气候变化领域集成服务门户(CCPortal): Will trees or grasses profit from changing rainfall regimes in savannas?

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DOI	10.1111/nph.19538
	Will trees or grasses profit from changing rainfall regimes in savannas?
	Wigley, Benjamin J.; Coetsee, Corli; February, Edmund C.; Dobelmann, Svenja; Higgins, Steven I.
发表日期	2024
ISSN	0028-646X
EISSN	1469-8137
起始页码	241
结束页码	6
卷号	241 期号:6
英文摘要	Increasing rainfall variability is widely expected under future climate change scenarios. How will savanna trees and grasses be affected by growing season dry spells and altered seasonality and how tightly coupled are tree-grass phenologies with rainfall?We measured tree and grass responses to growing season dry spells and dry season rainfall. We also tested whether the phenologies of 17 deciduous woody species and the Soil Adjusted Vegetation Index of grasses were related to rainfall between 2019 and 2023.Tree and grass growth was significantly reduced during growing season dry spells. Tree growth was strongly related to growing season soil water potentials and limited to the wet season. Grasses can rapidly recover after growing season dry spells and grass evapotranspiration was significantly related to soil water potentials in both the wet and dry seasons. Tree leaf flushing commenced before the rainfall onset date with little subsequent leaf flushing. Grasses grew when moisture became available regardless of season.Our findings suggest that increased dry spell length and frequency in the growing season may slow down tree growth in some savannas, which together with longer growing seasons may allow grasses an advantage over C3 plants that are advantaged by rising CO2 levels.
英文关键词	changing seasonality of rainfall; growing season dry spell; phenology; rainfall variability; savanna; SAVI; temporal niche separation; tree-grass coexistence
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:001145811300001
来源期刊	NEW PHYTOLOGIST
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/297404
作者单位	University of Bayreuth; Nelson Mandela University; University of Cape Town; University of Wurzburg
推荐引用方式 GB/T 7714	Wigley, Benjamin J.,Coetsee, Corli,February, Edmund C.,et al. Will trees or grasses profit from changing rainfall regimes in savannas?[J],2024,241(6).
APA	Wigley, Benjamin J.,Coetsee, Corli,February, Edmund C.,Dobelmann, Svenja,&Higgins, Steven I..(2024).Will trees or grasses profit from changing rainfall regimes in savannas?.NEW PHYTOLOGIST,241(6).
MLA	Wigley, Benjamin J.,et al."Will trees or grasses profit from changing rainfall regimes in savannas?".NEW PHYTOLOGIST 241.6(2024).