Orchid mycorrhiza allowed for the identification of specific taxa forming symbiotic relationships which are of interest in the study, cultivation, and conservation of orchids. This is especially important in the trade and preservation endangered species or orchids of commercial value like the vanilla bean. There have been seen trends in the type of symbioses found in orchids, depending primarily on the life-style of the orchid, as the symbiosis is primarily of benefit to the plant. Terrestrial orchids have been found to commonly associate with Tulasnellaceae, however some autotrophic and non-autotrophic orchids do associate with several ectomycorrhizal fungi. Epiphytic fungi, however, may associate
Mexican Repatriation own identities. Repatriation was not evenly geographically distributed, with midwestern Mexicans being only 3% of the overall US Mexican population but perhaps 10% of repatriates. Besides coverage in local newspapers and radio, deportation was frequent enough that it was reflected in the lyrics of Mexican popular music. Even before the Wall Street crash, a variety of "small farmers, progressives, labor unions, eugenicists, and racists" had called for restrictions on Mexican immigration. Their arguments focused primarily on competition for jobs, and the cost of public assistance for indigents. These arguments continued after the beginning of the Great Depression. For example, in