In recent years, populations of quaking aspen have been in decline in the Western United States. Stands of aspen are now mixed with conifer trees. Each year, fewer aspen-dominated stands exist in Utah and other parts of the Western United States. The scientists in this study wanted to know more about the decline of quaking aspen. They also wanted to know what should be done about reversing aspen decline. This is the Spanish-language version of the article. Topics: Active Forest Management, Fire, Asexual Reproduction, Aspen, Biodiversity, Dendrochronology, Fire suppression, Pando.