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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.
Knysna-Amatole montane forests – Ecoregion of the tropical and subtropical moist broadleaf forests biome in South Africa KwaZulu-Cape coastal forest mosaic – Subtropical moist broadleaf forest ecoregion of South Africa Pages displaying short descriptions of redirect targets
A food pyramid and a corresponding food web, demonstrating some of the simpler patterns in a food web A graphic representation of energy transfer between trophic layers in an ecosystem. Energy flow is the flow of energy through living things within an ecosystem. [1]
The pyramid of energy represents how much energy, initially from the sun, is retained or stored in the form of new biomass at each trophic level in an ecosystem. Typically, about 10% of the energy is transferred from one trophic level to the next, thus preventing a large number of trophic levels.
Trophic cascades are powerful indirect interactions that can control entire ecosystems, occurring when a trophic level in a food web is suppressed. For example, a top-down cascade will occur if predators are effective enough in predation to reduce the abundance, or alter the behavior of their prey, thereby releasing the next lower trophic level from predation (or herbivory if the intermediate ...
The Nigerian lowland forests, also known as the Nigerian rainforest, are tropical moist forest ecoregion in southwestern Nigeria and southeastern Benin.The ecoregion is densely populated and home to several large cities, including Lagos, Ibadan, and Benin City.
The tropical and subtropical grasslands, savannas, and shrublands are characterized by rainfall levels between 90–150 centimetres (35–59 in) per year. [1] Rainfall can be highly seasonal, with the entire year's rainfall sometimes occurring within a couple of weeks. African savannas occur between forest or woodland regions and grassland regions.
Gnetum africanum (eru or African jointfir) is a species of vine native to tropical Africa. [ 3 ] [ 4 ] [ 5 ] Though bearing leaves, the genus Gnetum are gymnosperms , related to pine and other conifers .