Productivity of temperate broad-leaved forest stands differing in tree species diversity
Productivity of temperate broad-leaved forest stands differing in tree species diversity
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DOI：
10.1051/forest/2010005
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发表时间：
2010-07-01
影响因子：
3
通讯作者：
Thomas, Frank M.
中科院分区：
文献类型：
--
作者：
Jacob, Mascha;Leuschner, Christoph;Thomas, Frank M.
了解树种多样性对生物量和森林生产的影响对于碳封存战略至关重要，特别是从当前气候变化的角度来看。然而，原生林的多样性与生产力的关系尚不清楚。我们量化了9个树种多样性不断增加的林分的生物量和地上产量，从单一的山毛榉到由多达5种落叶树种组成的林分（Fagus sylvatica, Fraxinus excelsior, Tilia spp., Carpinus betulus, Acer spp.），以检验(a)混合林分是否比单一林分更多产，(b)树种在茎材，叶子和果实的生产力上有什么不同。(c)由于种内竞争和资源利用的互补性降低，山毛榉生产力是否随着树木多样性的增加而增加。地上总生物量和木材产量随着树种多样性的增加而减少。柴木属和黄曲霉属的基面积相关木材生产力高于共生树种，而椴属的叶生产力最高。在混交林中，单基面积产量没有增加。我们没有发现与生物质生产相关的补充资源利用的证据。我们得出结论，温带原生林的地上生产力更多地取决于树种特有的性状，而不是树木多样性本身。
Understanding the effects of tree species diversity on biomass and production of forests is fundamental for carbon sequestration strategies, particularly in the perspective of the current climate change. However, the diversity-productivity relationship in old-growth forests is not well understood.We quantified biomass and above-ground production in nine forest stands with increasing tree species diversity from monocultures of beech to stands consisting of up to five deciduous tree species (Fagus sylvatica, Fraxinus excelsior, Tilia spp., Carpinus betulus, Acer spp.) to examine (a) if mixed stands are more productive than monospecific stands, (b) how tree species differ in the productivity of stem wood, leaves and fruits, and (c) if beech productivity increases with tree diversity due to lower intraspecific competition and complementary resource use.Total above-ground biomass and wood production decreased with increasing tree species diversity. In Fagus and Fraxinus, the basal area-related wood productivity exceeded those of the co-occurring tree species, while Tilia had the highest leaf productivity. Fagus trees showed no elevated production per basal area in the mixed stands.We found no evidence of complementary resource use associated with biomass production. We conclude that above-ground productivity of old-growth temperate deciduous forests depend more on tree species-specific traits than on tree diversity itself.