*Diversity of Arbuscular Mycorrhizal Fungi in the Rhizosphere of* Argania spinosa *in Morocco DOI: http://dx.doi.org/10.5772/intechopen.106162*

[28] and variations in pH [29, 30]. Moreover, the structure and dynamic of the AMF community can be influenced by edaphic features, including soil texture and structure, organic matter content, the pH, and macro and micronutrient levels [31, 32]. As pH increases above 7.0 in aqueous solutions, most of the dissolved phosphorus reacts with calcium forming calcium phosphates resulting in a decrease in solubility and availability of phosphate [33, 34]. Indeed, external abiotic factors, such as precipitation or edaphic characteristics, can directly influence the available habitat for a species, which affects an organism's ability to survive in a given location [35]. Furthermore, soil characteristics, such as pH, electrical conductivity, and assimilable phosphorus levels, may also affect the spore number of endomycorrhizal fungi [36].
