globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12540
论文题名:
Big eucalypts grow more slowly in a warm climate: Evidence of an interaction between tree size and temperature
作者: Prior L.D.; Bowman D.M.J.S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期:9
起始页码: 2793
结束页码: 2799
语种: 英语
英文关键词: Australia ; Climatic gradient ; Continental scale ; Eucalyptus ; Tall trees ; Temperature ; Tree growth ; Water availability
Scopus关键词: climate change ; drought stress ; environmental gradient ; forest ecosystem ; global warming ; growth rate ; size ; temperate environment ; temperature ; tree ; water availability ; Australia ; Eucalyptus ; anatomy and histology ; Australia ; body size ; climate ; comparative study ; Eucalyptus ; growth, development and aging ; physiology ; statistical model ; temperature ; Australia ; Body Size ; Climate ; Eucalyptus ; Linear Models ; Temperature
英文摘要: Large trees are critical components of forest ecosystems, but are declining in many forests worldwide. We predicted that growth of large trees is more vulnerable than that of small trees to high temperatures, because respiration and tissue maintenance costs increase with temperature more rapidly than does photosynthesis and these costs may be disproportionately greater in large trees. Using 5 00 000 measurements of eucalypt growth across temperate Australia, we found that high temperatures do appear to impose a larger growth penalty on large trees than on small ones. Average stem diameter growth rates at 21 °C compared with 11 °C mean annual temperature were 57% lower for large trees (58 cm stem diameter), but only 29% lower for small trees (18 cm diameter). While our results are consistent with an impaired carbon budget for large trees at warmer sites, we cannot discount causes such as hydraulic stress. We conclude that slower growth rates will impede recovery from extreme events, exacerbating the effects of higher temperatures, increased drought stress and more frequent fire on the tall eucalypt forests of southern Australia. © 2014 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62141
Appears in Collections:影响、适应和脆弱性

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作者单位: School of Biological Sciences, University of Tasmania, Private Bag 55, Hobart, TAS, 7000, Australia

Recommended Citation:
Prior L.D.,Bowman D.M.J.S.. Big eucalypts grow more slowly in a warm climate: Evidence of an interaction between tree size and temperature[J]. Global Change Biology,2014-01-01,20(9)
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