AMF Diversity of Different Larix gmelinii Forest Types in the Great Xinganling Mountains

Abstract:

The diversity of arbuscular mycorrhizal fungi (AMF) associated with Larix gmelinii forest were investigated in the Great Xinganling mountains Inner Mongolia. Five different Larix gmelinii forest types and L. gmelinii forest burned areas were surveyed. Of the 53 AM fungal species belonging to four genera isolated from 90 soil samples, 25(47.17%) belonged to Acaulospora, 23(43.40%) to Glomus, 4(7.55%) to Entrophospora, and 1(1.89%) to Gigaspora. Acaulospora and Glomus were the dominant genera. A. lacunosa was dominant species of Ledum palustre-L. gmelinii virgin forest; A. lacunosa was the most common species of Herbage-L. gmelinii forest; Acaulospora sp. 3 and G. constrictum were the dominant species of Betula fruticosa-L. gmelinii forest; A. spinosa was dominant species of L. gmelinii clearcutting forest; Glomus sp. 3 was dominant species of L. gmelinii shelterwood; A. spinosa was dominant species of L. gmelinii forest burned areas. Of the five forest types, Betula fruticosa-L. gmelinii virgin forest had the most big spore densities, species richness, Shannon-Wiener index and Simpson index. The spore densities had significant positive correlation with organic matter in the soil; while the spore richness had significant positive correlation with available P.