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High tree diversity enhances light interception in tropical forests
Journal of Ecology ( IF 5.3 ) Pub Date : 2021-04-21 , DOI: 10.1111/1365-2745.13669 Marina Melo Duarte 1, 2 , Rafael de Andrade Moral 3 , Joannès Guillemot 4, 5, 6 , Caroline Isaac Ferreira Zuim 2, 6 , Catherine Potvin 7 , Wagner Hugo Bonat 8 , José Luiz Stape 9 , Pedro H.S. Brancalion 2, 6
中文翻译：
高树木多样性增强了热带森林中的光拦截
更新日期：2021-04-21
Journal of Ecology ( IF 5.3 ) Pub Date : 2021-04-21 , DOI: 10.1111/1365-2745.13669 Marina Melo Duarte 1, 2 , Rafael de Andrade Moral 3 , Joannès Guillemot 4, 5, 6 , Caroline Isaac Ferreira Zuim 2, 6 , Catherine Potvin 7 , Wagner Hugo Bonat 8 , José Luiz Stape 9 , Pedro H.S. Brancalion 2, 6
Affiliation
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- Understanding the processes that underlie the effects of tree diversity on primary production is of foremost importance to enhance climate change mitigation by tropical forests. Here, we investigated the effects of tree diversity on light interception over space and time in two tropical tree experiments, located in Panama—Sardinilla site (monocultures to 18-species mixtures), and in Brazil—Anhembi site (20- to 114-species mixtures).
- We assessed intercepted photosynthetically active radiation (iPAR) over horizontal grids and vertical transects (up to 5 m high in Sardinilla and up to 4 m high in Anhembi), in plots containing different richness levels and combinations of species.
- Light interception increased from monocultures to 5-species mixtures in Sardinilla and from 20- to 114-species mixtures in Anhembi (during the dry season). At the Sardinilla site, five-species mixtures showed iPAR comparable to the best performing monocultures, despite substantial differences observed among monocultures. Diversity-iPAR relationships changed seasonally and were more pronounced during the dry season. Tree richness promoted a less variable temporal and spatial (i.e. both horizontal and vertical) distribution of light interception.
- Synthesis. High tree diversity (i.e. over a hundred species in mixture) maximizes the amount of light intercepted by the canopy in restored tropical forests through more even capture in space and time. Diversity-light interception relationships should be critically considered for designing cost-efficient large-scale tropical forest restoration programs.
中文翻译：
高树木多样性增强了热带森林中的光拦截
- 了解造成树木多样性对初级生产影响的过程对于加强热带森林减缓气候变化至关重要。在这里，我们研究了树的多样性的影响，光拦截在空间和时间两个热带树实验，位于Panama- Sardinilla网站（单一种植到18种混合物），并在巴西-安汉比现场（20至114种混合物）。
- 我们评估截获光合有效辐射（IPAR）在水平网格和垂直断面（在长达5米的Sardinilla和至多4米高安汉比），在含有不同水平的丰富性和物种的组合曲线。
- Sardinilla 的光拦截从单一栽培增加到 5种混合物，Anhembi（旱季期间）从 20 到 114 种混合物。在Sardinilla站点，尽管在单一栽培之间观察到了很大差异，但五种物种的混合物显示出与表现最佳的单一栽培相当的 iPAR。多样性-iPAR 关系随季节变化，在旱季更为明显。树木丰富度促进了光拦截的时间和空间（即水平和垂直）分布的变化较小。
- 合成。高度的树木多样性（即混合中的 100 多种物种）通过在空间和时间上更均匀地捕获，最大限度地增加了恢复热带森林中树冠截获的光量。在设计具有成本效益的大规模热带森林恢复计划时，应认真考虑多样性-光拦截关系。
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