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News articles on Amphibians

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Mongabay.com news articles on amphibians in blog format. Updated regularly.

Salamanders dying due to common pesticide
(3/25/2007) Atrazine, one of the most widely used pesticides in the United States, may be killing salamanders, according to American biologists writing in the journal Environmental Health Perspectives.


Poisonous tree frog brings hope to indigenous community in the Amazon
(3/19/2007) Used for centuries as a natural disease prevention and physical stimulant, an Amazonian tree frog has become a symbol of Brazil's fight to benefit the Indigenous from scientific developments based on their knowledge.


'Ark' aims to save amphibians from extinction
(2/15/2007) Scientists are meeting in Atlanta is discuss last minute efforts to save disappearing amphibians from extinction. A mysterious outbreak of fungal disease has wiped out an estimated 170 species in the past decade, and put more than one-third of the world's remaining amphibians at risk.


Salamander diversity tied to elevation in the tropics
(2/13/2007) Scientists have long documented high levels of biodiversity at mid-elevation ecosystems in the tropics, but no one has ever conclusively determined the underlying causes of this species richness. A new study, which examined 13 genera and 137 species of tropical salamanders, suggests that this pattern may result from the time when the habitats were first colonized.


Pesticides threaten cloud forests in Costa Rica - new study
(1/21/2007) Pesticides from coffee and banana cultivation are accumulating in Costa Rica's biodiverse cloud forests according to research published earlier this month in Environmental Science & Technology. The findings have implications for conservation efforts in both the Central American country and in other parts of the world.


Poison frogs less toxic when habitat degraded
(10/2/2006) A new study suggests habitat degradation may put some frogs at greater risk of predation by reducing their toxicity. Studying Mantella poison frogs on the island of Madagascar, a team of researchers led by Valerie C. Clark, a chemistry PhD student at Cornell University who earlier this year published a paper describing the origin of frog toxins as being the insects upon which they feed, found that frogs collected from intact forests "consistently have a greater diversity of insect-derived toxins accumulated in their skin than do frogs from disturbed and fragmented forests."


$400-Million Initiative Proposed to Address Amphibian Crisis
(7/9/2006) Fifty of the leading amphibian researchers in the world have called for a new Amphibian Survival Alliance, a $400-million initiative to help reduce and prevent amphibian declines and extinctions -- an ecological crisis of growing proportion that continues to worsen.


Climate change fuels more forest fires in the United States
(7/6/2006) New research says the frequency of large forest fires has increased in the western United States since the mid-1980s as spring temperatures climbed, mountain snows melted earlier and summers got hotter. The new findings, published in the July 6 issue of Science Express, suggest that climate change, not fire suppression policies and forest accumulation, is the primary driver of recent increases in large forest fires.


Frog extinction crisis requires unprecedented conservation response
(7/6/2006) The world's leading amphibian experts are calling for dramatic steps, including the formation of an Amphibian Survival Alliance (ASA), to prevent the massive extinction of amphibians worldwide. Scientists say amphibians -- cold-blooded animals that include frogs, toads, salamanders, newts and caecilians -- are under grave threat due to climate change, pollution, and the emergence of a deadly and infectious fungal disease, which has been linked to global warming. According to the Global Amphibian Assessment, a comprehensive status assessment of the world's amphibian species, one-third of the world's 5,918 known amphibian species are classified as threatened with extinction. Further, at least 9, and perhaps 122, have gone extinct since 1980.


Previously undiscovered species found in Tanzania
(6/22/2006) The first field surveys of the Rubeho Mountains in Tanzania revealed over 160 animal species--including a new species of frog and eleven endemic species--according to an article published in the African Journal of Ecology this month. The findings elevate the importance of protecting this biologically-rich wilderness area and the broader Eastern Arc Mountain range from destructive activities underway such as clear-cutting for agriculture, logging and poaching.


'Extinct' frog rediscovered in Colombia
(5/18/2006) Researchers exploring a Colombian mountain range found surviving members of a species of Harlequin frog believed extinct due to a killer fungus wiping out amphibian populations in Central and South America. The discovery of what could be the last population of the painted frog (Atelopus ebenoides marinkellei) indicates the species has survived the fungus, providing hope that other species also might avoid elimination from the epidemic caused by a pathogenic fungus of unknown origin.


