01545nas a2200145   4500008004100000245010700041210006900148300001300217490000700230520098200237653002201219100001701241700002001258856012101278       1988                        eng d00aTopographic and fire effects on composition and abundance of VA-mycorrhizal fungi in tallgrass prairie0 aTopographic and fire effects on composition and abundance of VAm  a433 -4410 v803 a<p>The species composition of vesicular- arbuscular mycorrhizal fungi (VAM) are described from experimental plots in tallgrass prairie at Konza Prairie Research Natural Area, Manhattan, Kansas. Treatments include topography (four positions downslope) and burning frequency (annually burned and infrequently burned). Multivariate and univariate analyses indicate that gradients of variation in VAM species are related primarily to topography and burning frequency, and secondarily to original plot position within experimental rows. Spore numbers of seven of the most abundant species are directly related to topography; three of these also show an interaction with burning frequency. Although the distinction between direct and indirect effects of topography and burning frequency cannot be made with these data, a parallel response of vascular plant species frequency to the topographic gradient was observed. Key words: fire, tallgrass prairie, topography, VA mycorrhizae</p>10atallgrass prairie1 aGibson, D.J.1 aHetrick, B.A.D.  uhttp://knz.lternet.edu/content/topographic-and-fire-effects-composition-and-abundance-va-mycorrhizal-fungi-tallgrass