Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13911 |
Variation in bulk-leaf C-13 discrimination, leaf traits and water-use efficiency-trait relationships along a continental-scale climate gradient in Australia | |
Rumman, Rizwana1; Atkin, Owen K.2; Bloomfield, Keith J.3; Eamus, Derek1 | |
2018-03-01 | |
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:3页码:1186-1200 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
英文摘要 | Large spatial and temporal gradients in rainfall and temperature occur across Australia. This heterogeneity drives ecological differentiation in vegetation structure and ecophysiology. We examined multiple leaf-scale traits, including foliar Delta C-13 isotope discrimination (Delta C-13), rates of photosynthesis and foliar N concentration and their relationships with multiple climate variables. Fifty-five species across 27 families were examined across eight sites spanning contrasting biomes. Key questions addressed include: (i) Does Delta C-13 and intrinsic water-use efficiency (WUEi) vary with climate at a continental scale? (ii) What are the seasonal and spatial patterns in Delta C-13/WUEi across biomes and species? (iii) To what extent does Delta C-13 reflect variation in leaf structural, functional and nutrient traits across climate gradients? and (iv) Does the relative importance of assimilation and stomatal conductance in driving variation in Delta C-13 differ across seasons? We found that MAP, temperature seasonality, isothermality and annual temperature range exerted independent effects on foliar Delta C-13/WUEi. Temperature-related variables exerted larger effects than rainfall-related variables. The relative importance of photosynthesis and stomatal conductance (g(s)) in determining Delta C-13 differed across seasons: Delta C-13 was more strongly regulated by g(s) during the dry-season and by photosynthetic capacity during the wet-season. Delta C-13 was most strongly correlated, inversely, with leaf mass area ratio among all leaf attributes considered. Leaf N-mass was significantly and positively correlated with MAP during dry- and wet-seasons and with moisture index (MI) during the wet-season but was not correlated with Delta C-13. Leaf P-mass showed significant positive relationship with MAP and Delta C-13 only during the dry-season. For all leaf nutrient-related traits, the relationships obtained for C-13 with MAP or MI indicated that Delta C-13 at the species level reliably reflects the water status at the site level. Temperature and water availability, not foliar nutrient content, are the principal factors influencing Delta C-13 across Australia. |
英文关键词 | C-13 climate and WUEi isotope discrimination leaf traits |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425396700027 |
WOS关键词 | CARBON-ISOTOPE DISCRIMINATION ; RAINFALL GRADIENT ; WOODY-PLANTS ; STOMATAL CONDUCTANCE ; AVAILABILITY ; LEAVES ; MODEL ; DEPTH ; PHOTOSYNTHESIS ; ECOPHYSIOLOGY |
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/17046 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Technol Sydney, Terr Ecohydrol Res Grp, Sch Life Sci, Sydney, NSW, Australia; 2.Australian Natl Univ, ARC Ctr Excellence Plant Energy Biol, Res Sch Biol, Canberra, ACT, Australia; 3.Australian Natl Univ, Res Sch Biol, Div Plant Sci, Canberra, ACT, Australia |
推荐引用方式 GB/T 7714 | Rumman, Rizwana,Atkin, Owen K.,Bloomfield, Keith J.,et al. Variation in bulk-leaf C-13 discrimination, leaf traits and water-use efficiency-trait relationships along a continental-scale climate gradient in Australia[J]. GLOBAL CHANGE BIOLOGY,2018,24(3):1186-1200. |
APA | Rumman, Rizwana,Atkin, Owen K.,Bloomfield, Keith J.,&Eamus, Derek.(2018).Variation in bulk-leaf C-13 discrimination, leaf traits and water-use efficiency-trait relationships along a continental-scale climate gradient in Australia.GLOBAL CHANGE BIOLOGY,24(3),1186-1200. |
MLA | Rumman, Rizwana,et al."Variation in bulk-leaf C-13 discrimination, leaf traits and water-use efficiency-trait relationships along a continental-scale climate gradient in Australia".GLOBAL CHANGE BIOLOGY 24.3(2018):1186-1200. |
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