Allometric scaling relationships of Larix potaninii subsp. chinensis traits across topographical gradients

The variation of phenotypic traits with environmental gradient can reveal the plant adapting strategies and predict reactions to future climate changes. However, it remains elusive, especially for alpine timberline tree species. To quantify the variation and explore the patterns of twig, leaf, stoma...

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Autores principales:	Lili Zhang, Khambay Khamphilavong, Hengchen Zhu, Hua Li, Xiaojun He, Xufang Shen, Liru Wang, Yongxiang Kang
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Alpine timberline tree Elevation Slope aspect Traits Allometric growth Climate change Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/854b4ddbf1ea44dcb31d109b5c66c66a
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spelling	oai:doaj.org-article:854b4ddbf1ea44dcb31d109b5c66c66a2021-12-01T04:47:18ZAllometric scaling relationships of Larix potaninii subsp. chinensis traits across topographical gradients1470-160X10.1016/j.ecolind.2021.107492https://doaj.org/article/854b4ddbf1ea44dcb31d109b5c66c66a2021-06-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21001576https://doaj.org/toc/1470-160XThe variation of phenotypic traits with environmental gradient can reveal the plant adapting strategies and predict reactions to future climate changes. However, it remains elusive, especially for alpine timberline tree species. To quantify the variation and explore the patterns of twig, leaf, stoma traits, and determine the scaling relationships along the topographic gradients, 576 current-year branches of Larix potaninii ssp. chinensis were collected and scaling relationships were analyzed. The results showed that the twig, leaf and stoma traits varied nonlinearly along altitudinal gradients (2900–3500 m) in both sunny and shady slopes, with a reversal point at about 3250 m, at which the optimum growth of twig length (78.53 mm), twig cross-sectional area (3.35 mm2), internode length (13.14 mm), leaf length (19.30 mm), specific leaf area (0.01 mm2mg−1), stomatal length (47.05 µm) and density (160.20 mm−2). In addition, the values of leafing intensity, leaf number and stomatal density on sunny slope, 1.52 mm−3, 88.79 and 160.20 mm−2 respectively, were higher than that on shady slope. Moreover, the relationships between leaf-twig traits were significantly correlative, and the leaf area-twig cross-sectional area and leaf intensity-leaf area scaling relationships were allometric (slope ≠ 1 or slope ≠ −1) and showed common slope with different y-intercept across altitudes and slope aspects (P < 0.01). Overall, the scaling relationships of different traits across topographical gradients were governed by functional coordination. The twig-size-leaf-size always maintains the balance between geometric dimension and mass in a certain growth rate. The inverse proportion in leaf size and number revealed its maximizing limited resource use efficiency.Lili ZhangKhambay KhamphilavongHengchen ZhuHua LiXiaojun HeXufang ShenLiru WangYongxiang KangElsevierarticleAlpine timberline treeElevationSlope aspectTraitsAllometric growthClimate changeEcologyQH540-549.5ENEcological Indicators, Vol 125, Iss , Pp 107492- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Alpine timberline tree Elevation Slope aspect Traits Allometric growth Climate change Ecology QH540-549.5
spellingShingle	Alpine timberline tree Elevation Slope aspect Traits Allometric growth Climate change Ecology QH540-549.5 Lili Zhang Khambay Khamphilavong Hengchen Zhu Hua Li Xiaojun He Xufang Shen Liru Wang Yongxiang Kang Allometric scaling relationships of Larix potaninii subsp. chinensis traits across topographical gradients
description	The variation of phenotypic traits with environmental gradient can reveal the plant adapting strategies and predict reactions to future climate changes. However, it remains elusive, especially for alpine timberline tree species. To quantify the variation and explore the patterns of twig, leaf, stoma traits, and determine the scaling relationships along the topographic gradients, 576 current-year branches of Larix potaninii ssp. chinensis were collected and scaling relationships were analyzed. The results showed that the twig, leaf and stoma traits varied nonlinearly along altitudinal gradients (2900–3500 m) in both sunny and shady slopes, with a reversal point at about 3250 m, at which the optimum growth of twig length (78.53 mm), twig cross-sectional area (3.35 mm2), internode length (13.14 mm), leaf length (19.30 mm), specific leaf area (0.01 mm2mg−1), stomatal length (47.05 µm) and density (160.20 mm−2). In addition, the values of leafing intensity, leaf number and stomatal density on sunny slope, 1.52 mm−3, 88.79 and 160.20 mm−2 respectively, were higher than that on shady slope. Moreover, the relationships between leaf-twig traits were significantly correlative, and the leaf area-twig cross-sectional area and leaf intensity-leaf area scaling relationships were allometric (slope ≠ 1 or slope ≠ −1) and showed common slope with different y-intercept across altitudes and slope aspects (P < 0.01). Overall, the scaling relationships of different traits across topographical gradients were governed by functional coordination. The twig-size-leaf-size always maintains the balance between geometric dimension and mass in a certain growth rate. The inverse proportion in leaf size and number revealed its maximizing limited resource use efficiency.
format	article
author	Lili Zhang Khambay Khamphilavong Hengchen Zhu Hua Li Xiaojun He Xufang Shen Liru Wang Yongxiang Kang
author_facet	Lili Zhang Khambay Khamphilavong Hengchen Zhu Hua Li Xiaojun He Xufang Shen Liru Wang Yongxiang Kang
author_sort	Lili Zhang
title	Allometric scaling relationships of Larix potaninii subsp. chinensis traits across topographical gradients
title_short	Allometric scaling relationships of Larix potaninii subsp. chinensis traits across topographical gradients
title_full	Allometric scaling relationships of Larix potaninii subsp. chinensis traits across topographical gradients
title_fullStr	Allometric scaling relationships of Larix potaninii subsp. chinensis traits across topographical gradients
title_full_unstemmed	Allometric scaling relationships of Larix potaninii subsp. chinensis traits across topographical gradients
title_sort	allometric scaling relationships of larix potaninii subsp. chinensis traits across topographical gradients
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/854b4ddbf1ea44dcb31d109b5c66c66a
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Allometric scaling relationships of Larix potaninii subsp. chinensis traits across topographical gradients

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