Characteristics and spatial differentiation of plant communities along the Yellow River in the Ulan Buh Desert

doi:10.7522/j.issn.1000-694X.2023.00040

Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (4): 180-190.DOI: 10.7522/j.issn.1000-694X.2023.00040

Characteristics and spatial differentiation of plant communities along the Yellow River in the Ulan Buh Desert

Kaiyuan Gan¹(), Jinxia Zhang¹(), Lijuan Chen²(), Haiyang Xi², Binwu Zhang³, Tian Yong¹, Yuxi Wei²^,⁴

^1.College of Water Conservancy and Hydropower Engineering，Gansu Agricultural University，Lanzhou 730070，China
^2.Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^3.Forestry and Grassland Research Institute of Alxa，Alxa Left Banner 750300，Inner Mongalia，China
^4.University of Chinese Academy of Sciences，Beijing 100049，China

Received:2023-01-11 Revised:2023-04-10 Online:2023-07-20 Published:2023-08-14
Contact: Jinxia Zhang,Lijuan Chen

Abstract

Abstract:

The Ulan Buh Desert is one of the most decertified areas in China， as well as the most active area of wind and sand in the Yellow River Basin. In this paper， the plants from the beach of Yellow River to the hinterland of the desert were taken as the research object， and the spatial differences of the plant communities and the differentiation of plant water content and biomass were analyzed. The results showed that the plant composition along the Yellow River was simple， and the plant diversity was low with the highest Shannon-Wiener diversity index of 0.624. Herbaceous plants were more dominant near the beach of Yellow River， with the highest average plant water content （the maximum value was 80.6%）. Close to the hinterland of the desert， shrubs were more dominant， and the water content of the shrubs was higher than that along the Yellow River. From the coast of the Yellow River to the hinterland of the desert， the herbaceous biomass gradually decreased， but the water content of the above-ground parts increased. The key factors which caused the spatial differentiation of plant characteristics were soil water content and salinity. Soil water content can promote plant growth， and high-salt environment would inhibit the growth of herbaceous plants while have little effect on shrubs.

Key words: Ulan Buh Desert, plant diversity, plant water content, biomass, soil water and salt

CLC Number:

Q948.15

Kaiyuan Gan, Jinxia Zhang, Lijuan Chen, Haiyang Xi, Binwu Zhang, Tian Yong, Yuxi Wei. Characteristics and spatial differentiation of plant communities along the Yellow River in the Ulan Buh Desert[J]. Journal of Desert Research, 2023, 43(4): 180-190.

Figures/Tables 9

References 33

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生活型	物种名称	拉丁名	株高/cm	多度(级别代号)	频度/%	重要值/%
灌木	油蒿	Artemisia ordosica	63.70	COP	74.10	49.10
	白刺	Nitraria tangutorum	47.90	COP	14.30	36.27
	沙冬青	Ammopiptanthus mongolicus	43.40	SOI	3.70	11.16
	柽柳	Tamarix ramosissima	300.55	SP	3.70	7.96
	梭梭	Haloxylon ammodendron	86.85	SP	9.40	6.90
	沙拐枣	Calligonum mongolicum	70.30	SOI	6.50	5.05
	花棒	Hedysarum scoparium	133.55	SP	4.20	4.41
	红砂	Reaumuria songarica	27.40	SOI	5.10	3.40
草本	芦苇	Phragmites australis	59.70	COP	40.80	48.40
	沙鞭	Psammochloa villosa	55.45	SP	55.50	23.80
	虫实	Corispermum mongolicum	11.30	SOI	13.00	9.93
	碱草	Cressa cretica	16.65	SOI	8.80	9.62
	雾冰藜	Bassia dasyphylla	15.40	Un	6.50	6.13

