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Terrestrial ecosystems occupy 55,660,000 mi 2 (144,150,000 km 2), or 28.26% of Earth's surface. [5] Major plant taxa in terrestrial ecosystems are members of the division Magnoliophyta (flowering plants), of which there are about 275,000 species, and the division Pinophyta (conifers), of which there are about 500 species.
Mousefood consists of the roots of various tundra plants which are cached by voles, lemmings, or occasionally weasels in burrows. People forage and eat the food that the "mice" have harvested and stored. [1] Elders teach that when collecting mousefood, one should always leave half of the cache for the "mouse".
Template: Antarctica tundra. 2 languages. ... Printable version; In other projects Wikidata item ...
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.
Animal species that are endangered in the tundra include the Arctic fox, caribou, and polar bears. These animals have been endangered due to overhunting, an infestation of disease, loss of diet and habitat due to climate change, and human destructive activities, such as searches for natural gas and oil, mining, and road building. [10]
In physical geography, tundra (/ ˈ t ʌ n d r ə, ˈ t ʊ n-/) is a type of biome where tree growth is hindered by frigid temperatures and short growing seasons. There are three regions and associated types of tundra: Arctic, [2] Alpine, [2] and Antarctic. [3] Tundra vegetation is composed of dwarf shrubs, sedges, grasses, mosses, and lichens ...
Gauthier G, Berteaux D, Bety J, Tarroux A, Therrien J, McKinnon L, Legagneux P, Cadieux M. (2011). The tundra food web of Bylot Island in a changing climate and the role of exchanges between ecosystems1. Ecoscience. 18(3):223. Gruyer N, Gauthier G, Berteaux D. 2008. Cyclic dynamics of sympatric lemming populations on Bylot Island, Nunavut, Canada.