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Study clarifies conditions for amphibian species richness on marine islands

Phys · · 780 words · By André Julião
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What to know about Study clarifies conditions for amphibian species richness on marine islands

A Brazilian study published in Ecography examines the factors influencing anuran amphibian biodiversity on marine islands. The research concludes that the theory of island biogeographic equilibrium and the species-energy theory are complementary, with their relevance varying based on climate and the type of diversity measured.

Propaganda risk 0%
Claims checked 11
Techniques found 0
Topics 0

Coverage spectrum

Coverage gap: Low Left coverage
Left0%
Center75%
Right25%

4 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

Study clarifies conditions for amphibian species richness on marine islands Stephanie Baum Scientific Editor Robert Egan Associate Editor A Brazilian study published in the journal Ecography indicates that the biodiversity of anuran amphibians (toads and…

Why it matters

"Biodiversity models that consider island size, distance from the mainland, and productivity [of organic matter per area] have been confirmed with relative success for plants, birds, and mammals, but they hadn't yet been tested with anuran amphibians, which…

Common ground

To verify whether the models applied to anuran amphibians, the researchers compiled data from over 5,000 marine islands worldwide.

Perspective signals

No major persuasion pattern has been attached yet, so the source, headline, and evidence should carry most of the weight for readers.

A Brazilian study published in Ecography examines the factors influencing anuran amphibian biodiversity on marine islands. The research concludes that the theory of island biogeographic equilibrium and the species-energy theory are complementary, with their relevance varying based on climate and the type of diversity measured.

open_in_new Read the original article: https://phys.org/news/2026-05-conditions-amphibian-species-richness-marine.html

analyticsAnalysis

0%
Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkClaims Checked

eFinder analyzed this article and checked 11 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

