Global declines in amphibian populations in often pristine habitats have led to suggestions that a ubiquitous agent might be involved, such as increased Ultraviolet-B (280-320 nm) radiation due to ozone depletion. The Green and Golden Bell Frog Litoria aurea, has suffered marked population declines and is presently listed as an endangered species in New South Wales. The effect of UV-B levels on hatching success in L. aurea and two sympatric species which have stable populations (L. dentata and L. peronii) was tested at two elevations (sea-level and 600 m) and under three UV-B treatments: 1) unfiltered sunlight, 2) sunlight filtered for UV-B, and 3) sunlight filtered for smaller wavelengths. Hatching success was significantly higher under the UV-B-blocking treatment than under the unfiltered treatment in a repeat experiment involving one L. aurea spawn (p = 0.017), but was not significantly different in the primary experiment involving three L. aurea spawns (p = 0.749). There were no significant differences between elevations or interactions between treatment and elevation in any species. There was a significant difference in survival between species (p = 0.001), with 46% of L. aurea surviving vs 76% each of L. dentata and L. peronii. The lack of a coherent trend in hatching success suggests that UV-B irradiance is not affecting survival in the egg to tadpole stage of L. aurea.
Atkinson, R., Matthews, W., Newman, P. and Plumb, R., 1989. Evidence of the mid-latitude impact of Antarctic ozone depletion. Nature 340: 290-93.
Evidence of the mid-latitude impact of Antarctic ozone depletion
, Nature
, vol. 340
(pg. 290
-93
) Barinaga, M., 1990. Where have all the froggies gone? Science 247: 1033-34.
Where have all the froggies gone?
, Science
, vol. 247
(pg. 1033
-34
) Beaglehole, D. and Carter, G., 1992. Antarctic skies. 1. Diurnal variations of the sky irradiance, and UV effects of the ozone hole, spring 1990. J. Geophys. Res. 97(D2): 2589-96.
Antarctic skies. 1. Diurnal variations of the sky irradiance, and UV effects of the ozone hole, spring 1990
, J. Geophys. Res.
, vol. 97
(pg. 2589
-96
) Blaustein, A. and Wake, D., 1990. Declining amphibian populations: a global phenomenon? Trends Ecol. Evol. 5(7): 203-04.
Declining amphibian populations: a global phenomenon?
, Trends Ecol. Evol.
, vol. 5
(pg. 203
-04
) Blaustein, A., Hoffman, P., Hokit. D., Kiesecker, J., Walls, S. and Hays, J., 1994. UV repair and resistance to solar UV-B in amphibian eggs: a link to population declines? Proc. Natl. Acad. Sci., USA 91: 1791-95.
UV repair and resistance to solar UV-B in amphibian eggs: a link to population declines?
, Proc. Natl. Acad. Sci., USA
, vol. 91
(pg. 1791
-95
) Blumthaler, M. and Ambach, W., 1990. Indication of increasing solar ultraviolet-B radiation flux in alpine regions. Science 248: 206-08.
Indication of increasing solar ultraviolet-B radiation flux in alpine regions
, Science
, vol. 248
(pg. 206
-08
) Blumthaler, M., Ambach, W., Silbernagl, R. and Staehelin, J., 1994a. Erythemal UV-B irradiance (Robertson-Berger sunburn meter data) under ozone deficiencies in winter-spring 1993. Pholochem, Pholobiol. 59(6): 657-59.
Erythemal UV-B irradiance (Robertson-Berger sunburn meter data) under ozone deficiencies in winter-spring 1993
, Pholochem, Pholobiol.
, vol. 59
(pg. 657
-59
) Blumthaler, M., Webb, A., Seckmeyer, G., Bais, A., Huher, M. and Mayer, B., 1994b. Simultaneous spectroradiometry: a study of solar UV irradiance at two altitudes. Geophys. Res. Lea. 21(25): 2805-08.
