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Home NEWS Science News Biology

Predicted Habitat Loss: Over 80% of Amphibian Species in the Pantanal at Risk by 2100

Bioengineer by Bioengineer
March 27, 2025
in Biology
Reading Time: 4 mins read
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By 2100, more than 80% of amphibian species in and around the Pantanal will lose suitable habitat

The Upper Paraguay River Basin, encompassing the vast and ecologically unique Pantanal region, faces dire consequences from climate change, particularly for its amphibian species. A recent study published in the prestigious Journal of Applied Ecology highlights the alarming potential for extensive habitat loss for various anuran species—an umbrella term covering toads, frogs, and tree frogs. By the year 2100, projections indicate that over 80% of these amphibian species could lose the habitats necessary for their survival, demonstrating the precarious state of biodiversity in this sensitive ecosystem.

This study, a collaborative effort between Brazilian and Swiss researchers, utilized a comprehensive database detailing species distributions in conjunction with climate forecasts for the future. Their findings unveil a troubling reality: under the current trajectory of greenhouse gas emissions, the chances of local extinctions in the basin could rise to a staggering 99.87%. If emissions were to increase, the forecast worsens, suggesting that 99.99% of the region’s amphibian population could face extinction.

Matheus Oliveira Neves, the lead author of this indispensable research, conducted this work as a part of his doctoral research with the Federal University of Mato Grosso (UFMT) in Brazil. The substantial implications of these findings call for immediate action, particularly in light of forecasts predicting an increasingly uninhabitable environment for many species reliant on the humid conditions of wetlands and floodplains.

As the researchers delved deeper into the existing conservation frameworks, they uncovered a concerning disparity. The integral conservation units, which account for a mere 5.85% of the territory, protect less than 5% of the geographical distribution of amphibians. This inefficiency underscores the inadequacy of current preservation efforts and the urgent need to reassess and expand these protected areas in anticipation of climate-induced habitat alterations.

The United Nations (UN) Convention on Biodiversity’s recommendation for protecting 30% of the Earth’s surface by 2030 serves as a critical backdrop for this discussion. Presently, efforts have only managed to safeguard approximately 17%, which incorporates both conservation units and indigenous lands. The perceived inadequacy of these areas in terms of biodiversity safeguarding calls into question the efficacy of existing conservation policies and their adaptability to the challenges posed by climate change.

Therefore, the authors advocate the establishment of new conservation units strategically positioned in regions of the Upper Paraguay River Basin that may become more suitable for amphibians in the future climate scenarios. This strategy is crucial for preserving the unique biodiversity that characterizes this area and for fostering resilience among species that are highly dependent on specific hydrological conditions.

Mario Ribeiro Moura, a Brazilian researcher who coordinated the study while associated with the Institute of Biology at the State University of Campinas (IB-UNICAMP), emphasizes the urgent need for expanded conservation areas. He notes that protected environments are currently failing to shield amphibian species from the impending threats of a hotter and drier climate, particularly given the implications that a changing environment has on their ecological roles and survival.

Moura also brings to light two critical scenarios framed by the Intergovernmental Panel on Climate Change (IPCC). The optimistic scenario anticipates that emissions might stabilize at current levels, leading to an average global temperature increase of around 2 °C by the century’s end. Conversely, a pessimistic outlook, characterized by rising emissions, predicts a more severe temperature uptick of up to 4 °C. Both scenarios carry serious implications for biodiversity and the future of species conservation efforts.

The study utilized an expansive dataset, incorporating over 4,000 records from 74 known amphibian species in the Upper Paraguay River Basin—a region that, in addition to the Pantanal, extends into parts of Paraguay and Bolivia. This comprehensive analysis reinforces the proposition that important reservoirs of biodiversity are under siege from climate change.

Examining future environmental conditions, the researchers identified a limited number of areas likely to provide viable habitats for amphibians, regardless of emission scenarios. These locations are situated mainly in the northern sector of the Upper Paraguay River Basin, towards the transition zones of the Cerrado, near Cuiabá, as well as areas southward around Campo Grande and the Paraguayan Chaco. The findings further emphasize that none of the currently protected areas exhibited higher amphibian richness than what is expected under the present climate, highlighting significant gaps in the protection of biodiversity.

The study reveals that while some protected areas might gain species richness in projected future climates, a concerning percentage will likely experience greater losses. Specifically, 13.7% of existing protected zones in the Upper Paraguay River Basin possess the potential to host a number of species that may either thrive or decline under anticipated future climate scenarios.

As the rich biodiversity of the Pantanal faces unprecedented threats, the researchers ardently argue for the establishment of new integral conservation units and the expansion of existing ones. These endeavors must go hand-in-hand with mitigating harmful agricultural practices and prioritizing the restoration of vital aquatic ecosystems, which lie at the heart of the region’s ecological stability.

While the global community seeks to adhere to the goals outlined by the Paris Agreement—namely, to limit global temperature rises to 1.5 °C—recent evidence suggests we may have already surpassed this threshold. As the climate crisis intensifies, it is imperative that a seismic shift occurs in economic models, particularly those rooted in fossil fuel dependency. The stakes are unimaginably high, with the survival of innumerable species and the integrity of complex ecosystems hanging in the balance as society fights to address the growing threats posed by climate change.

Urgent action, grounded in scientific research and collaboration, can provide the framework for safeguarding amphibian populations within the Upper Paraguay River Basin, a task that is not only vital for the preservation of these species but also critical for maintaining the ecological balance of this unique region.

Subject of Research: Impacts of Climate Change on Amphibians in the Upper Paraguay River Basin
Article Title: Climate Change Threatens Amphibians and Species Representation within Protected Areas in Tropical Wetlands
News Publication Date: 15-Jan-2025
Web References: DOI link
References: FAPESP (São Paulo Research Foundation)
Image Credits: Diego Santana

Keywords: Amphibians, Biodiversity conservation, Extinction, Climate change mitigation, Animal habitats, Biodiversity loss, Greenhouse gases

Tags: amphibian population extinction forecastsbiodiversity crisis in Upper Paraguay River Basinclimate change impact on Pantanalcollaborative ecological research Brazil Switzerlandconservation strategies for amphibiansecological study Journal of Applied Ecologyfuture of anuran species by 2100greenhouse gas emissions and biodiversityhabitat loss for amphibian specieslocal extinctions in amphibian populationsthreats to Pantanal ecosystemurgent action for biodiversity preservation

Tags: Amphibian extinction riskAmphibian habitat lossClimate change impact on amphibiansConservation strategies for wetlandsPantanal biodiversity crisis
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