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Article: Sap flow dynamics of xerophytic shrubs differ significantly among rainfall categories in the Loess Plateau of China

TitleSap flow dynamics of xerophytic shrubs differ significantly among rainfall categories in the Loess Plateau of China
Authors
KeywordsDrylands
Inter-specific variation
Rainfall category
Sap flow
Xerophytic shrub
Issue Date2020
Citation
Journal of Hydrology, 2020, v. 585, article no. 124815 How to Cite?
AbstractGlobal climate change is likely to change the timing, frequency and magnitude of precipitation events, studying the response of sap flow (SF) of plants to rainfall events is thus important for understanding the response of ecosystems to global climate change. Here, we conducted a comprehensive study on the SF, rainfall events, meteorological factors and soil water content (SWC) for two typical xerophytic shrub stands (Caragana korshinskii and Salix psammophila) on the Loess Plateau of China for two rainy seasons (June-September) in 2015 and 2016. The rainfall events were classified into three rainfall categories using the K-means clustering based on the rainfall amount (RA), rainfall duration (RD) and rainfall intensity (RI) (category I: lowest mean RA, RD and RI, category II: moderate mean RA, RI and highest mean RD and category III: highest mean RA, RI and moderate mean RD). The results showed that the response of SF at both C. korshinskii and S. psammophila stands to rainfall events differed within the three categories. The occurrence of rainfall events significantly decreased daily SF of C. korshinskii in three rainfall categories, whereas the daily SF of S. psammophila is more strongly influenced by rainfall category II. Maximum decreases in daily SF between the pre-rainfall and the rainfall weather condition of the two stands both occurred in rainfall category II. Daily rainfall SF at both stands was strongly correlated with daily SR, RH and VPD, regardless of the rainfall categories. Diurnal variation of hourly SF at both stands also differed among the days with similar RA and RD in the same rainfall category. It can be inferred that SF of C. korshinskii is more susceptible to rainfall events than S. psammophila. Rainfall characteristics (RA, RD and RI) and rainfall distribution should be fully considered when assessing the response of SF of shrubs to rainfall events.
Persistent Identifierhttp://hdl.handle.net/10722/318818
ISSN
2023 Impact Factor: 5.9
2023 SCImago Journal Rankings: 1.764
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, Di-
dc.contributor.authorGao, Guangyao-
dc.contributor.authorLi, Junran-
dc.contributor.authorYuan, Chuan-
dc.contributor.authorLü, Yihe-
dc.contributor.authorFu, Bojie-
dc.date.accessioned2022-10-11T12:24:38Z-
dc.date.available2022-10-11T12:24:38Z-
dc.date.issued2020-
dc.identifier.citationJournal of Hydrology, 2020, v. 585, article no. 124815-
dc.identifier.issn0022-1694-
dc.identifier.urihttp://hdl.handle.net/10722/318818-
dc.description.abstractGlobal climate change is likely to change the timing, frequency and magnitude of precipitation events, studying the response of sap flow (SF) of plants to rainfall events is thus important for understanding the response of ecosystems to global climate change. Here, we conducted a comprehensive study on the SF, rainfall events, meteorological factors and soil water content (SWC) for two typical xerophytic shrub stands (Caragana korshinskii and Salix psammophila) on the Loess Plateau of China for two rainy seasons (June-September) in 2015 and 2016. The rainfall events were classified into three rainfall categories using the K-means clustering based on the rainfall amount (RA), rainfall duration (RD) and rainfall intensity (RI) (category I: lowest mean RA, RD and RI, category II: moderate mean RA, RI and highest mean RD and category III: highest mean RA, RI and moderate mean RD). The results showed that the response of SF at both C. korshinskii and S. psammophila stands to rainfall events differed within the three categories. The occurrence of rainfall events significantly decreased daily SF of C. korshinskii in three rainfall categories, whereas the daily SF of S. psammophila is more strongly influenced by rainfall category II. Maximum decreases in daily SF between the pre-rainfall and the rainfall weather condition of the two stands both occurred in rainfall category II. Daily rainfall SF at both stands was strongly correlated with daily SR, RH and VPD, regardless of the rainfall categories. Diurnal variation of hourly SF at both stands also differed among the days with similar RA and RD in the same rainfall category. It can be inferred that SF of C. korshinskii is more susceptible to rainfall events than S. psammophila. Rainfall characteristics (RA, RD and RI) and rainfall distribution should be fully considered when assessing the response of SF of shrubs to rainfall events.-
dc.languageeng-
dc.relation.ispartofJournal of Hydrology-
dc.subjectDrylands-
dc.subjectInter-specific variation-
dc.subjectRainfall category-
dc.subjectSap flow-
dc.subjectXerophytic shrub-
dc.titleSap flow dynamics of xerophytic shrubs differ significantly among rainfall categories in the Loess Plateau of China-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jhydrol.2020.124815-
dc.identifier.scopuseid_2-s2.0-85081134430-
dc.identifier.volume585-
dc.identifier.spagearticle no. 124815-
dc.identifier.epagearticle no. 124815-
dc.identifier.isiWOS:000544230000070-

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