民勤黏土沙障-人工梭梭林物种多样性及土壤水分变化特征

doi:10.13866/j.azr.2024.04.08

Abstract

Abstract:

In the present study, clay sand barrier-artificial Haloxylon ammodendron plantations and a mobile sand site (control) in the Minqin desert area were used to investigate the plant species composition, species importance value, dominant species characteristics, species diversity, and soil moisture content. This study explored the long term effects of clay sand barrier-artificial Haloxylon ammodendron plantation construction on regional plant community structure, species diversity, and soil moisture. In total, 12 species belonging to 12 genera and 6 families were recorded in the clay sand barrier-artificial Haloxylon ammodendron plantations in the Minqin desert area, with Chenopodiaceae and Zygophyllaceae being the dominant families. The construction of the artificial sand control system significantly increased the number of plant species in the region (from 4 species to 5-8 species). With an increase in the installation period, the vegetation structure gradually evolved from Agriophyllum squarrosum and Haloxylon ammodendrine (dominant species) to Grubovia dasyphylla, Kali collinum, Limonium aureum, and Haloxylon ammodendrine (dominant species). The life forms also shifted from a single type dominated by annual herbaceous plants to a composite type consisting of annual herbaceous plants, perennial herbaceous plants, and shrubs. Regarding alpha diversity, species richness index, Shannon-Wiener index, Simpson index, Pielou index, and Alatalo index showed an overall unimodal trend, with the highest species number and most even species distribution observed in the 20-year installation site and the lowest species number and most uneven species distribution observed in the control sand site. The Jaccard index of plant community similarity between neighboring sites with various installation periods showed the following order: control sand site > 1-year installation site > 20-year and 40-year installation sites > 1-year and 5-year installation sites > 10-year and 20-year installation sites > 40-year and 60-year installation sites > 5-year and 10-year installation sites. The dissimilarity index and Cody index showed the opposite trend. The fluctuation pattern of the regional soil moisture content was consistent with the trend of plant community succession. Compared with deeper soil layers (40-60 cm), the role of shallow soil layers (10-30 cm) in the natural succession process of regional plants was more pronounced.

Key words: clay sand barrier, Haloxylon ammodendron, species diversity, soil moisture, Minqin

SONG Dacheng, MA Quanlin, LIU Shiquan, WEI Linyuan, WU Hao, DUAN Xiaofeng, GUO Shujiang. Species diversity in Minqin clay sand barrier-artificial Haloxylon ammodendron plantations and the characteristics of soil moisture changes[J].Arid Zone Research, 2024, 41(4): 618-628.

Figures/Tables 6

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Fig. 1

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References 35

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生活型	科		属		种
生活型	数量	占总科数/%	数量	占总属数/%	数量	占总种数/%
一年生草本	4	57.14	7	58.33	7	58.33
多年生草本	1	14.29	1	8.33	1	8.33
灌木	3	42.86	4	33.33	4	33.33

物种	科	属	生活型	重要值
物种	科	属	生活型	A	B	C	D	E	F	G
碟果虫实 (Corispermum patelliforme)	藜科 Chenopodiaceae	虫实属 Corispermum	一年生草本	-	-	-	0.059	-	-	-
画眉草 (Eragrostis pilosa)	禾本科 Poaceae	画眉草属 Eragrostis	一年生草本	-	-	-	0.031	0.070	0.100	0.081
沙米 (Agriophyllum squarrosum)	藜科 Chenopodiaceae	沙蓬属 Agriophyllum	一年生草本	0.289	0.272	0.165	-	0.156	0.087	-
砂蓝刺头 (Echinops gmelini)	菊科 Compositae	蓝刺头属 Echinops	一年生草本	-	-	-	0.043	-	0.040	-
雾冰藜 (Grubovia dasyphylla)	藜科 Chenopodiaceae	雾冰藜属 Bassia	一年生草本	0.046	0.091	-	0.110	0.081	-	0.073
盐生草 (Halogeton glomeratus)	藜科 Chenopodiaceae	盐生草属 Halogeton	一年生草本	-	-	0.077	0.042	-	0.033	0.051
猪毛菜 (Salsola collina)	藜科 Chenopodiaceae	猪毛菜属 Salsola	一年生草本	0.069	0.067	-	0.124	-	-	0.093
黄花补血草 (Limonium aureum)	白花丹科 Plumbaginaceae	补血草属 Limonium	多年生草本	-	0.014	-	0.033	0.098	0.026	-
霸王 (Zygophyllum xanthoxylon)	蒺藜科 Zygophyllaceae	驼蹄瓣属 Zygophyllum	灌木	-	-	-	-	0.102	-	-
白刺 (Nitraria tangutorum)	蒺藜科 Zygophyllaceae	白刺属 Nitraria	灌木	0.596	0.308	0.243	-	-	0.131	-
沙拐枣 (Calligonum mongolicum)	蓼科 Polygonaceae	沙拐枣属 Calligonum	灌木	-	0.092	-	-	0.161	0.385	-
梭梭 (Haloxylon ammodendron)	藜科 Chenopodiaceae	梭梭属 Haloxylon	灌木	-	0.155	0.515	0.557	0.333	0.197	0.702

样地编号	丰富度指数	Shannon-Wiener指数	Simpson指数	Pielou指数	Alatalo指数	优势度指数
A	1.467±0.743c	0.142±0.218e	0.075±0.119c	0.147±0.235c	0.180±0.268c	0.832±0.376a
B	1.733±0.704bc	0.423±0.282cd	0.364±0.263b	0.555±0.382b	0.709±0.460ab	0.435±0.347bc
C	2.400±0.828b	0.781±0.386b	0.495±0.220ab	0.836±0.340a	0.822±0.336a	0.240±0.262c
D	2.000±1.254bc	0.529±0.487bcd	0.328±0.284b	0.556±0.473b	0.535±0.458b	0.399±0.397bc
E	3.667±1.291a	1.104±0.316a	0.638±0.096a	0.900±0.093a	0.012±0.029c	0.254±0.107c
F	3.333±1.291a	0.672±0.386bc	0.413±0.282b	0.574±0.331b	0.011±0.040c	0.559±0.305b
G	1.733±1.033bc	0.371±0.369de	0.371±0.369b	0.468±0.413b	0.015±0.041c	0.554±0.380b

β多样性指数	样地编号	B	C	D	E	F	G
Jaccard指数	A	0.571	0.333	0.333	0.375	0.200	0.500
	B		0.375	0.364	0.556	0.500	0.333
	C			0.200	0.222	0.500	0.286
	D				0.364	0.455	0.625
	E					0.500	0.333
	F						0.300
相异性指数	A	0.273	0.500	0.500	0.455	0.667	0.333
	B		0.455	0.467	0.286	0.333	0.500
	C			0.667	0.636	0.333	0.556
	D				0.467	0.375	0.231
	E					0.333	0.500
	F						0.538
Cody指数	A	1.500	2.000	3.000	2.500	4.000	1.500
	B		2.500	3.500	2.000	3.000	3.000
	C			4.000	3.500	2.000	2.500
	D				3.500	3.000	1.500
	E					2.500	3.000
	F						3.000

Species diversity in Minqin clay sand barrier-artificial Haloxylon ammodendron plantations and the characteristics of soil moisture changes

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