Simultaneous spectroradiometry: a study of solar UV irradiance at two altitudes
, Geophys. Res. Lea.
, vol. 21
(pg. 2805
-08
) Bruhl, C. and Crutzen, P., 1989. On the disproportionate role of tropospheric ozone as a filter against solar UV-B radiation. Geophys. Res. Lett. 16(7): 703-06.
On the disproportionate role of tropospheric ozone as a filter against solar UV-B radiation
, Geophys. Res. Lett.
, vol. 16
(pg. 703
-06
) Carey, C., 1993. Hypothesis concerning the disappearance of the Boreal Toads from the mountains of Colorado. Cons. Biol. 7(2): 355-62.
Hypothesis concerning the disappearance of the Boreal Toads from the mountains of Colorado
, Cons. Biol.
, vol. 7
(pg. 355
-62
) Cogger, H., 1992. Reptiles and Amphibians of Australia. Revised edition. Reed Books: Chatswood.
,
Reptiles and Amphibians of Australia
Czechura, G. and Ingram, G., 1990. Taudactylus diurnis and the case of the disappearing frogs. Mem. Qld Mus. 29: 361-65.
Taudactylus diurnis and the case of the disappearing frogs
, Mem. Qld Mus.
, vol. 29
(pg. 361
-65
) Daly, G., 1995. Observations on the Green and Golden Bell Frog Litoria aurea (Anura: Hylidae). Herpetofauna 25(1): 2-9.
Observations on the Green and Golden Bell Frog Litoria aurea (Anura: Hylidae)
, Herpetofauna
, vol. 25
(pg. 2
-9
) Fellers, G. and Drost, C., 1994. Decline of anurans in national parks in western United States. Second World Congress of Herpetology: Abstracts. p. 85.
Decline of anurans in national parks in western United States
, Second World Congress of Herpetology: Abstracts
pg. 85
Gillespie, G. R., 1996. Distribution, habitat and conservation status of the Green and Golden Bell Frog Litoria aurea (Lesson 1829) (Anura: Hylidae) in Victoria. Aust. Zool. 30(2): 199-207.
Distribution, habitat and conservation status of the Green and Golden Bell Frog Litoria aurea (Lesson 1829) (Anura: Hylidae) in Victoria
, Aust. Zool.
, vol. 30
(pg. 199
-207
) Gleason, J., Bhartia, P., Herman, J., McPeters, R., Newman, P., Stolarski, R., Flvnn, L., Labow, G., Larko, D., Seftor, C., Wellerneyer, C., Kombyr, W., Miller, A. and Planet, W., 1993. Record low global ozone in 1992. Science 260: 523-26.
Record low global ozone in 1992
, Science
, vol. 260
(pg. 523
-26
) Herman, J. and Larko, D., 1994. Low ozone amounts during 1992-1993 from Nimbus 7 and Meteor 3 total ozone mapping spectrometers. J. Geophys. Rat. 99(D2), 3483-96.
Low ozone amounts during 1992-1993 from Nimbus 7 and Meteor 3 total ozone mapping spectrometers
, J. Geophys. Rat.
, vol. 99
(pg. 3483
-96
) Kerr, J., and McElroy, C., 1993. Evidence for large upward trends of ultraviolet-B radiation linked to ozone depletion. Science 262: 1032-34.
Evidence for large upward trends of ultraviolet-B radiation linked to ozone depletion
, Science
, vol. 262
(pg. 1032
-34
) Lloyd, S., 1993. Stratospheric ozone depletion. Lancet 342: 1156-58.
Stratospheric ozone depletion
, Lancet
, vol. 342
(pg. 1156
-58
) Liu, S., McKeen, S. and Madronich, S., 1991. Effect of anthropogenic aerosols on biologically active ultraviolet radiation. Geophys. Res. Lett. 18(12): 2265-68.
Effect of anthropogenic aerosols on biologically active ultraviolet radiation
, Geophys. Res. Lett.
