摘要
Knowledge about cumulative effects of forest management alternatives on forest landscape is required to make forest management decision. In this paper,a spatially explicit landscape model,LANDIS,was applied to simulate forest landscape changes in 200 years under four management alternatives (no cutting,clearcutting,selective cutting I and II) in Youhao Forestry Bureau located in Small Khingan Mountains. APACK was used to calculate distribution area of the representative species and species age cohort for six species. The results showed:1) timber harvest decreased area percentage of representative conifer species,Pinus koraiensis,Picea koraiensis and Picea jezoensis,Larix gmelinii to some extent compared to no cutting. The most influencing cutting mode for the area percentage of Tilia amurensis and Quercus mongolica was selective cutting II,followed by selective cutting I and clearcutting. To the contrast,the change of area percentage of Betula phatyphylla was contrary to the management alternatives; 2) As to species age cohort composition,timber harvest significantly changed age structure,that is,it decreased over-matured age cohort of representative species,and increased seedling and middle-age cohort (B. phatyphylla was not included,because its area percentage of over-mature age cohort was the highest under clearcutting than other three scenarios).
Knowledge about cumulative effects of forest management alternatives on forest landscape is required to make forest management decision. In this paper, a spatially explicit landscape model, LANDIS, was applied to simulate forest landscape changes in 200 years under four management alternatives (no cutting, clearcutting, selective cutting Ⅰ and Ⅱ) in Youhao Forestry Bureau located in Small Khingan Mountains. APACK was used to calculate distribution area of the representative species and species age cohort for six species. The results showed: 1 ) timber harvest decreased area percentage of representative conifer species, Pinus koraiensis, Picea koraiensis and Picea jezoensis, Larix gmelinii to some extent compared to no cutting. The most influencing cutting mode for the area percentage of Tilia amurensis and Quercus mongolica was selective cutting Ⅱ, followed by selective cutting Ⅰ and clearcutting. To the contrast, the change of area percentage of Betula phatyphyUa was contrary to the management alternatives; 2) As to species age cohort composition, timber harvest significantly changed age structure, that is, it decreased over-matured age cohort of representative species, and increased seedling and middle-age cohort ( B. phatyphylla was not included, because its area percentage of over-mature age cohort was the highest under clearcutting than other three scenarios).
出处
《林业科学》
CAS
CSCD
北大核心
2009年第5期157-163,共7页
Scientia Silvae Sinicae
基金
国家自然科学基金重点项目(40331008)
中国科学院知识创新工程资助项目(KSCX2-SW-133)资助