Since the end of the last century, two major changes in forest management policy and strategies have been affecting the sustainability of natural Korea pine (Pinus koraiensis) and broadleaf mixed forest (KBF) : implementation of Natural Forest Protection Project (NFPP) and no鄄cutting Korean pine which was taken as a important timber and logged all the time. However, the post鄄harvest regeneration has not changed correspondingly. Planting Korean pine is continually the only one way to promote natural regeneration, while broadleaf tree species is ignored in the management systems. In order to explore the effect of current management pattern on the sustainability o KBF, this study evaluated the availabilities of forest resources utilization in typical KBF region. The results showed that the implementation of NFPP has decreased harvesting quota, increased forest unit鄄area volume and then indirectly promoted KBF restoration. Since Korean pine has not been harvested at around of the end of the last century, four broadleaf tree species, including Tilia amurensis, Quercus mongolica, Fraxinus mandschurica and Ulmus japonica occupied 94. 7% of total amount of timber production, however, their growing increase in standing timber in commercial forest are lesser than that of felled lumber, suggesting that the timber resource are getting deficit and not sustainable. While the forest management model " planting coniferous and cutting http: / / www.ecologica.cn broadleaf冶 has gotten the situation worse. In the processing of keeping coniferous tree survival, a large number of broadleaf, the four timber tree species among them, are removed because of probably affecting conifer tree live. As a consequence, broadleaf seedlings and sapling are scarce in stands floor. In general, the two major changes has indirectly caused forest resource restoration and increased the sustainability of KBF in welfare forest area. At mean time, they has consistently increased the dominance of Korean pine in the KBF stands, reduced the capacity of standing timber in commercial forest, and then decreased the sustainable utilization for timber. Out results indicated that the current forest management will tend to rapid depletion of standing timber in KBF distribution area. Therefore, this study suggested that suitable forest management should adapted to forest planning, management targets, stand situations.
The Natural Forest Protection Program ( NFPP ) , which aims at protecting ecological resources and achieving sustainable forest management, has been implemented for 10 years in Northeast China. Under the program forest ecosystems in the region have been divided into three management areas-Key conservation, General conservation and Commercial forest. Each of these three types of forest land is subject to different management measures ( protecting or logging ) .Estimating carbon storage of forest vegetation in these areas is important both for understanding the capacity of forests in the Northeast region for carbon sequestration and as an aid to assessing the effectiveness of the NFPP in meeting its goals. To address this important need, this study selected five major forest types in the Northeast forest region-larch forest, birch forest, coniferous mixed forest, broadleaved mixed forest, coniferous and broadleaved mixed forest. Each forest type was divided into four age classes-young, mid鄄aged, premature and over mature forest. Tree biomass was calculated through
Influence of selection cutting on sustainable timber production of a broadleaved Korean pine ( Pinus koraiensis) forest on Changbai Mountain.
Treeline as one of the most important indicators of climate change has been extensively researched for the past years. Elucidation of past and present treeline formation can help us to understand how rising temperatures influence the treeline pattern and to predict treeline response to future climate change. On the other hand, global treeline positions have been considered to advance or retreat because of human disturbance and / or changes in local environmental factors combined with climate warming. Every natural treeline has a common convergence characteristic, namely, a limitation of tree height growth because of low temperature or other stress conditions, and this causes a gradual change to elfin or shrubby trees along an elevation gradient. Thus, elucidation of the functional differences between trees and alpine shrubs will facilitate an understanding of the alpine treeline. The spatial distribution pattern is an indicator of the selective adaption of a population to a specific environment, and it is considered to be a crucial character for describing the relative spatial location of the population. The extent to which plant individuals are aggregated can reflect the dispersal strategies of a species and determine how this species utilizes resources. The point process theory provides several statistics containing Riply忆 s K鄄
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.