气候变化领域集成服务门户(CCPortal): Differential effects of drought on nonstructural carbohydrate storage in seedlings and mature trees of four species in a subtropical forest

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DOI	10.1016/j.foreco.2020.118159
	Differential effects of drought on nonstructural carbohydrate storage in seedlings and mature trees of four species in a subtropical forest
	Zhang P.; Zhou X.; Fu Y.; Shao J.; Zhou L.; Li S.; Zhou G.; Hu Z.; Hu J.; Bai S.H.; McDowell N.G.
发表日期	2020
ISSN	0378-1127
卷号	469
英文摘要	Nonstructural carbohydrates (NSC) play important roles in forest vulnerability to climate change, especially under increasing drought intensity and frequency. Understanding NSC dynamics is essential for accurately predicting the resistance and resilience of forests in response to drought. However, our knowledge of NSC responses to drought is still limited due to the lack of research in trees of different life stages. In this study, we conducted a throughfall exclusion experiment (TFE) with four subtropical evergreen tree species to examine drought effects on NSC in mature trees and understory seedlings. Our results showed the differential effects of drought on NSC dynamics of understory seedlings and mature trees. In the TFE experiment, mature trees of all four species were relatively homoeostatic with the insignificantly changed NSC pools, photosynthesis, and growth under the drought treatment compared to the control. In contrast, understory seedlings displayed significant decreases in total NSC and soluble sugars (−14.70 ± 3.66% and −16.93 ± 3.85%, respectively) with the exception of Lithocarpus glaber (L. glaber). The seedlings of L. glaber with the highest hydraulic resistance maintained or slightly increased NSC and its components in response to drought. Our study highlights the importance of life stage in assessing drought effects of trees on NSC storage and then forest C cycling, which could be incorporated into the dynamic global vegetation models (DGVMs) to better understand drought effects on forest C balance in the future. © 2020 Elsevier B.V.
英文关键词	NSC; Subtropical evergreen trees; Throughfall exclusion; Tree life stages; Understory seedlings
语种	英语
scopus关键词	Carbohydrates; Climate change; Drought; Tropics; Differential effect; Drought intensities; Evergreen tree species; Forest vulnerability; Hydraulic resistances; Non-structural carbohydrates; Subtropical forests; Throughfall exclusion; Forestry; carbohydrate; carbon balance; drought; evergreen tree; exclusion experiment; seedling; throughfall; understory; vulnerability; Carbohydrates; Drought; Forestry; Life; Resistance; Seedlings; Trees; Tropics; Lithocarpus glaber
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155230
作者单位	Tiantong National Forest Ecosystem Observation and Research Station, Center for Global Change and Ecological Forecasting, Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200062, China; Shanghai Institute of Pollution Control and Ecological Security, 1515 North Zhongshan Rd, Shanghai, 200437, China; College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510640, China; Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD 4558, Australia; Pacific Northwest National Laboratory, Richland, WA 99352, United States
推荐引用方式 GB/T 7714	Zhang P.,Zhou X.,Fu Y.,et al. Differential effects of drought on nonstructural carbohydrate storage in seedlings and mature trees of four species in a subtropical forest[J],2020,469.
APA	Zhang P..,Zhou X..,Fu Y..,Shao J..,Zhou L..,...&McDowell N.G..(2020).Differential effects of drought on nonstructural carbohydrate storage in seedlings and mature trees of four species in a subtropical forest.Forest Ecology and Management,469.
MLA	Zhang P.,et al."Differential effects of drought on nonstructural carbohydrate storage in seedlings and mature trees of four species in a subtropical forest".Forest Ecology and Management 469(2020).