Simon N. Stuart’s research while affiliated with A Rocha International and other places

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Publications (3)


Author Correction: Ongoing declines for the world’s amphibians in the face of emerging threats
  • Article
  • Full-text available

December 2023

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1,154 Reads

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4 Citations

Nature

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Simon N. Stuart
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Geographical pattern of 120 amphibians that improved in status between 1980–2022
Outlined hexagons indicate at least one species improved due to conservation.
The distribution of 2,873 globally threatened amphibian species
The darker colours correspond to higher species richness. The colour scale is based on 10 quantile classes. Maximum richness equals 61 species. The cell area is 865 km². One species was excluded because no spatial data were available.
The types of threats affecting amphibian species in threatened categories
The threats to a species were coded using the threat-classification scheme and grouped for ease of comparison (see the ‘Classification schemes’ and ‘Threats to threatened species’ sections of the Methods). All threats shaded in green are causing habitat loss and degradation. The grey sections denote the number of species for which the threat timing is in the future rather than ongoing. Note that most species are experiencing multiple threats.
Source data
RLIs showing trends in overall extinction risk
a, The RLIs of all comprehensively assessed taxonomic groups on the IUCN Red List. b, The amphibian RLI disaggregated by biogeographical realm. c, The amphibian RLI disaggregated by breeding strategy. d, The amphibian RLI disaggregated by order.
Source data
Geographical pattern of the primary drivers of deteriorating status among amphibians
a,b, The primary drivers of deteriorating status among amphibians during 1980–2004 (482 species; a) and 2004–2022 (306 species; b). Cell colour was determined by the primary driver impacting the most species. Where two primary drivers equally contribute to a cell, an intermediate colour is shown. The stars indicate where the primary driver is undetermined or there are numerous primary drivers. The cell area is 7,775 km².

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Ongoing declines for the world’s amphibians in the face of emerging threats

October 2023

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2,502 Reads

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310 Citations

Nature

Systematic assessments of species extinction risk at regular intervals are necessary for informing conservation action1,2. Ongoing developments in taxonomy, threatening processes and research further underscore the need for reassessment3,4. Here we report the findings of the second Global Amphibian Assessment, evaluating 8,011 species for the International Union for Conservation of Nature Red List of Threatened Species. We find that amphibians are the most threatened vertebrate class (40.7% of species are globally threatened). The updated Red List Index shows that the status of amphibians is deteriorating globally, particularly for salamanders and in the Neotropics. Disease and habitat loss drove 91% of status deteriorations between 1980 and 2004. Ongoing and projected climate change effects are now of increasing concern, driving 39% of status deteriorations since 2004, followed by habitat loss (37%). Although signs of species recoveries incentivize immediate conservation action, scaled-up investment is urgently needed to reverse the current trends.


Ongoing declines for the world’s amphibians in the face of emerging threats

October 2023

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1,799 Reads

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24 Citations

Nature

Systematic assessments of species extinction risk at regular intervals are necessary for informing conservation action1,2. Ongoing developments in taxonomy, threatening processes and research further underscore the need for reassessment3,4. Here we report the findings of the second Global Amphibian Assessment, evaluating 8,011 species for the International Union for Conservation of Nature Red List of Threatened Species. We find that amphibians are the most threatened vertebrate class (40.7% of species are globally threatened). The updated Red List Index shows that the status of amphibians is deteriorating globally, particularly for salamanders and in the Neotropics. Disease and habitat loss drove 91% of status deteriorations between 1980 and 2004. Ongoing and projected climate change effects are now of increasing concern, driving 39% of status deteriorations since 2004, followed by habitat loss (37%). Although signs of species recoveries incentivize immediate conservation action, scaled-up investment is urgently needed to reverse the current trends.

Citations (3)


... Approximately 50% of this reduction in suitability was congruent with the observations of studies that have highlighted the severe impact of climate change on current amphibian populations, which will experience a drastic decline (Falaschi et al. 2019;Gerick et al. 2014;Préau et al. 2019). In particular, climate change is likely to exacerbate the decline in the status of amphibians, especially for species currently in lower extinction risk categories (Luedtke et al. 2023). Although Bombina variegata is classified as "Least Concern" on the IUCN Red List, this species is "Vulnerable" in France and could be one of those species whose status will deteriorate in the near future. ...

Reference:

Elevational range shifts among Bombina toad populations in the Alps in response to future climate change
Author Correction: Ongoing declines for the world’s amphibians in the face of emerging threats

Nature

... https: //doi.org/10.22201/ib.20078706e.2024.95.5367 Introducción Los anfibios son el grupo de vertebrados más amenazados de nuestro planeta, varias son las causas responsables de la disminución de sus poblaciones (Grant et al., 2020;Green et al., 2020;Luedtke et al., 2023). Más de 45% de la diversidad de anfibios del mundo se distribuyen en el Neotrópico (Kacoliris et al., 2022). ...

Ongoing declines for the world’s amphibians in the face of emerging threats

Nature

... Amphibians have permeable skin which can dry out easily, eggs with gelatinous shell, complex life cycles (for example, tadpoles require aquatic habitats and adults require terrestrial habitats) and are ectothermic, which makes them sensitive to changes in temperature and precipitation (Duellman & Trueb 1986). Growing research has examined global climate change's effects on amphibians since the increasing evidence of negative effects in such organisms (Li et al. 2013;Longhini et al. 2021;Luedtke et al. 2023). In ectothermic organisms such as amphibians, in addition to metabolic rates, temperature can affect sensory modalities critical for survival. ...

Ongoing declines for the world’s amphibians in the face of emerging threats

Nature