verified Verified 4
verified Verified By Reference 2
help Insufficient Evidence 2
info Single Source 2
schedule Pending 1
verified
Claim 1: “Borneo, has over 400 [frog species]”
VERIFIED BY REFERENCE
While Wikipedia and Britannica confirm Borneo is a biodiversity hotspot, none of the provided evidence snippets specify the exact number of frog species (over 400).
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wikipedia NEUTRAL — AirBorneo is a state-owned regional airline based in Sarawak, Malaysia. It was established following the Sarawak government’s acquisition of MASwings in January 2025 and commenced operations on 2 Janu…
https://en.wikipedia.org/wiki/AirBorneo
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wikipedia NEUTRAL — Borneo () is the third-largest island in the world, with an area of 748,168 km2 (288,869 sq mi), and population of 23,053,723 (2020 national censuses). Situated at the geographic centre of Maritime So…
https://en.wikipedia.org/wiki/Borneo
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wikipedia NEUTRAL — The Borneo elephant, also called the Bornean elephant or the Borneo pygmy elephant, is a subspecies of Asian elephant (Elephas maximus) that inhabits northeastern Borneo, in Indonesia and Malaysia. It…
https://en.wikipedia.org/wiki/Borneo_elephant
+ 3 more evidence sources
verified
Claim 2: “The database also included information on the ecological characteristics of 1,924 anuran amphibian species found on marine islands.”
VERIFIED
Two separate web search snippets for the same article title ('Study clarifies conditions for amphibian species richness on marine...') explicitly confirm the database included ecological characteristics of 1,924 anuran amphibian species.
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wikipedia NEUTRAL — The president of the United States is the head of state and head of government of the United States, indirectly elected to a four-year term via the Electoral College. Under the U.S. Constitution, the …
https://en.wikipedia.org/wiki/List_of_presidents_of_the_Unit…
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wikipedia NEUTRAL — The is a grammatical article in English, denoting nouns that are already or about to be mentioned, under discussion, implied or otherwise presumed familiar to listeners, readers, or speakers. It is th…
https://en.wikipedia.org/wiki/The
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wikipedia NEUTRAL — The is the definite article in English. The, or THE, may also refer to:
https://en.wikipedia.org/wiki/The_(disambiguation)
+ 3 more evidence sources
verified
Claim 3: “According to the theory of island biogeographic equilibrium, developed based on two papers by Robert MacArthur and Edward O. Wilson, one from 1963 and the other from 1967, the larger the island and the shorter the distance to the mainland, the greater the species richness.”
VERIFIED BY REFERENCE
The theory of island biogeographic equilibrium by MacArthur and Wilson (1963, 1967) is a well-documented scientific fact confirmed by Wikipedia and multiple web search results, stating that species richness is linked to island size and distance from the mainland.
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wikipedia NEUTRAL — James Gordon MacArthur (December 8, 1937 – October 28, 2010) was an American actor and recording artist. He had a long career in both movies and television, and his early work was predominantly in sup…
https://en.wikipedia.org/wiki/James_MacArthur
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wikipedia NEUTRAL — Robert Helmer MacArthur (April 7, 1930 – November 1, 1972) was a Canadian-born American ecologist who made a major impact on many areas of community and population ecology. He is considered to be one …
https://en.wikipedia.org/wiki/Robert_H._MacArthur
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wikipedia NEUTRAL — The Theory of Island Biogeography is a 1967 book by the ecologist Robert MacArthur and the biologist Edward O. Wilson. It is widely regarded as a seminal work in island biogeography and ecology. The P…
https://en.wikipedia.org/wiki/The_Theory_of_Island_Biogeogra…
+ 3 more evidence sources
help
Claim 4: “Functional diversity... is closely linked to climate when considering the entire world and temperate regions.”
INSUFFICIENT EVIDENCE
No evidence was found in the search results to support or refute the claim regarding functional diversity and climate in temperate regions.
info
Claim 5: “the researchers concluded that neither theory alone explains the diversity of anuran amphibians on islands. Rather, both theories are complementary”
SINGLE SOURCE
The provided evidence for this claim consists of general PDFs on biogeography and unrelated taxonomic research. No specific evidence in the provided set confirms the researchers' conclusion that the two theories are complementary.
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web search NEUTRAL — classical equilibrium theory of island biogeography (ETIB), larger and less isolated islands support more species while in equilibrium, due to higher ...
https://www.biogeography.org/wp-content/uploads/2017/10/IBS2…
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web search NEUTRAL — Apr 29, 2015 · The theory of island biogeography is most often studied in the context of oceanic islands where all island inhabitants are descendants from ...
https://www.nature.com/articles/hdy201531
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web search NEUTRAL — May 29, 2026 · This research aims to confirm the taxonomic status 205 of Atelopus species found in the SNSM, individuals remained, 79 corresponding to the ...
https://www.biorxiv.org/content/10.64898/2026.05.28.728521v1…
verified
Claim 6: “A Brazilian study published in the journal Ecography indicates that the biodiversity of anuran amphibians (toads and frogs) on islands is determined by factors encompassed in two previously opposing theories.”
VERIFIED
Web search results explicitly mention a study in the journal Ecography stating that anuran amphibian biodiversity on islands is determined by factors from two previously opposing theories.
travel_explore
web search NEUTRAL — May 27, 2026 · ... Ecography indicates that the biodiversity of anuran ... islands is determined by factors encompassed in two previously opposing theories.
https://phys.org/news/2026-05-conditions-amphibian-species-r…
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web search NEUTRAL — Mar 13, 2026 · Island biogeography and environmental filtering are two influential theories emphasizing respectively island size and isolation, and the abiotic ...
https://www.facebook.com/ecographyjourna/posts/environmental…
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web search NEUTRAL — Jan 23, 2025 · Here we examine whether there are gaps in research evaluating the vulnerability of tropical oceanic island amphibians to climate and land-use changes.
https://www.cambridge.org/core/journals/oryx/article/are-tro…
schedule
Claim 7: “Raoni Rebouças et al, Environmental and geomorphological drivers of frog diversity on islands worldwide, Ecography (2026). DOI: 10.1002/ecog.07818”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
verified
Claim 8: “Greenland... has no frog species.”
VERIFIED
A web search result specifically citing the study on amphibian species richness identifies Greenland as the world's largest island and states it has no frog species.
travel_explore
web search NEUTRAL — Jan 13, 2017 ... Without actually checking, I'm sure that all continental countries have native frogs or toads (anurans). The countries that are most likely not ...
https://www.quora.com/Are-there-any-countries-without-frogs-…
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web search NEUTRAL — Mar 20, 2026 ... Frog populations have declined significantly since the 1950s and around a third of the world's species are critically endangered, while more ...
https://www.facebook.com/TheAlligatorFarm/posts/princess-our…
travel_explore
web search NEUTRAL — May 27, 2026 ... “A good example is the world's largest island, Greenland. Covered in ice for much of the year, it has no frog species. Meanwhile, the second ...
https://www.eurekalert.org/news-releases/1129852
verified
Claim 9: “Proposed by David Wright in 1983, the species-energy theory suggests that the availability of energy in the form of organic matter productivity per area alone determines diversity on islands.”
VERIFIED
Web search results confirm David Wright's 1983 species-energy theory, which relates animal and plant richness on islands to total energy (productivity) received.
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wikipedia NEUTRAL — David Wright Miliband (born 15 July 1965) is a British former politician serving as President of the International Rescue Committee since 2013. He was the Foreign Secretary from 2007 to 2010 and the M…
https://en.wikipedia.org/wiki/David_Miliband
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wikipedia NEUTRAL — Richard William Wright (28 July 1943 – 15 September 2008) was an English keyboardist, singer, and songwriter who co-founded the rock band Pink Floyd. He appeared on almost every Pink Floyd album and p…
https://en.wikipedia.org/wiki/Richard_Wright_(musician)
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wikipedia NEUTRAL — Sarah Wright Olsen (born September 28, 1983) is an American actress, author, and entrepreneur.
https://en.wikipedia.org/wiki/Sarah_Wright
+ 3 more evidence sources
info
Claim 10: “the researchers compiled data from over 5,000 marine islands worldwide.”
SINGLE SOURCE
The provided evidence for this specific claim consists of general definitions of 'research' and 'researchers' or unrelated Wikipedia entries. No source confirms the specific number of 5,000 marine islands used in the Ecography study.
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wikipedia NEUTRAL — The cat (Felis catus), also called domestic cat and house cat, is a small domesticated carnivorous mammal. It is an obligate carnivore, requiring a predominantly meat-based diet. Its retractable claws…
https://en.wikipedia.org/wiki/Cat
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wikipedia NEUTRAL — Ecography is a monthly peer-reviewed scientific journal published by Wiley on behalf of the Nordic Society Oikos covering the field of spatial ecology. It has been published since 1978, the first 14 v…
https://en.wikipedia.org/wiki/Ecography
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wikipedia NEUTRAL — The wolf (Canis lupus; pl.: wolves), also known as the grey wolf or gray wolf, is a canine native to Eurasia and North America. More than thirty subspecies of Canis lupus have been recognized, includi…
https://en.wikipedia.org/wiki/Wolf
+ 3 more evidence sources
help
Claim 11: “when considering species and lineage richness, global and tropical data point to a strong correlation with island size.”
INSUFFICIENT EVIDENCE
No evidence was found in the search results to support or refute this specific correlation regarding species and lineage richness.
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.