Quantitative evidence for global amphibian population declines

@article{Houlahan2000QuantitativeEF,
  title={Quantitative evidence for global amphibian population declines},
  author={J. E. Houlahan and C. Scott Findlay and Benedikt Rudolf Schmidt and Andrea H. Meyer and Sergius L. Kuzmin},
  journal={Nature},
  year={2000},
  volume={404},
  pages={752-755}
}
Although there is growing concern that amphibian populations are declining globally, much of the supporting evidence is either anecdotal or derived from short-term studies at small geographical scales. This raises questions not only about the difficulty of detecting temporal trends in populations which are notoriously variable, but also about the validity of inferring global trends from local or regional studies. Here we use data from 936 populations to assess large-scale temporal and spatial… 

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References

SHOWING 1-10 OF 45 REFERENCES

Declining Amphibian Populations

  • D. Wake
  • Environmental Science
    Science
  • 1991
The new data, the most extensive available, raise the possibility that declines are the coincidental effect of population fluctuations, and whether populations decline to local extinction in this area, chances of recovery are high.

Tests of Null Models for Amphibian Declines on a Tropical Mountain

Many of the recent, widespread declines and disappearances of amphibian populations have taken place in seemingly undisturbed, montane habitats. The question of whether the observed patterns differ

Collapse of a Regional Frog Fauna in the Yosemite Area of the California Sierra Nevada, USA

There has been much concern about widespread declines among amphibians, but efforts to determine the extent and magnitude of these declines have been hampered by scarcity of comparative inventory

Declining Amphibian Populations: The Problem of Separating Human Impacts from Natural Fluctuations

Data from 1979 to 1990 for three salamander species and one frog species at a breeding pond in South Carolina showed fluctuations of substantial magnitude in both the size of breeding populations and in recruitment of juveniles, illustrating that to distinguish between natural population fluctuations and declines with anthropogenic causes may require long-term studies.

PUTTING DECLINING AMPHIBIAN POPULATIONS IN PERSPECTIVE: NATURAL FLUCTUATIONS AND HUMAN IMPACTS

Human impacts obviously have reduced or eliminated many populations of am- phibians and other organisms. Recent reports, however, have suggested that declines and disap- pearances of amphibian

Regional Dynamics and the Status of Amphibians

This work assessed the status of 11 amphibian species in southwestern Ontario, Canada, by estimating species richness, changes in presence and absence, and incidence at 97 ponds from 1992 to 1994, and detected a significant reduction in amphibianspecies richness in one of three regions.

Analysis of three amphibian populations with quarter–century long time–series

Only one of the three studied populations showed a negative trend which was probably caused by the introduction of fish, and two populations appeared to be density regulated and Rainfall had no obvious effect on the population fluctuations.

Amphibian Declines: Judging Stability, Persistence, and Susceptibility of Populations to Local and Global Extinctions

It is suggested that many amphibian populations may be unable to recolonize areas after local extinction, due to the physiological constraints, relatively low mobility, and site fidelity of amphibians.

Spatial Scale and Determination of Species Status of the Green Frog

Although the importance of spatial scale in determining species status (abundance and distribution) is widely recognized, most ecological investigations have been conducted at local scales. Our goal

Epidemic Disease and the Catastrophic Decline of Australian Rain Forest Frogs

In the montane rain forests of eastern Australia at least 14 species of endemic, stream-dwelling frogs have disappeared or declined sharply (by more than 90%) during the past 15 years. We review