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Many species have long roots that may reach 2 meters (6.6 ft) or more into the soil, which can aid slope stabilization, erosion control, and soil porosity for precipitation absorption. Also, their roots can reach moisture more deeply than other grasses and annual plants during seasonal or climatic droughts. The plants provide habitat and food for insects (including Lepidoptera), birds, small animals and larger herbivores, and support beneficial soil mycorrhiza. The leaves supply material, such as for basket weaving, for indigenous peoples and contemporary artists.
^R.H. Groves, R.D.B. Whalley "Grass and Grassland Ecology in Australia" in Flora of Australia Volume 43 Poaceae 1: Introduction and Atlas, CSIRO Publishing, Canberra. "Tussock" grass implies a vertical orientation of the grass clump. In North American usage "Bunch grass" is more specific and defines a clumping, non-rhizomatous or non-stoloniferous growth form, vertical to splayed, and usually perennial with a deeper rooting system than other Poacea.
^Crampton, Beecher. "Grasses in California. University of California Press. Berkeley. 1974. ISBN0-520-02507-5. p. 7 Walker, T.W. 1955 "The Ecology of Tussock Grasslands: Discussion" Proc. NZ Ecol. Soc 3:7 "One fifth of New Zealand carries tussock or bunch grass vegetation, more than other steppes, prairies, or grasslands of the world"
^Walker, T.W. 1955 "The Ecology of Tussock Grasslands: Discussion" Proc. NZ Ecol. Soc 3:7 "One fifth of New Zealand carries tussock or bunch grass vegetation, more than other steppes, prairies, or grasslands of the world"
^Ellsworth and Kauffman, 2010, Native Bunchgrasses Response to Prescribed fire in Ungrazed Grasslands