Background:

Marqués de Comillas is located in the Lacandona tropical rainforest, Chiapas It suffered land use-change and currently constitutes a fragmented landscape.

Objectives:

Estimate species diversity and spores abundance of arbuscular mycorrhizal fungi in this municipality, in sites following a regeneration gradient and with different canopy openness during dry and rainy seasons.

Methods:

Five random soil samples were collected in each of 12 sites in both seasons (120 samples in total).

Results and conclusions:

Forty nine species of 15 genera were identified. Dominikia minuta and Glomus insculptum were registered for the first time in Mexico. Glomus, Acaulospora, and Ambispora were the most abundant genera. Species diversity and evenness were higher both in dry and rainy season in sites in later successional stages. In dry season sites shared 40% of total species, while during the rainy season they only shared 30%. Analysis of variance showed that the spore abundance was greater in the early regeneration sites. Variation in the arbuscular mycorrhizal fungi community depended on site regeneration stage and marginally on climate variation among seasons.

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