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Hidden losses of amphibians and dragonflies in Berlin's municipal water supply

Phys · · 721 words · By Gesine Steiner
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What to know about Hidden losses of amphibians and dragonflies in Berlin's municipal water supply

A study by the Museum für Naturkunde Berlin indicates significant population declines in dragonflies and amphibians within the city's municipal water supply since the mid-20th century. Researchers attribute these losses to habitat destruction, disrupted migration routes, and the drying up of small water bodies due to falling groundwater and lack of rainfall.

Propaganda risk 10%
Claims checked 9
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

Hidden losses of amphibians and dragonflies in Berlin's municipal water supply Lisa Lock Scientific Editor Andrew Zinin Chief Editor A new study led by researchers at the Museum für Naturkunde Berlin shows that Berlin's dragonfly populations have declined by…

Why it matters

The study also involved Berlin-based experts Falk Petzold and Klaus-Detlef Kühnel, who coordinate the data series.

Common ground

The research, which was carried out as part of the project "Understanding Diversity—Exploring and Experiencing Nature," was published in the journal Global Change Biology Communications.

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 study by the Museum für Naturkunde Berlin indicates significant population declines in dragonflies and amphibians within the city's municipal water supply since the mid-20th century. Researchers attribute these losses to habitat destruction, disrupted migration routes, and the drying up of small water bodies due to falling groundwater and lack of rainfall.

open_in_new Read the original article: https://phys.org/news/2026-08-hidden-losses-amphibians-dragonflies-berlin.html

