Results 161 to 170 of about 27,258 (204)

Declining Amphibian Populations

Science, 1991
W T tORLDWIDE DECLINES IN AMPHIBIAN POPULATIONS ATtracted wide attention following a workshop sponsored by the National Research Council (NRC) (1, 2). The declines seem to be general, but some regions and many taxa are apparently unaffected (1). Are the declines due to "normal" climatic fluctuations, which produce droughts and frosts that can severely ...
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Amphibian Declines

2011
"Amphibians are experiencing declines in populations and extinction of species at a rate far beyond any other group in recent times. In spite of the academic awareness of a possible amphibian crisis and continued vigilance in habitat protection and trade, field biologists continued to document decimated populations, extinctions, and malformations of ...
Roarke Donnelly, Joseph Mendelson
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Complex causes of amphibian population declines

Nature, 2001
Amphibian populations have suffered widespread declines and extinctions in recent decades. Although climatic changes, increased exposure to ultraviolet-B (UV-B) radiation and increased prevalence of disease have all been implicated at particular localities, the importance of global environmental change remains unclear.
J M, Kiesecker, A R, Blaustein, L K, Belden   +2 more
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Climate and amphibian declines

Nature, 2001
Various reasons have been proposed for the falling numbers of amphibians in many parts of the world. Changing climate is likely to be a key factor — but with complicated links to the immediate causes of these population declines.
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Deformed Frogs, Declining Amphibians

Internet Reference Services Quarterly, 1999
ABSTRACT Frogs and salamanders have been big in the news in recent years as more and more cases of deformities and declining populations come to light. For those who are interested in finding out more information about declining and deformed amphibians, the Web offers some good places to start.
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A declining amphibian conundrum

Nature, 1998
Worldwide declines in amphibian populations have caused so much concern over the past ten years that a special committee was set up to investigate them. One of the conclusions that this group came to was that there seems to be no single cause that can explain this.
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Declining Amphibian Populations Task Force

2005
NH-Vertebrate Zoology ...
Heyer, W. Ronald, Murphy, James B.
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AMPHIBIAN DECLINES REMAIN A MYSTERY

Chemical & Engineering News Archive, 1998
Scientists generally have assumed that species of plants and animals will thrive in remote areas that are isolated from human impacts. Protecting these isolated habitats from such impacts has been the main tactic governments use to conserve species. But beginning in about 1991, that concept was turned on its head.
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Conservation and declines of amphibians in Croatia

2015
Croatia, as a southeastern European country, is home to 20 amphibian species (13 anurans and 7 caudates), which is a relatively high diversity on the European scale and considering its relatively small area. However, the amphibian fauna of Croatia faces severe threats (as elsewhere on the global scale) and that has resulted in the legal protection of a
Jovanović Glavaš, Olga, Jelić, Dušan
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Ecology. Global amphibian population declines.

Nature, 2001
The decline and disappearance of relatively undisturbed populations of amphibians in several high-altitude regions since the 1970s suggests that they may have suffered a global decline, perhaps with a common cause or causes. Houlahan et al. examined means of trends for 936 amphibian populations and concluded that global declines began in the late 1950s,
R A, Alford, P M, Dixon, J H, Pechmann
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