Retrospective Assessment of the Parameters of Needle Retention in Scotch Pine

Retrospective Assessment of the Parameters of Needle Retention in Scotch Pine Russian Journal of Ecology, Vol. 33, No. 6, 2002, pp. 452–454. Translated from Ekologiya, No. 6, 2002, pp. 478–480. Original Russian Text Copyright © 2002 by Fedorkov. SHORT COMMUNICATIONS Retrospective Assessment of the Parameters of Needle Retention in Scotch Pine A. L. Fedorkov Institute of Biology, Komi Research Center, Ural Division, Russian Academy of Sciences, Kommunisticheskaya ul. 28, Syktyvkar, 167610 Russia Received September 13, 2001 Key words: Needle retention, Scotch pine, needle traces. The life span of pine needles is often regarded as an Enterprise, Komi Republic (62 17¢ N, 50 40¢ E) near adaptive character in relation to unfavorable environ- the Lyal’skii Forest-Ecological Station of the Institute mental factors (Pravdin, 1964). In addition to natural of Biology, Komi Research Center. These were healthy aging, needle loss is promoted by decreased illumina- trees with straight trunks and uniformly developed tion, unbalanced nutrition, pathogenic fungi, needle- undamaged crowns (Aalto and Jalkanen, 1998). After gnawing insects, atmospheric pollution, and weather felling, the trunk of each tree was sawed into the sec- conditions (winter desiccation, snow, and wind). tions corresponding to annual shoots, beginning from a Forest monitoring involves the visual estimation of height of 1.3 m. The sections were marked (tree Russian Journal of Ecology Springer Journals

Retrospective Assessment of the Parameters of Needle Retention in Scotch Pine

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Kluwer Academic Publishers-Plenum Publishers
Copyright © 2002 by MAIK “Nauka/Interperiodica”
Life Sciences; Ecology
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