Record Details

Aguirre-Munoz, A;Samaniego-Herrera, Araceli;Luna-Mendoza, L;Ortiz-Alcaraz, A;Rodríguez-Malagón, M;Méndez-Sánchez, F;Félix-Lizárraga, M;Hernández-Montoya, J C;González-Gómez, R;Torres-García, F;Barredo-Barberena, J M;Latofski-Robles, M
Island restoration in Mexico: ecological outcomes after systematic eradications of invasive mammals
Island invasives eradication and management
Book Section
C R Veitch, M N Clout and David R Towns
Relevant;Sauromalus sp.
On Mexican islands, 20 island endemic species and subspecies of vertebrates have gone extinct in the last 100 years; all but four of these extinctions were caused by invasive mammals. To prevent more extinctions, 49 populations of 12 invasive mammals were eradicated from 30 Mexican islands. These actions protected 202 endemic taxa – 22 mammals, 31 reptiles, 32 birds, and 117 plants – as well as 227 seabird breeding colonies. An area of 50,744 ha was restored, which represents 10% of Mexico's total island territories. Techniques have ranged from the traditional – trapping and ground hunting – for 26% of the restored area, to the most sophisticated – aerial hunting, aerial broadcast of bait, DGPS and GIS use – for 74% of the restored area. These conservation actions are of high significance for Mexico. Extirpated seabirds have recolonised several islands and increased reproductive success has been documented. An ongoing seabird social attraction project facilitates recolonisation of additional islands. On Guadalupe Island, after the eradication of goats (Capra hircus), recruitment of three endemic trees increased from zero to more than 150,000 individuals. Six native plants, including two endemics, were rediscovered. Ecological outcomes from island restoration are expected to increase. Eradicating all invasive vertebrates from the remaining 41 Mexican islands with 83 populations of invasive mammals is a viable and strategic goal, achievable by 2025, and will set a global benchmark.