Particle cycling rates in marine systems are difficult to measure directly, but of great interest understanding how carbon and other elements distributed throughout the ocean. Here, particle production, aggregation, disaggregation, sinking, remineralization, transport mediated by zooplankton diel vertical migration were estimated from size-fractionated measurements particulate organic (POC) con...

Background: Enamel is regularly subjected to demineralization and remineralization under different oral circumstances. Any interruption in the balance between can initiate formation of incipient caries lesions. However, early stage these lesions be remineralizedusing various preventive measures. Topical fluorides have shown positive results prevention several studies. The aim this study was det...

Experiments with realistic scenarios of species loss from multitrophic ecosystems may improve insight into how biodiversity affects ecosystem functioning. Using 1000 L mesocoms, we examined effects of nonrandom species loss on community structure and ecosystem functioning of experimental food webs based on multitrophic tropical floodplain lagoon ecosystems. Realistic biodiversity scenarios were...

The remineralization rate of sedimentary organic carbon (Rorg) and the depth-integrated, diffusion-supplied O2 consumption rate (IOC) during microbial metabolism in sediments was investigated in three deep-sea sites at 1100, 2000 and 3500 m water depth in the eastern north Atlantic during the spring and summer 1998. In-situ pore water O2 profiles yielded an IOC of 0.45F0.07 mmol O2 m 2 day 1 at...