Psidium guajava in the Galapagos Islands: Population genetics and history of an invasive species
| Autor: | María de Lourdes Torres, Diego Urquía, Gabriela Pozo, Bernardo Gutierrez, Analía Espín, María José Pozo |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Topography Heredity Population Dynamics Biodiversity Population genetics Invasive Species Introduced species 01 natural sciences Gene flow Islands education.field_of_study Multidisciplinary geography.geographical_feature_category Heterozygosity Ecology Geography Archipelago Medicine Ecuador Genome Plant Research Article Gene Flow DNA Plant Ecological Metrics Science Population 010603 evolutionary biology Ecosystems 03 medical and health sciences Species Colonization Genetics Endemism education Ecosystem Psidium Genetic diversity Landforms Evolutionary Biology Population Biology Ecology and Environmental Sciences Species diversity Genetic Variation Biology and Life Sciences Geomorphology Species Diversity 030104 developmental biology Genetics Population Earth Sciences Introduced Species Population Genetics |
| Zdroj: | PLoS ONE PLoS ONE, Vol 14, Iss 3, p e0203737 (2019) |
| ISSN: | 1932-6203 |
| Popis: | The threat of invasive plant species in island populations prompts the need to better understand their population genetics and dynamics. In the Galapagos islands, this is exemplified by the introduced guava (Psidium guajava), considered one of the greatest threats to the local biodiversity due to its effective spread in the archipelago and its ability to outcompete endemic species. To better understand its history and genetics, we analyzed individuals from three inhabited islands in the Galapagos archipelago with 11 SSR markers. Our results reveal similar genetic diversity between islands, suggestive of gene flow between them. Populations appear to be distinct between the islands of San Cristobal and Isabela, with the population of Santa Cruz being composed as a mixture from both. Additional evidence for genetic bottlenecks and the inference of introduction events suggests an original introduction of the species in San Cristobal, from where it was later introduced to Isabela, and finally into Santa Cruz. Alternatively, an independent introduction event for Isabela is also possible. These results are contrasted with the historical record, providing a first overview of the history of P. guajava in the Galapagos islands and its current population dynamics. |
| Databáze: | OpenAIRE |
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