A flood is an overflow of water that submerges land which is usually dry. The European Union (EU) Floods Directive defines a flood as a covering by water of land not normally covered by water.
A food chain is a linear series of links starting with one specific species that eats no other species in the web, and endling with a specific species that eaten by no other species in the web.That's different from a food web. For more information, please access the related link listed below.f there are six in the food chain it will go like this: 1  The sun gives energy to the green plant (this is called the producer) ie: grass, 2  the grass is then eaten by the rabbit (which is known as a primary consumer) and then. 3  the rabbit (called the secondary consumer) is then eaten by the fox (called the carnivore).
A food chain differs from a food web, because the complex network of different animals ' feeding relations are aggregated and the chain only follows a direct, linear pathway of one animal at a time. A common metric used to quantify food web trophic structure is food chain length.In its simplest form, the length of a chain is the number of links between a trophic consumer and the base of the web and the mean chain length of an entire web is the arithmetic average of the lengths of all chains in a food web.his food web of waterbirds from Chesapeake Bay is a network of food chains. Food chains are directional paths of trophic energy or, equivalently, sequences of links that start with basal species, such as producers or fine organic matter, and end with consumer organisms.