Sexually reproducing ascomycetes, especially  Chaetomium spp., have developed resilience by growing thick, dark perithecia. Under desert shrubs, however, more sensitive species such as Gymnoascus reesii'' prevail.
In certain fungal species, sexual reproduction has led to the development of robust, dark structures that enable them to withstand harsh conditions. However, in areas with desert shrubs, more delicate species such as Gymnoascus reesii are able to thrive.