, vol. 18
(pg. 2265
-68
) Lubin, D. and Frederick, J., 1989. The ultraviolet radiation environment of Antarctica: McMurdo Station during September-October, 1987. J. Geophps. Res. 94(D6): 8491-96.
The ultraviolet radiation environment of Antarctica: McMurdo Station during September-October, 1987
, J. Geophps. Res.
, vol. 94
(pg. 8491
-96
) Lubin, D., Mitchell, G., Frederick, J., Alberts, A., Booth, C., Lucas, T. and Neuschuler, D., 1992. A contribution toward understanding the biospherical significance of Antarctic ozone depletion. J. Geophys. Res. 97(D8): 7817-28
A contribution toward understanding the biospherical significance of Antarctic ozone depletion
, J. Geophys. Res.
, vol. 97
(pg. 7817
-28
) Mims, F. and Frederick, J., 1994. Cumulus Clouds and UV-B. Nature 371: 291.
Cumulus Clouds and UV-B
, Nature
, vol. 371
pg. 291
Osborne, W., 1990. Declining frog populations and extinctions in the Canberra region. Bogong 11(4): 4-7.
Declining frog populations and extinctions in the Canberra region
, Bogong
, vol. 11
(pg. 4
-7
) Osborne, W., 1994. Continuing population declines in the Australian corroboree frog: evidence of a deterioration in climate? Second World Congress of Herpetology: Abstracts, p. 187-88.
Continuing population declines in the Australian corroboree frog: evidence of a deterioration in climate?
, Second World Congress of Herpetology: Abstracts
(pg. 187
-88
) Phillips, K., 1990. Where have all the frogs and toads gone? BioScience 40(6): 422-24.
Where have all the frogs and toads gone?
, BioScience
, vol. 40
(pg. 422
-24
) Pounds, J. and Crump, M., 1994. Amphibian declines and climate disturbance: the case of the Golden Toad and the Harlequin Frog. Cons. Biol. 8(1): 72-85.
Amphibian declines and climate disturbance: the case of the Golden Toad and the Harlequin Frog
, Cons. Biol.
, vol. 8
(pg. 72
-85
) Richards, S., McDonald, K. and Alford, R., 1993. Declines in populations of Australia's endemic tropical rainforest frogs. Pac. Cons. Biol. 1: 66-77.
Declines in populations of Australia's endemic tropical rainforest frogs
, Pac. Cons. Biol.
, vol. 1
(pg. 66
-77
) Roy, C., Gies, H. and Elliott, G., 1990. Ozone depletion. Nature 347(6290): 235-36.
Ozone depletion
, Nature
, vol. 347
(pg. 235
-36
) Trenerry, M., Laurance, W. and McDonald, K., 1994. Further evidence for the precipitous decline of endemic rainforest frogs in tropical Australia. Pac. Cons. Biol. 1: 150-53.
Further evidence for the precipitous decline of endemic rainforest frogs in tropical Australia
, Pac. Cons. Biol.
, vol. 1
(pg. 150
-53
) Tyler, M., 1991. Declining amphibian populations — a global phenomenon? An Australian perspective. Alytes. 9(2): 43-50.
Declining amphibian populations — a global phenomenon? An Australian perspective
, Alytes.
, vol. 9
(pg. 43
-50
) Wake, D., 1991. Declining amphibian populations. Science 253: 860.
Declining amphibian populations
, Science
, vol. 253
pg. 860
Wake, D. and Morowitz, H., 1991. Declining amphibian populations — a global phenomenon? Findings and recommendations. Alytes. 9(2): 33-42.
Declining amphibian populations — a global phenomenon? Findings and recommendations
, Alytes.
, vol. 9
(pg. 33
-42
) White, A., 1995. Green and Golden Bell Frogs. Frogfacts. No. 5: 1-4.
Green and Golden Bell Frogs
, Frogfacts
(pg. 1
-4
)
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