Climate Change Data Portal
DOI | 10.1093/jpe/rty004 |
Comparative water relations of co-occurring trees in a mixed podocarp-broadleaf forest | |
Kaplick, Julia1; Clearwater, Michael J.2; Macinnis-Ng, Cate1 | |
发表日期 | 2019 |
ISSN | 1752-9921 |
EISSN | 1752-993X |
卷号 | 12期号:1页码:163-175 |
英文摘要 | Aims As extreme climatic events including droughts and heat waves become more common in a changing climate, tree mortality has increased across the globe. In order to determine whether certain species have a competitive advantage over others, we explored the water-relations and leaf-gas exchange of four co-occurring species in a forest in northern Aotearoa-New Zealand. We studied the ecologically and culturally significant foundation species, Agathis australis (a conifer), two additional conifers, Phyllocladus trichomanoides and Podocarpus totara and the angiosperm Knightia excelsa. Methods We measured sap flow, leaf-gas exchange and xylem water potentials of leaves and terminal branches with concurrent measures of micrometeorological data on days with very few clouds. We derived whole tree hydraulic conductance and instantaneous water-use efficiency (WUEi) at our remnant forest in west Auckland during February 2015 (southern hemisphere summer). Important Findings The four species behaved similarly in their diurnal curves of gas exchange and water potential. Rates of assimilation, stomatal conductance and WUEi were similar among trees of different species. Whole tree hydraulic conductance was also similar among species. These results indicate functional convergence in water relations, possibly driven by low nutrient soils at the site. Our results suggest that there is no species with a clear adaptive advantage over the others in the context of climate change. |
WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology |
来源期刊 | JOURNAL OF PLANT ECOLOGY
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/92734 |
作者单位 | 1.Univ Auckland, Sch Biol Sci, Private Bag 92019, Auckland 1142, New Zealand; 2.Univ Waikato, Sch Sci, Private Bag 3105, Hamilton 3240, New Zealand |
推荐引用方式 GB/T 7714 | Kaplick, Julia,Clearwater, Michael J.,Macinnis-Ng, Cate. Comparative water relations of co-occurring trees in a mixed podocarp-broadleaf forest[J],2019,12(1):163-175. |
APA | Kaplick, Julia,Clearwater, Michael J.,&Macinnis-Ng, Cate.(2019).Comparative water relations of co-occurring trees in a mixed podocarp-broadleaf forest.JOURNAL OF PLANT ECOLOGY,12(1),163-175. |
MLA | Kaplick, Julia,et al."Comparative water relations of co-occurring trees in a mixed podocarp-broadleaf forest".JOURNAL OF PLANT ECOLOGY 12.1(2019):163-175. |
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