气候变化领域集成服务门户(CCPortal): Fire return interval influences soil food web structure and stability in an oak-pine savanna

CCPortal

DOI	10.1007/s11104-024-06646-2
	Fire return interval influences soil food web structure and stability in an oak-pine savanna
	Pressler, Yamina; Wilson, Gail; Cotrufo, M. Francesca; Moore, John C.
发表日期	2024
ISSN	0032-079X
EISSN	1573-5036
英文摘要	Background and aimsFires are expected to become more frequent in many ecosystems due to climate change. Shifting fire regimes may affect soil food web interactions and impact soil functions including decomposition, nutrient cycling, and soil organic matter formation. We evaluated soil food web structure, function, and stability along a fire frequency gradient.MethodsWe studied the effect of fire return interval on soil food webs in a long-term fire return interval experiment in an oak-pine savanna. We measured soil biota biomass of major microbial groups (gram positive bacteria; gram negative bacteria; arbuscular mycorrhizal (AM) fungi; saprotrophic fungi) using phospho- and neutral-lipid fatty acid assessments. We applied an energetic food web modeling framework to investigate soil food web structure, function, and stability.ResultsSoil biota community composition and biomass were conserved across the fire frequency gradient, but biomass of AM fungal storage compounds decreased with less frequent fires. Soil food web complexity decreased with FRI, driven by a loss of fungal consumers and predators. Soil food webs at 4-year fire frequencies were significantly less stable and less resilient than those at either low or high fire frequencies. These community shifts did not lead to meaningful changes in modeled C and N mineralization.ConclusionThough soil food web biomass and function were conserved along the fire frequency gradient, food webs were structurally unique and not equally stable. This study reveals latent dynamics of soil communities that hint towards vulnerable food web architectures at the transition between forest and savanna ecosystems.
英文关键词	Soil food web; Soil microorganisms; Soil fauna; Fire frequency; Stability; Pyrogenic carbon
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS记录号	WOS:001201750000003
来源期刊	PLANT AND SOIL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300897
作者单位	California State University System; California Polytechnic State University San Luis Obispo; Oklahoma State University System; Oklahoma State University - Stillwater; Colorado State University
推荐引用方式 GB/T 7714	Pressler, Yamina,Wilson, Gail,Cotrufo, M. Francesca,et al. Fire return interval influences soil food web structure and stability in an oak-pine savanna[J],2024.
APA	Pressler, Yamina,Wilson, Gail,Cotrufo, M. Francesca,&Moore, John C..(2024).Fire return interval influences soil food web structure and stability in an oak-pine savanna.PLANT AND SOIL.
MLA	Pressler, Yamina,et al."Fire return interval influences soil food web structure and stability in an oak-pine savanna".PLANT AND SOIL (2024).