Ctenophora predation by ctenophores may control the populations of small zooplanktonic organisms such as copepods, which might otherwise wipe out the phytoplankton (planktonic plants), which are a vital part of marine food chains. Almost all ctenophores are predators – there are no vegetarians and only one genus that is partly parasitic. If food is plentiful, they can eat 10 times their own weight per day. While "Beroe" preys mainly on other ctenophores, other surface-water species prey on zooplankton (planktonic animals) ranging in size from the microscopic, including mollusc and fish larvae, to small adult crustaceans such as copepods, amphipods, and even
Short food supply chains can develop autonomous marketing strategies based on differentiation. These strategies give farmers the possibility of keeping a bigger share of the value added within the farm and within the local economies. Given these characteristics, short food supply chains are increasingly taken into consideration by rural and food policies as a driver of change in the food system and a policy tool for rural development. The analysis of short food supply chains has fed a broader debate on "alternative food chains", "alternative food networks", and "sustainable food chains". SFSCs are considered the most appropriate channels for organic and locally specific products