More efficient aboveground nitrogen use in more diverse Central European forest canopies
More efficient aboveground nitrogen use in more diverse Central European forest canopies
复制标题
DOI：
10.1016/j.foreco.2013.11.021
复制
发表时间：
2014-02
影响因子：
3.7
通讯作者：
M. Schwarz;Sebastian Bischoff;S. Blaser;S. Boch;Barbara Schmitt;Lisa Thieme;M. Fischer;B. Michalzik;E. Schulze;J. Siemens;W. Wilcke
中科院分区：
文献类型：
--
作者：
M. Schwarz;Sebastian Bischoff;S. Blaser;S. Boch;Barbara Schmitt;Lisa Thieme;M. Fischer;B. Michalzik;E. Schulze;J. Siemens;W. Wilcke
我们假设，生物多样性改善生态系统功能和服务，如养分循环，因为增加的互补性。我们研究了27个中欧森林不同的优势树种，林分密度，树木和灌木物种多样性（香农指数）在三个研究区域的氮冠层预算量化散装和细颗粒干沉降和溶解冠层下的氮通量。平均区域冠层氮保留范围从16%到51%，因为生态系统的N状态的差异。针叶林和落叶林冠层氮素收支的差异主要是由于针叶林和落叶林的氮素地球化学循环、树木功能性状和冠层表面积的差异。冠层氮预算相关的香农指数解释14%的方差冠层氮预算，这表明互补的地上N利用树木和不同的林下植被。植物多样性与冠层氮保持量的关系因立地条件和森林类型而异。我们的研究结果表明，不同植物群落根系营养吸收地下互补性的传统观点可以转移到森林冠层的叶片吸收上。
We hypothesized that biodiversity improves ecosystem functioning and services such as nutrient cycling because of increased complementarity. We examined N canopy budgets of 27 Central European forests of varying dominant tree species, stand density, and tree and shrub species diversity (Shannon index) in three study regions by quantifying bulk and fine particulate dry deposition and dissolved below canopy N fluxes. Average regional canopy N retention ranged from 16% to 51%, because of differences in the N status of the ecosystems. Canopy N budgets of coniferous forests differed from deciduous forest which we attribute to differences in biogeochemical N cycling, tree functional traits and canopy surface area. The canopy budgets of N were related to the Shannon index which explained 14% of the variance of the canopy budgets of N, suggesting complementary aboveground N use of trees and diverse understorey vegetation. The relationship between plant diversity and canopy N retention varied among regional site conditions and forest types. Our results suggest that the traditional view of belowground complementarity of nutrient uptake by roots in diverse plant communities can be transferred to foliar uptake in forest canopies.