Community characteristics of Leymus chinensis steppe in Nei Mongol, China

doi:10.17521/cjpe.2023.0235

Abstract

Abstract:

Leymus chinensis alliance, one of the most widely distributed communities in China’s temperate steppe, is a grassland vegetation type with the highest utilization value for animal husbandry. Investigating the distribution and community characteristics of Leymus chinensis formations can provide data for the management and restoration of natural grasslands. In this study, we investigated the characteristics of L. chinensis communities of 46 sites in Nei Mongol, including species composition, ecological characteristics, and community classification of L. chinensis alliance. A total of 187 vascular species, belonging to 109 genera and 37 families, were recorded. Asteraceae was the family with the most species, while Artemisia was the genus with the most species. Perennial herbs were the dominant life form, accounting for 71.66% of the total species. Xerophyte dominated the communities, accounting for 67.38% of the total species. The geographic composition of the system was dominated by the Eastern Palearctic species, followed by the Central Asian species. The L. chinensis alliance could be divided into 8 association groups, including Leymus chinensis - tussock, Leymus chinensis - semi-shrubby, Leymus chinensis - rhizome, Leymus chinensis - Carex, Leymus chinensis - annual/biennial, Shrub - Leymus chinensis, Leymus chinensis - bulbiferous herb and Leymus chinensis - forb and 26 associations.

Key words: Leymus chinensis, steppe, community characteristics, Nei Mongol

YAO Zhen-Yu, XIN Yue, MU Wen-Kui, ZHANG Quan-Min, YANG Liu, ZHAO Li-Qing. Community characteristics of Leymus chinensis steppe in Nei Mongol, China[J]. Chin J Plant Ecol, 2024, 48(10): 1385-1392.

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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2023.0235

https://www.plant-ecology.com/EN/Y2024/V48/I10/1385

Figures/Tables 4

References 14

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因子 Factor	单位 Unit	最小值 Min	最大值 Max	平均值 Mean
物种丰富度 Species richness	m^-2	6	40	21
群落盖度 Community coverage	%	17	58	32.5
地上生物量 Aboveground biomass	g·m^-2	28.5	395.7	135.7
海拔 Altitude	m	580	1 888	1 328.4
坡度 Slope	°	0.95	14.92	4.94
年平均气温 Mean annual air temperature	℃	-1.6	6.7	2.7
最湿季平均气温 Mean air temperature of the wettest quarter	℃	15.9	20.9	18.4
最干季平均气温 Mean air temperature of the driest quarter	℃	-24.0	-8.3	-14.7
年降水量 Annual precipitation	mm	218	394	288.8
最湿季降水量 Precipitation of the driest quarter	mm	153	261	194.9
最干季降水量 Precipitation of the wettest quarter	mm	4	14	7.8

因子 Factor	单位 Unit	最小值 Min	最大值 Max	平均值 Mean
物种丰富度 Species richness	m^-2	6	40	21
群落盖度 Community coverage	%	17	58	32.5
地上生物量 Aboveground biomass	g·m^-2	28.5	395.7	135.7
海拔 Altitude	m	580	1 888	1 328.4
坡度 Slope	°	0.95	14.92	4.94
年平均气温 Mean annual air temperature	℃	-1.6	6.7	2.7
最湿季平均气温 Mean air temperature of the wettest quarter	℃	15.9	20.9	18.4
最干季平均气温 Mean air temperature of the driest quarter	℃	-24.0	-8.3	-14.7
年降水量 Annual precipitation	mm	218	394	288.8
最湿季降水量 Precipitation of the driest quarter	mm	153	261	194.9
最干季降水量 Precipitation of the wettest quarter	mm	4	14	7.8

