Distribution of soil factors across the habitat gradient of Spartina alterniflora and Suaeda salsa communities

doi:10.12302/j.issn.1000-2006.202004028

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (3): 37-44.doi: 10.12302/j.issn.1000-2006.202004028

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Distribution of soil factors across the habitat gradient of Spartina alterniflora and Suaeda salsa communities

XIA Wenwen(), LI Xiang, WANG Yuqi, XU Chi, LIU Maosong^*()

School of Life Sciences, Nanjing University, Nanjing 210023, China

Received:2020-04-16 Revised:2020-08-20 Online:2021-05-30 Published:2021-05-31
Contact: LIU Maosong E-mail:1203106974@qq.com;msliu@nju.edu.cn

Abstract

Abstract:

【Objective】The purpose of this study was to investigate the effects of Spartina alterniflora invasion on dynamic changes in soil factors and how soil factors alter the invasion process of Spartina alterniflora. 【Method】 Samples were taken from the six gradient zones in the ecotone of Spartina alterniflora and Suaeda salsa communities at depths of 0-10, ≥10-30 and ≥30-60 cm, in Yancheng Coastal Wetland Jiangsu Province. We investigated the plant traits and analyzed the main soil factors. 【Result】 ① Soil factors at 0-10 cm, except the average particle size and total phosphorus, were significantly different from those at the other depths.② The surface soil factors and community characteristics displayed a gradient distribution pattern. Compared with S. salsa, the surface soil of Spartina alterniflora had higher soil water content, the total organic carbon, total nitrogen, and lower bulk density, salinity and pH.③ With the transition from the interior to the edge zone of the Spartina alterniflora community, plant biomass, height and coverage decreased. Surface soil water content, the total organic carbon and nitrogen generally decreased, while the bulk density and pH increased. Additionally, salinity, particle size and total phosphorus showed no significant differences among the different zones. 【Conclusion】 The invasion of Spartina alterniflora altered soil factors mainly in the surface layer, which included increased soil water content, total organic carbon, nitrogen, and reduced pH, bulk density and salinity. As the duration of invasion increased, the total organic carbon and nitrogen showed cumulative effects. The increase in soil water content, the total organic carbon and nitrogen may promote the comparatively competitive advantages of Spartina alterniflora.

Key words: coastal wetland, biological invasion, habitat gradient, soil transformation, plant competition, Jiangsu Province

CLC Number:

S718

XIA Wenwen, LI Xiang, WANG Yuqi, XU Chi, LIU Maosong. Distribution of soil factors across the habitat gradient of Spartina alterniflora and Suaeda salsa communities[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2021, 45(3): 37-44.

Figures/Tables 4

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Table 1

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地点 site	梯度 zone	植物 plant	生物量/ (kg·m^-2) biomass	株高/cm height	盖度/% cover
盐城保护区 Yancheng Reserve	Z1	互花米草 Spartina alterniflora	2.18±0.40	110.00±25.42	100±0.00
	Z2		1.84±0.71	101.29±20.04	95±7.07
	Z3		1.49±0.78	95.83±23.01	76±4.79
	Z4		0.06±0.03	73.50±10.66	20±0.00
	Z5	碱蓬 Suaeda salsa	0.01±0.01	20.50±1.73	5±0.00
	Z6	碱蓬 Suaeda salsa	0.02±0.00	23.25±2.75	5±0.00
大丰保护区 Dafeng Reserve	Z1	互花米草 Spartina alterniflora	0.87±0.18	80.54±8.35	81±7.50
	Z2		0.57±0.21	58.83±11.44	59±17.50
	Z3		0.43±0.25	50.46±10.50	44±17.97
	Z4		0.11±0.10	35.19±2.88	20±14.35
	Z4	碱蓬 Suaeda salsa	0.02±0.01	24.57±2.88	7.50±4.50
	Z5		0.07±0.05	19.38±4.70	21±14.93
	Z6		0.15±0.07	18.42±2.02	41±16.01

Distribution of soil factors across the habitat gradient of Spartina alterniflora and Suaeda salsa communities

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