Benthic habitat quality assessment of an oxygen stressed fjord by surface and sediment profile images

In May and October 1994 the benthic habitats in Havstensfjord (26 km²), a seasonally oxygen stressed stratified fjord, were classified by taking sediment surface and sediment profile images (SPI) at 90 stations, randomized into nine strata. Qualitative grab samples for faunal inspection were taken at about of the stations in both May and October to help to identify objects in the images. The images give information on sediment characteristics (texture, oxic/anoxic conditions, lamination) which often can be related to functional properties of the macrofauna (burrows, tubes, feeding voids, reworked sediment) or to observations on benthic epifauna. In combination, such variables mirror the quality of the benthic habitat. Analysis of sediment profile images was done with multivariate methods [Benthic Habitat Quality (BHQ) index] and univariate statistical methods to describe differences between areas and depths. Variance analysis of BHQ indices indicated a significant interaction between area and depth. In both the northeast and northwest strata the oxygen stress had induced a habitat degradation at depths deeper than 25 m compared to shallower northwest and northeast strata and all south depth strata. No significant difference in mean BHQ index was found between May and October. We discuss the potential application of the SPI technique for efficient monitoring oxygen stressed marine coastal areas.     

氧化还原液流电池的研究进展

氧化还原液流电池(RFB)是一种可充电的燃料电池(RFC),是一种新型电化学储能装置。从70年代研究以来,得到迅速的发展。本文介绍这种电池的原理、电池结构和特点,发展历史及技术现状,指出了技术难点,展望了其发展前景。     

钛表面氧化还原改性对血液相容性的影响

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全钒液流电池研究进展

介绍了全钒液流电池的原理和特点,综述了国内外研究发展现状和研究热点,展望了发展前景。     

Research Progress of Vanadium Redox Flow Battery

介绍了全钒液流电池的原理和特点，综述了国内外研究发展现状和研究热点，展望了发展前景。