收稿日期：２０１５• ０８• １０； 网络出版日期：２０１６• ０６• １３ * 通讯作者 Ｃｏｒｒｅｓｐｏｎｄｉｎｇ ａｕｔｈｏｒ．Ｅ•ｍａｉｌ： ｌｍｄａｉ＠ ｉａｅ．ａｃ．ｃｎ ＤＯＩ： １０．５８４６ ／ ｓｔｘｂ２０１５０８１０１６８０ 贾翔，马芳芳，周旺明，周莉，于大炮， 秦静， 代力民．气候变化对阔叶红松林潜在地理分布区的影响．生态学报，２０１７，３７(２) ：４６４• ４７３． Ｊｉａ Ｘ， Ｍａ Ｆ Ｆ， Ｚｈｏｕ Ｗ Ｍ， Ｚｈｏｕ Ｌ， Ｙｕ Ｄ Ｐ， Ｑｉｎ Ｊ， Ｄａｉ Ｌ Ｍ．Ｉｍｐａｃｔｓ ｏｆ ｃｌｉｍａｔｅ ｃｈａｎｇｅ ｏｎ ｔｈｅ ｐｏｔｅｎｔｉａｌ ｇｅｏｇｒａｐｈｉｃａｌ ｄｉｓｔｒｉｂｕｔｉｏｎ ｏｆ ｂｒｏａｄｌｅａｖｅｄ Ｋｏｒｅａｎ ｐｉｎｅ (Ｐｉｎｕｓ ｋｏｒａｉｅｎｓｉｓ) ｆｏｒｅｓｔｓ．Ａｃｔａ Ｅｃｏｌｏｇｉｃａ Ｓｉｎｉｃａ，２０１７，３７(２) ：４６４• ４７３．

Forest vegetation carbon dynamics are widely considered as basic indicators of the capacity of a forest ecosystem for carbon sequestration and carbon exchange with the atmosphere and the ability of the forest ecosystem to function as a carbon sink or source. Forest management practices such as harvesting, afforestation, and reforestation are the most important factors that influence forest carbon dynamics. Therefore, elucidation of the effects of human silvicultural activities on forest ecosystem dynamics will provide a valuable insight into ways of expanding the size of the carbon pool and improving

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.

In the last 150 years, human activities such as fossil fuel usage and centralized agricultural schemes have resulted in the emission of large amounts of reactive nitrogen. Most of this reactive nitrogen falls to the ground via wet deposition as precipitation or dust fall. Nitrogen deposition plays a key role in the nitrogen biogeochemical cycles. Hence, quantification of nitrogen deposition in different areas is important for eco鄄security assessment. The Changbai Mountain region is a typical temperature forest in China; however, data regarding nitrogen deposition in this region are scarce. Investigation of nitrogen deposition in the Changbai Mountain region can provide a scientific basis for understanding nitrogen cycling in similar natural ecosystems. We conducted our present study at the Changbai Mountain Research Station of Forest Ecosystems. During 2009-2010, we collected rain and snow samples by using a rain gauge. We analyzed the concentrations

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