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.
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
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132781
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]. Forest Ecology and Management,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.,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".469(2020).