Abstract
Population dynamics, density, and aggregation size of tuberoid orchids have been identified based on mapping, electronic maps constructed with “point processes,” and Ripley function and pair-correlation function. Discrete and discrete-continuous types of spatial structure dominate in populations in optimal ecological conditions. The bounded aggregations of levels I (radius 0.45–0.75 m) and II (radius 1.2–2.5 m) are formed at 3 to 7.5 m2. The spatial pattern depends on generative specimens which are related with the “group effect.” The microloci have full ontogenetic structure and may be regarded as elemental populations. They form larger aggregations of levels III and IV with random spatial distribution and continuous bounds. Aggregations of higher level are not formed under worse ecological conditions. Random spatial distribution and incomplete ontogenetic spectrum of microloci are indicators of critical population status.
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Original Russian Text © M.B. Fardeeva, 2016, published in Sibirskii Ekologicheskii Zhurnal, 2016, No. 5, pp. 761–773.
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Fardeeva, M.B. Some patterns of spatial-ontogenetic structure in populations of tuber orchids. Contemp. Probl. Ecol. 9, 626–635 (2016). https://doi.org/10.1134/S199542551605005X
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DOI: https://doi.org/10.1134/S199542551605005X