Project Isabela

Project Isabela
Name	Project Isabela
Location	Galápagos Islands, Ecuador
Start date	1997
End date	2006
Participants	Charles Darwin Foundation, Galápagos National Park Directorate, IUCN, Gordon and Betty Moore Foundation, John D. and Catherine T. MacArthur Foundation, Wildlife Conservation Society, The Nature Conservancy
Target species	Galápagos marine iguana, Galápagos tortoise, black rat, Norway rat, house mouse, guinea pig (as invasive context)
Methods	eradication, aerial baiting, ground baiting, hunting, GPS mapping

Project Isabela was a major invasive-species eradication program conducted in the Galápagos Islands from the late 1990s into the 2000s, targeting introduced mammals that threatened endemic fauna and flora. Coordinated by the Galápagos National Park Directorate with international partners, it used large-scale aerial and ground operations to remove rats and pigs from several islands, aiming to restore ecological integrity for species such as giant tortoises and Darwin's finches. The project became a prominent case study in conservation practice, drawing attention from institutions including the IUCN and foundations supporting biodiversity restoration.

Background and Rationale

The project arose amid growing alarm from researchers at the Charles Darwin Foundation and park managers at the Galápagos National Park Directorate about the impacts of introduced mammals on endemic species such as giant tortoises, medium ground finch, large ground finch, and island vegetation. Historical introductions linked to human settlement and maritime activity included domestic pigs, black rats, Norway rats, and house mice. Previous eradication attempts on smaller islands, informed by lessons from projects involving Antipodes and Macquarie Island, influenced stakeholders including the Gordon and Betty Moore Foundation and The Nature Conservancy to support a coordinated campaign.

Planning and Objectives

Planners convened technical experts from organizations such as the Island Conservation network, the Wildlife Conservation Society, and the IUCN Invasive Species Specialist Group to design operations consistent with international best practices. Objectives specified removal of invasive mammals from targeted islands (notably Isabela Island, Fernandina Island, Pinta Island, and smaller islets) to enable recovery of tortoise populations and native flora including endemic Scalesia species. Detailed logistical planning involved collaboration with the Ecuadorian Navy, Ministry of Environment, aerial contractors, veterinary teams, and legal advisers to ensure compliance with national and multilateral conservation commitments.

Implementation and Methods

Implementation combined aerial distribution of toxic bait, hand-baiting, trapping, hunting with trained teams, and extensive post-operation monitoring. Aerial operations used fixed-wing aircraft and helicopters guided by GPS mapping technologies pioneered in contemporary eradication campaigns; contractors coordinated with scientific observers from the Charles Darwin Foundation and universities such as Princeton University and University of Cambridge. Bait formulations and application protocols followed precedents set by eradication efforts on South Georgia, Kerguelen Islands, and Henderson Island, with risk assessments addressing potential impacts on non-target species like the Galápagos sea lion and blue-footed booby. Ground crews employed snares, traps, and trained sniffer dogs provided by specialist units with experience in island biosecurity; veterinary teams managed welfare issues and carcass removal. Monitoring used mark–recapture studies, camera traps, nest success surveys, and vegetation plots conducted by field technicians, doctoral researchers, and park wardens.

Results and Ecological Impact

Project outcomes included successful eradication of pigs from several targeted islands and dramatic reductions in rat populations in key zones, enabling documented recoveries of native species. Giant tortoise nesting success increased on islands where root trampling and egg predation had previously been severe, as reported by researchers affiliated with the Charles Darwin Foundation and universities. Vegetation recovery was observed in formerly degraded zones, with regeneration of endemic taxa such as Scalesia pedunculata and increases in seedling recruitment noted by botanical surveys. Monitoring programs led by the Galápagos National Park Directorate and partner institutions recorded improved nesting rates for seabirds including blue-footed boobies and population rebounds among some Darwin's finches. Published assessments presented to the IUCN illustrated the project's contributions to achieving parts of Ecuador's biodiversity commitments under international agreements.

Controversies and Criticism

The project provoked debate among conservationists, local stakeholders, and international observers. Critics from organizations including some academic groups and local community representatives raised concerns about the use of rodenticides and powered aerial operations, citing potential non-target mortality affecting species like green sea turtle hatchlings and scavenging mammals. Animal welfare advocates referenced precedents in controversies over eradication methods on islands such as Macquarie Island and South Georgia. Operational transparency, consultation with local communities on Isabela Island and Puerto Ayora, and long-term biosecurity capacity were contested topics in meetings involving the Ecuadorian Congress and international donors. Independent reviews urged enhanced monitoring, adaptive management, and stronger biosecurity measures to prevent reinvasion.

Legacy and Lessons Learned

Project outcomes influenced subsequent island restoration efforts worldwide, informing protocols adopted by groups such as Island Conservation, the IUCN Invasive Species Specialist Group, and governmental agencies in Australia, New Zealand, and the United Kingdom. Lessons emphasized rigorous pre-project risk assessment, community engagement with stakeholders like fishermen and local authorities, robust biosecurity plans, and transparent monitoring published in scientific outlets such as journals affiliated with Nature Publishing Group and Science-family publications. The experience contributed to capacity building within the Galápagos National Park Directorate and strengthened partnerships with foundations including the Gordon and Betty Moore Foundation and MacArthur Foundation, shaping conservation policy in the Galápagos Islands and beyond.

Category:Invasive species eradication Category:Conservation projects in Ecuador