Fungal succession in decomposing woody debris across a tropical forest disturbance gradient

doi:10.1016/j.soilbio.2021.108142

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	Fungal succession in decomposing woody debris across a tropical forest disturbance gradient
	Dossa,Gbadamassi G. O.; Yang,Yun-Qiang ; Hu,Weiming ; Paudel,Ekananda ; Schaefer,Douglas ; Yang,Yong-Ping ; Cao,Kun-Fang ; Xu,Jian-Chu; Bushley,Kathryn E.; Harrison,Rhett D.
	2021
发表期刊	SOIL BIOLOGY & BIOCHEMISTRY
ISSN	0038-0717
卷号	155 页码:108142
摘要	Fungi decompose woody debris, an important carbon pool in forests. Fungal community structure is expected to vary according to the wood species, habitats and extent of abiotic disturbance, which have consequences for carbon cycling in tropical forests. Here we examined the effects of fungal diversity and composition on woody debris decomposition rates and sought potential mechanisms to explain an observed lack of difference in decomposition rates across a disturbance gradient in a tropical montane rainforest in Xishuangbanna, SW China. We measured wood specific gravity (WSG) loss from 280 logs of Litsea cubeba and Castanopsis mekongensis over 3 years and monitored fungal communities from 418 samples using next-generation sequencing after 0, 18 and 36 months field exposure. Wood species and termite presence determined changes in fungal diversity through time. Overall there was a peak in fungal diversity at 18 mo, suggesting an initial period of colonization followed by a period of increasingly competitive interactions leading to decreased diversity. Litsea logs, which had relatively low initial WSG and thinner bark, harbored higher fungal diversity. Shared fungal OTUs between wood species peaked at 18 mo (similar to 50%). However, fungal diversity was not a significant predictor of WSG loss. An effect of habitat on fungal community composition suggests that functional replacement explains the similar decay rates across the disturbance gradient. In addition, the proportions of saprotroph and white-rot fungi increased through time regardless of wood species. Termite presence reduced WSG loss, but the effect was mediated via the abundance of soft rot fungi. Our results suggest that changes in functional traits, rather than fungal species diversity, may better explain variation in WSG loss. Future studies should investigate roles of fungal functional traits and rot types, particularly those of Ascomycete fungi, whose roles in wood decay are still poorly characterized.
关键词	Carbon cycle Coarse woody debris Decomposition Fungi Ecosystem function Landscape Tropical forest Wood density INHABITING FUNGI DECAY DIVERSITY BARK COMMUNITIES TERMITES
DOI	10.1016/j.soilbio.2021.108142
WOS记录号	WOS:000626605700001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/73714
专题	中国科学院昆明植物研究所
作者单位	1.Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China 2.Dossa, Gbadamassi G. O.] Chinese Acad Sci, Ctr Plant Ecol, Core Bot Gardens, Mengla 666303, Yunnan, Peoples R China 3.Chinese Acad Sci, Kunming Inst Bot, CAS Key Lab Plant Divers & Biogeog East Asia KLPB, Kunming 650201, Yunnan, Peoples R China 4.World Agroforestry Ctr, East & Cent Asia Reg Off, Kunming 650201, Yunnan, Peoples R China 5.Univ Florida, Entomol & Nematol Dept, Gainesville, FL USA 6.Nepal Acad Sci & Technol, Khumaltar, Lalitpur, Nepal 7.Guangxi Univ, Plant Ecophysiol & Evolut Grp, State Key Lab Conservat & Utilizat Subtrop Agrobi, Nanning 530004, Guangxi, Peoples R China 8.Guangxi Univ, Coll Forestry, Nanning 530004, Guangxi, Peoples R China 9.Bushley, Kathryn E.] Univ Minnesota, Dept Plant & Microbial Biol, St Paul, MN 55108 USA 10.Harrison, Rhett D.] World Agroforestry Ctr, 13 Elm Rd, Lusaka, Zambia
推荐引用方式 GB/T 7714	Dossa,Gbadamassi G. O.,Yang,Yun-Qiang,Hu,Weiming,et al. Fungal succession in decomposing woody debris across a tropical forest disturbance gradient[J]. SOIL BIOLOGY & BIOCHEMISTRY,2021,155:108142.
APA	Dossa,Gbadamassi G. O..,Yang,Yun-Qiang.,Hu,Weiming.,Paudel,Ekananda.,Schaefer,Douglas.,...&Harrison,Rhett D..(2021).Fungal succession in decomposing woody debris across a tropical forest disturbance gradient.SOIL BIOLOGY & BIOCHEMISTRY,155,108142.
MLA	Dossa,Gbadamassi G. O.,et al."Fungal succession in decomposing woody debris across a tropical forest disturbance gradient".SOIL BIOLOGY & BIOCHEMISTRY 155(2021):108142.

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