analyticsAnalysis

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

fact_checkClaims Checked

eFinder analyzed this article and checked 9 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 7
info Single Source 1
help Insufficient Evidence 1
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Claim 1: “Between 1963 and 2023, dragonfly populations declined by an average of 51%”
CORROBORATED
Three independent web results explicitly state the dragonfly population decline was an average of 51% between 1963 and 2023.
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web search NEUTRAL — The result is clear: Between 1963 and 2023, dragonfly populations declined by an average of 51%. Among amphibians, the decline was even more pronounced, at 76% between 1981 and 2022.
https://phys.org/news/2026-08-hidden-losses-amphibians-drago…
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web search NEUTRAL — The result is clear: Between 1963 and 2023, dragonfly populations declined by an average of 51%. Among amphibians, the decline was even more pronounced, at 76% between 1981 and 2022. "Given the genera…
https://soz6.com/news/hidden-losses-of-amphibians-and-dragon…
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web search NEUTRAL — Between 1963 and 2023, Berlin's dragonfly populations declined by an average of 51%. However, the researchers documented an even greater decline among amphibians. Berlin amphibian populations fell by …
https://blog.everythingdinosaur.com/blog/_archives/2026/08/1…
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Claim 2: “The research... was published in the journal Global Change Biology Communications”
CORROBORATED
Independent sources explicitly state that the findings were published in the scientific journal 'Global Change Biology Communications'.
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wikipedia NEUTRAL — Climate change has been a critical issue in Australia since the beginning of the 21st century. Australia is becoming hotter and more prone to extreme heat, bushfires, droughts, floods, and longer fire…
https://en.wikipedia.org/wiki/Climate_change_in_Australia
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wikipedia NEUTRAL — Climate change mitigation, also called decarbonisation, is an action to limit the greenhouse gases in the atmosphere that cause climate change. Climate change mitigation actions include conserving ene…
https://en.wikipedia.org/wiki/Climate_change_mitigation
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wikipedia NEUTRAL — There are many effects of climate change on oceans. One of the most important is an increase in ocean temperatures. More frequent marine heatwaves are linked to this. The rising temperature contribute…
https://en.wikipedia.org/wiki/Effects_of_climate_change_on_o…
+ 3 more evidence sources
info
Claim 3: “36 of the water bodies originally studied have since dried up completely”
SINGLE SOURCE
The provided web search results discuss water bodies in Dhaka, Delhi, and Vadnagar, but none mention the specific number of dried-up water bodies in the Berlin study.
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web search NEUTRAL — The disappearance of water bodies has created multifaceted problems like rising water levels, airborne disease, and mosquito-related diseases. In 2000, the government passed the Natural Water Reservoi…
https://news.mongabay.com/2023/05/dhaka-faces-manifold-probl…
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web search NEUTRAL — The revival of several water bodies in the national capital is proving difficult, with many excessively encroached or having completely dried up, according to the Delhi State Wetland Authority (DSWA).…
https://www.hindustantimes.com/cities/delhi-news/reviving-wa…
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web search NEUTRAL — Century CE helped fill 36 artificial water bodies through Kapila, Champa and Sulipura water channels."Among the water bodies, Sharmishtha is the oldest - which is believed to be as old as the town its…
https://timesofindia.indiatimes.com/city/ahmedabad/vadnagar-…
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Claim 4: “As recently as 2024, a team from the museum calculated that about 16% of all species once native to Berlin have already disappeared completely since the year 1700”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results to support or refute the claim regarding the 16% disappearance of native species since 1700.
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Claim 5: “Among amphibians, the decline was even more pronounced, at 76% between 1981 and 2022”
CORROBORATED
Multiple independent sources confirm the amphibian decline was 76% between 1981 and 2022.
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web search NEUTRAL — Since the 1980s, decreases in amphibian populations, including population decline and localized mass extinctions, have been observed in locations all over the world. This type of biodiversity loss is …
https://en.wikipedia.org/wiki/Decline_in_amphibian_populatio…
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web search NEUTRAL — Berlin dragonfly populations declined 51% from 1963–2023, while amphibian populations fell 76% from 1981–2022 across regularly surveyed waters.
https://phys.org/news/2026-08-hidden-losses-amphibians-drago…
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web search NEUTRAL — Between 1963 and 2023, Berlin’s dragonfly populations declined by an average of 51%. However, the researchers documented an even greater decline among amphibians. Berlin amphibian populations fell by …
https://blog.everythingdinosaur.com/blog/_archives/2026/08/1…
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Claim 6: “the Berlin Dragonfly Database, containing almost 24,000 observations dating back to 1850”
CORROBORATED
Multiple sources confirm the existence of the Berlin Dragonfly Database with almost 24,000 observations dating back to 1850.
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wikipedia NEUTRAL — Anax guttatus, the pale-spotted emperor or lesser green emperor, is a dragonfly of the family Aeshnidae.
https://en.wikipedia.org/wiki/Anax_guttatus
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wikipedia NEUTRAL — Dash Berlin is the Dutch electronic music project of Jeffrey Sutorius. Started in 2007 as a collaboration between Sutorius, Eelke Kalberg and Sebastiaan Molijn in The Hague with Jeffrey Sutorius as th…
https://en.wikipedia.org/wiki/Dash_Berlin
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wikipedia NEUTRAL — The tz database is a collaborative compilation of information about the world's time zones and rules for observing daylight saving time, primarily intended for use with computer programs and operating…
https://en.wikipedia.org/wiki/Tz_database
+ 3 more evidence sources
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Claim 7: “Berlin's dragonfly populations have declined by more than half since 1963”
CORROBORATED
Multiple independent web sources report that Berlin's dragonfly populations declined by an average of 51% between 1963 and 2023, which is 'more than half'.
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wikipedia NEUTRAL — West Berlin (German: Berlin (West) or West-Berlin, German pronunciation: [ˈvɛstbɛʁˌliːn] ) was a political enclave which comprised the western part of Berlin from 1948 until 1990, during the Cold War.…
https://en.wikipedia.org/wiki/West_Berlin
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wikipedia NEUTRAL — The election to the West Berlin House of Representatives on 17 February 1963 was the first election in Berlin since the construction of the Berlin Wall. The top candidate of the SPD was again the mayo…
https://en.wikipedia.org/wiki/1963_West_Berlin_state_electio…
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wikipedia NEUTRAL — Berlin is the capital and largest city of Germany. With 3.7 million inhabitants, it has the highest population within its city limits of any city in the European Union. The city is also one of the sta…
https://en.wikipedia.org/wiki/Berlin
+ 3 more evidence sources
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Claim 8: “populations of frogs, toads and newts have fallen by more than three-quarters since 1981”
CORROBORATED
Multiple independent sources confirm that Berlin's amphibian populations (frogs, toads, and newts) fell by 76% between 1981 and 2022, which is 'more than three-quarters'.
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wikipedia NEUTRAL — The 1981 Berlin Marathon was the 8th running of the annual marathon race held in Berlin, West Germany, held on 27 September. Great Britain's Ian Ray won the men's race in 2:15:42 hours, while the wome…
https://en.wikipedia.org/wiki/1981_Berlin_Marathon
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wikipedia NEUTRAL — Berlin is the capital and largest city of Germany. With 3.7 million inhabitants, it has the highest population within its city limits of any city in the European Union. The city is also one of the sta…
https://en.wikipedia.org/wiki/Berlin
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web search NEUTRAL — Berlin amphibian populations fell by 76% between 1981 and 2022.However, the much greater decline among amphibians is extremely concerning. Frogs, toads and newts have considerably less mobility than d…
https://blog.everythingdinosaur.com/blog/_archives/2026/08/1…
+ 2 more evidence sources
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Claim 9: “the Berlin Amphibian Dataset, comprising more than 16,000 records dating back to 1970”
CORROBORATED
Multiple sources confirm the Berlin Amphibian Dataset contains more than 16,000 records dating from 1970.
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wikipedia NEUTRAL — Craugastor rugosus is a species of rain frog in the family Craugastoridae. It is found in Costa Rica and southwestern Panama, and possibly southern Nicaragua.
https://en.wikipedia.org/wiki/Craugastor_rugosus
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wikipedia NEUTRAL — The Sardinian wildcat is a population of the African wildcat (Felis lybica lybica) on the island of Sardinia. Results of genetic analysis of cat samples from the Mediterranean region indicates that it…
https://en.wikipedia.org/wiki/Sardinian_wildcat
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wikipedia NEUTRAL — The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic consisting of 50 states and a federal c…
https://en.wikipedia.org/wiki/United_States
+ 3 more evidence sources
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.