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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.
The presence of the various altitudinal floors of the Andes mountain range in Peru and its proximity to the geographical equator allows the existence of a series of microclimates and species, from areas of usual snowfall to tropical forests; With 84 of the 104 climatic zones on the globe, it is one of the 12 countries in the world with the ...
The Tropical Andes are located in South America following the path of the Andes. They run, mainly, through five countries, Venezuela , Colombia , Ecuador , Peru , and Bolivia . The land initially was roughly 1,258,000 km 2 (486,000 sq mi) but has decreased to 314,500 km 2 (121,400 sq mi), leaving 25% of the original land.
Tropical heat generates unstable air in this area, and air masses become extremely dry due to the loss of moisture during the process of tropical ascent. [1] Hadley cell above Sahara desert. Another significant determinant of tropical desert climate are Hadley cells. Hadley cells concentrate all precipitations in the hotter humid lower pressure ...
Food chain in a Swedish lake. Osprey feed on northern pike, which in turn feed on perch which eat bleak which eat crustaceans.. A food chain is a linear network of links in a food web, often starting with an autotroph (such as grass or algae), also called a producer, and typically ending at an apex predator (such as grizzly bears or killer whales), detritivore (such as earthworms and woodlice ...
The temperate Valdivian, matorral, and Magellanic ecoregions are isolated from the subtropical/tropical forests that dominate northern South America by such landscapes as the Atacama desert (north of the matorral), the Andes Mountains, and the dry, rain-shadow Patagonian steppe east of the Andes.
The numbered steps it takes for the initial source of energy starting from the bottom to reach the top of the food web is called the food chain length. [33] While food chain lengths can fluctuate, aquatic ecosystems start with primary producers that are consumed by primary consumers which are consumed by secondary consumers, and those in turn ...
The Southern Andes in Argentina and Chile, south of Llullaillaco, The Central Andes in Peru and Bolivia, and The Northern Andes in Venezuela, Colombia, and Ecuador. At the northern end of the Andes, the separate Sierra Nevada de Santa Marta range is often, but not always, treated as part of the Northern Andes. [3]