Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: Short Communication Differences in the structure, species composition and diversity of primary and harvested forests on Changbai Mountain, Northeast China. | JOURNAL OF FOREST SCIENCE 56 2010 6 285-293 Short Communication Differences in the structure species composition and diversity of primary and harvested forests on Changbai Mountain Northeast China Dongkai Su1 2 Dapao Yu1 Li Zhou1 Xiaokui Xie1 Zhenggang Liu1 Limin Dai1 1Chinese Academy of Sciences Institute of Applied Ecology Shenyang China Limited Liability Company Jilin Forest Industry Group Changchun China ABSTRACT Broadleaved-Korean pine Pinuskoraiensis mixed forest is a typical vegetation type in the eastern Eurasian continent. We compared the structure composition and diversity of a primary forest and a logged forest for effective management and regeneration of a mixed forest ecosystem on Changbai Mountain Northeast China. The logged forest was subjected to selective harvesting twenty years ago. The mean diameter and basal area for overall trees 2 cm dbh were higher in the primary forest than in the logged forest whereas overall tree density was significantly lower in the former 994 34 trees-ha-1 than in the logged forest 1921 79 trees-ha-1 . The values of species richness and both Simpson s and Shannon s diversity indices for seedlings 2 cm dbh 50 cm tall saplings cm dbh and overall trees were greater in the primary forest. These results indicate that the selective logging had a lasting impact on the structural characteristics of the forest. There were major differences in species composition between the two forest sites with the logged forest having more pioneer and mid-tolerant species than the primary forest. Diversity was more extensive in the logged forest due to the invasion of pioneer species. Twenty years is clearly an insufficient time for the logged forest to regain primary forest composition and structure. These two characteristics of the primary forest may serve as a reference for developing management plans for forest regeneration. Keywords broadleaved-Korean pine mixed forest forest structure species composition species diversity The .
