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A freshwater aquatic food web. The blue arrows show a complete food chain (algae → daphnia → gizzard shad → largemouth bass → great blue heron). A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community.
An interaction web, shown above right, [9] is similar to a topological web, but instead of showing the movement of energy or materials, the arrows show how one group influences another. In interaction food web models, every link has two direct effects, one of the resource on the consumer and one of the consumer on the resource. [10]
Within a food web, a food chain is a succession of organisms that eat other organisms and may, in turn, be eaten themselves. The trophic level of an organism is the number of steps it is from the start of the chain. A food web starts at trophic level 1 with primary producers such as plants, can move to herbivores at level 2, carnivores at level ...
So the flora and fauna are most similar to those of the continent. The island of Tobago is a further 40 km from the northern edge of Trinidad, and its land bridge disappeared 11,500 years ago, but its species mix is similar to the larger island. [1] Over 60% of the island is still covered with closed broadleaf evergreen forest. [3]
Lake Superior food web based on: (2003). "Compartments revealed in food-web structure". ... ISSN 0028-0836. Date: 2009: Source: NOAA Great Lakes Food Web Diagrams ...
The forest floor, relatively clear of undergrowth due to the thick canopy above, is stalked by other animals such as gorillas and deer. [ 1 ] All levels of these forests contain an unparalleled diversity of invertebrate species, including New Guinea 's stick insects and butterflies that can grow over 30 cm (1 ft) in length.
Biomass is the mass of living biological organisms in a given area or ecosystem at a given time. Biomass can refer to species biomass, which is the mass of one or more species, or to community biomass, which is the mass of all species in the community. It can include microorganisms, plants or animals. [3]
A hydrocarbon is any chemical compound that consists only of the elements carbon (C) and hydrogen (H). They all contain a carbon frame, and have hydrogen atoms attached to the frame. Often the term is used as a shortened form of the term aliphatic hydrocarbon. Most hydrocarbons are combustible. [2]