The National Key Forestry Ecology Project has changed the zonal pattern of forest litter production in China
The National Key Forestry Ecology Project has changed the zonal pattern of forest litter production in China
复制标题
国家林业生态重点工程改变了我国森林凋落物生产的地带性格局
DOI：
10.1016/j.foreco.2017.05.019
复制
发表时间：
2017-09
影响因子：
3.7
通讯作者：
Ni XY
中科院分区：
文献类型：
--
作者：
You CM;Wu FZ;Yang WQ;Tan B;Yue K;Ni XY
落叶垃圾将有机物和养分从植被转移到土壤中，在全球碳 (C) 循环中发挥着重要作用。为了了解中国重点生态工程在全球碳循环中的作用，利用荟萃分析对全国范围内的森林凋落物产生的分区进行了调查。结果表明，1980年至2016年间，年平均凋落物量为4.947 ±0.087 Mg ha−1yr−1。原始林的年平均凋落物量与次生林相似；两者都明显高于人工林。凋落物总量和落叶量随着纬度和海拔的增加而显着下降，并与经度呈二次关系。然而，比较不同林分来源的凋落物产量与纬度、经度和海拔的回归关系发现，次生林（R2adj= 0.488、0.307、0.100、allp<0.01）和原始林（R2adj= 0.459、0.223、0.142、 allp< 0.01），其次是人工林（R2adj= 0.037, 0.017, 0.016，allp< 0.01）。天然林模型的系数和截距均显着大于人工林模型的系数和截距（除两个值 0.081 和一个值 0.392 外，所有 p< 0.01）。根据回归模型，发现天然林和所有森林之间凋落物产量与地理因素的关系存在显着差异。这些研究结果表明，国家林业生态重点工程改变了中国森林凋落物产生的地带性格局，这意味着年平均凋落物产生的估算和不同林分来源空间分布格局的定量分析对于了解全球碳循环和管理中国森林资源尤为重要。
Litterfall transfers organic matter and nutrients from vegetation to soil and serves a major role in the global carbon (C) cycle. To understand the role of China’s Key Ecology Project in the global C cycle, the zonality of national-scale forest litter production was investigated using a meta-analysis. The results showed that the mean annual litterfall was 4.947 ± 0.087 Mg ha−1yr−1between 1980 and 2016. The mean annual litterfall in primary forests was similar to that in secondary forests; both were significantly greater than that in planted forests. The total and leaf litter production significantly decreased with increasing latitude and altitude and showed a quadratic relationship with longitude. However, a comparison of the regression relationships of litter production of different forest stand origins with latitude, longitude and altitude revealed relatively larger adjusted R2values (R2adj) for secondary forests (R2adj= 0.488, 0.307, 0.100, allp< 0.01) and primary forests (R2adj= 0.459, 0.223, 0.142, allp< 0.01), followed by planted forests (R2adj= 0.037, 0.017, 0.016, allp< 0.01). The coefficients and intercepts of the models of natural forests were significantly larger than those of planted forests (allp< 0.01, with the exception of two values of 0.081 and one value of 0.392). Based on the regression models, significant differences in the relationship between litter production and geographical factors were found between natural forests and all forests. These findings reveal that The National Key Forestry Ecology Project has changed the zonal pattern of forest litter production in China and imply that estimates of mean annual litter production and quantitative analysis of spatial distribution patterns in different forest stand origins are particularly important for understanding the global C cycle and managing forest resources in China.
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影响因子：
3.4
作者：
M. Scherer‐Lorenzen;J. L. Bonilla;C. Potvin
通讯作者：
M. Scherer‐Lorenzen;J. L. Bonilla;C. Potvin
影响因子：
15.8
作者：
Moher D;Liberati A;Tetzlaff J;Altman DG;PRISMA Group
通讯作者：
PRISMA Group
DOI：
10.1136/bmj.b2535
发表时间：
2009-07-21
期刊：
BMJ (Clinical research ed.)
影响因子：
--
作者：
Moher D;Liberati A;Tetzlaff J;Altman DG;PRISMA Group
通讯作者：
PRISMA Group
影响因子：
2.8
作者：
Yusheng Yang;Jianfen Guo;Guangshui Chen;Jinsheng Xie;R. Gao;Zhen Li;Zhao Jin
通讯作者：
Yusheng Yang;Jianfen Guo;Guangshui Chen;Jinsheng Xie;R. Gao;Zhen Li;Zhao Jin
影响因子：
3.7
作者：
E. Paudel;G. Dossa;Jian-chu Xu;R. Harrison
通讯作者：
E. Paudel;G. Dossa;Jian-chu Xu;R. Harrison