In tungara frogs, female choice for complex calls led to evolution of unusual male vocal cord
(5/3/2006) Male tropical tungara frogs have evolved masses on their vocal cords that help them woo females with complex calls, show scientists working at the Smithsonian Tropical Research Institute (STRI) in Panama.


16,119 species at risk of extinction
(5/2/2006) The number of known threatened species reaches 16,119. The ranks of those facing extinction are joined by familiar species like the polar bear, hippopotamus and desert gazelles; together with ocean sharks, freshwater fish and Mediterranean flowers. Positive action has helped the white-tailed eagle and offers a glimmer of hope to Indian vultures. The total number of species declared officially Extinct is 784 and a further 65 are only found in captivity or cultivation. Of the 40,177 species assessed using the IUCN Red List criteria, 16,119 are now listed as threatened with extinction. This includes one in three amphibians and a quarter of the world's coniferous trees, on top of the one in eight birds and one in four mammals known to be in jeopardy


6 species of frogs discovered in Laos
(4/20/2006) Six new species of frogs have been discovered in the Southeast Asia nation of Lao PDR, according to the Bronx Zoo-based Wildlife conservation Society (WCS). Three newly discovered frog species are described in the recent issue of Copeia, the journal of the American Society of Herpetologists and Ichthyologists. WCS says that little is known about the new frogs, other than the location they were found and how the compare morphologically to similar species.


Harmless frogs gain protection by mimicking toxic species
(3/13/2006) When predators learn to avoid a highly toxic frog, they generalize, and this allows a harmless frog to mimic and be more abundant than a frog whose poison packs less punch, biologists at The University of Texas at Austin studying poison dart frogs in the Amazon have discovered.


Pictures of new species discovered in New Guinea
(2/7/2006) A team of scientists led by conservation International (CI) found dozens of new species in a survey of New Guinea's Foja Mountains. The December 2005 trip by a team of U.S., Indonesian, and Australian scientists discovered new species of frogs, butterflies, plants, and an orange-faced honeyeater, the first new bird from the island of New Guinea in more than 60 years.


Fungus may be devastating amphibian populations worldwide
(2/6/2006) Her most likely culprit is a hugely infectious disease caused by a fungus. In just four months -- from mid-September of 2004 to mid-January of 2005 -- Lips and her colleagues saw more than half the amphibian population of El Cope, Panama, sicken and die from this disease.


Fungus may be devastating amphibian populations worldwide
(2/6/2006) Her most likely culprit is a hugely infectious disease caused by a fungus. In just four months -- from mid-September of 2004 to mid-January of 2005 -- Lips and her colleagues saw more than half the amphibian population of El Cope, Panama, sicken and die from this disease.


Extinctions linked to climate change
(1/11/2006) A new report that links global warming to the recent extinction of dozens of amphibian species in tropical America is more evidence of a large phenomena that may affect broad regions, many animal species and ultimately humans, according to researchers at Oregon State University.


Climate change is killing frogs finds new research
(1/11/2006) The dramatic global decline of amphibians may be directly connected to global warming warns a new study published in the journal Nature.


Pantanal, the world's largest wetland, disappearing finds new report
(1/10/2006) Deforestation has destroyed 17 percent of the Pantanal, the world's largest wetland, according to a new report from conservation International. The Pantanal, an area of flooded grassland and savanna covering 200,000 square kilometers during the rainy season, includes parts of Brazil, Paraguay, and Bolivia and is fed by the Rio Paraguay. The wetland is home to some 3500 species of plant and 650 species of birds. About 125 types of mammals, 180 kinds of reptiles, 41 types of amphibians, and 325 species of fish have been found in the region. The Pantanal in an important source of freshwater to neighboring farming areas and downstream urban areas.


Salamanders feed on bat guano in cave system
(11/21/2005) A species of blind, cave-dwelling salamander in Oklahoma feeds on bat guano according to research published in Proceedings of the Royal Society and presented on the online version of Nature.


