Effects of nitrogen addition on soil springtail(Collembolan) community in a poplar plantation

doi:10.12302/j.issn.1000-2006.202209066

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2024, Vol. 48 ›› Issue (4): 243-253.doi: 10.12302/j.issn.1000-2006.202209066

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Effects of nitrogen addition on soil springtail(Collembolan) community in a poplar plantation

WANG Zimeng¹(), RUAN Honghua¹^,^*(), WU Xiaoqiao², YANG Yan², XIE Youchao², SHEN Caiqin³, DING Xuenong³, CAO Guohua³

1. Co-Innovation Center for Sustainable Forestry in Southern China, College of Ecology and Environment, Nanjing Forestry University, Nanjing 210037, China
2. Forestry Bureau of Jiangsu Province, Nanjing 210036, China
3. Dongtai State Forest Farm of Jiangsu Province, Dongtai 224200, China

Received:2022-09-29 Revised:2023-04-15 Online:2024-07-30 Published:2024-08-05
Contact: RUAN Honghua E-mail:799733209@qq.com;hhruan@njfu.edu.cn

Abstract

Abstract:

【Objective】Springtail(Collembolan species), as a kind of microarthropods widely distributed in soils, plays an important role in regulating the functions of soil ecosystems. However, the effects of nitrogen deposition on springtail communities in soils are poorly understood. This study aimed to elucidate the effects of nitrogen addition on springtail communities in soils by simulating nitrogen deposition for 10 years in a poplar plantation in Dongtai Forest Farm, Jiangsu Province.【Method】Four experimental treatments with different concentrations of nitrogen addition, i.e., the control (N₀,No nitrogen addition), N₅[5 g/(m²·a)], N₁₅[15 g/(m²·a)], and N₃₀[30 g/(m²·a)], were established in May 2012, respectively. A total of four replicate plots were prepared for each treatment, thus accounting for a total of 16 sample plots. The springtail communities in the litter and soil layers were analyzed in July 2021, October 2021, January 2022, and April 2022. The springtails in the litter layer were collected using a collection frame. Springtail samples were collected using soil drills with different diameters from the three soil layer at depths of 0 (floormas), 10 and 25 cm, respectively. Following transportation to the laboratory, the springtails were collected according to the Tullgren method, and the physical and chemical properties of the soil were analyzed. Statistical analysis was performed using SPSS 26 and Canoco 5.0.【Result】A total of 1 446 springtails, belonging to 4 Orders, 7 Families, and 18 Genera, were collected in this study. Of these, the Isoma, Toocerus, Entomobrya and Folsomia genera were the most abundant and accounted for 66.87% of the total number of individuals. The number of springtails in the soil increased significantly at a nitrogen concentration of 15 g/(m²·a), but decreased at a concentration of 30 g/(m²·a). The number of springtails in litter layer was significantly higher than that in the soil layer. The number of individuals varied across the seasons, in the following order: October (autumn) > July (summer) > April (spring) > January (winter). The Shannon-Wiener diversity index and Simpson dominance index were highest in the 15 g/(m²·a) treatment group, whereas the Pielou evenness index was highest for the 30 g/(m²·a) treatment group. The results of RDA analysis demonstrated that the pH, nitrate nitrogen content, and the C/N were the primary environmental factors that affected the distribution of springtails in the soil, and that different springtail populations responded differently to the environmental factors.【Conclusion】The results demonstrated that nitrogen deposition affected the composition of the springtail community in the soil. The findings further revealed that the application of nitrogen within a moderate concentration might increase the number and diversity of springtails; however, the excessive addition of nitrogen may reduce the number of springtails, thus indicating a threshold effect.

Key words: poplar, plantation, nitrogen addition, soil fauna, Collembola, community structure, community diversity

CLC Number:

S718.5

WANG Zimeng, RUAN Honghua, WU Xiaoqiao, YANG Yan, XIE Youchao, SHEN Caiqin, DING Xuenong, CAO Guohua. Effects of nitrogen addition on soil springtail(Collembolan) community in a poplar plantation[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2024, 48(4): 243-253.

