caa a22 4500 477109241 CHVBK 20180405111604.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00029286 doi (NATIONALLICENCE)springer-10.1007/BF00029286 Mycorrhizas in the Kakadu region of tropical Australia [Elektronische Daten] II. Propagules of mycorrhizal fungi in disturbed habitats [M. Bundrett, N. Ashwath, D. Jasper] Bioassays were used to provide estimates of both the distribution and abundance of mycorrhizal fungus propagules in soils from mine sites and natural habitats in tropical Australia. These bioassays measured mycorrhizal formation by bait plants that were grown in intact cores of soil collected along a transect at each site. The mine sites included, had sparse, patchy or dense vegetation cover on waste-rock materials that would initially have been devoid of mycorrhizal fungus propagules. The natural habitats included eucalypt savanna sites which had been subjected to hot annual fires for 4 years or remained unburnt. Propagules of vesicular-arbuscular mycorrhizal (VAM) and ectomycorrhizal (ECM) fungi occurred in all sites, but were sporadically distributed in highly disturbed areas, where they were associated with patches of vegetation. Both the relative abundance and frequency of occurrence of inoculum of VAM and ECM fungi increased with vegetation cover in older disturbed sites. Propagules of VAM fungi were substantially more numerous in some mine site habitats with dense vegetation cover, than in adjacent natural habitats. The presence of substantial amounts of phosphorus, released from weathering rock, in mine waste rock materials may have reduced the requirement of plants for mycorrhizal associations during vegetation establishment in mine sites. In woodland sites, hot annual fires appeared to restrict ECM fungi to infrequent patches in the surface horizon, while ECM fungus inoculum was much more frequently detected in soil from the unburnt site. These fire regimes apparently had less effect on the distribution or quantity of VAM fungus inoculum. Kluwer Academic Publishers, 1996 disturbed mine soils nationallicence ectomycorrhiza nationallicence fire nationallicence propagules or inoculum potential nationallicence tropical plant communities nationallicence vesicular-arbuscular mycorrhiza nationallicence savanna/ecosystems nationallicence Bundrett M. Soil Science and Plant Nutrition, Faculty of Agriculture, The University of Western Australia, 6009, Nedlands, W.A., Australia aut Ashwath N. Environmental Protection Agency, Environmental Research Institute of the Supervising Scientist, Locked Bag 2, 0886, Jabiru, N.T., Australia aut Jasper D. Soil Science and Plant Nutrition, Faculty of Agriculture, The University of Western Australia, 6009, Nedlands, W.A., Australia aut Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl 184/1(1996-03-01), 173-184 0032-079X 184:1<173 1996 184 11104 https://doi.org/10.1007/BF00029286 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00029286 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bundrett M. Soil Science and Plant Nutrition, Faculty of Agriculture, The University of Western Australia, 6009, Nedlands, W.A., Australia aut NATIONALLICENCE 700 1- Ashwath N. Environmental Protection Agency, Environmental Research Institute of the Supervising Scientist, Locked Bag 2, 0886, Jabiru, N.T., Australia aut NATIONALLICENCE 700 1- Jasper D. Soil Science and Plant Nutrition, Faculty of Agriculture, The University of Western Australia, 6009, Nedlands, W.A., Australia aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl// 184/1(1996-03-01), 173-184 0032-079X 184:1<173 1996 184 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer