<unk> s, also called<unk>  webs,<unk>  networks  and/or trophic networks, describe the feeding relationships between species within an ecosystem. Organisms are connected to the organisms they consume by arrows representing the direction of biomass transfer. It also shows you how the energy from the producer is given to the consumer.Typically a<unk>  or<unk>  web refers to a graph where only connections are recorded, and a<unk>  network or ecosystem network refers to a network where the connections are given weights representing the quantity of nutrients or energy being transfered.
Food chain
Flora
Vector 
Vector
Food chemistry
Military medicine
Public health
Surface science