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Atlantic Forest's top predator faces a hidden collapse, and protected areas are no longer enough

Phys · · 1214 words · By FAPESP
Human-Wildlife Conflict Wildlife Conservation Ecological Collapse

A study published in Global Ecology and Conservation indicates that jaguars in the South American Atlantic Forest are facing extinction risks due to the scarcity of prey species caused by illegal hunting and human access. The research highlights a contrast between the 'Green Corridor,' where populations are more stable, and coastal regions where prey biomass is critically low.

open_in_new Read the original article: https://phys.org/news/2026-04-atlantic-forest-predator-hidden-collapse.html

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

psychologyDetected Techniques

warning
Loaded Language 70% confidence
Using words with strong emotional connotations to influence an audience.

fact_checkFact-Check Results

10 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

check_circle Corroborated 6
info Single Source 2
help Insufficient Evidence 2
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“the jaguar (Panthera onca) faces another threat that increases its risk of extinction in the South American Atlantic Forest: food scarcity”
CORROBORATED
Multiple independent web sources confirm that food scarcity is a threat increasing the risk of extinction for jaguars in the Atlantic Forest.
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wikipedia NEUTRAL — The Atlantic Forest (Portuguese: Mata Atlântica) is a moist broadleaf forest that extends along the Atlantic coast of Brazil from Rio Grande do Norte state in the northeast to Rio Grande do Sul state …
https://en.wikipedia.org/wiki/Atlantic_Forest
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wikipedia NEUTRAL — Nectomys squamipes, also known as the Atlantic Forest nectomys, South American water rat, or scaly-footed water rat, is a semiaquatic insectivorous rodent species. It is from Argentina, Brazil, and Pa…
https://en.wikipedia.org/wiki/Nectomys_squamipes
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wikipedia NEUTRAL — Sciurus ingrami, usually called Ingram's squirrel in English, is a squirrel found in South America. It is known as serelepe in southeastern Brazil. It is found in the Atlantic Forest Biome of Brazil a…
https://en.wikipedia.org/wiki/Sciurus_ingrami
+ 3 more evidence sources
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“the biome, which covers approximately 15% of Brazil and extends across 17 states in the South, Southeast, and Northeast regions, as well as parts of Argentina and Paraguay”
CORROBORATED
Three independent sources confirm the biome covers approximately 15% of Brazil, spans 17 states, and extends into Argentina and Paraguay.
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web search NEUTRAL — The biome also extends beyond Brazil into parts of Argentina and Paraguay.SOS Mata Atlântica states that the biome covers about 15% of Brazil’s national territory, is present in 17 states, is home to …
https://rioandlearn.com/mata-atlantica-forest/
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web search NEUTRAL — A study indicates that the availability of food for the largest cat in the Americas is a key factor in its presence in conservation areas of the biome, which covers approximately 15% of Brazil.
https://www.myvetcandy.com/news/2026/5/3/decline-in-prey-inc…
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web search NEUTRAL — Why the King of the Atlantic Forest is Starving in Silence: 5 Surprising Takeaways from a New Study. In the emerald depths of the South American Atlantic Forest—a massive biome spanning 17 states and …
https://bigcatrescue.org/conservation-news/atlantic-forest-j…
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“The paper is published in the journal Global Ecology and Conservation”
CORROBORATED
Two independent sources explicitly state the paper was published in the journal Global Ecology and Conservation.
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web search NEUTRAL — The oldest jaguar fossils found in North America date to between 0.85 to 0.82 million years ago. Today, the jaguar's range extends from the Southwestern United States across Mexico and much of Central…
https://en.wikipedia.org/wiki/Jaguar
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web search NEUTRAL — The paper is published in the journal Global Ecology and Conservation.In the Green Corridor, ongoing conservation initiatives such as the Iguaçu Jaguar Project and long-term efforts to combat illegal …
https://phys.org/news/2026-04-atlantic-forest-predator-hidde…
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web search NEUTRAL — The results of the study, which was supported by FAPESP (projects 14/09300–0 and 18/16662–6), were published in an article in the journal Global Ecology and Conservation.
https://www.myvetcandy.com/news/2026/5/3/decline-in-prey-inc…
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“Jaguar prey species, including peccaries (Tayassu pecari), agoutis (Dicotyles tajacu), and deer, are hunted by humans”
CORROBORATED
Two independent sources confirm that humans hunt jaguar prey species, specifically mentioning peccaries (Tayassu pecari), agoutis (Dicotyles tajacu), and deer.
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web search NEUTRAL — The jaguar is threatened by habitat loss, habitat fragmentation, poaching for trade with its body parts and killings in human–wildlife conflict situations, particularly with ranchers in Central and So…
https://en.wikipedia.org/wiki/Jaguar
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web search NEUTRAL — Jaguar prey species, including peccaries (Tayassu pecari), agoutis (Dicotyles tajacu), and deer, are hunted by humans and have dwindled to numbers that likely cannot support viable jaguar populations …
https://www.myvetcandy.com/news/2026/5/3/decline-in-prey-inc…
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web search NEUTRAL — When humans hunt species like the white-lipped peccary (Tayassu pecari), agoutis (Dicotyles tajacu), and various deer, they are effectively starving the jaguar out of existence.
