThermal effects on heterotrophic processes in a coastal ecosystem adjacent to a nuclear power plant
No full textThe importance of planktonic community respiration on the carbon balance of the East China Sea in summer
No full textDiel cycles of heterotrophic bacterioplankton abundance and production in the ocean surface waters.
No full text[[sponsorship]]環境變遷研究中心[[note]]已出版;[SCI];有審查制度[[note]]http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Drexel&SrcApp=hagerty_opac&KeyRecord=0948-3055&DestApp=JCR&RQ=IF_CAT_BOXPLO
Bacterioplankton growth responses to temperature and chlorophyll variations in estuaries measured by thymidine:leucine incorporation ratio
No full textTo identify the biochemical response of heterotrophic bacterioplankton to changing environmental conditions, seasonal and diel cycles of bacterial protein and DNA synthesis rates were estimated in temperate estuarine habitats from H-3-leucine (Leu) and H-3-thymidine (TdR) incorporation rates. Several short-term temperature manipulation experiments (5 to 35 degrees C) and 2 mesocosm experiments were performed to examine the effects of temperature and substrate supply on the ratio of Leu:TdR, respectively. The molar ratio of Leu to TdR varied about 5-fold (5.6 to 29.5) in the field and the values of the ratio were lower and more constant during high temperature (>25 degrees C) and high chlorophyll a (>8.0 mu g l(-1)) periods. In the temperature manipulation experiments, the Leu:TdR ratio decreased as temperature increased. In the mesocosm experiments, the Leu:TdR ratio was negatively correlated with chlorophyll a concentrations and bacterial specific growth rates. We propose that changes toward less favorable environmental conditions (e.g. reductions in temperature or substrate supply in temperate estuaries) might reduce bacterial protein and DNA synthesis rates simultaneously. However, the former process may be favored to maximize survival and this might lead to a higher Leu:TdR ratio. Conversely, when environmental conditions turn favorable, both processes could be enhanced and bacteria might optimize DNA duplication over protein metabolism to maximize reproduction, resulting in lower Leu:TdR ratios. Our results further indicate the complementariness of H-3-thymidine and H-3-leucine incorporation measurements for understanding processes controlling bacterial production since the ratio of these 2 tracer methods varied independently with temperature and substrate supply.Virginia Institute of Marine Scienc
Potential importance of lagoons as breeding grounds for bluegill Lepomis macrochirus in Lake Biwa, Japan
No full text[[sponsorship]]環境變遷研究中心[[note]]已出版;[SCI];有審查制度[[note]]http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Drexel&SrcApp=hagerty_opac&KeyRecord=1439-8621&DestApp=JCR&RQ=IF_CAT_BOXPLO
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