Leaf functional traits of plant community with different hydrothermal gradients in Horqin sandy grassland

doi:10.7522/j.issn.1000-694X.2023.00093

Journal of Desert Research ›› 2024, Vol. 44 ›› Issue (2): 143-150.DOI: 10.7522/j.issn.1000-694X.2023.00093

Leaf functional traits of plant community with different hydrothermal gradients in Horqin sandy grassland

Yuanzhong Zhu¹^,²(), Wenda Huang¹(), Hailun Yu¹, Yuanzheng He¹^,², Huaihai Wang¹^,², Shangbin Shi¹^,², Zhiqiang Kou³

^1.Naiman Desertification Research Station，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^2.University of Chinese Academy of Sciences，Beijing 100049，China
^3.Water Conservancy Development Center of Inner Mongolia，Hohhot 010020，China

Received:2023-07-13 Revised:2023-10-27 Online:2024-03-20 Published:2024-03-19
Contact: Wenda Huang

Abstract

Abstract:

Plant functional traits could respond to habitat variation and also determine ecosystem functions. Exploring the relationship between plant functional traits and their variation along hydrothermal gradients is of great significance for understanding the relationship between plant carbon and water metabolism of vegetation at community level and the physiological and ecological mechanism of maintaining water balance under different climatic conditions. In recent years， there are relatively few studies on the relationship between community level functional traits and environmental factors， especially the response of plant community functional traits to climate gradient in semi-arid sandy grassland. Therefore， this study was conducted using a community in Horqin sandy grassland， where the responses of community functional traits to hydrothermal gradients were analyzed. The results showed that：（1） Community functional traits had different changing trends with different hydrothermal gradients in sandy grassland. Community height increased significantly along increasing regional temperature. Community height， leaf area， specific leaf area decreased significantly along decreasing regional precipitation， while leaf thickness， leaf dry matter content， leaf tissue density significantly along increasing regional temperature. （2） Community height was significantly and positively correlated with leaf area and thickness was significantly and positively correlated with leaf dry matter content. Leaf area， specific leaf area were negatively correlated with leaf dry matter content， leaf thickness and leaf tissue density were negatively correlated with leaf dry matter content. （3） Results of redundancy analysis showed that climatic factors accounted for 54.66% of the variation of plant traits， precipitation was affecting the community functional traits of the main environmental factors in sandy grassland.

Key words: sandy grassland, hydrothermal gradient, community functional trait, redundancy analysis

CLC Number:

Q948

Yuanzhong Zhu, Wenda Huang, Hailun Yu, Yuanzheng He, Huaihai Wang, Shangbin Shi, Zhiqiang Kou. Leaf functional traits of plant community with different hydrothermal gradients in Horqin sandy grassland[J]. Journal of Desert Research, 2024, 44(2): 143-150.

Figures/Tables 7

References 46

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采样点	优势种
扎鲁特旗	砂蓝刺头(Echinops gmelini)、大果虫实(Corispermum macrocarpum)、猪毛蒿(Artemisia scoparia)、狗尾草(Setaria viridis)
阿鲁科尔沁旗	砂蓝刺头(E. gmelini)、糙隐子草(Cleistogenes squarrosa)、猪毛蒿(A. scoparia)、达乌里胡枝子(Lespedeza davurica)
奈曼旗	大果虫实(C. macrocarpum)、狗尾草(S. viridis)、达乌里胡枝子(L. davurica)、野麻子(Datura stramonium)
科尔沁左翼后旗	尖头叶藜(Chenopodium acuminatum)、狗尾草(S. viridis)、虎尾草(Chloris virgata)、砂蓝刺头(E.gmelini)
翁牛特旗	猪毛蒿(A. scoparia)、达乌里胡枝子(L. davurica)、砂蓝刺头(E. gmelini)、蒺藜(Tribulus terrestris)、五星蒿(Bassia dasyphylla)

采样点	优势种
扎鲁特旗	砂蓝刺头(Echinops gmelini)、大果虫实(Corispermum macrocarpum)、猪毛蒿(Artemisia scoparia)、狗尾草(Setaria viridis)
阿鲁科尔沁旗	砂蓝刺头(E. gmelini)、糙隐子草(Cleistogenes squarrosa)、猪毛蒿(A. scoparia)、达乌里胡枝子(Lespedeza davurica)
奈曼旗	大果虫实(C. macrocarpum)、狗尾草(S. viridis)、达乌里胡枝子(L. davurica)、野麻子(Datura stramonium)
科尔沁左翼后旗	尖头叶藜(Chenopodium acuminatum)、狗尾草(S. viridis)、虎尾草(Chloris virgata)、砂蓝刺头(E.gmelini)
翁牛特旗	猪毛蒿(A. scoparia)、达乌里胡枝子(L. davurica)、砂蓝刺头(E. gmelini)、蒺藜(Tribulus terrestris)、五星蒿(Bassia dasyphylla)

因素	df	株高		叶面积		叶厚度		比叶面积		叶干物质含量		叶组织密度
因素	df	F	P	F	P	F	P	F	P	F	P	F	P
温度梯度	2	3.395	0.042	5.529	0.007	7.362	0.002	1.133	0.330	0.886	0.419	3.095	0.055
降水梯度	2	5.038	0.008	3.609	0.034	34.250	<0.001	4.484	0.016	32.731	<0.001	5.236	0.009

因素	df	株高		叶面积		叶厚度		比叶面积		叶干物质含量		叶组织密度
因素	df	F	P	F	P	F	P	F	P	F	P	F	P
温度梯度	2	3.395	0.042	5.529	0.007	7.362	0.002	1.133	0.330	0.886	0.419	3.095	0.055
降水梯度	2	5.038	0.008	3.609	0.034	34.250	<0.001	4.484	0.016	32.731	<0.001	5.236	0.009

指标	叶面积	叶厚度	比叶面积	叶干物质含量	叶组织密度
株高	0.149	-0.234^*	0.364^**	-0.214	-0.072
叶面积		-0.019	0.195	-0.314^**	-0.426^**
叶厚度			-0.319^**	0.340^**	-0.229^*
比叶面积				-0.394^**	-0.198
叶干物质含量					0.460^**

Leaf functional traits of plant community with different hydrothermal gradients in Horqin sandy grassland

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植被特征	解释方差	因子	解释率/%	F	P	RDA1	RDA2
群落功能性状	解释方差					49.92	4.74
	解释方差(累积)					49.92	54.66
		年均气温	43.4	5	0.006
		年降水量	11.2	1.3	0.276

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