https://bigcatrescue.org/conservation-news/atlantic-forest-j…
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“the biome, which currently has fewer than 300 jaguars”
CORROBORATED
Three independent sources confirm the estimate that fewer than 300 jaguars remain in the Atlantic Forest biome.
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web search NEUTRAL — Empty forests Fewer than 300 jaguars remain in the Atlantic Forest biome, a fragmented corridor running along Brazil's Atlantic coast, according to current estimates. Those populations are ...
https://news.mongabay.com/2026/04/loss-of-prey-could-drive-a…
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web search NEUTRAL — The researchers warn that if this situation worsens, the biome, which currently has fewer than 300 jaguars, could become the first in the world to lose a top predator.
https://phys.org/news/2026-04-atlantic-forest-predator-hidde…
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web search NEUTRAL — Fewer than 300 jaguars remain in the Atlantic Forest biome, a fragmented corridor running along Brazil's Atlantic coast, according to current estimates. Those populations are scattered.
https://focusingonwildlife.com/news/loss-of-prey-could-drive…
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“The study also involved researchers from the Cananeia Research Institute (IPeC), the Chico Mendes Institute for Biodiversity Conservation (ICMBio), as well as its National Center for the Research and Conservation of Carnivorous Mammals (CENAP/ICMBio), the State University of Mato Grosso (UNEMAT), and the Iguaçu Jaguar Project–Pro-Carnivores Institute”
SINGLE SOURCE
The provided web search results for this claim are generic AI study tool advertisements and do not contain any information about the researchers or institutions involved in the study.
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web search NEUTRAL — Need a Study.com Account? Simple & engaging videos to help you learn Unlimited access to 88,000+ lessons The lowest-cost way to earn college credit
https://study.com/academy/login.html
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web search NEUTRAL — Master any subject with Studley AI. Trusted by more than 2,000,000 top students. Create beautiful and interactive notes, flashcards, quizzes and podcasts from any content. Study smarter, not harder.
https://www.studley.ai/
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web search NEUTRAL — StudyX helps students study with AI throughout the entire learning journey. Students can use it to get homework help, turn lectures and study materials into notes, generate flashcards and quizzes for …
https://studyx.ai/
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“The researchers combined information on the jaguar's diet and feeding habits with data obtained through an onsite survey of the feline's prey species. They did this using camera traps distributed across nine protected areas in the Atlantic Forest”
CORROBORATED
Three independent sources confirm the use of camera traps across nine protected areas in the Atlantic Forest to survey prey species and biomass.
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web search NEUTRAL — They did this using camera traps distributed across nine protected areas in the Atlantic Forest. Based on the data, they estimated the abundance and biomass of 14 prey species in these areas, which ha…
https://phys.org/news/2026-04-atlantic-forest-predator-hidde…
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web search NEUTRAL — Researchers conducted camera trap surveys across nine protected areas to measure prey abundance and biomass, focusing on species essential to jaguar diets.[1]. They identified 14 prey species, includi…
https://www.animalsaroundtheglobe.com/atlantic-forest-jaguar…
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web search NEUTRAL — Ferraz and her colleagues assessed jaguar prey species in nine protected areas in the Atlantic Forest. To do so, they carried out the most extensive camera-trap survey ever conducted in this biome.
https://news.mongabay.com/2026/04/loss-of-prey-could-drive-a…
info
“The data reveal a striking difference in biomass between the Green Corridor (638 kg) and the coastal regions (8.2 kg)”
SINGLE SOURCE
Only one source (Big Cat Rescue) provides the specific biomass numbers (638 kg vs 8.2 kg). Another source mentions the difference in biomass but does not provide the specific figures.
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web search NEUTRAL — Jaguars seemed to prefer deer and calves. In Mexico and Central America, neither of the two cats are considered to be the dominant predator.[75] In South America, the jaguar is larger than the cougar …
https://en.wikipedia.org/wiki/Jaguar
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web search NEUTRAL — Prey biomass is significantly higher in less accessible, well-connected regions like the Green Corridor, supporting viable jaguar populations, while coastal areas near urban centers show severe prey d…
https://phys.org/news/2026-04-atlantic-forest-predator-hidde…
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web search NEUTRAL — The Green Corridor: A relative stronghold for the species, maintaining a prey biomass of 638 kg. Coastal Atlantic Forest (e.g., Serra do Mar): A region where jaguars are nearly extinct or entirely abs…
https://bigcatrescue.org/conservation-news/atlantic-forest-j…
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“In 2009, we had between nine and 11 animals, and over the past 15 years, the population has nearly doubled”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results to support or refute the population numbers for Iguaçu National Park in 2009 or since.
help
“Katia Maria Paschoaletto Micchi de Barros Ferraz et al, The loss of prey base may drive the jaguar (Panthera onca) toward extinction in the Atlantic Forest of South America, Global Ecology and Conservation (2026). DOI: 10.1016/j.gecco.2026.e04084”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results to confirm the specific citation, author, or DOI for the 2026 publication.
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.