Conservation actions, such as establishing and managing protected areas, eradicating invasive species, and sustainable ecosystem management, have significantly improved biodiversity or slowed its decline in most cases (66%), compared to taking no action at all. Furthermore, these interventions have been found to be highly effective when implemented, according to a study from Oxford University.
CASE STUDIES IN EFFECTIVE CONSERVATION
One notable example of successful conservation action is the management of invasive predators on Florida’s barrier islands, Cayo Costa and North Captiva. This initiative led to a marked improvement in nesting success for loggerhead turtles and least terns, contrasting starkly with other islands where no predator management was enforced.
Similarly, in the Congo Basin, logging concessions under a Forest Management Plan (FMP) experienced a 74% reduction in deforestation compared to those without an FMP. Protected areas and Indigenous lands in the Brazilian Amazon have also proven effective in reducing deforestation rates and fire density significantly.
Captive breeding and release programs have contributed to the natural population growth of Chinook salmon in Idaho’s Salmon River basin, with minimal negative impacts on the wild population. On average, fish taken into the hatchery produced 4.7 times more adult offspring and 1.3 times more adult second-generation offspring than naturally reproducing fish.
LESSONS LEARNED: EVEN FAILURES CONTRIBUTE
Associate Professor Joseph Bull, a co-author of the study from the University of Oxford’s Department of Biology, emphasized the importance of counterfactual impact evaluation in assessing conservation outcomes. He noted that while ongoing biodiversity declines might dampen optimism, the study’s results offer hope, highlighting the effectiveness of conservation interventions in most cases.
Even in instances where conservation actions fell short, valuable lessons were learned, enabling conservationists to refine their methods. For instance, in India, the physical removal of invasive algae inadvertently spread the algae elsewhere. This setback prompted conservationists to explore alternative strategies for more effective algae removal.
THE FUTURE OF CONSERVATION: CHALLENGES AND OPPORTUNITIES
The study suggests a correlation between more recent conservation interventions and positive biodiversity outcomes, indicating that conservation efforts may be becoming more effective over time, possibly due to increased funding and more targeted interventions.
However, challenges remain, such as unintended consequences like increased predator abundance in protected marine areas impacting species like seahorses. The study underscores the need for continued investment in the effective management of protected areas and calls for further research into the impact of various conservation interventions across different countries and ecosystems.
Dr. Grethel Aguilar, Director General of the International Union for Conservation of Nature (IUCN), hailed the study’s rigorous analysis of conservation outcomes, likening it to applied disciplines like medicine and engineering. She emphasized the importance of transformative change to safeguard nature on a global scale.
The study, titled “The Positive Impact of Conservation Action,” published in Science, was conceived and funded through the International Union for Conservation of Nature (IUCN) by the Global Environment Facility.
