Canopy position affects the relationships between leaf respiration and associated traits in a tropical rainforest in Far North Queensland
文献类型：期刊论文
| 作者 | Weerasinghe, Lasantha K. ; Creek, Danielle ; Crous, Kristine Y. ; Xiang, Shuang ; Liddell, Michael J. ; Turnbull, Matthew H. ; Atkin, Owen K. |
| 刊名 | TREE PHYSIOLOGY
 |
| 出版日期 | 2014 |
| 卷号 | 34期号:6页码:564-584 |
| 关键词 | functional traits light photosynthesis Q(10) temperature |
| 通讯作者 | Atkin, OK (reprint author), Australian Natl Univ, Div Plant Sci, Res Sch Biol, Bldg 46, Canberra, ACT 0200, Australia. |
| 产权排序 | 4 |
| 合作状况 | 其它 |
| 英文摘要 | We explored the impact of canopy position on leaf respiration (R) and associated traits in tree and shrub species growing in a lowland tropical rainforest in Far North Queensland, Australia. The range of traits quantified included: leaf R in darkness (R-D) and in the light (R-L; estimated using the Kok method); the temperature (T)-sensitivity of R-D; light-saturated photosynthesis (A(sat)); leaf dry mass per unit area (LMA); and concentrations of leaf nitrogen (N), phosphorus (P), soluble sugars and starch. We found that LMA, and area-based N, P, sugars and starch concentrations were all higher in sun-exposed/upper canopy leaves, compared with their shaded/lower canopy and deep-shade/understory counterparts; similarly, area-based rates of R-D, R-L and A(sat) (at 28aEuro...A degrees C) were all higher in the upper canopy leaves, indicating higher metabolic capacity in the upper canopy. The extent to which light inhibited R did not differ significantly between upper and lower canopy leaves, with the overall average inhibition being 32% across both canopy levels. Log-log R-D-A(sat) relationships differed between upper and lower canopy leaves, with upper canopy leaves exhibiting higher rates of R-D for a given A(sat) (both on an area and mass basis), as well as higher mass-based rates of R-D for a given [N] and [P]. Over the 25-45aEuro...A degrees C range, the T-sensitivity of R-D was similar in upper and lower canopy leaves, with both canopy positions exhibiting Q(10) values near 2.0 (i.e., doubling for every 10aEuro...A degrees C rise in T) and T-max values near 60aEuro...A degrees C (i.e., T where R-D reached maximal values). Thus, while rates of R-D at 28aEuro...A degrees C decreased with increasing depth in the canopy, the T-dependence of R-D remained constant; these findings have important implications for vegetation-climate models that seek to predict carbon fluxes between tropical lowland rainforests and the atmosphere. |
| 学科主题 | Forestry |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://210.75.237.14/handle/351003/26529]  |
| 专题 | 成都生物研究所_生态研究 |
| 推荐引用方式 GB/T 7714 | Weerasinghe, Lasantha K.,Creek, Danielle,Crous, Kristine Y.,et al. Canopy position affects the relationships between leaf respiration and associated traits in a tropical rainforest in Far North Queensland[J]. TREE PHYSIOLOGY,2014,34(6):564-584. |
| APA | Weerasinghe, Lasantha K..,Creek, Danielle.,Crous, Kristine Y..,Xiang, Shuang.,Liddell, Michael J..,...&Atkin, Owen K..(2014).Canopy position affects the relationships between leaf respiration and associated traits in a tropical rainforest in Far North Queensland.TREE PHYSIOLOGY,34(6),564-584. |
| MLA | Weerasinghe, Lasantha K.,et al."Canopy position affects the relationships between leaf respiration and associated traits in a tropical rainforest in Far North Queensland".TREE PHYSIOLOGY 34.6(2014):564-584. |
入库方式： OAI收割
来源：成都生物研究所
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