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Article summary:
| Keywords | Anolis bimaculatus, A. schwartzi, habitat and microhabitat use, structural niche breadth and Overlap |
| Abstract | Anolis schwartzi and A. bimaculatus are St. Christopher Bank endemics. In June 2004, we examined populations of both species at six sites on the The Quill, a dormant volcano on St. Eustatius, in order to: (1) estimate population densities, (2) study microhabitat utilization, and (3) evaluate the structural niche breadths of both species and niche overlaps between species. Estimated population densities were 729-6812/ha for A. schwartzi on the leeward (west-facing) slope and 3201/ha and 4368/ha on the windward slope. Anolis bimaculatus was very rare in our leeward study plots, but we calculated densities of 1042/ha and 1667/ha for extensively insolated plots on the windward slope. Anolis schwartzi effectively utilized all sampled habitats, but preferred those with shade and abundant rocks. On the leeward side, A. schwartzi was most abundant on rocks and litter. On the windward side, both species preferred trunks of trees in the absence of large rocks; however, A. schwartzi appeared to prefer rocks, when available. Perch heights for A. schwartzi and A. bimaculatus were greater at windward than at leeward sites, and A. bimaculatus perched higher than A. schwartzi. Both species used smaller trunks, but A. bimaculatus used larger trees than A. schwartzi, with adult males of both species showing a preference for tree trunks of large diameter. Most individuals in all size classes of both species were in full shade. Niche breadths were generally indicative of habitat generalists and niche overlaps were high for all size classes of both species across all study sites. |
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| Included Refrences | 18 References (List...) |
| Cited by other Articles | 0 Citations (List...) |
| Name | Affiliation | Home page | Total pubs | |
| Diaz PM | Department of Biology, University of Puerto Rico, Rio Piedras, PR 00931, USA | 1 | ||
| Heinz H | Department of Biology, North Carolina State University, Raleigh, NC 27695 USA | 1 | ||
| Parmerlee JrJS | Department of Biology, Haskell Indian Nations University, Lawrence, Kansas 66046 and Department of Biology, Johnson County Community College, Overland Park, Kansas 66210, USA. | 3 | ||
| Powell R | Department of Biology, Avila University, Kansas City, Missouri 64145 | powellr@mail.avila.educ | 14 |
References included in article:
| Order of appearence | Full citation | SRCosmos Link |
| 1 | Cast EE, Gifford ME, Schneider KR, Hardwick AJ, Parmerlee JS, Powell R, 2000. Natural history of an anoline lizard community in the Sierra de Baoruco, Hispaniola. Caribb. J. Sci. 36:258-266. | |
| 2 | De-Palm JP, (ed.). 1985. Encyclopedie van de Nederlandse Antillen. Zutphen: De Walburg Pers. | |
| 3 | Eaton JM, Larimer SC, Howard KG, Powell R, Parmerlee JS, Jr., 2002. Population densities and ecological release of a solitary species: Anolis gingivinus on Anguilla, West Indies. Caribb. J. Sci. 38:27-36. | |
| 4 | Harris BR, Yorks DT, Bohnert CA, Parmerlee JS, Powell R, 2004. Population densities and structural habitats in lowland populations of Anolis Lizards on Grenada. Caribb. J. Sci. 40:31-40. | SRCosmos |
| 5 | Heckel DG, Roughgarden J, 1979. A technique for estimating the size of lizard populations. Ecology 60:966-975. | |
| 6 | Henderson RW, Powell R, 1999. West Indian herpetoecology. In Caribbean Amphibians and Reptiles, ed., B. I. Crother, 223-268. San Diego, California: Academic Press. | |
| 7 | Henderson RW, Powell R, 2001. Responses by the West Indian herpetofauna to human-influenced resources. Caribb. J. Sci. 37:41-54. | SRCosmos |
| 8 | Hurlbert SH, 1978. The measurement of niche overlaps and some relatives. Ecology 59:67-77. | |
| 9 | Lazell JD, Jr., 1972. The anoles (Sauria, Iguanidae) of the Lesser Antilles. Bull. Mus. Comp. Zool. 143:1-115. | |
| 10 | Lenart LA, Powell R, Parmerlee JS, Lathrop A, Smith DD, 1997. Anoline diversity in three differentially altered habitats in the Sierra de Baoruco, Republica Dominicana, Hispaniola. Biotropica 29:117-123. | |
| 11 | Levins R, 1968. Evolution in Changing Environments Some Theoretical Explorations. Princeton, New Jersey: Princeton Univ. Press. | |
| 12 | Pianka ER, 1973. The structure of lizard communities. Ann. Rev. Ecol. Syst. 4:53-74. | |
| 13 | Rojer A, 1997. Biological Inventory of Sint Eustatius. Unpubl. Report, Carmabi Foundation, KNAP Project 96-10. Curacao, Netherlands Antilles. | |
| 14 | Schnabel ZE, 1938. The estimation of the total fish population of a lake. Amer. Math. Monthly 45:348-352. | |
| 15 | Schoener TW, Gorman GC, 1968. Some niche differences in three Lesser Antillean lizards of the genus Anolis. Ecology 49:819-830. | |
| 16 | Schoener TW, Schoener A, 1971. Structural habitat of West Indian Anolis lizards II. Puerto Rican uplands. Breviora (375):1-39. | |
| 17 | Schwartz A, Henderson RW, 1991. Amphibians and Reptiles of the West Indies: Descriptions, Distributions, and Natural History. Gainesville, Florida: Univ. Florida Press. | |
| 18 | Sifers SM, Yeska ML, Ramos YM, Powell R, Parmerlee JS, Jr., 2001. Anolis lizards restricted to altered edge habitats in a Hispaniolan cloud forest. Caribb. J. Sci. 37:55-62. | SRCosmos |