Pinus pumila growth at different altitudes in the Svyatoi Nos Peninsula (Russia)
2010
Gebauer, R.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Lesnicke Botaniky, Dendrologie a Geobiocenologie | Volarik, D.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Lesnicke Botaniky, Dendrologie a Geobiocenologie | Funda, T.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Dendrologie a Slechteni Lesnich Drevin | Fundova, I.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Dendrologie a Slechteni Lesnich Drevin | Kohutka, A.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Dendrologie a Slechteni Lesnich Drevin | Klapetek, V.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Dendrologie a Slechteni Lesnich Drevin | Martinkova, M.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Lesnicke Botaniky, Dendrologie a Geobiocenologie | Anenkhonov, O.A.,Institute of General and Experimental Biology in Ulan-Ude (Russian Federation) | Razuvaev, A.,Zabaikalsky National Park, Ust-Barguzin (Russian Federation)
Detailed research is necessary to better understand ecological adaptations of Pinus pumila as a species. In the Svyatoi Nos Peninsula, three sites differing in altitude were selected. The growth form of P. pumila was determined. At the high and medium sites, the following characteristics were measured: linear increment on terminal branches, leaf mass per area and the content of nitrogen per unit leaf area. Anatomical studies were carried out on shoots and four needle-year classes. It was found that needles were longer and narrower at the medium site when compared to the high site. Leaf mass per area was higher and a substantial increase in older needles occurred at the high site. Nitrogen content per unit leaf area served as an indicator of assimilation capacity and was higher at the high site. We can conclude that P. pumila has xeromorphic needles, higher assimilation capacity, better protection ability against pathogens and slower growth rate of terminal branches at the high site. A significant increment of the growth rate of terminal branches at the high site in recent years was observed. Therefore, data obtained from sites at the upper forest limit are valuable in assessing the climatic changes and are useful for the forest management practice in mountain areas.
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