Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14293 |
Causes of reduced leaf-level photosynthesis during strong El Nino drought in a Central Amazon forest | |
Hardt Ferreira dos Santos, Victor Alexandre1; Ferreira, Marciel Jose2; Figueiredo Cardoso Rodrigues, Joao Victor3; Garcia, Maquelle Neves1; Barbosa Ceron, Joao Vitor1; Nelson, Bruce Walker1; Saleska, Scott Reid4 | |
2018-09-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:9页码:4266-4279 |
文章类型 | Article |
语种 | 英语 |
国家 | Brazil; USA |
英文摘要 | Sustained drought and concomitant high temperature may reduce photosynthesis and cause tree mortality. Possible causes of reduced photosynthesis include stomatal closure and biochemical inhibition, but their relative roles are unknown in Amazon trees during strong drought events. We assessed the effects of the recent (2015) strong El Nino drought on leaf-level photosynthesis of Central Amazon trees via these two mechanisms. Through four seasons of 2015, we measured leaf gas exchange, chlorophyll a fluorescence parameters, chlorophyll concentration, and nutrient content in leaves of 57 upper canopy and understory trees of a lowland terra firme forest on well-drained infertile oxisol. Photosynthesis decreased 28% in the upper canopy and 17% in understory trees during the extreme dry season of 2015, relative to other 2015 seasons and was also lower than the climatically normal dry season of the following non-El Nino year. Photosynthesis reduction under extreme drought and high temperature in the 2015 dry season was related only to stomatal closure in both upper canopy and understory trees, and not to chlorophyll a fluorescence parameters, chlorophyll, or leaf nutrient concentration. The distinction is important because stomatal closure is a transient regulatory response that can reverse when water becomes available, whereas the other responses reflect more permanent changes or damage to the photosynthetic apparatus. Photosynthesis decrease due to stomatal closure during the 2015 extreme dry season was followed 2months later by an increase in photosynthesis as rains returned, indicating a margin of resilience to one-off extreme climatic events in Amazonian forests. |
英文关键词 | chlorophyll fluorescence climate change drought stress stomatal conductance tropical forest warming |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000441746900031 |
WOS关键词 | TROPICAL RAIN-FOREST ; A FLUORESCENCE INDUCTION ; GAS-EXCHANGE ; PHOTOSYSTEM-II ; WATER-STRESS ; NONSTOMATAL LIMITATIONS ; MEDITERRANEAN SUMMER ; STOMATAL SENSITIVITY ; CARBON ASSIMILATION ; SEASONAL-VARIATIONS |
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/17594 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Brazils Natl Inst Amazon Res, Environm Dynam Dept, Manaus, Amazonas, Brazil; 2.Univ Fed Amazonas, Dept Forest Sci, Manaus, Amazonas, Brazil; 3.Univ Fed Amazonas, Ctr Distance Educ, Manaus, Amazonas, Brazil; 4.Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ USA |
推荐引用方式 GB/T 7714 | Hardt Ferreira dos Santos, Victor Alexandre,Ferreira, Marciel Jose,Figueiredo Cardoso Rodrigues, Joao Victor,et al. Causes of reduced leaf-level photosynthesis during strong El Nino drought in a Central Amazon forest[J]. GLOBAL CHANGE BIOLOGY,2018,24(9):4266-4279. |
APA | Hardt Ferreira dos Santos, Victor Alexandre.,Ferreira, Marciel Jose.,Figueiredo Cardoso Rodrigues, Joao Victor.,Garcia, Maquelle Neves.,Barbosa Ceron, Joao Vitor.,...&Saleska, Scott Reid.(2018).Causes of reduced leaf-level photosynthesis during strong El Nino drought in a Central Amazon forest.GLOBAL CHANGE BIOLOGY,24(9),4266-4279. |
MLA | Hardt Ferreira dos Santos, Victor Alexandre,et al."Causes of reduced leaf-level photosynthesis during strong El Nino drought in a Central Amazon forest".GLOBAL CHANGE BIOLOGY 24.9(2018):4266-4279. |
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