CanPodocarpus totaraandP. Hallii bedistinguished by bark thickness?: A study on the southern coast of Southland/Otago, New Zealand
| Autor: | J. B. Wilson, C. J. West, Tetsuya Matsui |
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| Rok vydání: | 2004 |
| Předmět: | |
| Zdroj: | New Zealand Journal of Botany. 42:313-320 |
| ISSN: | 1175-8643 0028-825X |
| DOI: | 10.1080/0028825x.2004.9512906 |
| Popis: | Bark thickness has been said to be the key character in distinguishing Podocarpus totara from P. hallii. However, even this character has proved difficult to use, especially in the southern South Island coastal dune forests dominated by species of Podocarpus. Five stands of such forests were sampled in which bark thickness and tree diameter at breast height (dbh) of 527 trees were measured. Linear regression and analysis of variance indicated that bark‐thickness:dbh ratios differed between sites. Two hypothetical regression lines were constructed to represent what seemed to be, from the data, pure P. totara (a steep slope) and P. hallii (a shallow slope). At all sites, the actual thickness:dbh slope over all trees was intermediate between the hypothetical P. totara and P. hallii slopes. However, two sites seemed to be almost pure P. totara, perhaps with hybrids from a nearby stand of P. hallii in one case, and the other three sites comprised various mixtures of the two species, in many cases incl... |
| Databáze: | OpenAIRE |
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