Dynamics of soil nematode community during the succession of forests in southern subtropical China

doi:10.17520/biods.2022205

Abstract

Abstract:

Aims: The succession of southern subtropical forests can alter the composition of vegetation and soil environment, thus exerting a profound influence on soil biota. Consequentially, the changes in soil biota can then in turn influence the succession progress of the forest ecosystem. To date, the specifics related to the dynamics of soil biota during the succession of subtropical forests are not well understood. Here, we investigated the diversity and structural dynamics of the soil nematode community and associated it with environmental factors during the succession of forests (i.e., Pinus massoniana forest (PF)-mixed pine and broadleaf forest (MF)-monsoon evergreen broadleaf forest (MEBF)) in Dinghushan, Guangdong.
Methods: Soil samples from each forest were collected. The abundance, diversity, community composition, and ecological indices of soil nematode community as well as soil properties were analyzed and compared amongst different forests.
Results: (1) With the succession of southern subtropical forests, the α diversity of soil nematodes was significantly higher in MF and MEBF than that in PF; however, there were no significant changes in the total abundance of soil nematodes or the relative abundance of different trophic groups. (2) The enrichment index of soil nematodes in MF was significantly higher than that in PF, thus indicating higher soil fertility in MF, while the higher structural index in MEBF indicated a decreased disturbance degree of the ecosystem. (3) The soil moisture content and soil properties (excluding soil phosphorus levels) in MF were at the same level as that in MEBF while the soil pH was significantly lower than that in PF. The soil pH and soil moisture content were the predominant factors for the dynamics of the soil nematode community.
Conclusion: The responses of soil nematodes to vegetation succession are different in the abundance, diversity, and community composition, and the convergence of soil environment in the process of succession can explain the observed similarities in the nematode community between MF and MEBF.

Key words: southern subtropical forest, natural succession, diversity, soil nematode, soil health

Wenjia Wu, Ye Yuan, Jing Zhang, Lixia Zhou, Jun Wang, Hai Ren, Zhanfeng Liu. Dynamics of soil nematode community during the succession of forests in southern subtropical China[J]. Biodiv Sci, 2022, 30(12): 22205.

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URL: https://www.biodiversity-science.net/EN/10.17520/biods.2022205

https://www.biodiversity-science.net/EN/Y2022/V30/I12/22205

Figures/Tables 6

References 36

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	马尾松林 Pinus massoniana forest	针阔叶混交林 Mixed pine and broadleaf forest	常绿阔叶林 Monsoon evergreen broadleaf forest
土壤理化性质 Soil physiochemical properties
土壤pH Soil pH	3.99 ± 0.02^a	3.84 ± 0.01^c	3.89 ± 0.01^b
土壤含水量 Soil moisture content (%)	9.57 ± 0.60^b	17.16 ± 0.92^a	19.35 ± 1.13^a
土壤有机碳含量 Soil organic carbon content (g/kg)	9.24 ± 0.99^b	23.72 ± 2.35^a	23.28 ± 2.94^a
土壤总氮含量 Soil nitrogen content (mg/g)	0.75 ± 0.07^b	1.50 ± 0.08^a	1.54 ± 0.15^a
土壤总磷含量 Soil phosphorus content (mg/g)	0.14 ± 0.01^bc	0.16 ± 0.01^b	0.20 ± 0.01^a
土壤C/N比 Soil C/N ratio	12.48 ± 1.21^a	15.63 ± 1.08^a	14.92 ± 0.44^a
土壤C/P比 Soil C/P ratio	66.73 ± 6.99^b	144.29 ± 11.24^a	115.58 ± 11.69^a
土壤N/P比 Soil N/P ratio	5.33 ± 0.26^b	9.24 ± 0.41^a	7.69 ± 0.60^a
土壤微生物 Soil microbes
细菌磷脂脂肪酸含量 Bacterial phospholipid fatty acid (PLFAs) concentration (nmol/g)	1.81 ± 0.18^b	3.01 ± 0.19^a	2.79 ± 0.13^a
真菌磷脂脂肪酸含量 Fungal PLFAs concentration (nmol/g)	0.06 ± 0.00^b	0.09 ± 0.01^a	0.07 ± 0.00^ab
丛枝菌根真菌磷脂脂肪酸含量 Arbuscular mycorrhizal fungi (AMF) PLFAs concentration (nmol/g)	0.04 ± 0.01^b	0.1 ± 0.01^a	0.09 ± 0.01^a
放线菌磷脂脂肪酸含量 Actinomycetes PLFAs concentration (nmol/g)	0.50 ± 0.07^b	0.84 ± 0.05^a	0.81 ± 0.04^a
总微生物磷脂脂肪酸含量 Total microbial PLFAs concentration (nmol/g)	2.41 ± 0.25^b	4.04 ± 0.26^a	3.76 ± 0.18^a
真菌/细菌比 Fungi/Bacteria ratio	0.03 ± 0.00^a	0.03 ± 0.00^ab	0.02 ± 0.00^b
革兰氏阳性菌/革兰氏阴性菌比 Gram-positive/Gram-negative bacteria ratio	2.04 ± 0.05^b	2.05 ± 0.11^ab	2.45 ± 0.03^a
细菌相对丰度 Relative abundance of bacteria (%)	75.14 ± 0.43^a	74.48 ± 0.23^a	74.52 ± 0.29^a
真菌相对丰度 Relative abundance of fungi (%)	2.59 ± 0.22^a	2.31 ± 0.07^a	1.83 ± 0.09^b
丛枝菌根真菌相对丰度 Relative abundance of AMF (%)	1.72 ± 0.08^b	2.41 ± 0.12^a	2.31 ± 0.11^a
放线菌相对丰度 Relative abundance of actinomycetes (%)	20.55 ± 0.65^a	20.79 ± 0.22^a	21.34 ± 0.26^a

