Natural regeneration of Pinus brutia Ten. in a recreational public forest in Zawita-Kurdistan region, Iraq
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Zawita natural forest has recently has been subject to mass recreational activities during spring that have denuded large areas of the forest. It was thus essential to assess regeneration before designing optimizing strategies. To this end, we studied the overstory canopy and microhabitat conditions for recruitment of Pinus brutia Ten in 10 plots (20 × 25 m) on the southern aspects where the Zawita natural forest is still present. In total, 1540 regenerating P. brutia were recorded, 854 seedlings, 597 saplings, and 89 trees. Seedlings and saplings were more frequent beyond the canopy than under the canopy of the parent trees. Regeneration requirements differed between seedlings and saplings. The probability of the occurrence of seedlings was negatively correlated with increasing litter depth and increasing soil compaction. The density of saplings only showed a positive significant correlation with increasing slope. The nearest neighbor index showed a trend toward a positive spatial association between understory shrubs with their neighboring seedlings at a mean distance of 1.6 m. Overall, the study highlighted the requirements for seedling regeneration as a relatively open canopy cover, a light understory litter layer, and non-compacted soils. These results are a step towards designing effective management and restoration programs.
KeywordsForest structure Litter depth Regeneration niche Spatial pattern Soil compaction
We thank the Directorate of the Forestry and Rangelands of Duhok for permission to work in Zawita forest and for their assistance in the field.
- Ali NS, Ali OO, Esmail AO (2016) Comparison between some soil chemical properties and some nutrients in trees at zawita and hijran forest. Agric Vet Sci 19(1):701–712Google Scholar
- Caccia FD, Ballaré CL (1998) Effects of tree cover, understory vegetation, and litter on regeneration of Douglas-fir (Pseudotsug amanziessii) in south-western Argentina. Can J Soil Sci 28:683–692Google Scholar
- Fady B, Fineschi S, Vendramin GG (2004) EUFORGEN Technical Guidelines for genetic conservation and use for Italian stone pine (Pinus pinea). International Plant Genetic Resources Institute, RomeGoogle Scholar
- Marchi A, Paletto A (2010) Relationship between forest canopy and natural regeneration in the subalpine spruce-larch forest (north-east Italy). Folia Forestalia Polonica. Series A. Forestry 52(1):3–12Google Scholar
- Özdemir Ô (1977) Studies on the possibilities of natural regeneration of Pinus brutia Ten. in Antalya region (in Turkish). Review of the Faculty of Forestry, University of Istanbul Á/2:(Abstract)Google Scholar
- Sands R, Bowen GD (1978) Compaction of sandy soils in radiata pine forests. II. Effects of compaction on root configuration and growth of radiata pine seedlings. Aust For Res 8:163–170Google Scholar
- Shahbaz S (2007) Pinales: Spirez Press and Publication, colored. Duhok, Kurdistan Region of Iraq, 188 ppGoogle Scholar
- Thanos CA, Doussi M (2000) Post-fire regeneration of Pinus brutia forests. In: Ne’eman G, Trabaud L (eds) Ecology, biogeography and management of Pinus halepensis and P. brutia forest ecosystems in the Meditenanean basin. Backhuys Publisher, Leiden, pp 291–301Google Scholar
- Thanos CA, Skordilis A (1987) The effect of light, temperature and osmotic stress on the germination of Pinus halepensis and Pinus brutia seeds. Seed Sci Technol 15:163–174Google Scholar
- Wangchuk K (2007) Natural regeneration ecology of mixed conifer forests in Western Bhutan. M.Sc.thesis, University of Applied Life Sciences, Vienna, Austria, 79 ppGoogle Scholar