Climate Seasonality Mediates Global Patterns of Foliar Carbon and Nitrogen Isotopes

被引:2
|
作者
Du, Lan [1 ,2 ,3 ]
Li, Yan [1 ,3 ]
Zheng, Xinjun [1 ,3 ]
机构
[1] Chinese Acad Sci, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China
[2] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Fukang Stn Desert Ecol, Fukang 831505, Peoples R China
来源
FORESTS | 2023年 / 14卷 / 03期
关键词
climate seasonality; foliar ????????C-13; foliar delta N-15; woody plant; water-use efficiency; nitrogen availability; WATER-USE EFFICIENCY; MYCORRHIZAL FUNGI; NATURAL-ABUNDANCE; STOMATAL SENSITIVITY; PLANT; N-15; LEAF; PHOTOSYNTHESIS; DISCRIMINATION; RESPONSES;
D O I
10.3390/f14030461
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
Frequent extreme climate events have significantly affected plant intrinsic water-use efficiency (iWUE) and forest nitrogen (N) availability. Understanding the coupling between climate seasonality and plant water, carbon, and nitrogen may provide insights into how plants respond to climate change. Here, we integrated ?C-13 and d(15)N in woody plant leaves as a probe to elucidate the iWUE and N availability patterns of plants under global change and found that woody plants from sites with high climate seasonality, especially precipitation seasonality, tend to have improved iWUE and N availability compared with those with low seasonality. Specifically, high potential evapotranspiration, solar radiation, vapor pressure deficit, and low precipitation during the growth season are the driving factors. The intra-annual and annual climate explained 43% and 49% of ?C-13 and 40% and 53% of d(15)N, respectively, suggesting that the intra-annual climate is at least as important as the annual climate. These results suggest that not only the direction (decrease vs. increase) of decadal climate should be counted but also the abnormal fluctuation of intra-annual should be considered. Climate seasonality is a more suitable ecological filter for determining plant distribution across terrestrial ecosystems.
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页数:14
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