Frogs may help in fight against HIV
(10/1/2005) A new weapon in the battle against HIV may come from an unusual source -- a small tropical frog. Investigators at Vanderbilt University Medical Center reported this month in the Journal of Virology that compounds secreted by frog skin are potent blockers of HIV infection.


conservation scientists want $404 million to save disappearing amphibians
(9/20/2005) Yesterday conservation scientists proposed a $404 million effort to preserve declining global amphibian poplations. The strategy would call for funding from governments, private institutions and individual donors to finance long-term research, protect critical habitats, reduce the trade in amphibians for food and pets, and establish captive breeding programs.


How to save disappearing amphibians subject of meeting this weekend
(9/14/2005) Scientists are meeting this weekend to discuss strategies for addressing the global decline of amphibians. Earlier this year, the Global Amphibian Assessment, a survey of the planet's amphibian species, found that nearly a third (32%) of the world's amphibian species are threatened and 129 species have gone extinct since 1980.


Convergent Evolution of Poison Frogs and Ants
(8/10/2005) A steady diet of ants may have driven the convergent evolution of poisonous frogs in Madagascar and the Americas, researchers report.


Study discovers why poison dart frogs are toxic
(8/9/2005) A new study published in the current issue of The Proceedings of the National Academy of Sciences reports that poison dart frogs, as well as the Mantella poison frogs of Madagascar, derive their toxicity from the ants they eat. Specifically, both groups are frogs are capable of storing ants' toxic alkaloid molecules in their glands without being harmed.


16% of frogs species in Sri Lanka may be gone, new survey finds
(7/2/2005) In a study published Thursday in Raffles Bulletin of Zoology, researchers confirmed the discovery of 35 new frog species in Sri Lanka over the past decade brining the number of frog species in the island country to 105. However, the survey found that 17 of these species have disappeared and at least another 11 face imminent extinction unless their habitat is protected.


Toad on brink of extinction, scientists race to study for bioactive compounds
(6/29/2005) Following the construction of a dam in Tanzania, the Kihansi Spray Toad sits on the brink of extinction. Scientists are racing to study the amphibian for bioactive compounds with potential medical applications.


Cane toads increasingly a problem in Australia
(4/17/2005) Cane toads increasingly a problem in Australia


Rainforest Canopy - Amphibians, Reptiles, Invertebrates
(3/1/2005) Frogs are overwhelmingly the most abundant amphibians in the rainforest. Unlike temperate frogs that are mostly limited to habitats near water, tropical frogs are most abundant in the trees, and relatively few are found near bodies of water on the forest floor. The reason for this is quite simple: frogs must always keep their skin moist since almost half of their respiration in carried out through the skin. The high humidity of the rainforest and frequent rainstorms gives tropical frogs infinitely more freedom to move into the trees and escape the many predators of rainforest waters. The differences between temperate and tropical frogs extend beyond their habitat. Whereas nearly all temperate frogs lay their eggs in water, the majority of rainforest species place eggs in vegetation or lay them in the ground. By leaving the water, frogs avoid egg-predators like fish, shrimp, aquatic insects, and insect larvae. Several species of frogs, including the American glass frogs, lay their eggs on vegetation that overhangs water. The humid climate keeps the eggs moist and when the tadpoles hatch they drop into the water below. Glass frogs are also interesting because they are transparent except for their visible organs and the faint yellow spots that some species possess. These yellow spots resemble a cluster of the frog's eggs, enough to fool predators. Other frog species develop fully into froglets within their eggs, and emerge as fully formed frogs, thus by-passing the tadpole stage altogether..


Ground Reptiles and Amphibians
(3/1/2005) The most abundant vertebrate predators of the forest floor are reptiles, namely snakes and lizards. Best known of forest snakes are the giant constrictors, pythons of the Old World and Australasia, and boas of New World, but many of these are arboreal, aquatic, or relatively small. The majority of the snakes of the forest floor are small to medium sized, nocturnal, and mildly poisonous. They eat a range of amphibians, mammals, small birds, and insects. Very few of these species pose a threat to humans, although some are notorious for inflicting bites. The fer-de-lance viper of the New World, cobras of the Old World, and bushmaster of the New World are well-known examples.



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