Nauka Przyroda Technologie

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Marek Szczerba, Piotr Robakowski
Defoliation of monumental trees in the Nature Reserve “Krajkowo”
Summary.

In September 2009 an inventory and evaluation of health condition of monumental trees in the Nature Reserve „Krajkowo” were conducted. 80 of the 109 inventoried trees grew in the riparian forest site. Health condition of the old oaks was more deteriorated as compared with the results obtained in 2006. In 2009 the percentage of the monumental trees classified into degree three increased by 5% (> 60% of defoliation) and by 8% in degree two (26-60% of defoliation). The share of trees in class zero (0-10% of defoliation) decreased by 17% when compared with the data from 2006. The deterioration of condition might be caused by a reduction of flooding range and duration. Our observations do not allow to exclude that a progressive deterioration of the monumental trees condition has been a long-term trend in the “Krajkowo” reserve.

Key words: defoliation, monumental tree, Nature Reserve “Krajkowo”, oak decline
PDFFull text available in Polish in Adobe Acrobat format:
http://www.npt.up-poznan.net/tom7/zeszyt1/art_12.pdf

For citation:

MLA Szczerba, Marek, and Piotr Robakowski. "Defoliacja drzew pomnikowych w Rezerwacie Przyrody „Krajkowo”." Nauka Przyr. Technol. 7.1 (2013): #12.
APA Marek Szczerba1, Piotr Robakowski2 (2013). Defoliacja drzew pomnikowych w Rezerwacie Przyrody „Krajkowo”. Nauka Przyr. Technol. 7 (1), #12
ISO 690 SZCZERBA, Marek, ROBAKOWSKI, Piotr. Defoliacja drzew pomnikowych w Rezerwacie Przyrody „Krajkowo”. Nauka Przyr. Technol., 2013, 7.1: #12.
Corresponding address:
Marek Szczerba
Katedra Siedliskoznawstwa i Ekologii Lasu
Uniwersytet Przyrodniczy w Poznaniu
ul. Wojska Polskiego 71 E
60-625 Poznań
Poland
e-mail: pierrot@up.poznan.pl
Accepted for print: 9.01.2013