Effects of Climate Change and Shifts in Forest Composition on Forest Net Primary Production

查看全文 作　　者：Jyh-Min [1]Chiang;Louts [2]R.Iverson;Anantha [3]Prasad;Kim [1]J.Brown

机构地区：[1]Department of Environmental and Plant Biology,Ohio University;[2]United States Department of Agriculture Forest Service,Northern Research Station;[3]Department of Life Science,Tunghai University

出　　处：《Journal of Integrative Plant Biology》索引2008年第50卷第11期,共14页

基　　金：Supported by the DISTRIB/SHIFT grant from the USDA Forest Service Northern Research Station. 摘　　要：Forests are dynamic in both structure and species composition,and these dynamics are strongly influenced by climate.However,the net effects of future tree species composition on net primary production (NPP) are not well understood.The objective of this work was to model the potential range shifts of tree species (DISTRIB Model) and predict their impacts on NPP (PnET-II Model) that will be associated with alterations in species composition.We selected four 200 × 200 km areas in Wisconsin,Maine,Arkansas,and the Ohio-West Virginia area,representing focal areas of potential species range shifts.PnET-II model simulations were carried out assuming that all forests achieved steady state,of which the species compositions were predicted by DISTRIB model with no migration limitation.The total NPP under the current climate ranged from 552 to 908 g C/m2 per year.The effects of potential species redistributions on NPP were moderate (-12% to +8%) compared with the influence of future climatic changes (-60% to +25%).The direction and magnitude of climate change effects on NPP were largely dependent on the degree of warming and water balance.Thus,the magnitude of future climate change can affect the feedback system between the atmosphere and biosphere. 关键词：全球气候变化森林净初级生产力碳吸收

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Effects of Climate Change and Shifts in Forest Composition on Forest Net Primary Production

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