Abstract
Fungal isolation data, from four forest soils, were analyzed using both discriminant analysis and factor analysis, to investigate the structure of fungal communities. The analyses indicated that the forest of origin was a major factor determining fungal community structure in these soils. Discriminant analysis separated the fungal communities of coniferous-forest soil samples from those of deciduous-forest soil samples. The pine-forest soil, which was in an early stage of invasion by hardwoods, had a fungal community intermediate in structure between the extremes. Of the microfungi isolated, Botryotrichum piluliferum, Farrowia seminuda, Geomyces pannorus, Mucor hiemalis, Penicillium janthinellum, Trichoderma polysporum, and Zygorrhynchus moelleri were associated with the coniferous sites, whereas an Acremonium species, Gliomastix murorum, Paecilomyces carneus, Pae. fumosoroseus, Penicillium spinulosum, and Pen. thomii characterized the deciduous-forest soils. Many pine-forest soil fungi were species abundant in the other soils, a possible reflection of the successional stage of the forest. Both factor analysis and discriminant analysis yielded similar interpretations of the data and indicated the importance of fungal interactions in determining community structure. The discriminant analyses also showed that fungal isolation data gave a better separation between the soils of the four forests than did abiotic data.
Published Version
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