| Автор | Stokes, C.J. |
| Автор | Yeaton, R.I. |
| Дата выпуска | 1994 |
| dc.description | AbstractA plotless vegetation sampling technique (ellipse‐intercept method) is described and its accuracy and precision compared by simulation models with two other line‐based techniques: line‐intercept and a point‐intercept method (which measure species covers). The ellipse‐intercept method provides three measures of plant abundance (percentage cover, density and intercept frequency) and also provides plant size distributions, yet requires no more sampling effort than the line‐intercept method. A field test of the three techniques in succulent karoo, showed that the discriminating power per metre of ellipse‐intercept survey (for all three abundance measures) is the same as that of each metre of line‐intercept survey or each four points of point‐intercept survey. The additional ellipse‐intercept information of plant densities and size distributions is shown to be useful for interpreting vegetation differences and for revealing differences (e.g. in vegetation dynamics) not detectable by measures of species covers alone. |
| Формат | application.pdf |
| Издатель | Taylor & Francis Group |
| Копирайт | Copyright Taylor and Francis Group, LLC |
| Тема | Ellipse‐intercept method |
| Тема | line‐intercept method |
| Тема | point‐intercept method |
| Название | A line‐based vegetation sampling technique and its application in succulent karoo |
| Тип | research-article |
| DOI | 10.1080/10220119.1994.9638348 |
| Electronic ISSN | 1727-9380 |
| Print ISSN | 1022-0119 |
| Журнал | African Journal of Range & Forage Science |
| Том | 11 |
| Первая страница | 11 |
| Последняя страница | 17 |
| Аффилиация | Stokes, C.J.; Department of Botany and UNP/FRD Research Unit for Plant Growth and Development, University of Natal |
| Аффилиация | Yeaton, R.I.; Department of Botany and UNP/FRD Research Unit for Plant Growth and Development, University of Natal |
| Выпуск | 1 |
| Библиографическая ссылка | Archibald, EEA. 1948. Plant populations I. A new application of Neyman's contagious distribution. Annals of Botany, 12: 221–235. |
| Библиографическая ссылка | Cormack, RM, Patil, GP and Robson, DS. 1979. Statistical ecology. Vol. 5: Sampling biological populations, Fairland: International Co‐operative Publishing House. |
| Библиографическая ссылка | Cottam, G, Curtis, JT and Hale, BW. 1953. Some sampling characteristics of a population of randomly dispersed individuals. Ecology, 30: 101–104. |
| Библиографическая ссылка | Cottam, G and Curtis, JT. 1956. The use of distance measures in phyto‐sociological sampling. Ecology, 37: 451–460. |
| Библиографическая ссылка | De Vries, PG. 1979. “Line intersect sampling ‐ statistical theory, applications, and suggestions for extended use in ecological inventory”. In Statistical ecology. Vol. 5: Sampling biological populations, Edited by: Cormack, RM, Patil, GP and Robson, DS. 9–70. Fairland: International Co‐operative Publishing House. |
| Библиографическая ссылка | Digby, PGN and Kempton, RA. 1987. Multivariate analysis of ecological communities, London: Chapman & Hall. |
| Библиографическая ссылка | Gauch, HG. 1982. Multivariate analysis in community ecology, Cambridge: Cambridge University Press. |
| Библиографическая ссылка | Moore, PG. 1954. Spacing in plant populations. Ecology, 35: 222–227. |
| Библиографическая ссылка | Morisita, M. 1957. A new method for the estimation of density by the spacing method applicable to non‐randomly distributed populations. Physiology and Ecology, 7: 134–144. |
| Библиографическая ссылка | Muller‐Dombois, D and Ellenberg, H. 1974. Aims and methods of vegetation ecology, New York: John Wiley & Sons. |
| Библиографическая ссылка | Novellie, P and Strydom, G. 1987. Monitoring the response of vegetation to use by large herbivores: an assessment of some techniques. South African Journal of Wildlife Research, 17: 109–117. |
| Библиографическая ссылка | Pielou, EC. 1984. The interpretation of ecological data, New York: John Wiley & Sons. |
| Библиографическая ссылка | Yeaton, RI, Frost, S and Frost, PGH. 1986. Direct gradient analysis of grasses in a savanna. South African Journal of Science, 82: 482–487. |
| Библиографическая ссылка | Swokowski, EW. 1983. Calculus with analytic geometry (), 3rd edn, Boston: Prindle, Weber & Schmidt. |
