Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13725 |
The phenology of leaf quality and its within-canopy variation is essential for accurate modeling of photosynthesis in tropical evergreen forests | |
Wu, Jin1; Serbin, Shawn P.1; Xu, Xiangtao2; Albert, Loren P.3; Chen, Min4,5; Meng, Ran1; Saleska, Scott R.3; Rogers, Alistair1 | |
2017-11-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
![]() |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Leaf quantity (i.e., canopy leaf area index, LAI), quality (i.e., per-area photosynthetic capacity), and longevity all influence the photosynthetic seasonality of tropical evergreen forests. However, these components of tropical leaf phenology are poorly represented in most terrestrial biosphere models (TBMs). Here, we explored alternative options for the representation of leaf phenology effects in TBMs that employ the Farquahar, von Caemmerer & Berry (FvCB) representation of CO2 assimilation. We developed a two-fraction leaf (sun and shade), two-layer canopy (upper and lower) photosynthesis model to evaluate different modeling approaches and assessed three components of phenological variations (i.e., leaf quantity, quality, and within-canopy variation in leaf longevity). Our model was driven by the prescribed seasonality of leaf quantity and quality derived from ground-based measurements within an Amazonian evergreen forest. Modeled photosynthetic seasonality was not sensitive to leaf quantity, but was highly sensitive to leaf quality and its vertical distribution within the canopy, with markedly more sensitivity to upper canopy leaf quality. This is because light absorption in tropical canopies is near maximal for the entire year, implying that seasonal changes in LAI have little impact on total canopy light absorption; and because leaf quality has a greater effect on photosynthesis of sunlit leaves than light limited, shade leaves and sunlit foliage are more abundant in the upper canopy. Our two-fraction leaf, two-layer canopy model, which accounted for all three phenological components, was able to simulate photosynthetic seasonality, explaining similar to 90% of the average seasonal variation in eddy covariance-derived CO2 assimilation. This work identifies a parsimonious approach for representing tropical evergreen forest photosynthetic seasonality in TBMs that utilize the FvCB model of CO2 assimilation and highlights the importance of incorporating more realistic phenological mechanisms in models that seek to improve the projection of future carbon dynamics in tropical evergreen forests. |
英文关键词 | big leaf gross primary productivity leaf age leaf area index light use efficiency multilayer photosynthetic capacity sun/shade |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000412322700031 |
WOS关键词 | ENVIRONMENT SIMULATOR JULES ; PLANT FUNCTIONAL TYPES ; RAIN-FOREST ; AMAZON FORESTS ; VEGETATION DYNAMICS ; CARBON-DIOXIDE ; DRY-SEASON ; STOMATAL CONDUCTANCE ; LIGHT ENVIRONMENT ; CLIMATE-CHANGE |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/16944 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Brookhaven Natl Lab, Environm & Climate Sci Dept, New York, NY 11973 USA; 2.Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA; 3.Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721 USA; 4.Carnegie Inst Sci, Dept Global Ecol, Stanford, CA USA; 5.Pacific Northwest Natl Lab, Joint Global Change Res Inst, College Pk, MD USA |
推荐引用方式 GB/T 7714 | Wu, Jin,Serbin, Shawn P.,Xu, Xiangtao,et al. The phenology of leaf quality and its within-canopy variation is essential for accurate modeling of photosynthesis in tropical evergreen forests[J]. GLOBAL CHANGE BIOLOGY,2017,23(11). |
APA | Wu, Jin.,Serbin, Shawn P..,Xu, Xiangtao.,Albert, Loren P..,Chen, Min.,...&Rogers, Alistair.(2017).The phenology of leaf quality and its within-canopy variation is essential for accurate modeling of photosynthesis in tropical evergreen forests.GLOBAL CHANGE BIOLOGY,23(11). |
MLA | Wu, Jin,et al."The phenology of leaf quality and its within-canopy variation is essential for accurate modeling of photosynthesis in tropical evergreen forests".GLOBAL CHANGE BIOLOGY 23.11(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论