Intracellular nitrate storage allows microorganisms to survive fluctuating nutrient availability and anoxic conditions in aquatic ecosystems. Here we show that diatoms, ubiquitous and highly abundant microalgae, represent major cellular reservoirs of nitrate in an intertidal flat of the German Wadden Sea and are potentially involved in anaerobic nitrate respiration. Intracellular nitrate (ICNO3...

An investigation on soil organic carbon,total N and NO3--N,available microbial biomass C,N and basal respiration and metabolic quotients(qCO2)was conducted to compare diferences in soil microbial properties and nutrients between 1 5-year-old pure Chi— nese fir(Cunninghamia lanceolata)and two mixed Chinese fir plantations(mixed plantations with A/nus cremastogyne,mixed plantations with Kalopanax...

Getting more pumped It is thought that the ocean's biological carbon pump, process transfers organic matter from surface to deep ocean, should be sensitive climate change because temperature controls photosynthesis and respiration rates. Boscolo-Galazzo et al. show efficiency of pump increased over past 15 million years as oceans cooled a reduction in rate breakdown sinking (see Perspective by ...