Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.foreco.2017.12.043 |
Nocturnal transpiration in 18 broadleaf timber species under a tropical seasonal climate | |
Siddiq, Zafar2,3,4; Cao, Kun-Fang1 | |
2018-06-01 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT |
ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2018 |
卷号 | 418页码:47-54 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Pakistan |
英文摘要 | Global increase in night time as compared to day time temperatures results in an increased nocturnal VPD, which possibly increases nocturnal transpiration of plants. However, there are few studies on nocturnal transpiration of plantations in the tropics. Here, we investigated the ratio of nocturnal to daily transpiration and its seasonal differences in timber plantations of tropical angiosperm tree species in low land seasonal tropical botanical garden in southwest China. We measured sap flow in 18 tree, comprising of nine evergreen and nine deciduous species, during three months in the wet season and three months in the dry season between 2012 and 2013. We partitioned the nocturnal sap flux density (SFD) into nocturnal transpiration and trunk water recharge. We also measured wood density to investigate its relationship with nocturnal sap flux density. Our results showed that the mean nocturnal (whole night-time) VPD was linearly correlated with mean nocturnal SFD (R-2 > 0.41-0.73 across species) in both the wet and thy seasons. During the wet season, the ratio of nocturnal SFD to daily SFD was 0.12-0.19 and 0.15-0.2 among evergreen and deciduous species, respectively. During the dry season, this ratio increased to 0.18-0.28 for evergreen species. For evergreen species, the nocturnal trunk water recharge and nocturnal transpiration in the wet season were between 11.37-59.80% and 40.20-88.62% of nocturnal SFD, respectively. For deciduous species, these values were 18.10-66.26% and 81.90-33.73%, respectively. We found an inverse relationship between nocturnal SFD and wood density (R-2 = 0.24, P <= 0.05) across the 18 studied species. In conclusion, this study demonstrates a substantia amount of nocturnal transpiration in a number of tropical tree species, even in the wet season and increased nocturnal transpiration in evergreen species in dry season. However, there was not any significant difference of the nocturnal SFD between evergreen and deciduous species during the wet season. Nocturnal transpiration is constrained by wood density across species. High nocturnal air temperature will result in increased transpirational demand and hence water loss at night. Our findings revealed important implications for nocturnal transpiration on soil-plant equilibrium and hydrology of forest ecosystems in the seasonal tropics. |
英文关键词 | Nocturnal sap flux density Seasonal variation Vapor pressure deficit Water recharge Wood density |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000432498500007 |
WOS关键词 | NIGHTTIME WATER-USE ; SAP FLOW ; STOMATAL CONDUCTANCE ; HYDRAULIC ARCHITECTURE ; SAFETY MARGINS ; WOODY-PLANTS ; TREES ; TEMPERATE ; EVERGREEN ; RESPONSES |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
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/23695 |
专题 | 气候变化 |
作者单位 | 1.Guangxi Univ, Coll Forestry, Guangxi Key Lab Forest Ecol & Conservat,Plant Eco, State Key Lab Conservat & Utilizat Subtrop Agrobi, Nanning 530005, Guangxi, Peoples R China; 2.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Key Lab Trop Forest Ecol, Mengla 666303, Yunnan, Peoples R China; 3.Govt Coll Univ, Dept Bot, Lahore 54000, Pakistan; 4.Univ Chinese Acad Sci, Beijing 100039, Peoples R China |
推荐引用方式 GB/T 7714 | Siddiq, Zafar,Cao, Kun-Fang. Nocturnal transpiration in 18 broadleaf timber species under a tropical seasonal climate[J]. FOREST ECOLOGY AND MANAGEMENT,2018,418:47-54. |
APA | Siddiq, Zafar,&Cao, Kun-Fang.(2018).Nocturnal transpiration in 18 broadleaf timber species under a tropical seasonal climate.FOREST ECOLOGY AND MANAGEMENT,418,47-54. |
MLA | Siddiq, Zafar,et al."Nocturnal transpiration in 18 broadleaf timber species under a tropical seasonal climate".FOREST ECOLOGY AND MANAGEMENT 418(2018):47-54. |
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