Literaturdatenbank
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Stone, P. A., Hauge, B. J., Scott, F. A., Guyer, C., & Dobie, J. L. (1993). Temporal changes in two turtle assemblages. Journal of Herpetology, 27(1), 13–23.
Added by: Admin (06 Jan 2014 18:23:11 UTC) |
| Resource type: Journal Article BibTeX citation key: Stone1993 View all bibliographic details  |
Categories: General Keywords: Chelydra serpentina, Chelydridae, Chrysemys picta, Emydidae, Habitat - habitat, Kinosternidae, Kinosternon subrubrum, Nordamerika - North America, Schildkröten - turtles + tortoises, Sternotherus odoratus, Trachemys scripta Creators: Dobie, Guyer, Hauge, Scott, Stone Collection: Journal of Herpetology |
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| Abstract |
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Turtle assemblages at two adjacent farm ponds in east-central Alabama were monitored during 1972-1974 and 1988-1990. At pond 1 a drift fence with pitfall traps was constructed during both study periods. Aquatic trapping was conducted in both ponds during both study periods. Pond 1 had been fertilized for 15 consecutive years prior to 1972-1974 but subsequently received no fertilizer. Aquatic vegetation was absent in pond 1 during 1972-1974 but was dense by 1988. Pond 2 had almost no fertilization history and underwent little vegetational change over time. In both study periods pond 1 had a higher density of Kinosternon subrubrum, and both ponds held more K. subrubrum during 1972-1974 than during 1988-1990. Twenty-three K. subrubrum marked during 1972-1974 were still alive during 1988-1990; all but one individual were six years old or older when first captured. Physical condition was inversely proportional to density: individual K. subrubrum during 1972-1974 weighed less per cm than their descendants during 1988-1990, and female K. subrubrum in pond 1 weighed less per cm than females in pond 2. In contrast to K. subrubrum, populations of Trachemys scripta and Chrysemys picta exhibited relatively stable abundances through time. Sternotherus odoratus was the only species to show an obvious increase in abundance with time in both ponds. Chelydra serpentina decreased in abundance in pond 1, while remaining scarce in pond 2. These results may be due to several factors, including colonization, fertilization, cattle grazing, and succession.
Added by: Admin |