Species Richness May Determine the Income from Illicit Wild Orchid Trading in Traditional Markets in Mexico: La riqueza de especies puede determinar el ingreso del comercio ilícito de orquídeas silvestres en mercados tradicionales en México

The orchid trade is an informal activity in Mexico traditionally performed by indigenous people; however, this activity, based on the extraction of wild specimens without a management plan, is sanctioned by environmental laws. Few studies have documented the extraction volumes for illicitly traded orchids, the status of the populations affected by this activity, the socioeconomic profiles of the vendors, or the factors determining income, which are essential for designing strategies to conserve this resource. We documented species richness, abundance, and prices for orchids traded during December in traditional markets in Chiapas, Mexico. The relationships among price, species showiness, and some variables determining income were evaluated. We recorded 28 traded species, all of which were extracted from neighboring, protected, and high-biodiversity forests. The most income was generated from three species, which were also the most abundant in the markets. This trade affects the conservation of two threatened Mexican orchids, but at a state level, it also impacts populations of other species that are not considered at risk. A significant relationship was found between the price of an orchid and its flower size and between the vendor’s income and the quantity of orchids traded by him. The income obtained by a vendor was significantly explained by orchid inflorescence abundance, vendor’s age, and a biodiversity index estimated here.