Thursday, 17 November 2016

Effects of acorn attack by curculio weevils on the germination and early growth of Pasania edulis (Makino) seedlings

Published Date
Volume 21, Issue 4pp 185–192

Original Article
DOI: 10.1007/s10310-016-0531-8

Cite this article as: 
Sone, K., Oishi, K., Shibato, T. et al. J For Res (2016) 21: 185. doi:10.1007/s10310-016-0531-8

Author
  • Koichi Sone
  • Keita Oishi
  • Tatsuya Shibato
  • Kunihiko Hata
Abstract

We conducted field studies to evaluate the impact that curculio weevil attacks on Pasania edulis (Fagacea) acorns have on the regeneration of this tree. The germination ratio of weevil-attacked acorns was significantly lower than that of sound acorns. The number and position of the attacks on acorns affected the germination ratio. The seedlings from weevil-attacked acorns were shorter and had a smaller leaf area than those from sound acorns. The negative effects on seedling height lasted for at least three years after germination. We also studied the handling of the two types of acorns by granivorous Apodemus mice in a broad-leaved forest dominated by Pedulis. The mice picked up, transported, hoarded, and recovered sound and weevil-attacked acorns similarly. In the study site, the seedlings from weevil-attacked acorns were estimated to account for 1.5–20.4 % of the total seedlings for cohorts of mast years and 0–3.7 % for those of poor or medium acorn production. From these results, we conclude that acorns with the lower part of their cotyledons slightly damaged by weevil larvae might still be able to contribute to the regeneration of Pedulis in the field but that their contribution would be negligible or small even in mast years in this study site.

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For further details log on website :
http://link.springer.com/article/10.1007/s10310-016-0530-9

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