The Galápagos Islands are home to incredible endemic biodiversity that is of high conservation interest. Two such endemic species are the Galápagos tomatoes: Solanum cheesmaniae and Solanum galapagense . Both are known from historical location records, but like many endemic plant species on the Galápagos, their current conservation status is unclear. We revisited previously documented sites of endemic species on San Cristóbal, Santa Cruz, and Isabela, and document the disappearance of > 80% of these populations. In contrast, we find that two invasive relatives ( Solanum pimpinellifolium and Solanum lycopersicum ) are now highly abundant, and in some cases—based on morphological observations—might be hybridizing with endemics. Our findings suggest that expanding human developments and putative interspecific hybridization are among the major factors affecting the prevalence of invasives and the threatened persistence of the endemic populations.

中文翻译：

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当地灭绝在加拉帕戈斯特有番茄的历史种群中很普遍

加拉帕戈斯群岛拥有令人难以置信的地方性生物多样性，具有高度的保护意义。两种这样的地方性物种是加拉帕戈斯番茄：Solanum cheesmaniae 和 Solanum galapagense。两者都从历史位置记录中得知，但与加拉帕戈斯群岛的许多地方植物物种一样，它们目前的保护状况尚不清楚。我们重新访问了之前记录在案的圣克里斯托瓦尔、圣克鲁斯和伊莎贝拉的地方物种遗址，并记录了这些种群中 80% 以上的消失。相比之下，我们发现两种入侵近亲（ Solanum pimpinellifolium 和 Solanum lycopersicum ）现在非常丰富，并且在某些情况下——基于形态观察——可能与地方病杂交。