	马尾松林 Pinus massoniana forest	针阔叶混交林 Mixed pine and broadleaf forest	常绿阔叶林 Monsoon evergreen broadleaf forest
土壤理化性质 Soil physiochemical properties
土壤pH Soil pH	3.99 ± 0.02^a	3.84 ± 0.01^c	3.89 ± 0.01^b
土壤含水量 Soil moisture content (%)	9.57 ± 0.60^b	17.16 ± 0.92^a	19.35 ± 1.13^a
土壤有机碳含量 Soil organic carbon content (g/kg)	9.24 ± 0.99^b	23.72 ± 2.35^a	23.28 ± 2.94^a
土壤总氮含量 Soil nitrogen content (mg/g)	0.75 ± 0.07^b	1.50 ± 0.08^a	1.54 ± 0.15^a
土壤总磷含量 Soil phosphorus content (mg/g)	0.14 ± 0.01^bc	0.16 ± 0.01^b	0.20 ± 0.01^a
土壤C/N比 Soil C/N ratio	12.48 ± 1.21^a	15.63 ± 1.08^a	14.92 ± 0.44^a
土壤C/P比 Soil C/P ratio	66.73 ± 6.99^b	144.29 ± 11.24^a	115.58 ± 11.69^a
土壤N/P比 Soil N/P ratio	5.33 ± 0.26^b	9.24 ± 0.41^a	7.69 ± 0.60^a
土壤微生物 Soil microbes
细菌磷脂脂肪酸含量 Bacterial phospholipid fatty acid (PLFAs) concentration (nmol/g)	1.81 ± 0.18^b	3.01 ± 0.19^a	2.79 ± 0.13^a
真菌磷脂脂肪酸含量 Fungal PLFAs concentration (nmol/g)	0.06 ± 0.00^b	0.09 ± 0.01^a	0.07 ± 0.00^ab
丛枝菌根真菌磷脂脂肪酸含量 Arbuscular mycorrhizal fungi (AMF) PLFAs concentration (nmol/g)	0.04 ± 0.01^b	0.1 ± 0.01^a	0.09 ± 0.01^a
放线菌磷脂脂肪酸含量 Actinomycetes PLFAs concentration (nmol/g)	0.50 ± 0.07^b	0.84 ± 0.05^a	0.81 ± 0.04^a
总微生物磷脂脂肪酸含量 Total microbial PLFAs concentration (nmol/g)	2.41 ± 0.25^b	4.04 ± 0.26^a	3.76 ± 0.18^a
真菌/细菌比 Fungi/Bacteria ratio	0.03 ± 0.00^a	0.03 ± 0.00^ab	0.02 ± 0.00^b
革兰氏阳性菌/革兰氏阴性菌比 Gram-positive/Gram-negative bacteria ratio	2.04 ± 0.05^b	2.05 ± 0.11^ab	2.45 ± 0.03^a
细菌相对丰度 Relative abundance of bacteria (%)	75.14 ± 0.43^a	74.48 ± 0.23^a	74.52 ± 0.29^a
真菌相对丰度 Relative abundance of fungi (%)	2.59 ± 0.22^a	2.31 ± 0.07^a	1.83 ± 0.09^b
丛枝菌根真菌相对丰度 Relative abundance of AMF (%)	1.72 ± 0.08^b	2.41 ± 0.12^a	2.31 ± 0.11^a
放线菌相对丰度 Relative abundance of actinomycetes (%)	20.55 ± 0.65^a	20.79 ± 0.22^a	21.34 ± 0.26^a