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The Tropical Andes are a biodiversity hotspot named the "global epicentre of biodiversity" according to the Critical Ecosystem Partnership Fund. [citation needed] The Tropical Andes is an area of rich biodiversity. This location contains about 45,000 plant species of which 20,000 are endemic.
Within the past century, there have been important changes in the climate of the Andean region attributed to climate change. Precipitation has decreased, and due to the Anden region's already arid climate, this decrease in precipitation has led to increasing droughts. [ 5 ]
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 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.
There are two major food chains: The primary food chain is the energy coming from autotrophs and passed on to the consumers; and the second major food chain is when carnivores eat the herbivores or decomposers that consume the autotrophic energy. [16] Consumers are broken down into primary consumers, secondary consumers and tertiary consumers.
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 sparsely populated eastern slopes of the Andes enjoyed abundant precipitation and warmer temperatures than the highlands, but also had agriculture challenges such as steep terrain. This region was important for its tropical crops, bird feathers, gold, and wood. [14] [15] The Incas transported agricultural goods by llama caravan.
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 ...