Effects of stand age, richness and density on productivity in subtropical forests in China
Effects of stand age, richness and density on productivity in subtropical forests in China
复制标题
林龄、丰富度和密度对中国亚热带森林生产力的影响
DOI：
10.1111/1365-2745.13194
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发表时间：
2019-09-01
影响因子：
5.5
通讯作者：
Peng, Changhui
中科院分区：
文献类型：
--
作者：
Ouyang, Shuai;Xiang, Wenhua;Peng, Changhui
1. 森林生产力不仅受生物多样性的影响，还受环境因素和林分结构属性的影响。然而，这些因素在决定亚热带森林生产力方面的相对重要性仍然存在争议。基于中国亚热带地区600个永久性森林清查样地的大型数据集，研究了生物多样性与森林生产力之间的关系，并测试了林分结构属性（以每公顷树木为单位的林分密度、树龄和树高）和环境因素（气候和立地条件）对生产力的影响是否更大。此外，我们还量化了环境因子、林分结构和多样性在森林生产力决定中的相对重要性。多样性与林分结构和立地条件一起调节着森林生产力的变异。多样性与森林生产力之间的关系不随环境梯度而变化。林分密度和林龄是比多样性更重要的生产力调节因子。合成。在物种丰富的亚热带森林中，多样性对生产力有显著的正向影响，但林分密度和林龄的影响也很重要。我们的工作强调，虽然生物多样性保护通常很重要，但林分结构的调节对于保持亚热带森林的高生产力可能更为重要。
1. Forest productivity may be determined not only by biodiversity but also by environmental factors and stand structure attributes. However, the relative importance of these factors in determining productivity is still controversial for subtropical forests.2. Based on a large dataset from 600 permanent forest inventory plots across subtropical China, we examined the relationship between biodiversity and forest productivity and tested whether stand structural attributes (stand density in terms of trees per ha, age and tree size) and environmental factors (climate and site conditions) had larger effects on productivity. Furthermore, we quantified the relative importance of environmental factors, stand structure and diversity in determining forest productivity.3. Diversity, together with stand structure and site conditions, regulated the variability in forest productivity. The relationship between diversity and forest productivity did not vary along environmental gradients. Stand density and age were more important modulators of forest productivity than diversity.4. Synthesis. Diversity had significant and positive effects on productivity in species-rich subtropical forests, but the effects of stand density and age were also important. Our work highlights that while biodiversity conservation is often important, the regulation of stand structure can be even more important to maintain high productivity in subtropical forests.