生活型	物种名称	拉丁名	株高/cm	多度(级别代号)	频度/%	重要值/%
灌木	油蒿	Artemisia ordosica	63.70	COP	74.10	49.10
	白刺	Nitraria tangutorum	47.90	COP	14.30	36.27
	沙冬青	Ammopiptanthus mongolicus	43.40	SOI	3.70	11.16
	柽柳	Tamarix ramosissima	300.55	SP	3.70	7.96
	梭梭	Haloxylon ammodendron	86.85	SP	9.40	6.90
	沙拐枣	Calligonum mongolicum	70.30	SOI	6.50	5.05
	花棒	Hedysarum scoparium	133.55	SP	4.20	4.41
	红砂	Reaumuria songarica	27.40	SOI	5.10	3.40
草本	芦苇	Phragmites australis	59.70	COP	40.80	48.40
	沙鞭	Psammochloa villosa	55.45	SP	55.50	23.80
	虫实	Corispermum mongolicum	11.30	SOI	13.00	9.93
	碱草	Cressa cretica	16.65	SOI	8.80	9.62
	雾冰藜	Bassia dasyphylla	15.40	Un	6.50	6.13

		海拔	pH值	电导率	土壤水分	容重
植物多样性	R	0.092	0.226	-0.251	-0.070	0.048
植物多样性	P	0.578	0.167	0.123	0.672	0.770
植物含水率	R	-0.106	0.045	0.105	0.431^**	-0.272
植物含水率	P	0.519	0.784	0.523	0.006	0.094
植物生物量	R	-0.354^*	0.439^**	0.188	0.597^**	-0.501^**
植物生物量	P	0.027	0.005	0.251	0.000	0.001
草本含水率	R	-0.129	0.224	0.042	0.387^*	-0.237
草本含水率	P	0.276	0.204	0.816	0.024	0.178
灌木含水率	R	0.307	-0.555	-0.238	0.710	0.018
灌木含水率	P	0.119	0.784	0.232	0.060	0.927
草本生物量	R	-0.413^*	0.400^*	0.224	0.708^**	-0.640^**
草本生物量	P	0.021	0.026	0.225	0.000	0.000
灌木生物量	R	-0.173	0.335	0.382^*	0.302	-0.111
灌木生物量	P	0.387	0.088	0.049	0.126	0.582

		海拔	pH值	电导率	土壤水分	容重
植物多样性	R	0.092	0.226	-0.251	-0.070	0.048
植物多样性	P	0.578	0.167	0.123	0.672	0.770
植物含水率	R	-0.106	0.045	0.105	0.431^**	-0.272
植物含水率	P	0.519	0.784	0.523	0.006	0.094
植物生物量	R	-0.354^*	0.439^**	0.188	0.597^**	-0.501^**
植物生物量	P	0.027	0.005	0.251	0.000	0.001
草本含水率	R	-0.129	0.224	0.042	0.387^*	-0.237
草本含水率	P	0.276	0.204	0.816	0.024	0.178
灌木含水率	R	0.307	-0.555	-0.238	0.710	0.018
灌木含水率	P	0.119	0.784	0.232	0.060	0.927
草本生物量	R	-0.413^*	0.400^*	0.224	0.708^**	-0.640^**
草本生物量	P	0.021	0.026	0.225	0.000	0.000
灌木生物量	R	-0.173	0.335	0.382^*	0.302	-0.111
灌木生物量	P	0.387	0.088	0.049	0.126	0.582

因变量	自变量	未标准化系数		标准化系数	t	显著性	共线性统计
因变量	自变量	B	标准错误	Beta	t	显著性	容差	VIF
植物生物量	含水率	0.790	0.431	0.654	3.746	0.000	0.506	1.977
植物生物量	电导率	-0.114	0.043	-0.457	-2.659	0.012	0.506	1.977
草本生物量	含水率	0.024	0.040	1.067	6.771	0.000	0.517	1.932
草本生物量	电导率	-0.115	0.035	-0.517	-3.280	0.003	0.517	1.932
灌木生物量	电导率	0.585	0.283	0.382	2.068	0.049	0.999	1.000

Characteristics and spatial differentiation of plant communities along the Yellow River in the Ulan Buh Desert

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