群丛组 Association Group	群丛 Association	样地数 Number of plots
羊草-丛生禾草群丛组 Leymus chinensis - Tussock Association Group	羊草-大针茅群丛 Leymus chinensis - Stipa grandis Association	2
	羊草-西北针茅群丛 Leymus chinensis - Stipa sareptana var. krylovii Association	5
	羊草-长芒草-细叶韭群丛 Leymus chinensis - Stipa bungeana - Allium tenuissimum Association	1
	羊草-短花针茅群丛 Leymus chinensis - Stipa breviflora Association	3
	羊草-冰草-羽茅群丛 Leymus chinensis - Agropyron cristatum - Achnatherum sibiricum Association	1
	羊草-糙隐子草群丛 Leymus chinensis - Cleistogenes squarrosa Association	2
	羊草-无芒隐子草群丛 Leymus chinensis - Cleistogenes songorica Association	2
羊草-半灌木群丛组 Leymus chinensis - Semi-shrubby Association Group	羊草-冷蒿群丛 Leymus chinensis - Artemisia frigida Association	2
	羊草-细裂叶莲蒿群丛 Leymus chinensis - Artemisia gmelinii Association	2
羊草-根茎型禾草群丛组 Leymus chinensis - Rhizome Association Group	羊草+赖草群丛 Leymus chinensis + Leymus secalinus Association	1
羊草-薹草类群丛组 Leymus chinensis - Carex Association Group	羊草-寸草群丛 Leymus chinensis - Carex duriuscula Association	3
	羊草-黄囊薹草群丛 Leymus chinensis - Carex korshinskyi Association	1
	羊草-柄状薹草-薄鞘隐子草群丛 Leymus chinensis - Carex pediformis - Cleistogenes festucacea Association	1
羊草-一、二年生草本群丛组 Leymus chinensis - Annual/Biennial Association Group	羊草-尖头叶藜群丛 Leymus chinensis - Chenopodium acuminatum Association	2
灌丛化羊草群丛组 Shrub - Leymus chinensis Association Group	小叶锦鸡儿-羊草-冰草群丛 Caragana microphylla - Leymus chinensis - Agropyron cristatum Association	2
	甘蒙锦鸡儿-羊草-冰草群丛 Caragana opulens - Leymus chinensis - Agropyron cristatum Association	1
	小叶锦鸡儿-羊草-西北针茅群丛 Caragana microphylla - Leymus chinensis - Stipa sareptana var. krylovii Association	2
羊草-鳞茎型草本群丛组 Leymus chinensis - Bulbiferous Herb Association Group	羊草-碱韭群丛 Leymus chinensis - Allium polyrhizum Association	2
	羊草-野韭群丛 Leymus chinensis - Allium ramosum Association	1
羊草-杂类草群丛组 Leymus chinensis - Forb Association Group	羊草-花苜蓿群丛 Leymus chinensis - Medicago ruthenica Association	3
	羊草-柔毛蒿群丛 Leymus chinensis - Artemisia pubescens Association	1
	羊草-星毛委陵菜群丛 Leymus chinensis - Potentilla acaulis Association	1
	羊草-阿尔泰狗娃花-芨芨草群丛 Leymus chinensis - Aster altaicus - Achnatherum splendens Association	1
	羊草-银灰旋花群丛 Leymus chinensis - Convolvulus ammannii Association	1
	羊草-东北丝裂蒿群丛 Leymus chinensis - Artemisia adamsii Association	2
	羊草-裂叶蒿群丛 Leymus chinensis - Artemisia tanacetifolia Association	1

群丛组 Association Group	群丛 Association	样地数 Number of plots
羊草-丛生禾草群丛组 Leymus chinensis - Tussock Association Group	羊草-大针茅群丛 Leymus chinensis - Stipa grandis Association	2
	羊草-西北针茅群丛 Leymus chinensis - Stipa sareptana var. krylovii Association	5
	羊草-长芒草-细叶韭群丛 Leymus chinensis - Stipa bungeana - Allium tenuissimum Association	1
	羊草-短花针茅群丛 Leymus chinensis - Stipa breviflora Association	3
	羊草-冰草-羽茅群丛 Leymus chinensis - Agropyron cristatum - Achnatherum sibiricum Association	1
	羊草-糙隐子草群丛 Leymus chinensis - Cleistogenes squarrosa Association	2
	羊草-无芒隐子草群丛 Leymus chinensis - Cleistogenes songorica Association	2
羊草-半灌木群丛组 Leymus chinensis - Semi-shrubby Association Group	羊草-冷蒿群丛 Leymus chinensis - Artemisia frigida Association	2
	羊草-细裂叶莲蒿群丛 Leymus chinensis - Artemisia gmelinii Association	2
羊草-根茎型禾草群丛组 Leymus chinensis - Rhizome Association Group	羊草+赖草群丛 Leymus chinensis + Leymus secalinus Association	1
羊草-薹草类群丛组 Leymus chinensis - Carex Association Group	羊草-寸草群丛 Leymus chinensis - Carex duriuscula Association	3
	羊草-黄囊薹草群丛 Leymus chinensis - Carex korshinskyi Association	1
	羊草-柄状薹草-薄鞘隐子草群丛 Leymus chinensis - Carex pediformis - Cleistogenes festucacea Association	1
羊草-一、二年生草本群丛组 Leymus chinensis - Annual/Biennial Association Group	羊草-尖头叶藜群丛 Leymus chinensis - Chenopodium acuminatum Association	2
灌丛化羊草群丛组 Shrub - Leymus chinensis Association Group	小叶锦鸡儿-羊草-冰草群丛 Caragana microphylla - Leymus chinensis - Agropyron cristatum Association	2
	甘蒙锦鸡儿-羊草-冰草群丛 Caragana opulens - Leymus chinensis - Agropyron cristatum Association	1
	小叶锦鸡儿-羊草-西北针茅群丛 Caragana microphylla - Leymus chinensis - Stipa sareptana var. krylovii Association	2
羊草-鳞茎型草本群丛组 Leymus chinensis - Bulbiferous Herb Association Group	羊草-碱韭群丛 Leymus chinensis - Allium polyrhizum Association	2
	羊草-野韭群丛 Leymus chinensis - Allium ramosum Association	1
羊草-杂类草群丛组 Leymus chinensis - Forb Association Group	羊草-花苜蓿群丛 Leymus chinensis - Medicago ruthenica Association	3
	羊草-柔毛蒿群丛 Leymus chinensis - Artemisia pubescens Association	1
	羊草-星毛委陵菜群丛 Leymus chinensis - Potentilla acaulis Association	1
	羊草-阿尔泰狗娃花-芨芨草群丛 Leymus chinensis - Aster altaicus - Achnatherum splendens Association	1
	羊草-银灰旋花群丛 Leymus chinensis - Convolvulus ammannii Association	1
	羊草-东北丝裂蒿群丛 Leymus chinensis - Artemisia adamsii Association	2
	羊草-裂叶蒿群丛 Leymus chinensis - Artemisia tanacetifolia Association	1

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