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Vesicular-arbuscular mycorrhizae of weedy and colonizer plant species at disturbed sites in Utah






Oecologia 59(2/3): 296-301

Vesicular-arbuscular mycorrhizae of weedy and colonizer plant species at disturbed sites in Utah

A survey was made of weedy plant species found on disturbed sites in Utah. Of the 74 spp. sampled, 57% were found to contain VA [vesicular arbuscular] mycorrhizae. Mycorrhizal and nonmycorrhizal species strictly followed taxonomic divisions, regardless of growth habit. Nonmycorrhizal species were members of the Amaranthaceae, Brassicaceae, Capparidaceae, Caryophyllaceae, Chenopodiaceae. Papaveraceae, Polygonaceae, Portulacaceae, Rubiaceae and Zygophyllaceae. Cover data were obtained for all plant species, inculding nonweedy species, colonizing 7 of the disturbed sites. Flat semiarid sites were dominated by nonmycorrhizal species. The proportion of mycorrhizal plant cover may be related to water availability. Rocky, sloping sites were dominated by mycorrhizal species. Disturbance by fire did not cause a significant change in the mycorrhizal component of the community.

Accession: 001507374

DOI: 10.1007/bf00378852

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