气候变化领域集成服务门户(CCPortal): Effects of alpine meadows with different degradation gradients on the stability of the soil micro-foodweb in the Tibetan Plateau

CCPortal

DOI	10.1016/j.ecolind.2023.111390
	Effects of alpine meadows with different degradation gradients on the stability of the soil micro-foodweb in the Tibetan Plateau
	Nian, Lili; Zhang, Xiaoning; Li, Liangliang; Zhou, Shu-Yi-Dan; Liu, Xingyu; Li, Xiaodan; Liu, Xiaoyu; Zhao, Qiqi; Wu, Yingying; Haider, Fasih Ullah; Liu, Xuelu; Yang, Yingbo
发表日期	2024
ISSN	1470-160X
EISSN	1872-7034
卷号	158
英文摘要	Resource-transfer connections among bacteria, fungi, and microbivorous nematodes play an integral role in the decomposition pathways of soil micro-foodweb. Exploring the response of soil bacteria, fungi, and nematodes to grassland degradation is crucial for predicting the direction and trajectory of degradation. However, the knowledge about soil bacteria-fungi-nematode interactions in ecosystem function and nutrient cycling must be highlighted properly, especially in the Qinghai-Tibet Plateau. Therefore, this study focuses on four alpine meadows at different degenerate gradients (non-degraded grassland, slightly degraded grassland, moderately degraded grassland, and severely degraded grassland) on the Qinghai-Tibet Plateau. The investigation of soil bacteria-fungi-nematode interactions uses high-throughput sequencing and correlation network analysis. The results demonstrate significant variations in the composition of soil nematode genera, and bacterial and fungal phyla, across different degradation stages. Moreover, the diversity of nematodes, bacteria and fungi declined as grassland degradation worsened. Principal component analysis (PCA) revealed that alpine meadows with varying degradation gradients significantly influenced the community structure of bacteria, fungi, and nematodes. Mantel analysis indicated that soil water content (P < 0.05), total phosphorus (P < 0.05), and total nitrogen (P < 0.05) were the primary soil properties affecting the soil bacterial community. Similarly, available soil potassium (P < 0.05), microbial biomass carbon (P < 0.05), and microbial biomass nitrogen (P < 0.05) were the main soil factors influencing the soil fungal community. In contrast, the correlation between individual soil characteristics and soil nematodes did not reach a significant level, suggesting that a blend of physical and chemical properties regulates the soil nematode community. As grassland degradation intensified, the number of links in the interaction network of bacteria, fungi, and nematodes increased. Particularly, the networks between fungi and nematodes expanded, and the key species within each network varied with the different stages of grassland degradation. Concurrently, soil micro-foodweb decomposition pathways shifted. In the ND treatment, bacteria and fungi jointly dominated the degradation channels of the soil micro-food web, while the LD and MD treatments mainly dominated the degradation channels of fungi. On the other hand, SD treatment was dominated by bacterial degradation channels. This research adds to our theoretical understanding of meadow soil micro-foodwebs and the sustainable use of alpine grasslands in the Qinghai-Tibet Plateau.
关键词	Degraded alpine meadow Nematode metabolic footprint Related ecological network Soil micro-foodweb Qinghai-Tibet Plateau
英文关键词	COMMUNITY STRUCTURE; PHOSPHORUS LIMITATION; CARBON SEQUESTRATION; EXTRACTION METHOD; MATURITY INDEX; CLIMATE-CHANGE; BACTERIAL; PLANT; NITROGEN; NEMATODES
WOS研究方向	Biodiversity Conservation ; Environmental Sciences
WOS记录号	WOS:001140305500001
来源期刊	ECOLOGICAL INDICATORS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283373
作者单位	Gansu Agricultural University; Gansu Agricultural University; Chinese Academy of Sciences; South China Botanical Garden, CAS; Gansu Agricultural University; Xianyang Normal University
推荐引用方式 GB/T 7714	Nian, Lili,Zhang, Xiaoning,Li, Liangliang,et al. Effects of alpine meadows with different degradation gradients on the stability of the soil micro-foodweb in the Tibetan Plateau[J],2024,158.
APA	Nian, Lili.,Zhang, Xiaoning.,Li, Liangliang.,Zhou, Shu-Yi-Dan.,Liu, Xingyu.,...&Yang, Yingbo.(2024).Effects of alpine meadows with different degradation gradients on the stability of the soil micro-foodweb in the Tibetan Plateau.ECOLOGICAL INDICATORS,158.
MLA	Nian, Lili,et al."Effects of alpine meadows with different degradation gradients on the stability of the soil micro-foodweb in the Tibetan Plateau".ECOLOGICAL INDICATORS 158(2024).