Each fall the monarch butterfly travels thousands of miles to spend the winter in the forests on 12 mountaintops in central Mexico. The monarch migration is the most spectacular two-way migration carried out by an insect.
The forests provide unique microclimatic conditions that allow monarchs to survive the winter. Forest degradation is putting this amazing migration in peril.
The abundance of monarchs shows a discouraging downward trend over the past 20+ years. Click on the graph to enlarge and on this link to read how the numbers were obtained.
In the Spotlight
Dr. Cuauhtémoc Saénz-Romero, in collaboration with Dr. Arnulfo Blanco-García and students Esmeralda Navarro-Miranda, Erika Gómez-Pineda, among others, carried out several experiments related to assisted migration of oyamels in his lab with encouraging results! After one year in the field, an evaluation revealed 96% tree survival rate. Seedlings were originally rescued from natural regeneration sites and grown for two years in a nursery. Afterwards they were planted under the shade of nurse plants on a deforested site. The figure below shows the results.
To read a more detailed description of this experiment please scroll down in the “Scientific Research and Monitoring” section on the Current Projects menu.