Abstract
Context
Recruitment is an important process in forest stand dynamics, especially in uneven-aged stands. Continuous recruitment is a prerequisite for diverse, uneven-aged silvicultural systems, but patterns may vary significantly.
Aims
The main goals of the study were to examine the recruitment of the main tree species in selection and irregular shelterwood stands in silver fir–European beech–Norway spruce forests and to determine the main predictors of the recruitment occurrence.
Methods
Data from 5,486 permanent inventory plots were used to study recruitment of saplings into the tree layer (diameter at breast height ≥10 cm).
Results
Recruitment rate differed significantly between selection (7.6 trees ha−1 year−1) and irregular shelterwood (26.1 trees ha−1 year−1) stands. Shade-tolerant fir and beech recruited with higher probability in selection stands, while light-dependent sycamore recruited with higher probability in irregular stands. In addition, forest types, soil pH, stand basal area, mean diameter, and the basal area of the same tree species with respect to recruitment were found to be important predictors of recruitment occurrence.
Conclusions
The application of different uneven-aged silvicultural systems and their forms makes it possible to considerably influence the future tree species composition of uneven-aged forests.
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Acknowledgments
The authors would like to thank Slovenian Forest Service, especially Dragan Matijasic and Ales Poljanec, for providing the access to forest inventory data, which made our study feasible. The comments of the three anonymous reviewers significantly improved the earlier version of the manuscript.
Funding
The study was supported in part by a grant from Pahernikova ustanova (contract number 11/2011).
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The first author’s contribution to the paper was in preparing the data, runing the data analysis, processing results, and writing the paper.
The last author’s contribution was in producing the research idea, coordinating and supervising the work, and editing the final version of the paper.
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Klopcic, M., Boncina, A. Recruitment of tree species in mixed selection and irregular shelterwood forest stands. Annals of Forest Science 69, 915–925 (2012). https://doi.org/10.1007/s13595-012-0224-1
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DOI: https://doi.org/10.1007/s13595-012-0224-1