Climate Variability in Regions of Amphibian Declines

Conservation Biology - Tập 15 Số 4 - Trang 930-942 - 2001
Michael A. Alexander1, Jon Eischeid1
1Climate Diagnostics Center, National Oceanic and Atmospheric Administration–Cooperative Institute for Research in Environmental Sciences, Mail Code R/CDC1, 325 Broadway, Boulder, CO 80305–3328, U.S.A.

Tóm tắt

Abstract: We explored the relationship between amphibian declines and climate variations in Colorado (U.S.A.), Puerto Rico, Costa Rica–Panama, and Queensland (Australia) through two sources of data: output from the National Center for Environmental Prediction “reanalysis system” and area‐averaged station data. The reanalysis system merges observations from airplanes, land stations, satellites, ships, and weather balloons with output from a weather‐forecast model to create global fields of atmospheric variables. Station data consisted of temperature and precipitation measured with thermometers and rain gauges at fixed locations. Temperatures were near normal in Colorado when the amphibian declines occurred in the 1970s, whereas in Central America temperatures were warmer than normal, especially during the dry season. The station data from Puerto Rico and Australia indicated that temperatures were above normal during the period of amphibian declines, but reanalysis did not show such a clear temperature signal. Although declines occurred while the temperature and precipitation anomalies in some of the regions were large and of extended duration, the anomalies were not beyond the range of normal variability. Thus, unusual climate, as measured by regional estimates of temperature and precipitation, is unlikely to be the direct cause of amphibian declines, but it may have indirectly contributed to them. Previous researchers have noted that the declines appear to have propagated from northwest to southeast from Costa Rica to Panama and from southeast to northwest in Queensland, Australia. Wind has the potential to transport pathogens that cause amphibian mortality. The mean direction of the near‐surface winds tended to parallel the path of amphibian declines from July–October in Central America and from May–July in Australia. The wind direction was highly variable, however, and the propagation rate of amphibian declines was much slower than the mean wind speed. In addition, the most likely pathogen is a chytrid fungus that does not produce desiccation‐resistant spores. Thus, if wind is involved in the propagation of amphibian declines, it is through a complex set of processes.

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Tài liệu tham khảo

10.1126/science.222.4629.1203

10.1038/374219a0

Berger L., 1999, Chytridiomycosis. A new disease of wild and captive animals., Australian and New Zealand Council for the Care of Animals in Research and Teaching Newsletter, 11, 1

10.1073/pnas.95.15.9031

Berger L., 1999, Declines and disappearances of Australian amphibians, 21

10.1046/j.1523-1739.1993.07020355.x

10.2307/3454639

10.1046/j.1523-1739.2001.015004903.x

Carleton A. M., 1991, Satellite remote sensing in climatology

10.1175/1520-0442-11.8.2016

10.2307/1563742

10.1175/1520-0450(1995)034<2787:TQCOLT>2.0.CO;2

10.1016/0006-3207(93)90447-9

10.2307/1939865

Glynn P. W., 1990, Global ecological consequences of the 1982–83 El Niño–Southern Oscillation

10.1029/97JC00463

10.2307/2388238

10.1175/1520-0442(1996)009<2222:SVSEOA>2.0.CO;2

10.1175/1520-0442(1998)011<0945:DIORTT>2.0.CO;2

Ingram G. J., 1990, The mystery of the disappearing frogs., Wildlife Australia, 27, 6

Intergovernmental Panel on Climate Change, 1996, Climate change 1995, the science of climate change

10.1175/1520-0442(1999)012<3335:COAGSR>2.0.CO;2

Joglar R. L., 1996, Declining amphibian populations in Puerto Rico. Contributions to West Indian herpetology, a tribute to Albert Schwartz., Contributions to Herpetology, 12, 371

10.1175/1520-0477(1996)077<0437:TNYRP>2.0.CO;2

10.1175/1520-0442(1989)002<1069:GCAAWE>2.0.CO;2

10.1175/1520-0442(1998)011<2273:MAODVA>2.0.CO;2

10.1016/0006-3207(95)00142-5

10.1046/j.1523-1739.1996.10020406.x

10.1046/j.1523-1739.1997.97109.x

10.1046/j.1523-1739.1998.96359.x

10.1046/j.1523-1739.1999.97185.x

10.1175/1520-0477(1997)078<1069:APICOW>2.0.CO;2

10.1139/f86-057

10.1002/joc.3370040407

10.1016/0140-6736(93)92368-4

10.1029/96GL03166

10.2151/jmsj1965.67.3_375

10.1071/WR9890537

10.1038/382765a0

10.1177/104063879901100219

10.1175/1520-0477(1997)078<2837:AOOTGH>2.0.CO;2

10.1016/0967-0637(95)00075-H

10.1046/j.1523-1739.1994.08010072.x

10.1038/19297

10.1175/1520-0442(1997)010<2351:AEOAAV>2.0.CO;2

10.1175/1520-0442(1994)007<0929:IGSSTA>2.0.CO;2

10.1175/1520-0442(1988)001<0172:PVOTCA>2.0.CO;2

Rome R. C., 1992, Environmental Physiology of the Amphibians, 183

Shoemaker V. H., 1992, Environmental physiology of the amphibians, 125

10.1175/1520-0442(1993)006<1301:GOPFTM>2.0.CO;2

10.7589/0090-3558-35.1.49

10.1029/95GL03602

10.1029/97GL03092

10.1071/PC940150

10.1126/science.238.4823.70

Vose R. S. R. L. Schmoyer P. M. Steurer T. C. Peterson R. Heim T. R. Karl and J. Eischeid. 1992. The Global Historical Climatology Network: long‐term monthly temperature precipitation sea level pressure and station pressure data. ORNL/CDIAC‐53 NDP‐041. National Climate Data Center Asheville North Carolina.

10.1080/01650528909360795

10.1175/1520-0477(1999)080<0245:TIOSCR>2.0.CO;2

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Conservation Biology

Tập 15 Số 4

930-942

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