Figures/Tables 9

Table 1

Table 2

Table 3

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Table 4

Pearson correlation coefficients between springtail groups and soil properties in poplar forest"

项目	个体数 individuals	Shannon- Wiener 多样性指数(H')	Simpson 优势度指数(D)	Pielou 均匀度指数(J)
含水率 WC	-0.350	0.066	0.126	0.120
pH	-0.626^**	0.003	-0.108^*	0.478
可溶性有机碳含量 DOC	-0.029	-0.070	-0.050	0.157
全氮含量 TN	-0.053	-0.048	-0.040	0.023
有机碳含量 SOC	-0.169	-0.498^*	-0.555^*	-0.408
碳氮比 C/N	-0.081	-0.342	-0.407^*	-0.386
铵态氮含量 $N H 4 +$ -N	0.347	-0.083	-0.133	-0.383
硝态氮含量 $N O 3 -$ -N	0.628^**	0.572^*	0.590^*	0.449

Table 4

Fig. 5

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氮沉降水平 N deposition level	平均胸径/cm averge diameter at breast height	平均树高/m average tree height	林冠郁闭度/% canopy closure
N₀	22.37±3.62	21.48±2.05	65
N₅	23.82±2.85	21.55±1.55	70
N₁₅	24.71±3.48	21.18±1.56	85
N₃₀	25.55±2.86	21.38±1.57	60

属群 genera group	各添加氮处理下样地跳虫数量 the number of springtail under different N deposition levels				合计 total
属群 genera group	N₀	N₅	N₁₅	N₃₀	合计 total
等节跳属 Isotoma	109⁺⁺⁺	100⁺⁺⁺	168⁺⁺⁺	63⁺⁺⁺	440⁺⁺⁺
鳞跳属 Toocerus	41⁺⁺⁺	36⁺⁺⁺	96⁺⁺⁺	27⁺⁺⁺	200⁺⁺⁺
长跳属 Entomobrya	33⁺⁺⁺	29⁺⁺⁺	92⁺⁺⁺	27⁺⁺⁺	181⁺⁺⁺
小等跳属 Isotomiella	28⁺⁺	23⁺⁺	76⁺⁺⁺	19⁺⁺	146⁺⁺⁺
裔符跳属 Folsomides	26⁺⁺	34⁺⁺⁺	63⁺⁺	18⁺⁺	141⁺⁺
疣跳属 Neanura	22⁺⁺	20⁺⁺	31⁺⁺	18⁺⁺	91⁺⁺
球角跳属 Hypogastrura	9⁺⁺	13⁺⁺	17⁺⁺	9⁺⁺	48⁺⁺
奇跳属 Xenylla	10⁺⁺	8⁺⁺	19⁺⁺	8⁺⁺	45⁺⁺
德跳属 Desoria	10⁺⁺	4⁺⁺	19⁺⁺	5⁺⁺	38⁺⁺
小圆跳属 Sminthurinus	4⁺⁺	6⁺⁺	20⁺⁺	6⁺⁺	36⁺⁺
符跳属 Folsomia	7⁺⁺	7⁺⁺	9⁺⁺	3⁺⁺	26⁺⁺
驼跳属 Cyphoderus	8⁺⁺	3⁺⁺	11⁺⁺	1⁺	23⁺⁺
原等跳属 Proisotoma	1⁺	1⁺	7⁺⁺	1⁺	10⁺
类符跳属 Folsomina	0	4⁺⁺	3⁺	0	7⁺
棘跳属 Onychiurus	3⁺	1⁺	0	2⁺	6⁺
齿棘圆跳属 Arrhopalites	3⁺	1⁺	1⁺	0	5⁺
裸长角跳属 Sinella	2⁺	0	0	0	2⁺
伪亚跳属 Pseudachorutes	0	0	1⁺	0	1⁺
总个体数 total number of individuals	316	290	633	207	1 446\
种群(属)总数 total number of groups(genera)	16	16	16	14	18

处理 treatment	Shannon-Wiener 多样性指数(H')	Simpson 优势度指数(D)	Pielou均匀度指数(J)
N₀	0.71±0.65 a	0.52±0.35 ab	0.91±0.10 ab
N₅	0.65±0.55 a	0.57±0.32 ab	0.90±0.16 a
N₁₅	0.97±0.61 b	0.60±0.27 b	0.91±0.07 ab
N₃₀	0.54±0.62 a	0.45±0.39 a	0.95±0.06 b

Effects of nitrogen addition on soil springtail(Collembolan) community in a poplar plantation

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