Audio slideshow: Sea drifters
Colourful close up images of plankton, the tiny creatures that hold the key to survival in the world's oceans, are going on show at London Zoo - as part of The Royal READ MORE http://news.bbc.co.uk/2/hi/science/nature/8498786.stm
Plants at the base of the Arctic food chain include the diatoms, protozoans, phytoplankton, and ice algae. Discover the flow of energy through the Arctic food chain.