Critical temperatures controlling the phenology and radial growth of Pinus sylvestris var. Mongolica on the southern margin of a cold temperate coniferous forest

Temperature plays a key role in phenology and growth of dominant tree species and hence in the structure and function of coniferous forests in cold temperate zones. We used a dendrochronological method to determine the critical temperatures of Pinus sylvestris var. mongolica (Mongolian pine) radial...

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Autores principales:	Junxia Li, Fangbo Song, Yuting Jin, Ruixin Yun, Zhenju Chen, Zhaoyang Lyu, Ying Zhao, Di Cui
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Pinus sylvestris var. mongolica Tree ring Critical temperature Growing season Radial growth Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/6510328a15ae4949bec086b11b0a60f6
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spelling	oai:doaj.org-article:6510328a15ae4949bec086b11b0a60f62021-12-01T04:50:57ZCritical temperatures controlling the phenology and radial growth of Pinus sylvestris var. Mongolica on the southern margin of a cold temperate coniferous forest1470-160X10.1016/j.ecolind.2021.107674https://doaj.org/article/6510328a15ae4949bec086b11b0a60f62021-07-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21003393https://doaj.org/toc/1470-160XTemperature plays a key role in phenology and growth of dominant tree species and hence in the structure and function of coniferous forests in cold temperate zones. We used a dendrochronological method to determine the critical temperatures of Pinus sylvestris var. mongolica (Mongolian pine) radial growth and the xylem growing season. Results showed that Mongolian pine radial growth is sensitive to daily mean temperatures of 4.0–5.5 °C in early spring, 14.0 °C in summer and 2.0–2.5 °C in autumn. A temperature of 4 °C might be the initial temperature required for sap flow, photosynthesis and tree germination in this area in early spring, and 5.5 °C is the most critical temperature for earlywood onset growth. The advance and extension of temperature 14.0 °C in summer can exacerbate water stress for trees and inhibit earlywood growth under the condition of insufficient precipitation. In autumn, 2.0–2.5 °C may be the minimum temperature for the xylem growth. These critical temperatures are important in predicting the changes in the phenology of cambial activity and the growth of conifers in cold temperate regions under a scenario of a warming climate. We defined the mean xylem growing season of pines in this region as 151 days from early May to early October. With the increase in temperatures during 1972–2015, the start date of the xylem growing season advanced by 0.24 days/year, the duration of the xylem growing season increased by 0.27 days/year and the basal area increment of Mongolian pine increased significantly (P < 0.01). The influence of the earlier and longer xylem growing season compensated the negative effect of high initial temperature (14.0–15.0 °C) in some months, resulting in an increase in tree radial increment in this area. The warmer climate will lead to a longer xylem growing season, resulting in greater wood production with an adequate supply of water available.Junxia LiFangbo SongYuting JinRuixin YunZhenju ChenZhaoyang LyuYing ZhaoDi CuiElsevierarticlePinus sylvestris var. mongolicaTree ringCritical temperatureGrowing seasonRadial growthEcologyQH540-549.5ENEcological Indicators, Vol 126, Iss , Pp 107674- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Pinus sylvestris var. mongolica Tree ring Critical temperature Growing season Radial growth Ecology QH540-549.5
spellingShingle	Pinus sylvestris var. mongolica Tree ring Critical temperature Growing season Radial growth Ecology QH540-549.5 Junxia Li Fangbo Song Yuting Jin Ruixin Yun Zhenju Chen Zhaoyang Lyu Ying Zhao Di Cui Critical temperatures controlling the phenology and radial growth of Pinus sylvestris var. Mongolica on the southern margin of a cold temperate coniferous forest
description	Temperature plays a key role in phenology and growth of dominant tree species and hence in the structure and function of coniferous forests in cold temperate zones. We used a dendrochronological method to determine the critical temperatures of Pinus sylvestris var. mongolica (Mongolian pine) radial growth and the xylem growing season. Results showed that Mongolian pine radial growth is sensitive to daily mean temperatures of 4.0–5.5 °C in early spring, 14.0 °C in summer and 2.0–2.5 °C in autumn. A temperature of 4 °C might be the initial temperature required for sap flow, photosynthesis and tree germination in this area in early spring, and 5.5 °C is the most critical temperature for earlywood onset growth. The advance and extension of temperature 14.0 °C in summer can exacerbate water stress for trees and inhibit earlywood growth under the condition of insufficient precipitation. In autumn, 2.0–2.5 °C may be the minimum temperature for the xylem growth. These critical temperatures are important in predicting the changes in the phenology of cambial activity and the growth of conifers in cold temperate regions under a scenario of a warming climate. We defined the mean xylem growing season of pines in this region as 151 days from early May to early October. With the increase in temperatures during 1972–2015, the start date of the xylem growing season advanced by 0.24 days/year, the duration of the xylem growing season increased by 0.27 days/year and the basal area increment of Mongolian pine increased significantly (P < 0.01). The influence of the earlier and longer xylem growing season compensated the negative effect of high initial temperature (14.0–15.0 °C) in some months, resulting in an increase in tree radial increment in this area. The warmer climate will lead to a longer xylem growing season, resulting in greater wood production with an adequate supply of water available.
format	article
author	Junxia Li Fangbo Song Yuting Jin Ruixin Yun Zhenju Chen Zhaoyang Lyu Ying Zhao Di Cui
author_facet	Junxia Li Fangbo Song Yuting Jin Ruixin Yun Zhenju Chen Zhaoyang Lyu Ying Zhao Di Cui
author_sort	Junxia Li
title	Critical temperatures controlling the phenology and radial growth of Pinus sylvestris var. Mongolica on the southern margin of a cold temperate coniferous forest
title_short	Critical temperatures controlling the phenology and radial growth of Pinus sylvestris var. Mongolica on the southern margin of a cold temperate coniferous forest
title_full	Critical temperatures controlling the phenology and radial growth of Pinus sylvestris var. Mongolica on the southern margin of a cold temperate coniferous forest
title_fullStr	Critical temperatures controlling the phenology and radial growth of Pinus sylvestris var. Mongolica on the southern margin of a cold temperate coniferous forest
title_full_unstemmed	Critical temperatures controlling the phenology and radial growth of Pinus sylvestris var. Mongolica on the southern margin of a cold temperate coniferous forest
title_sort	critical temperatures controlling the phenology and radial growth of pinus sylvestris var. mongolica on the southern margin of a cold temperate coniferous forest
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/6510328a15ae4949bec086b11b0a60f6
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Critical temperatures controlling the phenology and radial growth of Pinus sylvestris var. Mongolica on the southern margin of a cold temperate coniferous forest

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